JPH077438Y2 - Cylindrical wall for lining drill holes - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tubular wall body used for lining multiple drill holes.

"Prior Art" In recent years, as a large-section shield construction method for constructing a large-section tunnel structure such as a railway tunnel, what has been called a double-circle special section shield construction method has come into use.

This construction method uses a shield excavator with a structure in which a plurality of cylindrical shield excavators are connected, and excavates the ground or the ground in a cross-sectional shape in which a plurality of circles are partly overlapped in a continuous shape, Segments such as RC segments are assembled on the inner surface of this excavated hole to form a tubular wall body, and a plurality of this tubular wall body are connected along the hole (primary lining). After filling the filling material that fills the voids between the back surface of the base, that is, between the segment and the ground, concrete is wound up on the inner surface of the primary lining (secondary lining), and the ground is supported by them, It is to compose the inner space of. Conventionally, as this type of cylindrical wall, those shown in FIGS. 8 to 10 have been proposed.

In FIG. 8, reference numerals 1 and 1 are main wall portions, which are formed by arcuate plate-shaped RC segments (segments) 2, 2, ... 1
The openings 1a, 1a along the axial direction are arranged to face each other. Reference numerals 3 and 3 denote branch RC segments (branch segments) having a substantially Y-shaped cross section that connect one end and the other end of the openings 1a and 1a, respectively. In order to prevent collapse and deformation of the tubular wall body due to its own weight and pressure from the surrounding ground, a concrete middle pillar 4 is built by bolt connection.

And what was assembled in a ring shape like this,
A tubular wall body is constructed by bolting in the axial direction.

In addition, in the illustrated example, two main wall portions 1 and 1 are formed on the left and right sides, but there is also a cylindrical wall body in which two main wall portions 1 and 1 are formed on the upper and lower sides. , The latter is called a vertical double type. In addition, the shape of 3 with more circles
A continuous type and a 4-type are also considered. In the following description, for the sake of convenience, the horizontal double type is mainly taken up.

Next, FIG. 9 and FIG. 10 show the connected state of the one RC part 3 of the branch and the middle pillar 4. The connection between the other branch RC segment 3 and the center pillar 4 is the same as in these figures if it is inverted. FIG. 9 is a front view seen from the advancing direction side of the excavation work, and FIG. 10 is a side view. As shown in these figures, the center pillar 4 is a square pillar.

In addition, the joint surface 4a of the center pillar 4 and the branch RC segment 3,
Joint fittings 4b and 3b are embedded in 3a. Fitting 4
Bolt insertion holes are formed in b and 3b, and by connecting these joint fittings 4b and 3b by bolts, the center pillar 4 is connected to the branch RC segment 3.

Further, in the illustrated example, since the passage that connects the left and right (upper and lower in the vertical type) of the movable cylindrical wall body used for ventilation or movement of personnel is provided, the center pillar 4 is formed in a constricted shape.

"Problems to be solved by the invention" By the way, the above cylindrical wall body has the following problems.

Even if the middle pillar that connects the branch segments is formed with a constriction, it is not possible to provide a wide passage for connecting the left and right sides (up and down in the vertical type) of the tubular wall body used for ventilation and movement of personnel. thing.

Due to the weight of the middle pillar, a large amount of labor is lost when constructing the cylindrical wall and transferring the middle pillar.

Since the connection between the branch segment and the middle pillar is done by bolting the joint fitting, it is necessary to bury the joint fitting in the joint surface of the branch segment and the middle pillar, which is costly.

Since the connection between the branch segment and the center pillar is performed by bolting the joint fittings, it is necessary to perform secondary winding on these joint fittings, which is costly.

The present invention has been made in view of the above circumstances, and an object of the present invention is that a communication passage can be widely provided between opposing branch segment segments, and a middle pillar is lightweight,
In addition, it is to realize a tubular wall body for lining an excavation hole that does not use a special fitting for connecting the branch segment and the middle pillar.

