JP2007211545A - Joint member and its construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint member easily mountable after installing caissons, blocks, or the like and excelling in transportability and working efficiency, and to provide its construction method. <P>SOLUTION: Joint member mounting grooves 3, 3 provided at facing caissons 1, 1 or the like and comprising openings 3a are provided with slip-off preventing members 13, 13 on the outside of mounting parts 11, 11 at both ends of an expansion part 12 of a flexible material serving as the joint member 10. These slip-out preventive members 13, 13 to prevent slip-out from the openings 3a of the grooves 3 while securing weight when mounted. Further, mounted shape without a curl is held by the slip-out preventing members 13, and friction with the grooves is reduced to facilitate mounting to the grooves, and mounting after transportation is attained by the slip-out preventing members arranged outside to facilitate handling. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a joint material and a construction method thereof, and a joint material for water shielding of a structure such as a revetment wall constructed side by side with caisson or a block or a revetment wall of a management-type waste final disposal site, a caisson, a block, etc. It is designed to prevent damage to joint materials by attaching after installing.

 For structures such as revetment walls and revetment walls of managed-type waste final disposal sites, caisson and blocks are arranged side by side to construct a revetment wall, and due to ground deformation or unequal subsidence due to earthquakes, etc. In order to prevent the outflow of earth and sand, waste, sewage, etc. even if the interval is displaced, it is necessary to shield the joints, and various joint materials and their water shielding structures have been proposed.

 In the conventional joint seal structure, the joint material is fixed in advance to the preceding caisson with anchor bolts and presser plates, etc., and after the subsequent caisson is installed, the cylindrical portion of the joint material is filled with the filling material. There are things that insulate water by inflating, but because they are attached in advance, they may be damaged during caisson installation work.

 Therefore, a vertical groove is formed on the opposing surface of the adjacent caisson, the opening of the groove is narrowed into a slit shape, and the shape fits in the groove and is sufficiently larger than the mounting portion and joint width that do not come out of the opening Prepare a joint material made of flexible material having a wide water-impervious portion and install the caisson, and then fit the attachment parts at both ends of the joint material into the opposite grooves and install the joint parts. Watering has been proposed (see Patent Documents 1 and 2).

In such a caisson joint material, a core material is inserted into the center of the mounting portion in order to prevent the caisson joint material from coming out from the opening of the groove.
Japanese Patent Laid-Open No. 06-116924 JP 2005-146659 A

  However, by using such joint material, it can be installed by inserting into the groove provided on the facing surface of the caisson after the caisson is installed, and it can be prevented from being damaged during the caisson installation. Because the core material is put in the center of the mounting part at both ends, if a highly rigid core material is inserted in advance, a long joint material cannot be wound in the longitudinal direction according to the caisson height. There is a problem of hindering handling such as transportation.

  On the other hand, if the rigidity of the core material is set so that the core material can be wound in the longitudinal direction, there arises a problem in workability such that the joint material cannot be smoothly mounted due to the curl when inserted into the groove.

  Further, in any joint material described above, the outer surface of the mounting portion is made of a flexible material such as rubber like the expansion and contraction portion, so that friction with the inner surface of the groove is large and insertion into the groove cannot be easily performed. There's a problem.

  The present invention has been made in view of the above-described problems of the prior art, and is intended to provide a joint material that can be easily attached after a caisson or a block is installed, and is excellent in transportability and workability, and a construction method thereof. It is what.

  The joint material according to claim 1 of the present invention that solves the problems of the prior art is a joint material mounting groove that is provided in the vertical direction of the facing surface of the structure that is opposed to the joint member and that has a narrow opening. In addition, a joint material having a flexible material expansion and contraction portion capable of absorbing the displacement of the joint portion at an intermediate portion disposed between the opening portions, with the attachment portions of the respective end portions being mounted, The joint material is provided with a slip-out preventing member that prevents the joint material mounting groove from slipping out of the opening and secures a hanging weight at the time of mounting on the outside of the mounting portion at both ends of the joint material. To do.

  According to this joint material, a slip-out preventing material is provided on the outside of the attachment portions at both ends of the expansion / contraction portion of the flexible material as a joint material in the joint material attachment groove provided in the facing caisson or the like and provided with an opening. It is designed to secure the weight at the time of mounting, and to keep the mounting shape free of wrinkles and wrinkles, and to reduce the friction with the groove. It can be easily installed in the groove, and is arranged on the outside, so that it can be attached after transportation and easy to handle.

