JP6700066B2

JP6700066B2 - Impermeable structure at joints between structures

Info

Publication number: JP6700066B2
Application number: JP2016035482A
Authority: JP
Inventors: 和木　多克; 多克和木; 亘大橋; 新城戸崎
Original assignee: 西武ポリマ化成株式会社
Priority date: 2016-02-26
Filing date: 2016-02-26
Publication date: 2020-05-27
Anticipated expiration: 2036-02-26
Also published as: JP2017150270A

Description

本発明は、構造物間の目地部の遮水構造に関する。 The present invention relates to a water-impervious structure for joints between structures.

ケーソンやブロック等の重力式構造物が管理型廃棄物最終処分場の護岸として用いられることが多い。この場合、隣接するケーソン間などの構造物間の目地部に、地震などによる地盤変動や不等沈下などにより目地部の間隔が変位しても土砂、廃棄物、保有水、遮水材などの流出を防止するため、遮水構造が設けられる。 Gravity type structures such as caisson and blocks are often used as revetments for managed waste final disposal sites. In this case, even if the space between joints is displaced due to ground movement or uneven settlement due to an earthquake, etc. An impermeable structure is provided to prevent outflow.

構造物間の目地部の遮水構造は、例えば特許文献１に開示されたものがあり、隣接するケーソン間などの目地部に目地間隔より広い目地材を、間隔をあけて２つ取り付け、２つの目地材間の目地部に目地部遮水材としてアスファルトマスチックなどを充填して構成されている。これにより、主として目地材間に充填された目地部遮水材により、地震などによる地盤変動や不等沈下などによって目地部の間隔が変位しても土砂、廃棄物、保有水、遮水材などの流出を防止して遮水する。 A water-impervious structure at joints between structures is disclosed in, for example, Patent Document 1, and two joint materials wider than the joint gap are attached to joints such as between adjacent caissons at intervals. The joint between the two joints is filled with asphalt mastic as a joint water-blocking material. As a result, mainly due to the joint water-blocking material filled between the joint materials, even if the joint space is displaced due to ground movement or uneven settlement due to an earthquake, etc., soil, waste, retained water, water-blocking materials, etc. Prevent outflow of water and block water.

特開２００５−１４６６５９号公報JP, 2005-146659, A

特許文献１に開示された遮水構造では、これまでの設計基準とされている地震動（レベル１地震動）の変位に追随できるものとされている。
ところが、近年、これまでの地震動より大きな地震動（レベル２地震動）に対して遮水できるようにしたり、短期間での修復により初期の遮水性を確保できるものが求められている。特に、大きな地震動で目地材が損傷すると、目地部遮水材が目地材間から流出し、遮水性を確保することができなくなるという問題がある。 The water-impervious structure disclosed in Patent Document 1 is supposed to be able to follow the displacement of seismic motion (level 1 seismic motion), which has been the design standard so far.
However, in recent years, there has been a demand for a material that can block water against earthquake motions (level 2 earthquake motion) that are larger than the existing earthquake motions and that can secure the initial water blocking property by repairing in a short period of time. In particular, when a joint material is damaged by a large earthquake motion, the joint water-blocking material flows out from between the joint materials, which makes it impossible to secure water impermeability.

本発明は、上記従来技術の問題点に鑑みてなされたもので、想定される地震動に対して遮水性を確保することができる構造物間の目地部の遮水構造を提供することを目的とする。 The present invention has been made in view of the problems of the above-described conventional art, and an object thereof is to provide a water-impervious structure for joints between structures that can ensure water impermeability against an assumed earthquake motion. To do.

上記目的を達成するため、本発明の構造物間の目地部の遮水構造は、
目地部を挟んで配置された構造物間の変位を許容し、前記目地部を遮水する構造物間の目地部の遮水構造であって、
弾性部材によって形成されて前記目地部を跨いで前記構造物に両端部が固定され、前記構造物間の変位を許容して前記目地部を遮水する止水部材と、
前記止水部材が間隔をあけて固定された前記止水部材間の前記目地部に、前記構造物間の最大変位に対して変位した前記止水部材の底部を浸漬させた状態として遮水できる前記目地部の高さの中間部まで充填された流動性遮水材と、を備える、
ことを特徴とする。
また、本発明の構造物間の目地部の遮水構造は、
目地部を挟んで配置された構造物間の変位を許容し、前記目地部を遮水する構造物間の目地部の遮水構造であって、
弾性部材によって形成されて前記目地部を跨いで前記構造物に両端部が固定され、前記構造物間の変位を許容して前記目地部を遮水する止水部材と、
前記止水部材が間隔をあけて固定された前記止水部材間の前記目地部に、前記構造物間の最大変位に対して変位した前記止水部材の底部を遮水できる高さまで充填された流動性遮水材と、を備え、
前記止水部材は、蛇腹状に形成された板状止水部材または、複数の円筒部を連結した円筒状止水部材で構成される余長部を備え、
前記余長部への前記流動性遮水材の回り込みを防止する回り込み防止部材が設けられている、
ことを特徴とする。 In order to achieve the above object, the water-impervious structure of the joint between the structures of the present invention,
Allowing the displacement between the structures arranged across the joint, the water-impervious structure of the joint between the structures that block the joint water,
A water stop member formed by an elastic member, both ends of which are fixed to the structure straddling the joint portion, permitting displacement between the structures and water-blocking the joint portion,
The bottom of the water blocking member, which is displaced with respect to the maximum displacement between the structures, is immersed in the joint between the water blocking members to which the water blocking members are fixed at intervals, so that water can be blocked. A fluid impermeable material filled up to an intermediate portion of the height of the joint portion ,
It is characterized by
Further, the water-impervious structure of the joint between the structures of the present invention,
Allowing the displacement between the structures arranged across the joint, the water-impervious structure of the joint between the structures that block the joint water,
A water stop member formed by an elastic member, both ends of which are fixed to the structure straddling the joint portion, permitting displacement between the structures and water-blocking the joint portion,
The joint portion between the water blocking members, in which the water blocking members are fixed at intervals, is filled to a height capable of blocking water at the bottom of the water blocking member displaced with respect to the maximum displacement between the structures. And a fluid impermeable material,
The water blocking member includes a plate-shaped water blocking member formed in a bellows shape, or an extra length portion configured by a cylindrical water blocking member connecting a plurality of cylindrical portions,
A wraparound prevention member for preventing wraparound of the fluid impermeable material to the extra length portion is provided,
It is characterized by

前記止水部材の前記間隔の少なくとも一方の外側に、外側からの圧力に抗して前記止水部材を保護する目地材を設置することが好ましい。 It is preferable that a joint material that protects the water blocking member against pressure from the outside is provided outside at least one of the intervals of the water blocking member.

前記止水部材の外側と前記目地材との間に、前記構造物間の最大変位に対して変位した前記止水部材の底部を浸漬させた状態として遮水できる前記目地部の高さの中間部まで前記流動性遮水材を充填することが好ましい。 Between the outer side of the water blocking member and the joint material, the middle of the height of the joint part capable of blocking water with the bottom part of the water blocking member displaced relative to the maximum displacement between the structures being immersed It is preferable to fill the fluid impermeable material up to a portion .

前記止水部材の前記間隔の少なくとも一方の外側に、外側からの圧力に抗して前記止水部材を保護する目地材を設置し、
前記止水部材の外側と前記目地材との間に、前記構造物間の最大変位に対して変位した前記止水部材の底部を浸漬させた状態として遮水できる前記目地部の高さの中間部まで前記流動性遮水材を充填し、
前記止水部材は、余長部を備え、前記余長部への前記流動性遮水材の回り込みを防止する回り込み防止部材が設けられていることが好ましい。 Outside at least one of the intervals of the water blocking member, a joint material is installed to protect the water blocking member against pressure from the outside,
Between the outer side of the water blocking member and the joint material, the middle of the height of the joint part capable of blocking water with the bottom part of the water blocking member displaced relative to the maximum displacement between the structures being immersed Fill the fluid impermeable material up to the part,
It is preferable that the water blocking member includes an extra length portion, and a wraparound prevention member that prevents the flowable water-impervious material from wrapping around the extra length portion is provided.

本発明によれば、想定される地震動に対して遮水性を確保することができる。 According to the present invention, it is possible to secure water impermeability against an assumed earthquake motion.

本発明の構造物間の目地部の遮水構造の一実施の形態にかかる平面図および横断面図である。1 is a plan view and a cross-sectional view according to an embodiment of a water-impervious structure for joints between structures according to the present invention. 本発明の一実施の形態にかかる止水部材の拡大平面図であり、（ａ）は平時の状態を、（ｂ）は地震発生後の変位状態をそれぞれ示す。It is an enlarged plan view of the water blocking member concerning one embodiment of the present invention, (a) shows a state at the time of normal, and (b) shows a displacement state after an earthquake, respectively. 本発明の一実施の形態の回り込み防止部材にかかり、（ａ）は概略斜視図、（ｂ）は平面図である。FIG. 4A is a schematic perspective view and FIG. 6B is a plan view of the wraparound prevention member according to the embodiment of the present invention. 本発明の一実施の形態の他の回り込み防止部材にかかり、（ａ）は平面図、（ｂ）は（ａ）中のＡ−Ａ断面図である。FIG. 4A is a plan view and FIG. 8B is a cross-sectional view taken along the line AA in FIG. 本発明の一実施の形態の回り込み防止部材にかかる平面図である。FIG. 3 is a plan view of a wraparound prevention member according to an embodiment of the present invention. 本発明の他の一実施の形態にかかる平面図および横断面図である。It is the top view and cross-sectional view concerning other one embodiment of the present invention. 本発明の他の一実施の形態にかかる目地材の平面図である。It is a top view of the jointing material concerning other one embodiment of the present invention.