"Means for Solving the Problems" The present invention has been made to solve the above problems, and in claim 1, arcuate plate-shaped segments are assembled in the circumferential direction and have openings along the axial direction. A plurality of cylindrical main wall portions are formed, and these main wall portions are connected to each other through the branch portion segment at one end and the other end of the opening in a state where the opening is opposed to each other,
A middle pillar is built between these opposing branch segment segments, and in a cylindrical wall body for lining an excavation hole in which these are connected in the axial direction, in the widthwise central portion of the middle pillar, An opening extending in the direction crossing the tubular wall body and along the longitudinal direction of the tubular wall body is formed between both end portions, and the tubular wall body is also provided at the connecting end portion of the branch segment to the center pillar. Openings are formed in a direction crossing the openings, bolt insertion holes penetrating between the openings are formed in the middle pillar and the branch segment, respectively, and the bolts inserted in the bolt insertion holes are fastened with nuts. As a result, the center pillar and the branch segment are joined together.

Further, in claim 2, the branch segment is a steel segment and the center pillar is also made of steel,
An opening extending in the direction transverse to the tubular wall body and along the longitudinal direction of the steel middle pillar is formed between both ends, and the middle pillar of the branch steel segment is formed. Openings are also formed in the connecting ends to the tubular wall body, respectively, and joint plates for connecting to each other are provided at the connecting ends of both of them. Bolt insertion holes that communicate with both openings are formed in these joint plates, and the bolts inserted into the bolt insertion holes are fastened with nuts to join the steel middle pillar and the branch steel segment. It is characterized by that.

[Operation] According to the cylindrical wall for lining the excavation hole of the present invention, since the opening is formed in the center pillar, the opening is formed on the left and right of the cylindrical wall in the horizontal type and in the vertical type. It can be used as a wide passage that connects the upper and lower sides, and even if the width of the center pillar is made as large as the branch segment to form an opening in the center in the width direction, sufficient strength can be maintained while maintaining sufficient strength. The weight of the pillar is reduced, and the labor for constructing the cylindrical wall body and transferring the middle pillar is reduced.

Further, it is not necessary to bury the joint metal fittings on the joint surfaces of the branch segment and the center pillar, and the cost associated with the burying and the cost associated with the secondary winding are reduced.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 and FIG. 2 show opposed branch portions RC in the double-walled cylindrical wall body as shown in FIG.
It shows the state near one of the segments, and does not show the state near the other branch segment.

In these figures, reference numeral 5 designates a branch RC segment, and 6
Indicates the central pillar.

A rectangular opening 7 is formed in the middle pillar 6 in the direction crossing the cylindrical wall body in the vertical direction. The opening 7 is formed in the center of the center pillar 6 in the width direction and extends in the longitudinal direction between both ends. In addition, a hole (opening) 8 is formed in the connecting end portion of the branch RC segment 5 to the middle pillar 6 in a direction crossing the tubular wall body. The opening 7 and the hole 8 are set to have a size that does not impair the strength of the center pillar 6 and the branch RC segment 5, respectively.

In addition, bolt insertion holes 9 and 10 penetrating from the opening 7 to the hole 8 are formed in the branch RC segment 5 and the center pillar 6, respectively.

Then, the bolts 11 and 11 are inserted into the bolt insertion holes 9 and 10, respectively, and the nuts 12 and 12 located in the holes 8 are fastened to the bolts 11 and 11, respectively.
RC segment 5 is consolidated.

Also, in this embodiment, bolt insertion holes 13 and 13 penetrating to the mutual holes 8 are formed in the branch RC segment 5 and the branch segment 5 (not shown) adjacent thereto, and these bolt insertion holes 13 and 13 are formed. By utilizing the connection, the adjacent branch segments 5, 5, ... Are bolted to each other.

Next, the effect of the tubular wall body configured as described above will be described.

In the above cylindrical wall body, since the opening 7 is formed in the middle pillar 6, it is possible to use this opening 7 as a passage that connects the left and right of the cylindrical wall body. It is possible to provide a passage wider than the tubular wall body having the constriction.

Further, even if the width of the center pillar 6 is made to be equal to that of the branch RC segment 5 and the opening 7 is formed at the center in the width direction as in this embodiment, the weight of the middle pillar 6 can be maintained while maintaining sufficient strength. Is lightened, and labor loss at the time of constructing the cylindrical wall body and transferring the middle pillar 6 is reduced.