  Further, the joint material according to claim 2 of the present invention is characterized in that, in addition to the configuration according to claim 1, the slip-out prevention member is a metal member attached to the outside of the attachment portion. .

  According to this joint material, the slip-out preventing member is a metal member that is attached to the outside of the mounting portion, and the slip-out preventing member can be easily configured with the metal member, and workability by reducing friction and securing weight, etc. A function necessary as a joint material can be obtained.

  Further, in the joint material according to claim 3 of the present invention, in addition to the configuration according to claim 1 or 2, a tipping-type steel material in which the pull-out prevention member is attached in advance to the outside of the attachment portion with a contact interval, It is a post-attached steel material that is attached to the space between the pre-attached steel materials when being mounted in the joint material attaching groove.

  According to this joint material, the slip-out prevention member is attached in advance to the interval between the pre-attached steel member, which is attached in advance to the outside of the attachment portion with a gap, and the pre-attached steel member is attached to the joint material attachment groove. It is a type steel material, and it can be transported in a folded manner by attaching a pre-attached type steel material at an interval in advance, and by attaching a retrofit type steel material when installing in a groove, In addition to greatly improving handling, the functions necessary for joint materials such as workability by reducing friction and securing weight can be secured.

  Moreover, the joint material according to claim 4 of the present invention is characterized in that, in addition to the structure according to any one of claims 1 to 3, the pull-out prevention member is mounted symmetrically on both sides sandwiching the mounting portion. To do.

  According to this joint material, the pull-out prevention member is mounted symmetrically on both sides of the mounting portion, and can be suspended in a well-balanced manner when installed in the joint material mounting groove. Can be done smoothly.

  Furthermore, in addition to the structure in any one of Claims 1-4, the joint material of Claim 5 of this invention is filled with the filling material in the expansion-contraction part of the joint material, and the said joint part is water-shielded. It is characterized by providing a hollow portion that can be made.

  According to this joint material, the expansion / contraction portion of the joint material is provided with a hollow portion that is filled with the filling material so that the joint portion can be blocked by water, and the joint is formed by the hollow portion that is inflated with the filling material. It becomes possible to improve the water shielding property of the part.

  According to a sixth aspect of the present invention, there is provided a joint material construction method in which a joint material mounting groove in which a narrow opening is opposed to each other in a vertical direction of a facing surface of a structure facing each other with the joint portion interposed therebetween, A joint material composed of a flexible material expansion / contraction part in which an attachment part of the end part is mounted in the joint material attachment groove and an intermediate part is disposed between the opening parts to absorb the displacement of the joint part. The joint material construction method for attaching and attaching the joint material to the attachment parts at both ends of the joint material prevents the joint material attachment groove from coming out of the opening, and reduces the suspension weight at the time of attachment. An escape prevention member to be secured is provided, and the joint material to which the escape prevention member is attached is suspended in the joint material mounting groove, and the intermediate portion is positioned between the openings of the joint material mounting groove and fixed. It is characterized by Than is.

  According to this joint material construction method, a slip-out preventing material is provided outside the attachment portions at both ends of the flexible material expansion / contraction portion in the joint material attachment groove having a groove facing the caisson or the like with the opening facing the groove. This prevents the slipping out of the opening of the joint, secures the weight during mounting, suspends the joint material with this slip-out prevention member attached to the joint material mounting groove, and places the middle part between the joint material mounting groove openings. It is designed to be mounted and fixed at the position of the mounting part, and it keeps the mounting shape without slipping out and wrinkles with the slipping prevention material on the outside of the mounting part, while reducing the friction with the groove and securing the hanging weight to the groove Can be easily mounted, and by disposing it on the outside, it can be attached after transporting and is easy to handle.

  Furthermore, the construction method of the joint material according to claim 7 of the present invention is the construction according to claim 6, and after the joint material is suspended and mounted in the joint material mounting groove, the joint material is filled in the joint material mounting groove. It is characterized by being filled and fixed.