以下、本発明の実施の形態について図面を参照して詳細に説明する。
本発明の構造物間の目地部の遮水構造１００は、構造物であるケーソン１，１間の目地部２に適用され、目地部２を遮水するものであり、１次許容量の変位、例えば１００ｍｍ程度の変位であるレベル１地震動のみならず、１次許容量の変位を越えたレベル２地震動による変位、例えば最大５００〜１０００ｍｍ程度の変位量を許容し、遮水し、あるいは遮水工を短期間で修復できる為の構造とするものである。
本発明の構造物間の目地部の遮水構造１００は、目地部２を挟んで配置されたケーソン１，１間の変位を許容し、目地部２を遮水するケーソン１，１間の目地部２の遮水構造１００であって、弾性部材によって形成されて目地部２を跨いでケーソン１，１に両端部が固定され、ケーソン１，１間の変位を許容して目地部２を遮水する止水部材としての目地材１０と、目地材１０が間隔をあけて固定された目地材１０，１０間の目地部２に、ケーソン１，１間の最大変位に対して変位した目地材１０の底部を遮水できる高さまで充填された流動性遮水材２０と、を備えて構成される。
なお、ケーソン１，１としては、コンクリート製、鋼製、これらを組み合わせたハイブリッド製などのケーソンに限らず、Ｌ型ブロックやセルラーブロックなどであっても良い。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The water-impervious structure 100 for joints between structures according to the present invention is applied to the joints 2 between the caisson 1, 1 which is a structure, and blocks the joints 2 with water. For example, not only the level 1 seismic motion with a displacement of about 100 mm, but also the displacement due to the level 2 seismic motion exceeding the displacement of the primary permissible amount, for example, a displacement of up to about 500 to 1000 mm is allowed, and water is blocked or water is blocked. The structure is such that the work can be restored in a short period of time.
A water-impervious structure 100 for joints between structures according to the present invention allows displacement between the caissons 1 and 1 arranged with the joint 2 interposed therebetween, and joints between the caissons 1 and 1 that shield the joint 2 from water. A water-impervious structure 100 for a portion 2, which is formed of an elastic member and has both ends fixed to the caisson 1, 1 straddling the joint portion 2, and allows displacement between the caisson 1, 1 to shield the joint portion 2. A joint material 10 as a water-stopping member for water and a joint portion 2 between the joint materials 10 and 10 in which the joint material 10 is fixed at an interval are displaced to the maximum displacement between the caissons 1 and 1. And a fluid impermeable material 20 filled up to a height capable of impermeable water.
Note that the caisson 1, 1 is not limited to a caisson made of concrete, steel, a hybrid of these, or the like, and may be an L-shaped block or a cellular block.

目地材（止水部材）１０が設けられる構造物としてのケーソン１，１には、目地部２を挟んで対向する端面１ａ，１ａに上下方向に沿って目地材取付溝３，３が形成してある。目地材取付溝３，３には、それぞれ狭幅の開口部３ａ，３ａが設けられるとともに、内部に空間３ｂ，３ｂが形成される。
目地材取付溝３，３は、例えば図２に示すように、ケーソン１の端面１ａに横断面が矩形の凹部４として形成される。矩形の凹部４には、その開口を２枚の板材５で塞ぐようにして狭い幅の開口部３ａと内部の空間３ｂが形成されている。さらに、開口部３ａ，３ａには、板材５の開口側端部に丸棒５ａが溶接などで取り付けてある。これにより、目地材１０と円弧面で接触するようにして接触による損傷を防止する。
なお、板材５の開口側端部に丸棒を溶接するのに代えて円弧状に加工（Ｒ加工）するようにしても良く、面取りだけで済ませても良い。 In the caisson 1, 1 as a structure in which the joint material (water stop member) 10 is provided, the joint material mounting grooves 3, 3 are formed in the end faces 1a, 1a facing each other across the joint portion 2 along the vertical direction. There is. The joint material mounting grooves 3 and 3 are provided with narrow openings 3a and 3a, respectively, and spaces 3b and 3b are formed inside.
For example, as shown in FIG. 2, the joint material mounting grooves 3 and 3 are formed in the end surface 1a of the caisson 1 as a concave portion 4 having a rectangular cross section. An opening 3a having a narrow width and an internal space 3b are formed in the rectangular recess 4 so as to close the opening with two plate members 5. Further, a round bar 5a is attached to the openings 3a, 3a by welding or the like at the opening-side end of the plate member 5. As a result, the joint material 10 is brought into contact with the arc surface to prevent damage due to the contact.
Instead of welding the round bar to the end of the plate member 5 on the opening side, it may be processed into an arc shape (R processing) or may be chamfered only.

なお、この目地材取付溝３は、開口部３ａが狭幅で内部に空間３ｂが形成されるものであれば、その横断面形状は、矩形に限らず円形など他の形状であっても良い。また、開口部３ａがケーソン１の端面１ａ上に位置し、空間３ｂがケーソン１内に配置される場合に限らず、鋼材などで構成した別体の目地材取付溝をケーソン１の端面１ａから突き出すように取り付けても良い。 The joint material mounting groove 3 is not limited to a rectangular cross section but may be another shape such as a circle as long as the opening 3a is narrow and the space 3b is formed therein. .. Further, the opening 3a is not only located on the end surface 1a of the caisson 1 and the space 3b is located inside the caisson 1, but a separate joint material mounting groove made of steel or the like is provided from the end surface 1a of the caisson 1. You may attach it so that it may stick out.

目地材取付溝３は、ケーソン１の端面１ａの大きさにもよるが、例えば、海側と廃棄物投入側との間などの２箇所に間隔をあけてそれぞれ設けられ、これにより、２箇所に目地材１０が施工される。
なお、目地材取付溝３は、間隔をあけた２箇所だけでなく、さらに２箇所設けて４箇所としても良く、目地材取付溝３に取り付ける目地材１０は、必ずしも同一仕様のものでなくとも想定される変位を許容できるものであれば良い。この場合、目地材同士の間隔が空いていればよく、例えば目地材取付溝を使用しない目地材を採用してもよい。 The joint material mounting groove 3 depends on the size of the end surface 1a of the caisson 1, but is provided at two places, for example, between the sea side and the waste input side, with a space between each, so that the two places are provided. The joint material 10 is constructed.
It should be noted that the joint material mounting groove 3 may be provided not only at two spaced locations but also at two more locations to form four locations, and the joint material 10 mounted in the joint material mounting groove 3 does not necessarily have the same specifications. Anything is acceptable as long as it allows the assumed displacement. In this case, it suffices that there is a space between the jointing materials, and for example, a jointing material which does not use the jointing material mounting groove may be adopted.

なお、ケーソン１，１の対向する目地材取付溝３，３は、完全に直線状に対向させる必要はなく、目地材１０の大きさなどによって異なるが、目地材１０を挿着できる程度の角度の違いが生じて対向する状態であっても良い。 The facing joint material mounting grooves 3 and 3 of the caissons 1 and 1 do not have to be completely linearly opposed to each other, and the angle is such that the jointing material 10 can be inserted, although it depends on the size of the jointing material 10. It may be in a state of facing each other due to the difference.

目地材１０は、例えば図２に示すように、対向するケーソン１，１の端面１ａ，１ａの目地材取付溝３，３の間に取り付けられる。目地材１０は、ゴムや合成樹脂などの可撓性材料で作られる。目地材１０は、その可撓性および形状効果で想定した許容変位に追随できるようにしてある。なお、目地材１０は、必要に応じて可撓性材料の内部に補強材が入れられて外部を可撓性材料とした補強構造が採られたものが用いられる。
目地材１０は、例えば図２に示すように、１次止水部材１１と２次止水部材１２とで構成され、両端部に目地材取付溝３に取り付ける取付部１１ａ，１１ａ、１２ｂ，１２ｂを備える。目地材１０は、取付部１１ａ，１１ａ，１２ｂ，１２ｂの中間部に伸縮により変位を許容する余長部１２ａ（１次止水部材１１の余長部は、図示せず）が、例えば蛇腹状に形成されて連結された板状止水部材として設けられる。余長部１２ａは、目地部２に配置され、目地部２の変位に追随してシール状態を保持する。 The joint material 10 is mounted between the joint material mounting grooves 3 and 3 of the end surfaces 1a and 1a of the caissons 1 and 1 which oppose each other, as shown in FIG. 2, for example. The joint material 10 is made of a flexible material such as rubber or synthetic resin. The joint material 10 can follow the permissible displacement assumed by its flexibility and shape effect. It should be noted that the joint material 10 has a structure in which a reinforcing material is put inside the flexible material and the outside is made of the flexible material, if necessary.
As shown in FIG. 2, for example, the joint material 10 is composed of a primary water blocking member 11 and a secondary water blocking member 12, and the mounting portions 11a, 11a, 12b, 12b mounted on the joint material mounting groove 3 at both ends. Equipped with. The joint material 10 has, for example, a bellows-shaped extra length portion 12a (the extra length portion of the primary water blocking member 11 is not shown) that allows displacement by expansion and contraction in the middle portion of the mounting portions 11a, 11a, 12b, 12b. It is provided as a plate-shaped water blocking member that is formed and connected to. The extra length portion 12a is disposed in the joint portion 2, and follows the displacement of the joint portion 2 to maintain the sealed state.

