JPH10220183A - Segment joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate joint work between segments and thereby enhance work efficiency. SOLUTION: A male joint 3 is provided on a joint area of a male segment while a female joint 4 is provided on a joint area of a female segment. The female joint 4 is constituted with a locking board 13 having a notched part 12. A bolt 9 mounted with a spacer 22 is vertically provided on a base board by way of a washer 21, thereby constituting the male joint 3. Each joint area of the segments is arranged to slide. While the bolt 9 is being fitted in the notched part 12 of the locking board 13 of the female joint 4, the locking board 13 is fitted in between the base board and the head 11 of the bolt 9 so that the head 11 of the bolt 9 may be locked with the rear side of the locking board 13. A support member 22 is provided on the opposite side to the locking direction between the spacer 22 and the locking board 13 so as to receive a bending force which may add to the bolt 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure of segments that form a cylindrical wall in the axial direction of a digging hole by mutually connecting a plurality of holes.

[0002]

2. Description of the Related Art As a method of constructing a tunnel, a so-called shield method is generally employed, in which a segment (mainly made of concrete or steel) is assembled on the inner surface side of an excavation hole to construct a cylindrical wall. As the segments used in the shield method, those having a rectangular shape in a plan view and an arc plate shape are mainly used, and these segments are joined together by bolts. When joining the segments by the bolts, a joint plate having holes communicating with each other when the joint surfaces of the segments are brought into contact with each other is buried in the vicinity of the joint surface of the segments. In general, a bolt is inserted into a hole of the above, and a nut is fastened and joined to the bolt. Further, there is also a structure in which an insert fitting as a nut member is embedded in each segment, and bolts penetrating adjacent segments are fastened to each other for joining.

[0003]

However, in the above structure, a bolt is inserted into a hole formed in a joint surface of a joint at a construction site, and a nut is fastened to the bolt or embedded in a mutual segment. Since an extremely complicated operation of fastening bolts to the insert fittings is required, there is a limit in shortening the assembling time, and adaptation to automatic assembling by a robot has been difficult. Furthermore, even if the secondary lining is omitted, it is necessary to close the bolt box formed in the segment in order to install the bolt and nut, and a new joint is aimed at speeding up the construction and saving labor. At present, the development of the structure was urgently needed.

[0004] The present invention has been made in view of the above circumstances, and has as its object to provide a joint structure of segments that can easily and surely join segments to each other.

[0005]

In order to achieve the above object, a joint structure for a segment according to the first aspect of the present invention is characterized in that the joining surfaces of the segments are slid by sliding the joining surfaces of the segments. In a joint structure, one of the joining surfaces is formed with a base plate, a rod erected on the base plate, and a diameter larger than the rod provided at the tip of the rod. A male joint consisting of a locking portion and a notch portion on which the rod body can be fitted from the side is formed on the other joint surface, and the rod body is slid into the notch portion and fitted. A female joint comprising a locking plate that locks the locking portion on the back side by being fitted between the locking portion of the rod and the base plate, and the rod includes:
A spacer is provided for securing a space between the base plate and the locking portion, and the spacer has a bending force applied to the rod body on a side opposite to a direction in which the locking plate is fitted to the rod body. It is characterized in that a supporting portion for receiving is provided.

[0006] The joint structure of the segment according to claim 2 is
2. The segment joint structure according to claim 1, wherein the spacer bends a metal plate having substantially the same width as the thickness of the locking plate into an arc shape on one side and a rectangular shape on the other side. The rod is inserted into the arc-shaped portion, and the rectangular portion is the supporting portion. The joint structure of the segment according to claim 3 is the joint structure of the segment according to claim 1, wherein the spacer is a metal block having substantially the same thickness as the thickness of the locking plate; It is characterized in that it has a through hole that can be inserted, and the support portion is made of a solid portion of a metal block.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a segment joint structure according to the present invention. 1 to 4, reference numeral 1 denotes a segment. This segment 1
Is a concrete segment formed in a trapezoidal shape in plan view, and the circumferential joining surface 2 is formed of an arcuate plate inclined with respect to the axial direction of the excavation hole, respectively, and is joined in the circumferential direction. By doing so, a ring constituting the cylindrical wall body is constructed. These segments 1 are composed of a male segment 1A and a female segment 1B, and the male segments 1A and the female segments 1B are alternately connected in the circumferential direction. The male segment 1A is provided with a male joint 3, and the female segment 1B is provided with a female joint 4 to which the male joint 3 of the male segment 1A is joined.