  According to this joint material construction method, after the joint material is suspended and mounted in the joint material mounting groove, the joint material mounting groove is filled with the filler and fixed, and a slip-out prevention member is attached. The mounting portion can be fixed to the joint material mounting groove with the filler in a reliable and water-tight state.

  Moreover, in addition to the structure of Claim 6 or 7, the construction material of the joint material of Claim 8 of this invention is comprised with the joint material in any one of the said Claims 1-5. It is characterized by being.

  According to the construction method of this joint material, the joint material is composed of the joint material according to any one of claims 1 to 5, and by using these joint materials, a slip-out preventing material on the outside of the attachment portion is used. It is possible to keep the mounting shape without pulling out and wrinkles, reducing friction with the groove, and securing the hanging weight so that it can be easily mounted in the groove. It can be attached later and is easy to handle.

  According to the joint material of claim 1 of the present invention, the joint material mounting groove provided in the opposing caisson or the like and having an opening is provided on the outside of the attachment portions at both ends of the stretchable portion of the flexible material as the joint material. A slip-out prevention material is provided to prevent slipping out of the opening of the groove, and the weight at the time of mounting is secured, so the slip-out prevention material on the outside of the mounting portion can keep the mounting shape without slipping out and wrinkles. In addition, it is possible to reduce the friction with the groove to facilitate the mounting to the groove, and by disposing it on the outside, it is possible to attach it after transportation and to facilitate the handling.

  According to the joint material of claim 2 of the present invention, since the slip-out preventing member is a metal member that is attached to the outside of the mounting portion, the slip-out preventing member can be easily configured with the metal member. It is possible to easily obtain functions necessary as a joint material such as workability by reducing friction and securing weight.

  Furthermore, according to the joint material according to claim 3 of the present invention, the slip-off prevention member is attached to the outside of the attachment portion in advance with a spacing, and is attached to the joint material mounting groove and the tip-attached steel material. Since it is composed of a post-attached steel material that is attached to the interval of the pre-attached steel material, by attaching the pre-attached steel material with a space in advance, it can be transported so as to be folded, and when installed in the groove By attaching a retrofit steel material, it is possible to greatly improve the transportability and handleability, and at the same time obtain the necessary functions as a joint material such as workability by reducing friction and securing weight.

  According to the joint material of claim 4 of the present invention, since the slip-out preventing member is mounted symmetrically on both sides sandwiching the mounting portion, it is suspended in a well-balanced manner when being mounted in the joint material mounting groove. It can be lowered, and mounting can be performed more smoothly.

  Furthermore, according to the joint material according to claim 5 of the present invention, since the expansion / contraction part of the joint material is provided with the hollow portion that is filled with the filling material and can shield the joint part. The hollow portion inflated with the filler can improve the water shielding property of the joint portion more reliably.

  Moreover, according to the construction method of the joint material according to claim 6 of the present invention, the joint material mounting groove provided with the groove facing the caisson or the like with the opening portion is provided with the attachment portions at both ends of the flexible material expansion and contraction portion. A slip-out prevention material is provided on the outside to prevent the slip-out from the opening of the groove, and the weight during mounting is secured, and the joint material to which the slip-off prevention member is attached is suspended in the joint material mounting groove, and the middle part Is placed between the openings of the joint material mounting groove and fixed so that it can be pulled out and the mounting shape without wrinkles can be maintained with the anti-extraction material on the outside of the mounting part, and the friction with the groove can be reduced. In addition, the suspension weight can be secured and mounting in the groove can be easily performed, and by disposing it further on the outside, attachment after transportation is possible and handling can be facilitated.

  Further, according to the joint material construction method according to claim 7 of the present invention, after the joint material is suspended and mounted in the joint material mounting groove, the joint material mounting groove is filled with the filler and fixed. Therefore, the attachment portion to which the slip-out prevention member is attached can be fixed to the joint material attachment groove with the filler in a reliable and water-tight state.

  Moreover, according to the construction method of the joint material according to claim 8 of the present invention, since the joint material is constituted by the joint material according to any one of claims 1 to 5, by using these joint materials, With the anti-extraction material on the outside of the mounting part, it is possible to keep the mounting shape without slipping out and wrinkles, reduce the friction with the groove, and secure the hanging weight to facilitate mounting in the groove Further, the pull-out prevention member arranged on the outer side allows attachment after transportation and facilitates handling.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 relate to an embodiment in which the joint material of the present invention and its construction method are applied to a joint part of a caisson that is a structure, and FIG. 1 is a plan view of the joint material and a transportation state of the joint material. FIG. 2 is a perspective view and a plan view of a construction state, FIG. 3 is a plan view of a caisson construction completion state and a displacement state at the time of an earthquake, and FIG. 4 is a plan view and a sectional view of a caisson arrangement state. It is.