本実施形態の目地材１０は、想定される地震動に対し、１次許容量としてのレベル１地震動の変位量に追随する１次止水部材１１と、１次許容量の変位を越えるレベル２地震動の変位量に追随する２次止水部材１２と、で構成される。１次止水部材１１は、２次止水部材１２と独立して固定されて構成される。
そして、レベル１地震動までは、図示しない余長部を有する１次止水部材１１で変位を許容して土砂，廃棄物，保有水，遮水材などの漏洩を防止する。同時に、１次止水部材１１は、２次止水部材１２の余長部１２ａの変位を規制するよう構成してある。
一方、レベル１地震動の変位量を越える変位量に対しては、１次止水部材１１は破断され、２次止水部材１２の余長部１２ａにより変位を許容可能とし、漏洩を防止するよう構成してある。
これにより、レベル１地震動に対して目地材１０は、１次止水部材１１によってケーソン１，１間の目地部２からの廃棄物および保有水などの漏洩を防止する。レベル２地震動に対して目地材１０は、２次止水部材１２によってケーソン１，１などの構造物（護岸）自体は変形しても廃棄物海面処分場内の廃棄物および保有水や遮水材が目地部２から外部に漏洩（流出あるいは浸出）しないようにする。
本実施形態では、想定される地震動としてレベル１地震動に対しては、例えば、相対変位量を１００〜２００ｍｍの範囲と想定し、レベル２地震動に対しては、例えば、相対変位量を最大７５０ｍｍと想定する（図２（ｂ）参照）。 The joint material 10 of the present embodiment includes a primary water blocking member 11 that follows a displacement amount of a level 1 seismic motion as a primary allowable amount, and a level 2 seismic motion that exceeds a displacement of a primary allowable amount with respect to an expected earthquake motion. And a secondary water blocking member 12 that follows the displacement amount of. The primary water blocking member 11 is fixed and configured independently of the secondary water blocking member 12.
Up to the level 1 seismic motion, displacement is allowed by the primary water blocking member 11 having an extra length portion (not shown) to prevent leakage of earth and sand, waste, retained water, water blocking material, and the like. At the same time, the primary water blocking member 11 is configured to regulate the displacement of the extra length portion 12 a of the secondary water blocking member 12.
On the other hand, when the displacement exceeds the displacement of the level 1 seismic motion, the primary water blocking member 11 is broken and the extra length 12a of the secondary water blocking member 12 allows the displacement to prevent leakage. Configured.
As a result, the jointing material 10 prevents leakage of wastes and retained water from the joint portion 2 between the caissons 1 and 1 by the primary water blocking member 11 against the level 1 earthquake motion. For level 2 seismic motion, jointing material 10 is waste even if the structure (revetment) itself such as caisson 1, 1 is deformed by secondary water blocking member 12 Waste in the sea surface disposal site and retained water and water blocking material Are not leaked (flowed out or leached) from the joint portion 2 to the outside.
In the present embodiment, it is assumed that the relative displacement amount is, for example, in the range of 100 to 200 mm for the level 1 earthquake motion as the assumed earthquake motion, and the maximum relative displacement amount is 750 mm for the level 2 earthquake motion. Assume (see FIG. 2(b)).

目地材１０を構成する１次止水部材１１は、弾性素材によってシート状に形成されており、弾性素材の可撓性および／または図示しない伸縮する余長部などの形状効果によりレベル１地震動の変位量を許容することができるように構成してある。目地材１０では、１次止水部材１１に、必要に応じて弾性素材の内部に補強材が入れられて外部を弾性素材とした補強構造が採られたものが用いられる。
１次止水部材１１は、例えば、図２に示すように、両端部に目地材取付溝３に取り付ける取付部１１ａ，１１ａを備える。
取付部１１ａは、挿し込み固定金具６にボルト・ナット７を介して取り付けるための取付孔が所定の間隔で形成してある。取付部１１ａは、補強材で補強する。
１次止水部材１１は、取付部１１ａ，１１ａの中間部に図示しない伸縮する余長部が一体に連結して設けられる。余長部は、目地部２に配置され、レベル１地震動までの変位量に追随してシール状態を保持する。
なお、１次止水部材１１の余長部は、レベル１地震動までの変位量に追随できれば良く、その形状は、特に限定するものでなく、蛇腹状や折り返し状などこれまでの止水部材に採用されている形状を採用することができる。
また，伸縮性の十分に大きい部材であれば、余長部を設けなくとも良い。 The primary water blocking member 11 constituting the joint material 10 is formed of an elastic material in a sheet shape, and the flexibility of the elastic material and/or the shape effect such as a stretchable extra length portion (not shown) causes a level 1 seismic motion. The displacement amount is allowed. In the joint material 10, the primary water blocking member 11 has a reinforcing structure in which a reinforcing material is put inside the elastic material and the outside is an elastic material as needed.
For example, as shown in FIG. 2, the primary water blocking member 11 has mounting portions 11 a and 11 a mounted on the joint material mounting groove 3 at both ends.
The mounting portion 11a is formed with mounting holes for mounting the insertion fixing metal fitting 6 via the bolts and nuts 7 at predetermined intervals. The mounting portion 11a is reinforced with a reinforcing material.
The primary water shutoff member 11 is provided with an extra length portion (not shown) that expands and contracts integrally connected to an intermediate portion between the mounting portions 11a and 11a. The extra length portion is arranged in the joint portion 2 and keeps the sealed state by following the displacement amount up to the level 1 earthquake motion.
It should be noted that the extra length of the primary water blocking member 11 is only required to be able to follow the amount of displacement up to the level 1 seismic motion, and the shape thereof is not particularly limited, and it may be a bellows shape, a folded shape, or the like. The adopted shape can be adopted.
Further, as long as the member is sufficiently stretchable, the extra length portion may not be provided.

目地材１０では、１次止水部材１１は、２次止水部材１２の少なくとも一方側に設けられる。すなわち、２次止水部材１２を変位させる力が加わる上流側、または上流側および下流側の両側に設けられる。
１次止水部材１１を２次止水部材１２の少なくとも一方側を覆って設けることで、想定した１次許容量であるレベル１地震動までの変位量の範囲では、直接変位を生じさせる力が２次止水部材１２に加わらないようにし、２次止水部材１２に変位が生じないように規制する。
例えば、ケーソン１，１の海側Ｓや埋立側Ｅの側面に目地材１０を配置する場合には、２次止水部材１２の外側（変位させる力が加わる上流側）となる海側Ｓや埋立側Ｅに１次止水部材１１を配置して２次止水部材１２を覆うようにする。
一方、目地部２の中間部に目地材１０を配置する場合には、両側から変位を生じさせる力が加わることから２次止水部材１２の両側に１次止水部材１１を配置して両側を覆うようにする。 In the joint material 10, the primary water blocking member 11 is provided on at least one side of the secondary water blocking member 12. That is, it is provided on the upstream side where a force for displacing the secondary water blocking member 12 is applied, or on both sides of the upstream side and the downstream side.
By providing the primary water shut off member 11 so as to cover at least one side of the secondary water shut off member 12, in the range of the amount of displacement up to the level 1 seismic motion, which is the assumed primary allowable amount, the force that directly causes displacement is generated. The secondary water blocking member 12 is prevented from being applied, and the secondary water blocking member 12 is regulated so as not to be displaced.
For example, when arranging the joint material 10 on the sea side S of the caisson 1, 1 or the side surface of the landfill side E, the sea side S which is the outer side of the secondary water blocking member 12 (the upstream side to which a displacement force is applied) or The primary water blocking member 11 is arranged on the landfill side E so as to cover the secondary water blocking member 12.
On the other hand, when arranging the joint material 10 in the middle portion of the joint portion 2, a force for causing displacement is applied from both sides, so that the primary water blocking members 11 are arranged on both sides of the secondary water blocking member 12 and both sides are arranged. To cover.

２次止水部材１２は、弾性素材によってシート状に形成されている。２次止水部材１２は、目地部２を跨いで配置され、両端部が隣接する構造物であるケーソン１，１に、例えば、目地材取付溝３を介して固定される。２次止水部材１２は、構造物であるケーソン１，１間のレベル２地震動による変位を許容して漏洩を防止する余長部１２ａを有している。
これにより、構造物であるケーソン１，１が、レベル２地震動によって護岸自体が損傷したとしても、余長部１２ａによって相対変位量を最大７５０ｍｍ（総変位量は、１５００ｍｍ）としているので、ケーソン１，１などの護岸の内側の廃棄物および保有水や遮水材などの流出（漏洩）を防止することができる。 The secondary water blocking member 12 is formed of an elastic material in a sheet shape. The secondary water blocking member 12 is arranged so as to straddle the joint portion 2, and is fixed to the caisson 1, 1 which is a structure having both end portions adjacent to each other, for example, through the joint material mounting groove 3. The secondary water blocking member 12 has an extra length portion 12a that allows displacement due to Level 2 seismic motion between the caisson 1, 1 that is a structure to prevent leakage.
As a result, the caisson 1, 1, which is a structure, has a maximum relative displacement of 750 mm (total displacement of 1500 mm) due to the extra length portion 12a even if the revetment itself is damaged by level 2 seismic motion. , 1 etc. inside the revetment and outflow (leakage) of retained water or water blocking material can be prevented.

２次止水部材１２は、例えば、図２に示すように、余長部１２ａを備え、両端部に目地材取付溝３に取り付ける取付部１２ｂ，１２ｂを備える。
取付部１２ｂには、挿し込み固定金具６にボルト・ナット７を介して取り付けるための取付孔が所定の間隔で形成してある。取付部１２ｂは、補強材で補強してあり、１次止水部材１１の取付部１１ａと重ねて挿し込み固定金具６にボルト・ナット７で取り付けられる。
こうすることで、２次止水部材１２の取付部１２ｂに１次止水部材１１の取付部１１ａを介して変位させようとする力が加わることがなく、それぞれを独立して変位させることができる。 As shown in FIG. 2, for example, the secondary water blocking member 12 includes an extra length portion 12a and mounting portions 12b and 12b mounted on the joint material mounting groove 3 at both ends.
Mounting holes are formed in the mounting portion 12b at predetermined intervals for mounting the insertion fixing metal fitting 6 via the bolts and nuts 7. The mounting portion 12b is reinforced with a reinforcing material, and is inserted over the mounting portion 11a of the primary water blocking member 11 and attached to the fixing bracket 6 with bolts and nuts 7.
By doing so, a force for displacing the mounting portion 12b of the secondary water blocking member 12 via the mounting portion 11a of the primary water blocking member 11 is not applied, and each can be independently displaced. it can.