As shown in FIGS. 5 and 6, the male joint 3
A base plate 6 having a hole 5 formed substantially at the center, a cap nut 7 fixed at a communication position with the hole 5 on the back side of the base plate 6, and a back nut fixed to the back side of the base plate 6. A pair of side plates 8 and bolts (rods) that are inserted into the holes 5 from the surface side of the base plate 6 and fastened to the cap nuts 7 so that the base plate 6 is protruded from the base end as a base.
9, and the side plate 8 is provided with an anchor 10 for fixing the male joint 3 to the segment 1. The head 11 of the bolt 9 of the male joint 3 serves as a locking portion.

The bolt 9 of the male joint 3 has a washer 2
1, a spacer 22 is mounted on the bolt 9 via the washer 21. The spacer 22 supports the washer 21 under the head 11 of the bolt 9, and the head 9 of the bolt 9 The space between the bottom and the base plate 6 is secured to a predetermined size. The washer 21 attached to the bolt 9 is formed of a harder material than a later-described locking plate 13 constituting the female joint 4 and has a lower end formed at an acute angle across the circumferential direction.
This washer 21 is a cutting part.

The spacer 22 attached to the bolt 9
Has a bolt insertion portion 22a through which the bolt 9 is inserted, and a support portion 22b provided integrally with the bolt insertion portion 22a, as shown in FIGS. The spacer 22 is formed by bending a band-shaped metal plate having substantially the same width as the thickness of the locking plate 13 described later on one side into an arc shape and the other side into a rectangular shape. . That is, it is formed by bending an intermediate portion of a metal plate into an arc shape, bending portions near both ends at right angles in a direction approaching each other, and connecting both ends to each other by welding. On both sides of the spacer 22, projecting parts 22c projecting inward are formed in the middle part, and the bolt 9 is inserted through a part surrounded by the projecting part 22c and the arc-shaped part. A rectangular portion which is formed as the bolt insertion portion 22a, bent in a direction approaching each other and joined by welding is formed as the support portion 22b.
The b side is disposed between the washer 21 and the base plate 6 on the side opposite to the fitting direction with the female joint 4.

The female joint 4 is, as shown in FIGS.
It has a locking plate 13 in which a notch 12 is formed, and a pair of side plates 14 are fixed to the back side of the locking plate 13,
An L-shaped bottom plate 15 is provided between the side plates 14. The side plate 14 is provided with an anchor 16 for fixing the female joint 4 to the segment 1. The notch 12 of the locking plate 13 of the female joint 4 is formed in a tapered shape in which the vicinity of the end gradually widens toward the end.
On the back surface side of the locking plate 13 near the end of the notch 12, a tapered surface 17 is formed which is inclined from the end to the direction of increasing the thickness. And the base plate 6 of the male joint 3
And a washer 2 supported under the head 11 of the bolt 9
The size of the bottom of the female joint 1 is substantially the same as or slightly larger than the thickness of the locking plate 13 constituting the female joint 4 having the above-described configuration.

To join the male segment 1A having the male joint 3 and the female segment 1B having the female joint 4, the male segment 1A and the female segment 1B are slid together. Female segment 1
The bolt 9 constituting the male joint 3 of the male segment 1A is engaged with the notch 12 of the engaging plate 13 constituting the female joint 4 of B. In this way, the bottom of the washer 21 supported by the lower part of the head 11 of the bolt 9 abuts against the tapered surface 17 of the locking plate 13, and is guided in the direction of inclination of the tapered surface 17, and Get into the side. When the bottom of the washer 21 enters the back surface of the locking plate 13 as described above, the back surface of the locking plate 13 is shaved by the cut portion of the washer 21.

Then, the male joint 3 is drawn toward the female joint 4 together with the bolt 9, and the male segment 1A and the female segment 1B are firmly pressed against each other as shown in FIG. Joined. In addition, a part of the locking plate 13 that is cut at the time of joining is formed by the locking plate 13 and the washer 2.
1 between these male joints 3
And the female joint 4 are firmly joined.