Furthermore, since the bolts 11 and the nuts 12 inserted into the holes 9 and 10 are used to connect the branch RC segment 5 and the center pillar 6, the joint surfaces of the branch RC segment 5 and the center pillar 6 are connected to each other. Since it is not necessary to bury joint fittings and to perform secondary winding on these joint fittings, the costs associated with burying and secondary winding can be reduced.

In the above tubular wall body, the adjacent branch RC segments 5 are also bolted together by using the holes 11 and 11, therefore, the joint metal fittings are embedded also in the joint surfaces of these RC branch segments 5. Since it is not necessary to perform secondary winding on these joint fittings, the costs associated with burying and secondary winding can be reduced.

Next, another embodiment of the present invention will be described with reference to FIGS.

In the tubular wall body of this embodiment shown in FIG. 4, the main wall portion 2
The branch segments 21 that connect one ends and the other ends of the openings 20a of the holes 0 and 20 and the center pillar 22 that is built between the branch segments 21 are both made of steel. Note that the segments forming the main wall portion 10 can be either steel or RC similarly.

Bifurcation segment 21 or bifurcation steel segment
As shown in FIG. 4 to FIG. 6, 21 is a pair of substantially Y-shaped main girders 23, 23 arranged opposite to each other, and a main girder 23,
End plates 24, 24 welded to both ends of 23 and these main girders 23,
23, a skin plate 25 welded to the outside of the substantially Y-shaped body formed by the end plates 24, 24, and a plurality of (two in this case) ribs 26 bridged between the main girders 23, 23, The main girders 23, 23 are composed of a joint plate 27 welded to the tips of the girders 23, and an opening 28 is formed between the skin plate 25 and the joint plate 26 in a direction crossing the tubular wall body. . Further, bolt insertion holes 29, 29, 30, 30 are formed in the main girders 23, 23 and the joint plate 27, respectively.

On the other hand, the steel pillar 22 (hereinafter abbreviated as pillar 22) is
As shown in the figure, the column main body 31 having a rectangular cross section and the column main body 31
The joint plate 32 having the same shape and size as the joint plate 27, which is welded by closing the upper and lower openings, and a plurality of joint plates 32 welded to the inner surface of the column body 31 and extending in the height direction of the column body 31 (in this case, 2
The ribs 33 of the present invention), and two plate portions 31a in the column main body 31 along the depth direction of the tubular wall body are provided with an opening portion 34 in the transverse direction of the tubular wall body. There is. The opening 34 is formed between the ribs 33 and above and below the column main body 31, and the size thereof is set so as not to impair the strength of the middle column 22.

In addition, the joint plate 32 is formed with a bolt insertion hole 35 that coincides with the bolt insertion hole 30 when the joint plate 32 is superposed on the joint plate 27 on the side of the branch steel segment 21.

Then, the joint plate 32 of the center pillar 22 is superposed on the joint plate 27 of the branch steel segment 21 side so that both bolt insertion holes 30, 35 are aligned with each other, and the continuous bolt insertion holes 30,
The bolts 36, 36 are respectively inserted into the openings 35 of the center pillar 22 in the openings 35, and the openings 28 on the side of the branch steel segment 21 are inserted.
By fastening bolts 36, 36 with nuts 37, 37 from the side, the center column 22 and the branch steel segment 21 are connected.

In addition, in this embodiment, the branch steel segment 21
The steel segment, which is not shown and is adjacent to the steel segment, is bolted to each other using the bolt insertion holes 29 of the main girder 23.

Also in the present embodiment, since the opening 34 is formed in the center column 22, it is possible to use this opening 34 as a wide passage, and the weight of the center column 22 is reduced, and the cylindrical wall is formed. This has the effect of reducing the loss of labor in constructing the body and transferring the center pillar 22.

"Effect of Device" The tubular wall for lining an excavation hole of the present invention has the following excellent effects.

