JPH0953393A - Joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize a dimension of a connecting position to the thickness direction to thin a segment, and attain a reduction in cost and an improvement in sealing property. SOLUTION: A joint plate 12 is provided on one segment 1a in the state horizontally protruded from a bonding surface 11. A pair of joint plates 14a, 14b are provided horizontally and in parallel to each other on the other segment 1b with a space of a dimension slightly larger than the thickness dimension of the joint plate 12. The joint plate 14b has a cap nut 18 in a position facing a hole part 17. In the state where the hole parts 17 of the joint plate 12, 14a, 14b are allowed to communicate to each other by bringing the bonding surfaces 11 of the segments 1a, 1b into contact to each other in the state where the joint plate 12 is inserted to the space between the joint plates 14a, 14b, a bolt is inserted to the hole part 17 from the inner surface side and fastened to the cap nut 18 to mutually bond the segments 1a, 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for joining members such as tunnel wall body segments which are joined together in a large number to form a cylindrical tunnel wall body.

[0002]

2. Description of the Related Art A so-called shield construction method in which a cylindrical tunnel wall body is assembled by sequentially joining a large number of segments behind it while excavating a ground of a predetermined depth by a shield machine is not a mainstream tunnel construction method. I'm doing it. The segment is made of reinforced concrete, steel, etc., and its shape is generally an arc-shaped block that is a curved flat plate-shaped one, and as a joint structure for connecting adjacent ones, As shown in FIG. 9, the joint plate 2 embedded along the joint surface of each segment 1 is generally fastened with a bolt 3 and a nut 4.

[0003]

However, in the above joint structure, the joint plate 2 having a large area must be attached in order to sufficiently secure the fastening points by the bolts 3 and the nuts 4, so that the segments 1 are joined together. There is a possibility that it may be difficult to secure a location where the sealing material 5 is provided between the joint surfaces, and sufficient sealing performance may not be obtained. For this reason, the thickness of the segment 1 must be increased in order to secure a sufficient location of the seal material 5 on the joint surface, resulting in an increase in cost. Further, it is necessary to form the bolt box 6 for fastening work. However, when the bolt box 6 is formed, the strength of the outer surface side thereof may be reduced and water leakage may occur. It had to be formed in the same way, which also led to an increase in cost. Moreover, when joining the segments 1 to each other,
The segments 1 are accurately positioned so that the holes of the joint plate 2 communicate with each other, and the bolts 3 are inserted into the holes.
And the nut 4 is applied to the threaded portion of the bolt 3, and the bolt 3 is rotated and screwed into the threaded portion.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a joint structure in which members such as segments to be joined can be made thin and which can be joined very easily. Has an aim.

[0005]

In order to achieve the above object, the joint structure according to claim 1 is a joint structure for joining members in a state where their joint surfaces are aligned with each other, and one member Is provided with a joint plate projecting to the other member side, and the other member is provided with the joint plate provided in one member in the thickness direction when the joining surfaces of the members are brought into contact with each other. It is characterized in that the overlapping joint plates are provided and these joint plates are fastened to each other. Since the joint plates that overlap each other in the thickness direction of the member are fastened to each other, the thickness of the member can be reduced.

In the joint structure according to claim 2, the members are
A joint structure for joining the joining surfaces of the other members together, wherein one member is provided with a joint plate protruding toward the other member side, and the other member is provided with the joining surfaces of the respective members. When contacted, on the front and back of the joint plate provided on one member, a pair of joint plates that overlap in the thickness direction of the member is provided, and these joint plates are fastened together. It has a feature. As a result, the joint plate of the one member and the pair of joint plates of the other member, which are overlapped in the thickness direction of the member on the front and back sides of the joint plate of the one member, are fastened, so that the thickness of the member It is possible to reduce the thickness, and since one joint plate is joined in a state of being sandwiched by the other pair of joint plates, a large joint strength is secured.

According to a third aspect of the present invention, there is provided the joint structure according to the first or second aspect, wherein the joint plate is provided with a hole that communicates with each other when the joint surfaces are brought into contact with each other. The member is provided with a nut into which the bolt inserted into the hole is screwed. Thereby, the members are joined by inserting the bolts into the insertion holes of the joint plates that overlap in the thickness direction of the members and fastening the bolts to the nuts provided on the other member.

According to a fourth aspect of the present invention, there is provided the joint structure according to the third aspect, wherein a tapered portion that is gradually narrowed is formed near the tip of the bolt, and the tapered portion is inserted into the communicating hole of the joint plate. In doing so, the joint plates are attracted to each other by attracting the axis lines of the hole portions by the taper portion. With this, when the bolts are fastened and joined together, the joint plates are attracted to each other by the tapered portion, and a further favorable joined state of the members is secured. The joint structure according to claim 5 is the joint structure according to claim 1, wherein:
It is characterized in that a concave portion and a convex portion that fit with each other are formed, and the side surfaces of the concave portion and the convex portion that come into contact with each other are tapered surfaces. As a result, when the concave portion and the convex portion of the joint plate whose side surfaces are tapered are fitted together, the joint plate is pulled in the sliding direction between the tapered surfaces of the concave portion and the convex portion, and further good joining of the members is achieved. The state is secured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the joint structure according to the present invention will be described below with reference to the drawings. As shown in FIG. 1, on one segment (member) 1 a, a joint plate 12 to which an anchor bar 13 is connected is provided in a state of horizontally protruding from the joint surface 11. The other segment (member) 1b has a pair of joint plates 1 connected to the anchor plate 15.
4a, 14b are arranged horizontally and in parallel with a gap slightly larger than the thickness dimension of the joint plate 12 provided in the one segment 1a, and one joint plate 14a is Is disposed in a recess 16 formed in the inner surface of the segment 1b on the joint surface 11 side.