Here, as described above, when the bolt 9 constituting the male joint 3 is fitted into the notch 12 of the locking plate 13 constituting the female joint 4, the bolt 9 is moved in the fitting direction. Although a bending force is applied, the spacer 22 provided on the bolt 9 has a support portion 22 interposed between the washer 21 provided on the bolt 9 and the base plate 6 on the side opposite to the fitting direction.
Since b is provided, the bending force applied to the bolt 9 is received by the support portion 22b. In other words, when the spacer 22 having the support portion 22b is not mounted or when a cylindrical spacer is mounted, the bolt 9 is deformed at the time of fitting with the locking plate 13 as shown in FIG. In the case of the embodiment, as described above, since the bending force applied to the bolt 9 is received by the support portion 22b of the spacer 22 mounted on the bolt 9, the deformation of the bolt 9 is reliably prevented.

As described above, according to the joint structure of the segment of this embodiment, the male segment 1A is inserted into the cutout 12 formed in the locking plate 13 of the female joint 4 of the female segment 1B. By inserting the bolt 9 provided on the male joint 3, the head 11 of the bolt 9 is very easily locked on the back side of the locking plate 13 via the washer 21, and the male segment is formed by the locking force. 1A and female segment 1B can be joined circumferentially to form a ring. As a result, the labor required for joining the segments 1 to each other can be greatly reduced and the robot can be easily assembled automatically, as compared with a conventional bolt / nut fastening structure or a fastening structure for fastening a bolt to an insert. Since there is no bolt box or the like, the work of closing the bolt box can be omitted.

A spacer 22 is attached to the bolt 9 and regulates the amount of screwing of the bolt 9 into the base plate 6. The spacer 22 b receives a bending force received by the bolt 9 when fitted to the locking plate 13. Is provided, it is possible to reliably prevent the deformation of the bolt 9 due to the bending force, whereby the bolt 9 and the locking plate 13 can be satisfactorily fitted. In other words, it is possible to reliably prevent the fitting failure with the locking plate 13 due to the deformation of the bolt 9.

Moreover, the notch 1 of the locking plate 13 of the female joint 4
The back surface in the vicinity of 2 is a tapered surface 17, and the head 11 of the bolt 9 of the male joint 3 is guided by the tapered surface 17 to the rear surface of the locking plate 13. The head 11 of the female joint 4
3, the female joint 4 and the male joint 3 are attracted to each other so that the joint surface 2 of the female segment 1B and the joint surface 2 of the male segment 1A are extremely strongly joined. Can be.

At the time of joining, the locking plate 13 of the female joint 4 is shaved by a washer 21 provided on the bolt 9 of the male joint 3, and the male joint 3 and the female joint 4 are firmly joined. Thereby, the joining surface 2 of the female segment 1B and the joining surface 2 of the male segment 1A can be joined very firmly.

FIGS. 11 and 12 show a spacer 22 having another structure. This spacer 22 is used for the locking plate 1.
Blocks made of metal, etc., with a thickness almost the same as the thickness of 3,
A bolt insertion portion 22a through which the bolt 9 is inserted is formed, and a part thereof is used as a support portion 22b. Further, according to the spacer 22, since the support portion 22b is intact, the bending force applied to the bolt 9 can be more reliably received.

In the above example, the head 1 of the bolt 9 is used.
1 is provided with a washer 21 for shaving the locking plate 13 at the time of joining, but the head 1 of the bolt 9 is provided without the washer 21.
1, the locking plate 13 may be shaved. In addition, the segments 1 to be joined in the above embodiment are not limited to those made of concrete, and may be made of steel.

[0021]

As described above, according to the segment joint structure of the present invention, the following effects can be obtained. According to the joint structure of the segment according to claim 1, by inserting the rod provided on the male joint from the side into the notch formed in the locking plate of the female joint,
The locking part at the tip of the rod is locked to the back side of the locking plate,
The segments can be joined together by the locking force. As a result, compared to the conventional bolt-and-nut fastening structure or the fastening structure for fastening a bolt to an insert, the labor required for joining the segments can be significantly reduced and the robot can be easily assembled automatically. In addition, since there is no bolt box or the like, the work of closing the bolt box can be omitted. In addition, since the spacer mounted on the rod is provided with a supporting portion for receiving the bending force received by the rod when the spacer is fitted to the locking plate, deformation of the rod at the time of fitting with the locking plate is provided. Can be reliably prevented, so that the rod body and the locking plate can be properly fitted. That is, it is possible to reliably prevent a defective fitting with the locking plate due to the deformation of the rod.