２次止水部材１２は、取付部１２ｂ，１２ｂの中間部に余長部１２ａが一体に連結して設けられる。余長部１２ａは、例えば、目地部２に配置され、想定されるレベル２地震動による変位量に追随してシール状態を保持する。
なお、２次止水部材１２の余長部１２ａは、例えば、図２に示すように、蛇腹型等としてレベル２地震動の変位量に追随できる長さを備えて構成される。そして、余長部１２ａを備えた２次止水部材１２の両端部の取付部１２ｂの間隔が目地材取付溝３，３の間隔に合わせて形成してある。
目地材１０は、長手方向には、ケーソン１の高さに応じた必要な長さに形成され、複数枚の可撓性材料のシートを接着などで連結することで製造される。
なお、目地材１０は、吊り上げて挿し込むなどの施工の必要に応じ、施工後切断する部分を上端部に設けておく。目地材１０は、長手方向に分割しておき、これを連結して取り付けるようにしても良い。 The secondary water blocking member 12 is provided with an extra length portion 12a integrally connected to an intermediate portion between the mounting portions 12b and 12b. The extra length part 12a is arrange|positioned at the joint part 2, for example, and follows the assumed amount of displacement by a level 2 earthquake motion, and maintains a sealing state.
The extra length portion 12a of the secondary water blocking member 12 is, for example, as shown in FIG. 2, configured as a bellows type or the like with a length that can follow the displacement amount of the level 2 seismic motion. The intervals between the mounting portions 12b at both ends of the secondary water blocking member 12 having the extra length portion 12a are formed to match the intervals between the joint material mounting grooves 3 and 3.
The joint material 10 is formed to have a required length according to the height of the caisson 1 in the longitudinal direction, and is manufactured by connecting a plurality of sheets of flexible material by bonding or the like.
In addition, the joint material 10 is provided with a portion to be cut after the construction at the upper end portion as necessary for construction such as lifting and inserting. The joint material 10 may be divided in the longitudinal direction and then connected and attached.

目地部２の底部については、目地材１０の１次止水部材１１や２次止水部材１２の下端部、少なくとも２次水部材１２の下端部に変形に追随する弾性体等の袋状の遮水部を取り付けるようにし、その弾性体の遮水部を目地材１０の自重により押し付けるようにして追随させることで遮水する。
また、１次止水部材１１や２次止水部材１２の下端部に弾性体やブラシなどを設けることにより、レベル１地震動およびレベル２地震動の目地材１０の変位に対しても対応するようにしても良い。
さらに、図１に示したように、深層混合処理工法により改良された地盤上のトレンチ部８内にケーソン１を設置する場合には、目地材１０の下端部に弾性体やブラシなどを設けることなく、トレンチ部８内の遮水材９を充填することによって遮水する。
この遮水材９は、流動性遮水材２０と同一の材料を充填するようにしても良い。
なお、異なる材料を用いる場合は、流動速度が速いものを充填するが、流動速度は流動性遮水材２０と同一でなくても良い。
このような目地材１０によって、レベル１地震動による変位量およびレベル２地震動の大きな変位量に対しても目地材１０が瞬時に応答して伸長され、遮水性を確保することができる。
一方、これまでの２つの目地材間の目地部に目地部遮水材としてアスファルトマスチックなど充填して構成した遮水構造では、目地部遮水材の変位に対する追随速度が遅く、遮水性を確保することが困難であったが、本願の目地材１０によれば、地震などによる地盤変動や不等沈下などによって目地部２の間隔が変位しても土砂、廃棄物、保有水、遮水材などの流出を防止して遮水することができるのである。
なお、目地材１０は、レベル２地震動を、想定する地震動とする場合、１次止水部材１１を省略した２次止水部材１２だけで構成するようにしても良い。 The bottom portion of the joint portion 2 has a bag-like shape such as an elastic body that follows deformation at the lower end portions of the primary water blocking member 11 and the secondary water blocking member 12 of the joint material 10, at least the lower end portion of the secondary water member 12. The water impermeable part is attached, and the water impermeable part of the elastic body is pressed by the weight of the joint material 10 to follow the water impermeable part, thereby impermeable to water.
Further, by providing an elastic body, a brush or the like at the lower end portions of the primary water blocking member 11 and the secondary water blocking member 12, it is possible to cope with the displacement of the joint material 10 due to the level 1 seismic motion and the level 2 seismic motion. May be.
Further, as shown in FIG. 1, when the caisson 1 is installed in the trench portion 8 on the ground improved by the deep layer mixing processing method, an elastic body or a brush is provided at the lower end portion of the joint material 10. Instead, water is blocked by filling the water blocking material 9 in the trench portion 8.
The water-blocking material 9 may be filled with the same material as the fluid water-blocking material 20.
When different materials are used, those having a high flow rate are filled, but the flow rate does not have to be the same as that of the fluid impermeable material 20.
With such a joint material 10, the joint material 10 instantly expands in response to a large displacement amount of the level 1 seismic motion and a large displacement amount of the level 2 seismic motion, and the water shielding property can be secured.
On the other hand, in the water-impervious structure that was constructed by filling asphalt mastic as a joint water-blocking material in the joint between the two joint materials up to now, the follow-up speed against the displacement of the joint water-blocking material is slow and the water-blocking property is secured. However, according to the joint material 10 of the present application, even if the space between the joint portions 2 is displaced due to ground movement or uneven subsidence due to an earthquake or the like, earth, sand, waste, retained water, and water blocking material. It is possible to prevent the outflow of water and block water.
When the level 2 seismic motion is assumed to be the seismic motion, the joint material 10 may be composed of only the secondary water blocking member 12 without the primary water blocking member 11.

さらに、本発明の構造物間の目地部の遮水構造１００では、目地材１０自体の構造による底部の遮水とは別に、例えば図１に示すように、目地材１０が間隔をあけて固定された目地材１０，１０間の目地部２に、ケーソン１，１間の最大変位に対して、変位した目地材１０の底部を遮水できる高さまで流動性遮水材２０が充填されて構成されている。すなわち、レベル２地震動による大きな変位が生じた場合でも、図２に示すように、流動性遮水材２０の流動性により、目地材１０の底部の遮水性を確保するようにしている。 Further, in the water-impervious structure 100 for joints between structures according to the present invention, apart from the water-impermeability of the bottom portion due to the structure of the joint material 10 itself, the joint material 10 is fixed at intervals as shown in FIG. 1, for example. The joint portion 2 between the joint materials 10 and 10 is filled with the fluid impermeable material 20 up to a height at which the bottom of the displaced joint material 10 can be shielded against the maximum displacement between the caissons 1 and 1. Has been done. That is, even if a large displacement occurs due to the level 2 earthquake motion, as shown in FIG. 2, the fluidity of the fluid water-impervious material 20 ensures water impermeability of the bottom of the joint material 10.

流動性遮水材２０は、地震動による大きな変位に対しても遮水性を発揮する必要があり、これまでの中詰材や目地部遮水材等に比べて流動性の高いものが用いられる。
流動性遮水材２０は、例えばアスファルト系、土質系、ケミカル系などの流動性のある遮水材が用いられる。具体的な流動性遮水材２０としては、例えば、アスファルトペーストを挙げることができる。
流動性遮水材２０は、図１に示すように、平時の遮水性を確保するものであり、変位が生じた場合、特に大きな変位が生じた場合の、遮水性を確保するものであることから、ケーソン１，１に最大変位が生じた場合に、目地部２の目地材１０，１０の間の目地部２を遮水できる充填量であれば良く、目地材１０，１０の底部を遮水できる高さまで予め充填される。
すなわち、ケーソン１，１の目地部２に想定される地震動による最大変位が生じた場合に、目地材１０，１０の下端部が流動性遮水材２０中に浸漬した状態となる量としてある。
こうすることで、ケーソン１，１が捨石マウンド上に設置される場合やトレンチ部８内に設置され、遮水材９が充填されている場合のいずれであっても目地材１０の底部を遮水することができる。 The flowable water-impervious material 20 is required to exhibit water impermeability even with a large displacement due to an earthquake motion, and a material having high fluidity is used as compared with the conventional filling materials and joint water-impermeable materials.
As the fluid impermeable material 20, for example, an asphalt-based, soil-based, or chemical-based fluid impermeable material is used. Specific examples of the fluid water-blocking material 20 include asphalt paste.
As shown in FIG. 1, the fluid water-impervious material 20 ensures water impermeability under normal conditions, and ensures water impermeability when a displacement occurs, particularly when a large displacement occurs. Therefore, when the caisson 1, 1 is subjected to the maximum displacement, the filling amount may be such that the joint portion 2 between the joint materials 10 and 10 of the joint portion 2 can be water-blocked, and the bottom portions of the joint materials 10 and 10 are blocked. It is pre-filled to a height that allows water.
That is, when the maximum displacement due to the expected earthquake motion occurs in the joint portion 2 of the caisson 1, 1, the lower end portion of the joint material 10, 10 is immersed in the fluid impermeable material 20.
By doing so, the bottom of the joint material 10 is shielded regardless of whether the caisson 1, 1 is installed on the rubble mound or installed in the trench portion 8 and filled with the water blocking material 9. Can be watered.