Further, the joint plate 12 of one segment 1a
In the joint plates 14a and 14b of the other segment 1b, the joint plate 12 is inserted into the gap between the joint plates 14a and 14b, and the joint surfaces 11 of the respective segments 1a and 1b are inserted.
When they are brought into contact with each other, the hole portions 17 that communicate with each other are formed. In addition, the other joint plate 1 of the other segment 1b
A cap nut (nut) 18 is previously fixed to the 4b by welding or the like at a position facing the hole 17.

Then, the respective segments 1a, 1b
When joining them together, the joint plate 12 of one segment 1a is connected to the pair of joint plates 14 of the other segment 1b.
While inserting into the gap between a and 14b, the segments 1a,
1b are brought close to each other, and the respective joint surfaces 11 are brought into contact with each other. In this way, the pair of joint plates 14a, 14b of the other segment 1b are arranged on the front and back sides of the joint plate 12 of the one segment 1a so as to overlap each other in the thickness direction, and the joint plates 12 respectively. , 14a, 14
The holes 17 formed in b are in communication with each other.
In this state, as shown in FIG.
7, the bolt 3 is inserted from the side of the recess 16 and screwed into the cap nut 18 provided on the other segment 1b to be fastened, so that the segments 1a and 1b are in contact with the joint surface 11. Are joined to form a tunnel wall body 20 as shown in FIG. Note that FIG.
In the above, reference numeral 21 indicates the respective segments 1a, 1
It is a sealing material which is disposed in the groove portion 22 formed in the joint surface 11 of b and seals at the joint portion.

As described above, according to the joint structure of the above-described embodiment, the joint plate 12 of the one segment 1a and the joint plates 14a and 14b of the other segment 1b are superposed in the thickness direction. Since the joint plates 12, 14a, 14b are fastened and fixed by the bolt 3 and the cap nut 18, the thickness of the joint portion can be reduced. As a result, the segment 1 can be thinned and the cost can be reduced. In addition, since the size of the joint portion in the thickness direction can be reduced, the disposing surface of the sealing material 21 provided on the joint surface 11 can be made large in the thickness direction without increasing the thickness of the segment 1. As a result, it is possible to significantly improve the waterproofness at the joint between the segments 1 and to construct the highly reliable tunnel wall body 20.

Further, the joint plate 12 of the one segment 1a
The pair of joint plates 14a, 14 of the other segment 1b.
By inserting into the gap between b, each segment can be positioned and the bolt 3 can be joined simply by screwing it from the inner surface side, so that the labor required for the joining work can be greatly reduced. You can Further, by fastening the bolt 3, the joint plate 12 of one segment 1a is clamped by the pair of joint plates 14a, 14b of the other segment 1b, and the segments 1a, 1b are joined together with a large joining force. You can

FIG. 4 shows the other segment 1b.
In addition, the joint structure is provided with one joint plate 14 to which the anchor bar 13 is connected. According to this joint structure, the structure can be simplified and the number of constituent parts can be further reduced. The cost can be reduced. Further, what is shown in FIG. 5 is that in which the joint plates 12 and 14 in the joint structure shown in FIG. 4 are formed with concave portions 31 and convex portions 32 which have tapered side surfaces and are fitted to each other. According to the above, when the concave portion 31 and the convex portion 32 are fastened together by the bolt 3 and the concave portion 31 and the convex portion 32 are fitted to each other, the side surfaces of the concave portion 31 and the convex portion 32 are tapered surfaces, so that they are attracted to each other and the segments 1 are joined together. Further, it is possible to surely bond and improve the sealing property.

Further, FIG. 6 shows another joint structure. On the other segment 1b, the cap nut 18
In place of the cap nut 18, a hole 41 is formed at a position where is provided, and a nut 42 communicating with the hole 17 is welded and fixed to one joint plate 14a. Further, the bolt 3 used in this joint structure is formed with an external thread 43 shorter than the internal thread of the nut 42, and a pin portion 44 is formed on the tip side. Further, a tapered portion 45 which is gradually narrowed is formed near the tip of the pin portion 44.