  The joint material and its construction method of the present invention are applied to, for example, the joint part 2 between the caissons 1 and 1, which is a structure as shown in FIG. 4, and the joint material 10 is constructed to impede the joint part 2. Is done. The structure may be a caisson such as concrete, steel, hybrid made by combining these, or an L-shaped block.

  The caissons 1 and 1 as the structure provided with the joint material 10 are provided with narrow opening portions 3a and 3a on the end faces 1a and 1a facing each other with the joint portion 2 interposed therebetween, and spaces 3b and 3b inside. The joint material mounting grooves 3 and 3 provided with are formed in the vertical direction. For example, as shown in FIG. 2 (b), the joint material mounting grooves 3, 3 are formed by forming a concave portion 4 having a rectangular cross section on the end surface 1 a of the caisson 1 and closing the opening with two plate materials 5. A narrow opening 3a and an internal space 3b are formed as joint material mounting grooves 3 and 3. Furthermore, in this joint material attachment groove 3, 3, in order to prevent damage due to contact between the openings 3a, 3a and the joint material 10, a round bar 5a is attached to the opening side end of the plate member 5 by welding, The contact is made on the arc surface.

  As long as the opening 3a is narrow and the space 3b is formed therein, the cross-sectional shape of the joint material mounting groove 3 is not limited to a rectangle but may be other shapes such as a circle. The opening 3a is located on the end surface 1a of the caisson 1, and the space 3b is not limited to being disposed in the caisson 1, but a separate joint material mounting groove made of steel or the like protrudes from the end surface 1a of the caisson 1. It can also be made to attach.

  Such a joint material mounting groove 3 depends on the size of the end face 1a of the caisson 1, but in the example of FIG. 4, two places are provided on the sea side and two places on the opposite side such as the waste input side. Thus, the joint material 10 is constructed at four locations.

  The facing joint material mounting grooves 3 and 3 of the caissons 1 and 1 do not need to be completely opposed to each other in a straight line, and differ depending on the size of the joint material 10 and the like. And facing each other.

  The joint material 10 attached between the joint surfaces 1a and 1a of the facing caisons 1 and 1 and the joint material attachment grooves 3 and 3 of the opposing caisson 1 and 1 is attached to the joint material attachment grooves 3 at both ends as shown in FIG. The attachment portions 11 and 11 are provided, and the attachment portions 11 and 11 are connected to each other, and an expansion / contraction portion 12 that can follow the displacement of the joint portion 2 is provided, and is made of a flexible material such as rubber or synthetic resin. The displacement and the shape effect are made to follow the displacement. As the joint material 10, a material having a reinforcing structure in which a reinforcing material is placed inside a flexible material as required and the outside is a flexible material is used.

  In this joint material 10, a macro ring part 12 a in which a stretchable part 12 connects a sheet-like flexible material in a ring shape to form a space serving as a hollow part therein, and a macro ring part 12 a serving as this hollow part. The central portion of the sheet-like flexible material is overlapped and connected to the central portion, and the small annular portion 12b is formed in an annular shape by overlapping both end portions. Further, the overlapping portion of the small annular portion 12b of the joint material 10 is used as one mounting portion 11, and a sheet of flexible material is overlapped and connected to the central portion on the opposite side of the large annular portion 12a. Is the other mounting portion 11 protruding outward. The joint material 10 having such a cross-sectional shape is formed in the longitudinal direction to have a required length corresponding to the height of the caisson 1, and connects a plurality of sheets of flexible material by bonding or the like. It is manufactured by.

  The attachment portions 11, 11 of the joint material 10 are attached with a slip-out prevention member 13 from the outside so as not to slip out of the opening 3 a when the joint material is mounted in the joint material mounting groove 3. While maintaining the shape of the attachment parts 11 and 11 of the joint material 10, a suspended weight is ensured and workability is improved.

