JP2003343196A - Coupling structure for steel segment with pre-filled concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To contribute to laborsaving construction and the simplification of a structure by reducing or dispensing with bolt fastening work and work for filling in a hole of a bolt box, in terms of a steel segment with pre-filled concrete. <P>SOLUTION: The steel segment 10 is constituted in such a manner that the pre-filled concrete is infilled into a steel shell 10a which is composed of an outer main beam 11, an inner main beam 11a, joint plate 13 and a skin plate 14; and a male joint 17a is equipped with an engaging protrusion 20 which is composed of a shank 20a, whose base end if fixed to a joining plate 18, and a head part 20b. A female joint 17 has an engaging hole 19 which is composed of an opening 19a into which the head part 20b of the male joint 17a can be inserted, and a locking part 19b into which the shank 20a can be fitted. Tapers 21a and 21c, whose diameters are reduced in one circumferential direction of the tunnel, and tapers 21b and 21d, whose diameters are reduced to the side of the base end of the shank 20a in the axial direction of the tunnel, are provided in the shank 20a and the locking part 19b, in which the rear part of the engaging hole 19 is made to serve as a closed space 23. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to concrete used when constructing a water supply / sewerage system, a subway, a tunnel for housing a telegraph cable, a water discharge tunnel, or a tunnel (pipe) such as a common ditch or an underground passage by a shield construction method. The present invention relates to a solid steel segment and a joint structure between the segments.

[0002]

2. Description of the Related Art Here, a concrete-filled steel segment refers to a steel shell formed by assembling steel sheets by welding or the like, or a steel shell formed by casting and filled with concrete. A conventional concrete solid-filled steel segment will be described with reference to FIG. 8. The main girders 1 are connected by a plurality of vertical ribs 2 arranged at predetermined intervals, and the ends of the main girders 1 are connected by a joint plate 3. Further, the main girder 1 and the joint plate 3 are combined with the skin plate 4 on the ground side to form a steel shell, and the inside of the steel shell is filled with the filled concrete 5, and the inside of the filled concrete 5 is formed. A reinforcing wire mesh 6 having a small diameter is embedded in the metal wire, and the end portion of the reinforcing wire mesh 6 is welded to the inner surface of the steel shell. Further, the skin plate 4 is provided with a concrete injection hole and an erector mounting hole 8.

The connection between the segments (in the circumferential direction of the tunnel) and the rings (in the axial direction of the tunnel) of the concrete solid-filled steel segments is performed by inserting a connecting bolt into a bolt hole 7 formed in the joint plate 3 and the main girder 1. In addition, the nut is fastened in the steel shell. In this case, in the steel shell, the bolt box 1
0 is formed.

[0004] In concrete filled steel segments, various measures have been taken in order to rationally connect the segments (in the circumferential direction of the tunnel) and reasonably perform the joining work. This prior art includes, for example, the following four examples (Japanese Patent Laid-Open Publication).

Japanese Patent Laid-Open No. 7-252994 (Title of Invention
Concrete filled steel segments) require bolted joints as joints connecting the segments. Therefore, a bolt fastening operation is required, and a bolt box hole filling operation is also required after the segments are assembled.

In Japanese Patent Laid-Open No. 2000-328889 (name of invention / joint structure of segments), the joint structure between the concrete segments is a fitting structure of a female joint and a male joint. The shaft portion does not have a taper in two directions, which is different from the present invention in this respect, and the method of fixing the joint to the concrete segment body is also different.

Japanese Unexamined Patent Publication No. 8-284595 (Title of Invention
In the tunnel segment), the joint structure between the segments is a dovetail groove type fitting structure, and the shaft portion does not have a wedge function as in the present invention described later, and is different from the present invention in these points.

Japanese Unexamined Patent Publication No. 9-144491 (Title of Invention)
In the composite segment), the joint structure between the segments is a fitting structure of a hook-shaped male part and a female part formed of an opening with which the hook engages, but the shaft part of the present invention described later has a wedge function. The present invention is different from the present invention in these points.