目地材１０は、流動性遮水材２０の余長部１２ａの蛇腹部分に流動性遮水材２０が入り込むと、余長部１２ａが円滑に、変位に対応することができなくなる場合があることから、流動性遮水材２０が充填される高さまで、図３に示すように、回り込み防止部材１３が設けられる。
回り込み防止部材１３は、例えば、帯状の側部防止材１３ａと、スポンジなどの塊状の底部防止材１３ｂとで構成され、目地材１０の余長部１２ａの蛇腹部分の空間に塊状の底部防止材１３ｂを配置し、余長部１２ａの外側を帯状の側部防止材１３ａを配置して構成される。この回り込み防止部材１３では、帯状の側部防止材１３ａは流動性遮水材２０の充填高さまで必要とされるが、塊状の底部防止材１３ｂは、底部からの流動性遮水材２０の流入を防止できる厚さがあれば良い。回り込み防止部材１３は、両面テープや接着剤などで所々が固定され、目地材１０の伸縮に支障がないように取り付けられる。
また、回り込み防止部材１３は、少なくとも目地材１０の流動性遮水材２０と接触する側に取り付ければ良く、目地材１０の両側に流動性遮水材２０が充填される場合（図６参照）には、図３（ｂ）に示したように、両側に回り込み防止部材１３を取り付けるようにする。 In the joint material 10, if the fluid impermeable material 20 enters the bellows portion of the extra length portion 12a of the fluid impermeable material 20, the extra length portion 12a may not be able to smoothly cope with the displacement. As shown in FIG. 3, the wraparound preventing member 13 is provided from the above to the height at which the fluid impermeable material 20 is filled.
The wraparound prevention member 13 is composed of, for example, a strip-shaped side prevention member 13a and a lump-shaped bottom prevention member 13b such as a sponge, and the lump-shaped bottom prevention member is provided in the space of the bellows portion of the extra length portion 12a of the joint material 10. 13b is arranged, and a band-shaped side part prevention member 13a is arranged outside the extra length part 12a. In this wraparound prevention member 13, the belt-shaped side portion prevention material 13a is required up to the filling height of the fluid impermeable material 20, but the block-shaped bottom portion prevention material 13b inflows the fluid impermeable material 20 from the bottom portion. It is enough if there is a thickness that can prevent this. The wraparound prevention member 13 is fixed in places with a double-sided tape or an adhesive, and is attached so as not to hinder the expansion and contraction of the joint material 10.
Further, the sneaking-in prevention member 13 may be attached at least on the side of the joint material 10 that comes into contact with the fluid water blocking material 20, and when the fluid water blocking material 20 is filled on both sides of the joint material 10 (see FIG. 6 ). In this case, as shown in FIG. 3B, the wraparound preventing members 13 are attached to both sides.

なお、回り込み防止部材１３は、上記のように、側部防止材１３ａと底部防止材１３ｂとを別に製作し、取り付ける場合に限らず、側部防止材１３ａと底部防止材１３ｂとを一体に成形しておき、一体とした回り込み防止部材１３を目地材１０に取り付けるようにしても良い。 The wraparound prevention member 13 is not limited to the case where the side prevention member 13a and the bottom prevention member 13b are separately manufactured and attached as described above, and the side prevention member 13a and the bottom prevention member 13b are integrally formed. Alternatively, the integrated wraparound prevention member 13 may be attached to the joint material 10.

回り込み防止部材１３Ａは、図４（ａ），（ｂ）に示すように、側部防止材１３ａと帯状の底部防止材１３ｃを連続させて、目地材１０の余長部１２ａの底部を側部と連続する帯状の底部防止材１３ｃで塞ぐようにしている。
特に、目地材１０の両側に流動性遮水材２０を充填する場合には、両側への回り込み防止部材１３Ａの取り付けが簡単にできる。
この回り込み防止部材１３Ａも流動性遮水材２０が充填される高さまで取り付けるようにすれば良い。 As shown in FIGS. 4(a) and 4(b), the wraparound prevention member 13A has a side portion prevention member 13a and a strip-shaped bottom portion prevention member 13c which are continuous with each other so that the bottom portion of the extra length portion 12a of the joint material 10 is a side portion. It is configured to be closed by a strip-shaped bottom portion prevention member 13c continuous with.
In particular, when the fluid water-blocking material 20 is filled on both sides of the joint material 10, the wraparound prevention members 13A can be easily attached to both sides.
This sneak-in prevention member 13A may also be attached up to a height at which the fluid impermeable material 20 is filled.

なお、回り込み防止部材１３では、帯状の側部防止材１３ａと塊状の底部防止材１３ｂとで構成し、回り込み防止部材１３Ａでは、側部防止材１３ａと底部防止材１３ｃを帯状（シート状）としたもので構成したが、回り込み防止部材１３をスポンジなどの塊状のものだけで構成し、図３で説明した底部防止材１３ｂを流動性遮水材２０の充填高さまで高く取り付けることで、目地材１０の余長部１２ａの側部及び底部への流動性遮水材２０の流入を防止するようにしても良い。 The wraparound prevention member 13 is composed of a band-shaped side prevention member 13a and a block-shaped bottom prevention member 13b. However, the sneaking-in prevention member 13 is formed only by a lump such as a sponge, and the bottom prevention material 13b described in FIG. The flowable water-impervious material 20 may be prevented from flowing into the side portion and the bottom portion of the extra length portion 12 a of the device 10.

回り込み防止部材１３Ｂは、図５に示すように、目地材１０の余長部１２ａの空間を極力小さくすることで、空間内に流動性遮水材２０が流入しないようにするものである。回り込み防止部材１３，１３Ａでは、目地材１０の余長部１２ａで形成される空間に流動性遮水材２０が流入しないように回り込み防止部材１３，１３Ａで余長部１２ａの側部及び底部の空間を塞ぐようにするものとは異なる。
回り込み防止部材１３Ｂは、目地材１０の余長部１２ａの蛇腹部分を重ねるように側部防止材１３ｄで押えて両端部を余長部１２ａの側部に固定することで余長部１２ａの蛇腹部分の先端を密着状態で保持している。
このような回り込み防止部材１３Ｂも流動性遮水材２０の充填高さまで取り付けるようにすれば良い。
このような回り込み防止部材１３Ｂによっても流動性遮水材２０の回り込みを防止することができ、目地材１０を地震動に対して円滑に変位させることができる。 As shown in FIG. 5, the wraparound prevention member 13B prevents the fluid water-blocking material 20 from flowing into the space by minimizing the space of the extra length portion 12a of the joint material 10. In the wraparound prevention members 13 and 13A, the wraparound prevention members 13 and 13A prevent the flowable water-impervious material 20 from flowing into the space formed by the extra length portion 12a of the joint material 10. It is different from the one that blocks the space.
The wraparound prevention member 13B is pressed by the side portion prevention member 13d so that the bellows portion of the extra length portion 12a of the joint material 10 is overlapped, and both ends are fixed to the side portions of the extra length portion 12a. The tip of the part is held in close contact.
Such a wraparound prevention member 13B may be attached up to the filling height of the fluid impermeable material 20.
Such a wraparound prevention member 13B can also prevent the fluid water-impervious material 20 from wrapping around, and the joint material 10 can be smoothly displaced with respect to an earthquake motion.

このように構成した構造物間の目地部の遮水構造１００によれば、ケーソン１，１間の目地部２に、間隔をあけて目地材１０，１０を目地材取付溝３に挿し込み固定金具６を介して挿し込むようにして設置する。目地材取付溝３の空間３ｂに膨張モルタルなどの充填材３ｃを充填して開口部３ａと目地材１０との間をシール状態とする。
この目地材１０の目地材取付溝３への挿し込み前に回り込み防止部材１３，１３Ａ，１３Ｂを予め取り付けておく。
この後、目地材１０，１０の間の目地部２に、流動性遮水材２０を目地材１０，１０に最大の変位が生じても目地材１０，１０の下端部が流動性遮水材２０に浸漬した状態となる所定の高さまで充填する。 According to the water-impervious structure 100 for the joints between the structures thus configured, the jointing materials 10, 10 are inserted into the jointing material mounting grooves 3 at fixed intervals in the jointing portion 2 between the caissons 1, 1 and fixed. It is installed by inserting it through the metal fitting 6. The space 3b of the joint material mounting groove 3 is filled with a filler 3c such as expanded mortar to make a seal between the opening 3a and the joint material 10.
Before the joint material 10 is inserted into the joint material mounting groove 3, the wraparound preventing members 13, 13A, 13B are attached in advance.
After that, even if the joint material 10, 10 has a maximum displacement in the joint portion 2 between the joint materials 10, 10, even if the joint material 10, 10 has the maximum displacement, the lower end portion of the joint material 10, 10 is the fluid impervious material. It is filled up to a predetermined height such that it is immersed in 20.

こうして構造物間の目地部の遮水構造１００が完成した状態で、レベル１地震動を越えるレベル２地震動が発生すると、目地材１０の１次止水部材１１は破断されるものの２次止水部材１２は、余長部１２ａが伸長され、止水性が保持される。これと同時に、２次止水部材１２の底部では、流動性遮水材２０がレベル２地震動に追随して流動し、２次止水部材１２の下端部を流動性遮水材２０に浸漬した状態とし、底部の遮水性を確保する。
これにより、想定した地震動、例えばレベル１地震動を越えるレベル２地震動に対して遮水性を確保することができる。 When the level 2 seismic motion exceeding the level 1 seismic motion occurs in the state where the water-impervious structure 100 at the joint between the structures is completed in this way, the primary water blocking member 11 of the joint material 10 is broken, but the secondary water blocking member is broken. 12, the extra length portion 12a is extended, and the waterproof property is maintained. Simultaneously with this, at the bottom of the secondary water blocking member 12, the fluid water blocking member 20 flows following the level 2 seismic motion, and the lower end of the secondary water blocking member 12 is immersed in the fluid water blocking member 20. And keep the bottom water shield.
As a result, it is possible to secure water impermeability against an assumed earthquake motion, for example, a level 2 earthquake motion exceeding the level 1 earthquake motion.