  In addition, according to the experiment on the ground, the weight required for this suspension is a resistance value of about 10 kgf / m when inserting the joint portion of the joint material into the joint material mounting groove. If the specific gravity of the joint material is about the same as that of seawater and the specific gravity of the steel used for the escape prevention material is 7.85, the required weight W considering the buoyancy due to seawater is 10 ÷ (8.85 / 7.85) Therefore, it is preferable to set W to 11 kgf / m or more by adding the weights on both sides.

  This slip-out preventing member 13 can be protruded to the outside when it is attached to the mounting portion 11 so as not to slip out from the opening 3a, and a metal member such as a steel plate is preferably used in order to maintain the shape and ensure the weight. .

  In this joint material 10, the slip-out preventing member 13 is made of channel steel, and the groove portions are arranged along the longitudinal direction from both outer sides of the mounting portions 11, 11 with the groove portions back to back, and are attached by tightening with bolts.

  When the slip-out prevention member 13 made of such a grooved steel is attached in the longitudinal direction of the attachment portions 11 and 11 of the joint material 10, the joint material 10 cannot be wound or folded in the longitudinal direction, and handling such as transportation Will be disturbed.

  In view of this, the joint material 10 is composed of a front-end slip-off preventing member (front-attached steel member) 13a to which the slip-off preventing member 13 is attached in advance, and a post-attachment slip-out preventing member (retrofitting type steel member) 13b attached at the construction site after transportation. . Then, as shown in FIG. 1 (b), a pre-attachment slip-out preventing member (pre-attached steel member) 13a attached in advance is attached to the attachment portions 11, 11 of the joint material 10 with a space therebetween. (Steel material) 13b can be attached to a curved portion, folded and placed on a carriage, and stacked as necessary via a spacer or the like.

  And when carrying out the post-attachment prevention member (retrofitting type steel material) 13b at a construction site after transportation, it arrange | positions in the part which opened the space | interval of the pre-attached advance prevention member (pre-attachment type steel material) 13a, and attaches up and down. It is possible to secure a linear shape by connecting with a slip-out prevention member (pre-attached steel material) 13a by spot welding, or by attaching and attaching a post-attachment preventive member (retrofitting type steel material) 13b longer than the interval by tightening with bolts. To do.

Next, the construction method of such joint material 10 is demonstrated.
The attachment portions 11 and 11 of the joint material 10 can be lifted in accordance with the distance between the joint material attachment grooves 3 and 3 of the caissons 1 and 1 facing each other across the joint portion 2 (usually corresponding to the joint interval D). For example, as shown in FIG. 2A, a lifting jig 20 is prepared.

  The lifting jig 20 extends the small annular portion 12b of the joint material 10 to one end portion 21a of the substantially cross-shaped lifting plate 21 to support the mounting portions 11 and 11 in accordance with the joint spacing D, and lifts. The large annular part 12a of the expansion / contraction part 12 is crushed and supported so that it can be hung from the joint part 2 at the other opposite end parts 21b of the plate 21.

  The joint material 10 thus lifted via the lifting jig 20 is suspended, the attachment portions 11, 11 at both ends are located in the spaces 3b, 3b of the joint material attachment grooves 3, 3, and the telescopic portion 12 is the opening 3a. , 3a and hanging from the lower end of the joint material 10 by using the weight of the pull-out prevention member 13 to hang it.

  Then, in a state where most of the front-end slip-out preventing member (front-end type steel material) 13a of the joint material 1 is inserted, the rear-end slip-out preventing member (back-end type steel material) 13b is attached on the site, and the attachment portions 11 and 11 of the joint material 10 are attached. The joint material 10 is mounted up to the top end mark preliminarily attached to the joint material mounting grooves 3, 3.

  After that, the suspending jig 20 is removed, and the filling material 14 such as asphalt mastic is filled inside the large annular portion 12a of the expansion / contraction portion 12 of the joint material 10 and spreads, and the water shielding is in contact with both sides of the joint portion 2. (The filling of the filling material 14 is replenished after the filling of the caissons 1 and 1 after filling).

Then, a filling material 15 such as an expanded mortar is filled and fixed in the space 3b of the joint material mounting grooves 3 and 3 in which the mounting portions 11 and 11 of the joint material 10 are mounted.
In this way, the installation construction of one joint material 10 is completed (see FIG. 3A).