According to the joint structure of the second aspect, since the spacer is formed by bending the metal plate, the spacer can be easily manufactured and the cost can be reduced. be able to. According to the joint structure of the segment according to the third aspect, since the solid portion of the metal block is used as the support portion, the bending force applied to the rod can be more favorably received by the support portion.

[Brief description of the drawings]

FIG. 1 is a plan view of segments joined to each other for explaining a joint structure of segments according to an embodiment of the present invention.

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

FIG. 3 is a perspective view of a male segment having a male joint for describing a joint structure of the segment according to the embodiment of the present invention.

FIG. 4 is a perspective view of a female segment having a female joint for describing a joint structure of the segment according to the embodiment of the present invention.

FIG. 5 is a perspective view of a male joint and a female joint for explaining the joint structure of the segment according to the embodiment of the present invention.

FIG. 6 is a sectional view of a male joint and a female joint illustrating a joint structure of a segment according to an embodiment of the present invention.

FIG. 7 is a perspective view of a bolt and a spacer for explaining a configuration and a shape of a spacer used for a joint structure of a segment according to an embodiment of the present invention.

FIG. 8 is a plan view of a spacer illustrating a configuration and a shape of a spacer used in a joint structure of a segment according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view of a joint portion of the segment for explaining a joint structure of the segment according to the embodiment of the present invention.

FIG. 10 is a schematic side view of a joint explaining a state of the bolt at the time of joining when the spacer used in the joint structure of the segment according to the embodiment of the present invention is not attached to the bolt.

FIG. 11 is a perspective view of a bolt and a spacer for explaining another example of the spacer used in the joint structure of the segment according to the embodiment of the present invention.

FIG. 12 is a plan view of a spacer for explaining another example of the spacer used for the joint structure of the segment according to the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 segment 1A male segment 1B female segment 2 joint surface 3 male joint 4 female joint 6 base plate 9 bolt (rod) 11 head (locking portion) 12 notch 13 locking plate 22 spacer 22b support

Continued on the front page (72) Inventor Okayama Shou Ishikawashima Building Materials Co., Ltd. 1-12-1 Yurakucho, Chiyoda-ku, Tokyo (72) Inventor Nakano Akihiko 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Kenta Matsubara 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Co., Ltd. Obayashi Corporation Tokyo Head Office (72) Inventor Toshio Kobayashi 1040 Hoshiyama, Fujinomiya-shi, Shizuoka 4 Kobayashi Corporation Inside

Claims (3)

[Claims] 1. A joint structure of a segment in which segments are joined to each other by sliding the joining surfaces of the segments, wherein one joining surface has a base plate and an upright standing member mounted on the base plate. And a male joint consisting of a locking body formed at the tip of the rod body and having a larger diameter than the rod body, and the rod body is provided on the other joint surface. A notch portion that can be fitted from the side is formed, and the rod is slid into the notch and fitted into the gap between the locking portion of the rod and the base plate, whereby the rod is inserted. A female joint comprising a locking plate for locking the locking portion to the back surface side, wherein the rod body is provided with a spacer for securing an interval between the base plate and the locking portion; Bending on the rod body on the side opposite to the fitting direction of the locking plate to the rod body. Joint structure of a segment, wherein a support portion is provided for receiving the. 2. The spacer is formed by bending a metal plate having substantially the same width as the thickness of the locking plate by bending one side into an arc shape and the other side into a rectangular shape. The joint structure for a segment according to claim 1, wherein the rod is inserted through an arc-shaped portion, and a rectangular portion is used as the support portion. 3. The spacer is formed by forming a through hole through which the rod can be inserted in a metal block having substantially the same thickness as the thickness of the locking plate. The joint structure for a segment according to claim 1, comprising a solid portion of (1).