Then, the respective segments 1a, 1b
When joining them together, the joint plate 12 of one segment 1a is connected to the pair of joint plates 14 of the other segment 1b.
While inserting into the gap between a and 14b, the segments 1a,
1b are brought close to each other, and the respective joint surfaces 11 are brought into contact with each other. In this state, as shown in FIG. 7, the pin portion 44 of the bolt 3 is inserted into the communicating hole portion 17 from the recess 16 side, and as shown in FIG. 8, the male screw 43 is screwed into the nut 42 for fastening. By each segment 1
The a and 1b are joined together with the joining surfaces 11 in contact with each other. Here, according to this joint structure, since the tapered portion 45 which is gradually narrowed is formed in the vicinity of the tip of the pin portion 44 of the bolt 3, when the tapered portion 45 is inserted into the communicating hole 17, , Joint plate 12 and joint plates 14a, 1
4b are attracted to each other, and the segments 1 can be more reliably joined to each other to improve the sealing property.

[0017]

As described above, according to the joint structure of the present invention, the following effects can be obtained. Claim 1
According to the joint structure described, in the state where the joint surfaces of the respective members are in contact with each other, the joint plates which are overlapped in the thickness direction of the members are fastened to each other so that the respective members are joined,
The thickness of the joint can be reduced. As a result, the member can be made thinner and the cost can be reduced. Further, since the size of the joint portion in the thickness direction can be reduced, for example, the surface where the sealing material is provided on the joint surface can be increased in the thickness direction,
As a result, it is possible to significantly improve the waterproofness at the joint between the members and to construct a highly reliable structure.

According to the joint structure of the second aspect, the respective members can be positioned by inserting the joint plate of one member into the gap between the pair of joint plates of the other member. The joint plate of one member can be sandwiched by the pair of joint plates of the other member, and the members can be joined together with a large joining force. According to the joint structure of the third aspect, it is possible to join by simply screwing the bolt into the hole. Therefore, the labor required for joining work can be significantly reduced. Further, since the nut into which the bolt is screwed is provided in advance, it is possible to reduce the number of parts to be prepared at the site and to reduce the work such as carrying in and preparing the parts.

According to the joint structure of the fourth aspect, when the bolts are fastened and joined, the joint plates are attracted to each other by the taper portion, so that a better joint state of the members can be secured, and It is possible to improve the sealing property. According to the joint structure of claim 5, by fitting the concave portion and the convex portion of the joint plate whose side surfaces are tapered surfaces, the joint plate is pulled in the sliding direction between the tapered surfaces of the concave portion and the convex portion. As a result, it is possible to secure an even better joined state between the members, and it is possible to further improve the sealing property.

[Brief description of drawings]

FIG. 1 is a sectional view of a joint portion for explaining a joint structure according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a joint portion in a joined state for explaining the joint structure according to the embodiment of the present invention.

FIG. 3 is a plan view seen from the inner surface of the tunnel wall body constructed by joining the segments to each other by the joint structure according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of a joint portion in a joined state for explaining the joint structure of another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a joint portion in a joined state for explaining a joint structure according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a joint portion for explaining a joint structure according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view of a joint portion for explaining the joint structure of another embodiment of the present invention.

FIG. 8 is a cross-sectional view of a joint portion in a joined state, which illustrates a joint structure according to another embodiment of the present invention.

FIG. 9 is a cross-sectional view of a joint portion in a joined state for explaining a conventional joint structure.

[Explanation of symbols]

 1, 1a, 1b Segment (member) 3 Bolt 11 Joining surface 12, 14, 14a, 14b Joint plate 17 Hole portion 18 Cap nut (nut) 31 Recessed portion 32 Convex portion 45 Tapered portion

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Masayoshi Yasumoto 1-7-1 Kyobashi, Chuo-ku, Tokyo Within Toda Construction Co., Ltd. (72) In-house Yasuhiko Asai 1-7-1 Kyobashi, Chuo-ku, Tokyo No. Toda Construction Co., Ltd.

Claims (5)

[Claims] 1. A joint structure for joining members in a state where their joint surfaces are aligned with each other, wherein one member is provided with a joint plate protruding toward the other member, and the other member is provided. , When the joint surfaces of the respective members are brought into contact with each other, the joint plate provided on one member is provided with a joint plate overlapping in the thickness direction of the member, and these joint plates are fastened together. Characteristic joint structure. 2. A joint structure for joining members together with their joint surfaces aligned, wherein one member is provided with a joint plate projecting to the other member side, and the other member is provided. , A pair of joint plates, which overlap each other in the thickness direction of the member, are provided on the front and back sides of the joint plate provided on one member when the joint surfaces of the respective members are brought into contact with each other. A joint structure characterized in that plates are fastened together. 3. The joint plate is provided with a hole communicating with each other when the joining surfaces are brought into contact with each other, and the other member is provided with:
3. A nut for screwing the bolt inserted into the hole is provided.
The described joint structure. 4. The bolt has a tapered portion gradually narrowed near the tip, and when the bolt is inserted into the communicating hole of the joint plate, the tapered portions allow the axial lines of the holes to meet each other. The joint structure according to claim 3, wherein the joint plates are attracted to each other by attracting the joint plates. 5. The joint plate is formed with recesses and protrusions that fit with each other, and side surfaces of the recesses and protrusions that abut each other are tapered. The joint structure described.