  Thereafter, as shown in FIG. 4, when two joint materials 10 are provided adjacent to each other, a filling material 16 such as asphalt mastic is inserted between the joint materials 10 and 10, thereby further complete shielding. Ensure water conditions.

  In the state where the joint material 10 is thus constructed, when the caissons 1 and 1 are displaced due to, for example, an earthquake and the joint interval D is widened, the small annular portion 12b of the joint material is pulled out as shown in FIG. It spreads like a water and the water-blocking state is maintained.

  In addition, when the caissons 1 and 1 are displaced due to an earthquake or the like and the joint interval D is widened and at the same time shifts back and forth, the small annular portion 12b of the joint member 10 is inclined as shown in FIG. The water shielding state is maintained by spreading so as to be drawn out.

  According to this joint material 10 and its construction method, the slip-out prevention material 13 is provided outside the attachment portions 11, 11 at both ends of the flexible material stretchable portion 12, so that the outside of the attachment portions 11, 11 is prevented from slipping out. It is possible to prevent the material 13 from slipping out, and to maintain a wrinkle-free mounting shape and to secure the weight during mounting, thereby improving the workability.

  In addition, the metal member and the steel plate member preventive member 13 can reduce the friction with the joint material mounting grooves 3 and 3 and facilitate the mounting as compared with the case where the possibility material is located outside.

  Furthermore, by disposing the pull-out prevention member 13 on the outside, it is possible to attach the retrofit steel material 13b after transportation and before mounting, which is excellent in transportability and handleability.

  According to this joint material 10 and its construction method, the slip-out prevention member 13 is mounted symmetrically on both sides sandwiching the attachment portions 11, 11. It can be hung while maintaining the left and right balance, and the installation can be smoothly performed in a stable state, such as further mounting.

  Furthermore, in this joint material 10 and its construction method, the expansion / contraction part 12 of the joint material 10 is provided with a large annular portion 13a as a hollow portion so as to be filled with the filling material. The water blocking property of the joint portion 2 can be improved by the macro-annular portion 13a which is a hollow portion.

Next, another embodiment of the joint material and its construction method according to the present invention will be described with reference to FIG.
This joint material 30 is configured by a rubber or synthetic resin sheet-like membrane member having a multi-layer structure, and includes a pressure-receiving membrane sheet 31 and a folding portion 32a wider in the middle than the pressure-receiving membrane sheet on the outside thereof. The displacement follow-up film sheet 32 formed with bulging parts 32b swelled at both ends and a protective film sheet 33 such as a protective rubber on the outer side are overlapped. The pressure-receiving membrane sheet 31 and the displacement follow-up membrane sheet 32 have a reinforcing structure with a reinforcing material sandwiched therebetween, and the attachment portions 34 and 34 at both ends have two reinforcing materials in the width direction and two in the length direction. 4 is a ply structure, and the expansion / contraction part 35 in the middle part has a 2-ply structure in which two reinforcing materials are inserted.

  In the mounting portions 34, 34 at both ends of the joint material 30, bolts are provided on both sides of the mounting portion 34 as the escape prevention material 36 so that the central side of the angle steel protrudes at a right angle. It is tightened with.

  As described above, this slip-out prevention member 36 is also composed of a front-end slip-out prevention member that is attached in advance in the longitudinal direction with a certain interval and a post-attachment slip-out prevention member that is attached before transporting and mounting. So that it can be folded, thereby ensuring transportability and handling.

  The mounting of the joint material 30 to the joint material mounting grooves 3 and 3 is performed in the same manner as the joint material 10 already described.

  In this joint material 30, the attachment interval between the attachment portions 34, 34 and the pull-out prevention member 36 is constant, and cannot be changed by the amount of pulling out of the small annular portion 12 b like the joint material 10. It is suspended and mounted in the spaces 3b and 3b of the grooves 3 and 3.

  Therefore, the chevron steel of the slip-out prevention member 36 does not necessarily come into contact with the opening 3a as shown in FIG. 5B, for example, but is fixed by filling the filler 15, and the water shielding and displacement There is no hindrance to the follow-up performance.

  The joint material 30 and its construction method also have the same effects as the joint material 10 and its construction method already described.