次に、本発明の他の実施の形態について、図６及び図７により説明するが、既に説明した構造物間の目地部の遮水構造１００と同一部分には、同一符号を記し、重複する説明は省略する。
本実施の形態の構造物間の目地部の遮水構造１００Ａでは、目地材１０，１０の間の目地部２に流動性遮水材２０を充填することで目地材１０，１０の底部の遮水性を確保するのに加え、目地材１０，１０の外側でも遮水性を確保するようにしている。
すなわち、目地材１０，１０の間隔の少なくとも一方の外側に、外側からの圧力に抗して目地材１０，１０を保護する目地材３０を設置して構成したり、これに加えて、目地材１０，１０の外側と目地材３０との間に、ケーソン１，１間の最大変位に対して変位した目地材１０，１０の底部を遮水できる高さまで流動性遮水材２０を充填して構成される。
目地材としては、大きな変位を許容する目地材３０や大きな変位までは許容しない後述する円筒状目地材３０Ａのいずれかが使用される。 Next, another embodiment of the present invention will be described with reference to FIGS. 6 and 7, and the same parts as the water-impervious structure 100 of the joint between the structures described above will be denoted by the same reference numerals and will be duplicated. The description is omitted.
In the water-impervious structure 100A for joints between structures according to the present embodiment, by filling the joint 2 between the joints 10, 10 with the fluid water-blocking material 20, the bottom of the joints 10, 10 is shielded. In addition to ensuring the water-repellent property, the water-impervious property is also ensured outside the joint materials 10, 10.
That is, the joint material 30, which protects the joint material 10 against the pressure from the outside, is installed outside at least one of the intervals of the joint material 10, 10, or in addition, Between the outer side of the joint material 10 and the joint material 30, the flowable impermeable material 20 is filled up to a height such that the bottom portion of the joint material 10, 10 displaced with respect to the maximum displacement between the caisson 1, 1 can be shielded. Composed.
As the joint material, one of the joint material 30 which allows a large displacement and the cylindrical joint material 30A described later which does not allow a large displacement is used.

目地材３０は、例えば図７に示すように、両端の取付部３１，３１の間に伸縮する余長部３２がシート状の可撓性材料を環状に接続した円筒状止水部材で構成されている。余長部３２は、環状の内部に中空部となる空間が形成される大環状部３２ａと、この大環状部３２ａの中央部にシート状の可撓性材料の中央部を重ねて連結するとともに、両端部を重ねて環状とされた小環状部３２ｂとで構成されている。
また、目地材３０の小環状部３２ｂの重ね合せ部分が一方の取付部３１とされ、大環状部３２ａの反対側の中央部に可撓性材料のシートを重ねて連結し、その端部が外側に突き出したもう一方の取付部３１とされる。そして、目地材３０は、長手方向には、ケーソン１の高さに応じた必要な長さに形成され、複数枚の可撓性材料のシートを接着などで連結することで製造される。
これにより、目地材３０は、想定される地震動として、例えばレベル２地震動に対する変位を許容する。
なお、目地材３０は、施工のため、施工後切断部が設けられる。
このように構成した目地材３０は、図６では、図示省略したが、既に説明した目地材１０と同様に、ケーソン１の目地材取付溝３に、挿し込み固定金具６を介してボルト・ナット７で取付部３１，３１が取り付けられて挿し込まれる。そして、目地材取付溝３の空間３ｂに膨張モルタルなどの充填材３ｃが充填されて開口部３ａがシールされる。
なお、目地材３０の目地材取付溝３への挿し込み前に、図６，７では図示省略したが、目地材１０と同様に、目地材３０の側部防止材１３ａと底部を塞ぐ底部防止材１３ｃとを備える回り込み防止部材１３Ａを予め取り付けておくようにしても良い。
また、目地材３０は、大環状部３２ａ内にアスファルトマスチックなどの中詰材３３が充填され、目地部２のケーソン１，１の表面に押し付けられてシール状態とされる。
こうして、１箇所の目地材１０の取付施工が完了する。 For example, as shown in FIG. 7, the joint material 30 is composed of a cylindrical water blocking member in which a sheet-shaped flexible material is annularly connected to an extra length portion 32 that expands and contracts between the attachment portions 31 and 31 at both ends. ing. The extra length portion 32 connects the large annular portion 32a in which a hollow space is formed inside the annular portion, and the central portion of the large annular portion 32a is overlapped with the central portion of the sheet-shaped flexible material. , And a small annular portion 32b in which both ends are overlapped to form an annular shape.
Further, the overlapping portion of the small annular portion 32b of the joint material 30 serves as one attachment portion 31, and the sheets of the flexible material are overlapped and connected to the central portion on the opposite side of the large annular portion 32a, and the ends thereof are The other mounting portion 31 is projected to the outside. The joint material 30 is formed in the longitudinal direction to have a required length according to the height of the caisson 1, and is manufactured by connecting a plurality of sheets of flexible material by adhesion or the like.
As a result, the joint material 30 allows, for example, displacement with respect to the level 2 seismic motion as the assumed seismic motion.
The joint material 30 is provided with a post-construction cutting portion for construction.
Although not shown in FIG. 6, the joint material 30 configured in this manner is similar to the joint material 10 already described, but is inserted into the joint material mounting groove 3 of the caisson 1 via the fixing metal fittings 6 and the bolts and nuts. The attachment portions 31 and 31 are attached and inserted at 7. The space 3b of the joint material mounting groove 3 is filled with a filler 3c such as expanded mortar to seal the opening 3a.
Although not shown in FIGS. 6 and 7 before inserting the joint material 30 into the joint material mounting groove 3, like the joint material 10, the side prevention member 13 a of the joint material 30 and the bottom prevention for closing the bottom portion are prevented. The wraparound prevention member 13A including the material 13c may be attached in advance.
Further, the joint material 30 is filled with a filling material 33 such as asphalt mastic in the large annular portion 32a and pressed against the surfaces of the caissons 1 and 1 of the joint portion 2 to be in a sealed state.
In this way, the attachment construction of the joint material 10 at one location is completed.

そして、目地材３０と目地材１０，１０との外側には、流動性遮水材２０が充填される。流動性遮水材２０は、既に説明した実施の形態と同様に、ケーソン１，１に最大変位が生じた場合に、目地部２の目地材３０と目地材１０，１０との間を遮水できる充填量であれば良く、目地材１０，１０の外側の底部を遮水できる高さまで充填される。
すなわち、ケーソン１，１の目地部２に想定される地震動による最大変位が生じた場合に、目地材３０と目地材１０，１０との下端部が流動性遮水材２０中に浸漬した状態となる量としてある。
こうすることで、ケーソン１，１が捨石マウンド上に設置される場合やトレンチ部８内に設置され、遮水材９が充填されている場合のいずれであっても目地材３０および目地材１０の底部を遮水することができる。 Then, the fluid impermeable material 20 is filled outside the joint material 30 and the joint materials 10, 10. Similar to the embodiment described above, the fluid impermeable material 20 is water-impermeable between the joint material 30 of the joint portion 2 and the joint material 10, 10 when the maximum displacement occurs in the caisson 1, 1. A filling amount that can be used is sufficient, and the bottom portion on the outer side of the joint material 10 is filled to a height at which water can be blocked.
That is, when the maximum displacement due to the expected seismic motion occurs in the joint portion 2 of the caisson 1, 1, the lower end portions of the joint material 30 and the joint material 10, 10 are immersed in the fluid impermeable material 20. It is as an amount.
By doing so, the joint material 30 and the joint material 10 are installed regardless of whether the caisson 1, 1 is installed on the rubble mound or installed in the trench portion 8 and filled with the water blocking material 9. The bottom of the can be blocked.

このような構造物間の目地部の遮水構造１００Ａによれば、平時においては、目地材１０，１０の外側に目地材３０，３０が配置されているので、海側Ｓからの波圧や埋立側Ｅからの土砂圧等の外力が目地材１０，１０に直接作用せず、目地材１０，１０を外圧から保護することができる。 According to the water-impervious structure 100A for joints between such structures, since the jointing materials 30, 30 are arranged outside the jointing materials 10, 10 in normal times, the wave pressure from the sea side S or The external force such as earth and sand pressure from the landfill side E does not directly act on the joint materials 10, 10 and the joint materials 10, 10 can be protected from the external pressure.

このような目地材１０，１０を波圧や土砂圧等から保護する場合には、目地材３０としては、本実施の形態で説明したようなレベル２地震動に対する許容変位を備えるもので構成する必要はなく、これまでの目地部遮水材を保持するための、例えば図６に示した目地材３０としての円筒状目地材３０Ａで構成すれば良い。すなわち、円筒状目地材３０Ａは、レベル２地震動などの想定する最大変位が生じるまでは、目地材１０，１０の保護と流動性遮水材２０の流出を防止するものとなり、レベル２地震動に対する遮水性のないものとなる。 When protecting the joint materials 10, 10 from wave pressure, earth and sand pressure, etc., it is necessary that the joint material 30 has a permissible displacement with respect to the level 2 seismic motion as described in the present embodiment. Instead, it may be constituted by, for example, a cylindrical joint material 30A as the joint material 30 shown in FIG. 6 for holding the joint water-impervious material. That is, the cylindrical joint material 30A protects the joint materials 10 and 10 and prevents outflow of the fluid water-blocking material 20 until the expected maximum displacement such as the level 2 seismic motion occurs, and the shielding against the level 2 seismic motion is performed. It will not be water-based.