Since the opening is formed in the center pillar, this opening is
In the horizontal type, the right and left sides of the tubular wall body can be used as a passage connecting the upper and lower sides in the vertical type, and a wider passage can be provided than in the conventional tubular wall body in which the central pillar has a constriction.

Since the opening is formed in the middle pillar, the weight of the middle pillar is lightened, and the labor for constructing the cylindrical wall body and transferring the middle pillar is reduced, and the opening is formed in the center part in the width direction of the middle pillar. Therefore, the strength of the middle pillar can be made sufficient.

Since it is not necessary to bury the joint fittings on the joint surfaces of the branch segment and the center pillar, the cost associated with burying is reduced.

Since the joint metal fittings are not embedded in the joint surfaces of the branch segment and the center pillar, it is not necessary to carry out secondary winding on this portion, and the cost associated with secondary winding is reduced.

[Brief description of drawings]

1 to 3 are views showing an embodiment of the present invention, in which FIG. 1 is an enlarged front view of a connecting portion between a branch RC segment and a center pillar, FIG. 2 is a side view thereof, and FIG. The figure is a perspective view of the middle pillar,
4 to 7 are views showing another embodiment of the present invention. FIG. 4 is a perspective view of the entire tubular wall body, and FIG. 5 is a branch steel segment and a steel middle pillar. FIG. 6 is a side view of the connecting portion, FIG. 6 is a side view thereof, FIG. 7 is a perspective view of a steel middle pillar, and FIGS. 8 to 10 are views showing a conventional example, and FIG. Overall front view of the wall, Fig. 9 shows branch RC
FIG. 10 is an enlarged front view of the connecting portion between the segment and the center pillar, and FIG. 10 is a side view thereof. 1, 20 ... Main wall, 1a, 20a ... Opening, 2 ... RC segment (segment), 5 ... Branching RC segment (branching segment), 6,22 ... Center pillar, 7,28, 34 …… Aperture, 8 …… Hole (opening), 9,10,30,35 …… Bolt insertion hole, 11,36 …… Bolt, 12,37 …… Nut, 21 …… Branch steel segment .

Front page continuation (72) Hirohide Hashimoto, Inventor Hirohide Hashimoto 2-6-21 Yaesu, Chuo-ku, Tokyo Rose Bay Yaesu Building Ishikawajima Kenzai Kogyo Co., Ltd. (56) Reference JP-A-64-33398 (JP, A)

Claims (2)

[Scope of utility model registration request] 1. A tubular wall body for lining an excavation hole, which is arranged in multiple excavation holes and used for lining the excavation hole, wherein arcuate segment segments are assembled in the circumferential direction. A plurality of cylindrical main wall portions having openings along the axial direction are formed, and the main wall portions are arranged such that the openings are opposed to each other, and one end and the other end of the openings are respectively branched via a branch segment. In the tubular wall body for lining the excavation hole, which is connected between these, the middle pillars are built between the opposing branch segment segments, and are further connected in the axial direction, the width of the middle pillars. An opening extending in the direction transverse to the cylindrical wall body and along the longitudinal direction of the tubular body is formed between both ends of the central portion in the direction. , Also opening in the direction crossing the tubular wall Each of the parts is formed, a bolt insertion hole penetrating between both openings is formed in each of the middle column and the branch portion segment, and the bolt inserted in the bolt insertion hole is fastened with a nut,
Cylindrical wall body for lining an excavation hole, characterized in that a middle pillar and a branch segment are joined. 2. The branch segment is a steel segment, and the center column is also made of steel, and the center column in the width direction of the center column made of steel is in the direction crossing the tubular wall body and in the longitudinal direction thereof. An opening extending along the cross section is formed between both ends, and an opening is formed at the end of the branch steel segment connected to the center column, again in a direction crossing the tubular wall body. Joint plates for connecting to each other are respectively provided at the connection end portions of each other, and to these joint plates,
A bolt insertion hole that communicates with both openings is formed, and the bolt inserted through this bolt insertion hole is fastened with a nut, whereby the steel middle pillar and the branch steel segment are joined together. A tubular wall body for lining an excavation hole according to claim 1.