  In each of the above embodiments, the joint material having two different shapes has been described as an example. However, the shape of the joint material is provided with a mounting portion at both ends, and a portion that can follow these displacements by connecting them is provided. Any shape or material may be used.

  Moreover, in the said embodiment, although demonstrated in the case of applying to the joint of a caisson, it can apply similarly to the joint of not only a caisson but another structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a joint material according to an embodiment in which the joint material of the present invention and its construction method are applied to a joint part of a caisson that is a structure, and a schematic explanatory diagram of a transport state of the joint material. It is the perspective view and top view of the construction state concerning one Embodiment which applied the joint material and its construction method of this invention to the joint part of the caisson which is a structure. It is a top view of the construction completion state to the caisson concerning one embodiment which applied the joint material of this invention, and its construction method to the joint part of the caisson which is a structure, and the displacement state at the time of an earthquake. It is the top view and sectional drawing of the arrangement | positioning state to the whole caisson concerning one Embodiment which applied the joint material and its construction method of this invention to the joint part of the caisson which is a structure. It is the top view of the joint material concerning one Embodiment which applied the joint material of this invention, and its construction method to the joint part of the caisson which is a structure, and the top view of the construction state to a caisson.

Explanation of symbols

1 Caisson (structure)
DESCRIPTION OF SYMBOLS 1a End surface 2 Joint part 3, 3 Joint material attachment groove 3a, 3a Opening part 3b, 3b Space 4 Recessed part 5 Plate material 5a Round bar 10 Joint material 11 Attachment part 12 Expansion part 12a Macrocyclic part (hollow part)
12b Small annular portion 13 Pull-out prevention member 13a Tip-out pull-out prevention member (tip-type steel)
13b Retrofitting prevention member (retrofitting type steel)
14 Filling material 15 Filling material 16 Filling material 20 Lifting jig 30 Joint material 31 Pressure-receiving film sheet 32 Displacement follow-up film sheet 33 Protective film sheets 34 and 34 Attachment part 35 Stretching part 36 Pull-out prevention member D Joint distance

Claims (8)

Mounting portions of the respective end portions are mounted in joint material mounting grooves provided in the vertical direction of the opposing surface of the structure facing each other across the joint portion and facing the narrow opening portion, and between the opening portions. A joint material provided with a stretchable portion of a flexible material capable of absorbing the displacement of the joint portion in the arranged intermediate portion,
The joint material is provided with a slip-out preventing member that prevents the joint material mounting groove from slipping out of the opening and secures a hanging weight at the time of mounting on the outside of the mounting portion at both ends of the joint material. Joint material to be used.   The joint material according to claim 1, wherein the pull-out prevention member is a metal member that is attached to the outside of the attachment portion.   The slip-out prevention member is a tip-attached steel material that is attached in advance to the outside of the attachment portion with a gap, and a post-attachment steel material that is attached to the space between the tip-attachment steel materials when installed in the joint material attachment groove. The joint material according to claim 1 or 2, characterized in that   The joint material according to any one of claims 1 to 3, wherein the pull-out prevention member is mounted symmetrically on both sides of the mounting portion.   The joint material according to any one of claims 1 to 4, wherein a hollow portion is provided in the joint portion of the joint material so as to be filled with a filling material so that the joint portion can be sealed. A joint material mounting groove is provided in which the narrow opening is opposed in the vertical direction of the opposing surface of the structure facing the joint part, and the attachment part of each end is mounted on the joint material mounting groove, It is a construction method of a joint material to which a middle part is disposed between the openings and is attached by attaching a joint material composed of an elastic part of a flexible material that can absorb the displacement of the joint part,
The mounting portions at both ends of the joint material are provided with a slip-out prevention member that prevents the joint material mounting groove from slipping out of the opening and secures a hanging weight at the time of mounting. A method for constructing a joint material, wherein the joint material is suspended in the joint material mounting groove, and the intermediate portion is positioned between the openings of the joint material mounting groove.   7. The joint material construction method according to claim 6, wherein the joint material is suspended and mounted in the joint material mounting groove, and then the joint material mounting groove is filled with a filler and fixed. The said joint material is comprised with the joint material in any one of the said Claims 1-5, The construction method of the joint material of Claim 6 or 7 characterized by the above-mentioned.

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