一方、本実施の形態で説明した目地材３０のように、レベル２地震動に対する許容変位を備えるもので構成することで、想定する地震動がレベル２地震動の大きな変位が生じる場合でも、目地材３０，３０自体でも遮水性を確保できると同時に、目地材３０と目地材１０との間に充填した流動性遮水材２０によって目地材３０および目地材１０の底部を流動性遮水材２０に浸漬して遮水性保持することができる。
こうすることで、より一層確実にケーソン１，１間の目地部２の想定する地震動、例えばレベル２地震動に対する遮水性を確保することができる。 On the other hand, when the joint material 30 described in the present embodiment is configured to have a permissible displacement with respect to the level 2 seismic motion, even if the assumed seismic motion causes a large displacement of the level 2 seismic motion, the joint material 30, The water permeation can be ensured by 30 itself, and at the same time, the joint material 30 and the bottom of the joint material 10 are dipped in the fluid impermeable material 20 by the fluid impermeable material 20 filled between the joint material 30 and the joint material 10. It is possible to maintain water impermeability.
By doing so, it is possible to more reliably secure the water shield against the earthquake motion assumed by the joint 2 between the caissons 1 and 1, for example, the level 2 earthquake motion.

したがって、護岸壁などの構造物として必要な遮水性に応じて、目地材３０として、通常の円筒状目地材３０Ａを選択したり、許容変位の大きな目地材３０を選択するようにすれば良い。
また、目地材１０に対する外圧の保護だけを目的とする場合には、目地材３０，３０Ａと目地材１０との間に充填する流動性遮水材２０を省略するようにしても良い。 Therefore, the ordinary cylindrical joint material 30A or the joint material 30 having a large allowable displacement may be selected as the joint material 30 according to the water impermeability required for a structure such as a seawall.
Further, when only the purpose is to protect the joint material 10 from external pressure, the fluid impermeable material 20 filled between the joint material 30 and 30A and the joint material 10 may be omitted.

以上、実施の形態とともに、説明したように、本発明の構造物間の目地部の遮水構造１００によれば、目地部２を挟んで配置された構造物としてのケーソン１，１間の変位を許容し、目地部２を遮水するケーソン１，１間の目地部２の遮水構造１００であって、弾性部材によって形成されて目地部２を跨いでケーソン１，１に両端部が固定され、ケーソン１，１間の変位を許容して目地部２を遮水する止水部材としての目地材１０と、目地材１０が間隔をあけて固定された目地材１０，１０間の目地部２に、ケーソン１，１間の最大変位に対して変位した目地材１０の底部を浸漬させた状態として遮水できる目地部の高さの中間部まで充填された流動性遮水材２０と、を備えて構成したので、想定される地震動であるレベル１地震動による変位量およびレベル２地震動の大きな変位量に対しても目地材１０が瞬時に応答して伸長され、遮水性を確保することができる。また、目地材１０，１０間の目地部２に、ケーソン１，１間の最大変位に対して、変位した目地材１０の底部を遮水できる高さまで流動性遮水材２０が充填されているので、想定する地震動であるレベル２地震動による大きな変位が生じた場合でも、流動性遮水材２０の流動性により、目地材１０の底部の遮水性を確保することができる。
また、本発明の構造物間の目地部の遮水構造１００によれば、目地部２を挟んで配置された構造物としてのケーソン１，１間の変位を許容し、目地部２を遮水するケーソン１，１間の目地部２の遮水構造１００であって、弾性部材によって形成されて目地部２を跨いでケーソン１，１に両端部が固定され、ケーソン１，１間の変位を許容して目地部２を遮水する止水部材としての目地材１０と、目地材１０が間隔をあけて固定された目地材１０，１０間の目地部２に、ケーソン１，１間の最大変位に対して変位した目地材１０の底部を遮水できる高さまで充填された流動性遮水材２０と、を備え、目地材１０は、蛇腹状に形成された板状止水部材または、複数の円筒部を連結した円筒状止水部材で構成される余長部１２ａを備え、余長部１２ａへの流動性遮水材２０の回り込みを防止する回り込み防止部材１３が設けられているので、想定される地震動であるレベル１地震動による変位量およびレベル２地震動の大きな変位量に対しても目地材１０が瞬時に応答して伸長され、遮水性を確保することができる。また、目地材１０，１０間の目地部２に、ケーソン１，１間の最大変位に対して、変位した目地材１０の底部を遮水できる高さまで流動性遮水材２０が充填されているので、想定する地震動であるレベル２地震動による大きな変位が生じた場合でも、流動性遮水材２０の流動性により、目地材１０の底部の遮水性を確保することができる。
さらに、目地材１０は、余長部１２ａを備え、余長部１２ａが蛇腹状に形成された板状止水部材または、複数の環状部３２ａ，３２ｂを連結した円筒状止水部材で構成してあるので、想定する地震動の大きな変位に対しても目地材１０が損傷することなく、瞬時に変位して遮水性を確保することができる。
また、目地材１０は、余長部１２ａを備え、余長部１２ａへの流動性遮水材２０の回り込みを防止する回り込み防止部材１３が設けてあるので、流動性遮水材２０を蛇腹状の余長部１２ａの間に入り込むことを防止でき、目地材１０を想定される地震動に対して確実に変位させることができる。 As described above together with the embodiment, according to the water-impervious structure 100 for joints between structures of the present invention, the displacement between the caissons 1 and 1 as the structures arranged with the joints 2 interposed therebetween. Is a water-impervious structure 100 for the joint portion 2 between the caissons 1, 1 that allows water to be sealed to the joint portion 2, and both ends are fixed to the caisson 1, 1 across the joint portion 2 by an elastic member. And a joint material 10 as a water blocking member that allows displacement between the caissons 1 and 1 to block the joint portion 2 and a joint portion between the joint materials 10 and 10 to which the joint material 10 is fixed with a gap. 2, a fluid water-blocking material 20 filled up to an intermediate portion of the height of the joint portion, which is water-impervious as the bottom portion of the joint material 10 displaced with respect to the maximum displacement between the caissons 1 and 1 is immersed . Since it is configured with, the jointing material 10 instantly expands and secures water impermeability even with respect to the expected displacement of the level 1 seismic motion and the large displacement of the level 2 seismic motion. it can. Further, the joint portion 2 between the joint materials 10, 10 is filled with the fluid impermeable material 20 up to a height at which the bottom of the displaced joint material 10 can be shielded against the maximum displacement between the caisson 1, 1. Therefore, even when a large displacement occurs due to the assumed level 2 seismic motion, it is possible to ensure the water impermeability of the bottom of the joint material 10 due to the fluidity of the liquid impermeable material 20.
Further, according to the water-impervious structure 100 for joints between structures according to the present invention, displacement between the caisson 1, 1 as a structure arranged with the joints 2 in between is allowed, and the joints 2 are water-impervious. In the water-impervious structure 100 of the joint portion 2 between the caissons 1 and 1, both ends are fixed to the caisson 1, 1 by being formed of an elastic member and straddling the joint portion 2, and the displacement between the caissons 1 and 1 is prevented. The maximum amount of space between the caissons 1 and 1 is the joint material 10 as a water-blocking member that allows the joint portion 2 to be watertight, and the joint portion 2 between the joint materials 10 and 10 in which the joint material 10 is fixed at intervals. And a flowable water-blocking material 20 filled to a height capable of blocking water at the bottom of the joint material 10 displaced with respect to the displacement. Since the extra-length portion 12a configured by the cylindrical water-blocking member connecting the cylindrical portions is provided, and the wraparound prevention member 13 that prevents the permeable water-impervious material 20 from wrapping around the extra-length portion 12a is provided, The jointing material 10 instantly expands in response to the amount of displacement due to the level 1 seismic motion and the large amount of displacement of the level 2 seismic motion, which is the assumed seismic motion, and it is possible to secure water impermeability. Further, the joint portion 2 between the joint materials 10, 10 is filled with the fluid impermeable material 20 up to a height at which the bottom portion of the displaced joint material 10 can be shielded against the maximum displacement between the caisson 1, 1. Therefore, even when a large displacement occurs due to the assumed level 2 seismic motion, it is possible to ensure the water impermeability of the bottom of the joint material 10 due to the fluidity of the liquid impermeable material 20.
Furthermore, the joint material 10 is provided with an extra length portion 12a, and the extra length portion 12a is formed of a plate-shaped water stop member having a bellows shape or a cylindrical water stop member in which a plurality of annular portions 32a and 32b are connected. Since the joint material 10 is not damaged even when a large earthquake motion is assumed, the joint material 10 can be instantaneously displaced to ensure water impermeability.
Further, since the joint material 10 includes the extra length portion 12a and the wraparound prevention member 13 that prevents the permeable water impervious material 20 from wrapping around the extra length portion 12a, the fluid impervious material 20 is accordion-shaped. It is possible to prevent the joint material 10 from entering between the extra length portions 12a, and it is possible to reliably displace the joint material 10 against an expected earthquake motion.

本発明の構造物間の目地部の遮水構造１００によれば、目地材１０の間隔の少なくとも一方の外側に、外側からの圧力に抗して目地材１０を保護する目地材３０，３０Ａを設置したので、外側からの波圧や土砂圧が直接目地材１０に作用せず、目地材１０を損傷などから保護することができ、想定する地震動が発生した場合には確実に遮水性を確保することができる。 According to the water-impervious structure 100 of the joint between the structures of the present invention, the joint material 30, 30A for protecting the joint material 10 against the pressure from the outside is provided on the outside of at least one of the intervals of the joint material 10. Since it is installed, wave pressure and earth and sand pressure from the outside do not act directly on the joint material 10, and it is possible to protect the joint material 10 from damage, etc., and ensure water impermeability in the event of an expected earthquake motion. can do.

本発明の構造物間の目地部の遮水構造１００によれば、目地材１０の外側と目地材３０，３０Ａとの間に、ケーソン１，１間の最大変位に対して変位した目地材１０，１０の底部を浸漬させた状態として遮水できる目地部の高さの中間部まで流動性遮水材２０を充填したので、流動性遮水材２０を想定する地震動が発生するまで保持しておくことができ、地震発生時には、目地材１０，１０及び目地材３０の底部の遮水性を流動性遮水材２０で確保することができる。 According to the water-impervious structure 100 of the joint portion between the structures of the present invention, the joint material 10 displaced between the outer side of the joint material 10 and the joint material 30, 30A with respect to the maximum displacement between the caissons 1,1. Since the bottom of 10 is immersed, the fluid impermeable material 20 is filled up to the middle of the joint height where water can be impregnated , so keep the fluid impermeable material 20 until an earthquake is expected. In the event of an earthquake, the liquid impervious material 20 can secure the water impermeability of the bottoms of the joint materials 10, 10 and the joint material 30.

本発明の構造物間の目地部の遮水構造１００によれば、止水部材としての目地材１０の間隔の少なくとも一方の外側に、外側からの圧力に抗して目地材１０を保護する目地材３０，３０Ａを設置し、目地材１０の外側と目地材３０，３０Ａとの間に、ケーソン１，１間の最大変位に対して変位した目地材１０，１０の底部を浸漬させた状態として遮水できる目地部１０，１０の高さの中間部まで流動性遮水材２０を充填し、目地材１０は、余長部１２ａを備え、余長部１２ａへの流動性遮水材２０の回り込みを防止する回り込み防止部材１３が設けてあるので、流動性遮水材２０を蛇腹状の余長部１２ａの間に入り込むことを防止でき、目地材１０を想定される地震動に対して確実に変位させることができる。
また、目地材１０の間隔の少なくとも一方の外側に、外側からの圧力に抗して目地材１０を保護する目地材３０，３０Ａを設置したので、外側からの波圧や土砂圧が直接目地材１０に作用せず、目地材１０を損傷などから保護することができ、想定する地震動が発生した場合には確実に遮水性を確保することができる。
また、目地材１０の外側と目地材３０，３０Ａとの間に、ケーソン１，１間の最大変位に対して変位した目地材１０，１０の底部を遮水できる高さまで流動性遮水材２０を充填したので、流動性遮水材２０を想定する地震動が発生するまで保持しておくことができ、地震発生時には、目地材１０，１０及び目地材３０の底部の遮水性を流動性遮水材２０で確保することができる。 According to the water- impervious structure 100 for joints between structures according to the present invention, joints for protecting the joint material 10 on the outside of at least one of the intervals of the joint material 10 as the water blocking member against the pressure from the outside. With the materials 30 and 30A installed, the bottom of the joint material 10, 10 displaced relative to the maximum displacement between the caisson 1, 1 is immersed between the joint material 10 and the joint material 30, 30A. The flowable water-impervious material 20 is filled up to the middle of the height of the joint portions 10, 10 that can block water, and the joint material 10 includes the extra length portion 12a, and the flowable water-impervious material 20 to the extra length portion 12a. Since the wraparound prevention member 13 for preventing wraparound is provided, it is possible to prevent the fluid water-impervious material 20 from entering between the bellows-shaped extra length portions 12a, and the joint material 10 is surely against an expected earthquake motion. It can be displaced.
Further, since the joint material 30, 30A for protecting the joint material 10 against the pressure from the outside is installed on the outer side of at least one of the intervals of the joint material 10, the wave pressure and the earth-sand pressure from the outside are directly applied to the joint material. The joint material 10 can be protected from damage and the like without acting on 10, and the water impermeability can be reliably ensured when an assumed earthquake motion occurs.
Further, between the outer side of the joint material 10 and the joint material 30, 30A, the fluid impermeable material 20 up to a height at which the bottom of the joint material 10, 10 displaced with respect to the maximum displacement between the caissons 1, 1 can be impervious. Since it is filled with water, the fluid impermeable material 20 can be held until an expected earthquake motion occurs, and at the time of an earthquake, the water impermeability of the bottoms of the joint materials 10, 10 and the joint material 30 can be maintained. It can be secured by the material 20.

なお、上記実施の形態では、目地材１０と目地材３０を例に説明したが、目地材１０や目地材３０の形状は、上記のものに限らず、両端部に取付部を備え、これらをつないで変位に追随できる余長部あるいは伸縮部が設けられるものであれば、どのような形状や材料であっても良い。
また、上記実施の形態では、ケーソンの目地部に適用する場合で説明したが、ケーソンに限らず他の構造物の目地部にも同様に適用することができる。 In addition, in the said embodiment, although the joint material 10 and the joint material 30 were demonstrated as an example, the shape of the joint material 10 and the joint material 30 is not limited to the above-mentioned thing, it equips both ends with a mounting part, and these. Any shape or material may be used as long as it is provided with an extra length portion or a stretchable portion that can be connected and follow displacement.
Further, in the above-described embodiment, the case of applying to the joint portion of the caisson has been described, but the present invention is not limited to the caisson and can be similarly applied to the joint portion of other structures.

１００目地部の遮水構造
１ケーソン（構造物）
１ａ端面
２目地部
３，３目地材取付溝
３ａ，３ａ開口部
３ｂ，３ｂ空間
３ｃ充填材
４凹部
５板材
５ａ丸棒
６挿し込み固定金具
７ボルト・ナット
８トレンチ部
９遮水材
１０目地材（止水部材）
１１１次止水部材
１１ａ取付部
１２２次止水部材
１２ａ余長部
１２ｂ取付部
１３回り込み防止部材
１３ａ側部防止材
１３ｂ底部防止材
１３Ａ回り込み防止部材
１３ｃ底部防止材
１３Ｂ回り込み防止部材
１３ｄ側部防止材
２０流動性遮水材
３０目地材
３０Ａ円筒状目地材（止水部材）
３１取付部
３２余長部
３２ａ大環状部
３２ｂ小環状部
３３中詰材
Ｅ埋立側
Ｓ海側 Impermeable structure at 100 joints 1 Caisson (structure)
1a End face 2 Joint part 3, 3 Joint material mounting groove 3a, 3a Opening part 3b, 3b Space 3c Filler 4 Recess 5 Plate material 5a Round bar 6 Insertion fixing metal fitting 7 Bolt nut 8 Trench part 9 Water blocking material 10 Joint material (Water stop member)
11 Primary Water Stopping Member 11a Mounting Part 12 Secondary Water Stopping Member 12a Extra Length 12b Mounting Part 13 Rotation Preventing Member 13a Side Preventing Material 13b Bottom Preventing Material 13A Rotation Preventing Member 13c Bottom Preventing Material 13B Rotation Preventing Member 13d Side Part Preventing material 20 Flowable water-impervious material 30 Joint material 30A Cylindrical joint material (water blocking member)
31 Mounting part 32 Extra length part 32a Large annular part 32b Small annular part 33 Filling material E Landfill side S Sea side

Claims

Allowing the displacement between the structures arranged across the joint, the water-impervious structure of the joint between the structures that block the joint water,
A water stop member formed by an elastic member, both ends of which are fixed to the structure straddling the joint portion, permitting displacement between the structures and water-blocking the joint portion,
The bottom of the water blocking member, which is displaced with respect to the maximum displacement between the structures, is immersed in the joint between the water blocking members to which the water blocking members are fixed at intervals, so that water can be blocked. A fluid impermeable material filled up to an intermediate portion of the height of the joint portion ,
A water-impervious structure at joints between structures.

Allowing the displacement between the structures arranged across the joint, the water-impervious structure of the joint between the structures that block the joint water,
A water stop member formed by an elastic member, both ends of which are fixed to the structure straddling the joint portion, permitting displacement between the structures and water-blocking the joint portion,
The joint portion between the water blocking members, in which the water blocking members are fixed at intervals, is filled to a height capable of blocking water at the bottom of the water blocking member displaced with respect to the maximum displacement between the structures. And a fluid impermeable material,
The water blocking member includes a plate-shaped water blocking member formed in a bellows shape, or an extra length portion configured by a cylindrical water blocking member connecting a plurality of cylindrical portions,
A wraparound prevention member for preventing wraparound of the fluid impermeable material to the extra length portion is provided,
A water-impervious structure at joints between structures.

Outside of at least one of the intervals of the water blocking member, a joint material for protecting the water blocking member against pressure from the outside is installed.
The water-impervious structure of a joint between structures according to claim 1 or 2 , characterized in that.

Between the outer side of the water blocking member and the joint material, the middle of the height of the joint part capable of blocking water with the bottom part of the water blocking member displaced relative to the maximum displacement between the structures being immersed was filled with the flowable water shield material to parts,
The water-impervious structure of the joint between the structures according to claim 3 , wherein.

Outside at least one of the intervals of the water blocking member, a joint material is installed to protect the water blocking member against pressure from the outside,
Between the outer side of the water blocking member and the joint material, the middle of the height of the joint part capable of blocking water with the bottom part of the water blocking member displaced relative to the maximum displacement between the structures being immersed Fill the fluid impermeable material up to the part,
The water shutoff member includes an extra length portion, and a wraparound prevention member that prevents the fluid water impervious material from wrapping around the extra length portion is provided.
The water-impervious structure of the joint between the structures according to claim 1 .