[0009]

DISCLOSURE OF THE INVENTION The present invention is to improve the drawbacks of the prior art described above. The first object is to reduce or eliminate the bolt fastening work and the bolt box hole filling work (the entire segment is the bolt box). It is possible to contribute to labor-saving construction.

[0010]

In order to solve the above problems, the present invention is constructed as follows.

A first aspect of the present invention is a steel segment which is constructed by filling a filled concrete in a steel shell consisting of a main girder, a joint plate and a skin plate, and connecting the segments by a male joint and a female joint. In the above, the male joint is configured by fixing a connecting shaft having a head at the tip to a joint plate, and the female joint has an engaging hole for engaging the male joint in a joint plate which also serves as a joint plate. The engaging hole has an opening into which the head of the male joint can be inserted, and a locking portion that communicates with the opening and into which the shaft of the male joint can be fitted. The portion and the engaging portion of the engagement hole are characterized by having a taper that reduces in diameter in one direction of the tunnel circumference and a taper that reduces in diameter in the tunnel axial direction toward the base end side of the shaft portion.

In a second aspect based on the first aspect, a water blocking rear frame is fixed to the rear side of the joint plate to form a closed space for positioning the head of the male joint. The female joint is configured in a box shape.

A third aspect of the present invention is a steel segment, which is constructed by filling a filled concrete in a steel shell consisting of a main girder, a joint plate and a skin plate, and connecting the segments by a male joint and a female joint. In, the male joint is configured by fixing a connecting shaft having a head at the tip to a joint plate, and the female joint engages the male joint with the joint plate and the reinforcing plate fixed to the joint plate. The engaging hole is formed by opening an opening into which the head of the male joint can be inserted, and a locking portion that communicates with the opening and into which the shaft of the male joint can be fitted. Have,
The shaft portion and the engaging portion of the engagement hole are characterized by having a taper that reduces in diameter in one direction of the circumference of the tunnel and a taper that reduces in diameter in the tunnel axial direction toward the base end side of the shaft portion.

In a fourth aspect based on the third aspect, a closed space in which the head of the male joint is located is formed by fixing a water blocking rear frame to the rear side of the reinforcing plate. Characterize.

In a fifth aspect based on any one of the first to fourth aspects, the female joint is fixed to the main girder so as to transmit the separation stress acting between the segments to the main girder. Is characterized by.

[0016]

In the present invention, the connecting work between the steel segments is
This is performed by moving the segment in two directions, the tunnel circumferential direction and the tunnel axis direction. That is, when connecting the segments, first, the heads of the male joints are inserted into the openings of the engaging holes of the female joints by moving the segments toward the adjacent segments in the tunnel circumferential direction. Secondly, by moving in the tunnel axis direction, the engaging portion communicating with the opening is
Fit the shaft of the male joint.

At this time, a taper formed in the locking portion of the engaging hole of the male joint and the engaging hole of the female joint and reducing in diameter in one direction of the tunnel circumference, and a taper toward the base end side of the shaft portion in the tunnel axial direction. The heads of the male joints are
It resists by fitting into the locking portion of the female joint, and at this time, the wedge strength of the tapered portion of the male joint and the female joint improves the joint strength between the segments, and rattling does not occur.

Further, since the segments have a connecting structure by fitting the male joint and the female joint described above, firstly, the bolt fastening work and the bolt box hole filling work are reduced or
It can be unnecessary (when the entire segment is made without a bolt box), which can contribute to labor-saving construction. Also, by fixing the female joint to the main girder, the separation force acting on the segment can be reliably received by the main girder.
The consideration for the strength of the joint plate can be reduced.

[0019]

DETAILED DESCRIPTION OF THE INVENTION

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a segment according to Embodiment 1, FIG. 1 is a perspective view of a steel shell without filling concrete, and FIG. 2 (A) is a female part of a joint portion of the segment. 2B is an overall perspective view of the mold joint and the male joint.
FIG. 3A is an enlarged perspective view of the female joint and the male joint, FIG. 3A is a cross-sectional view of the female joint and the male joint, and FIG. 3B is a front view of the male joint.

In the first embodiment, the steel shell 10a of the concrete filled steel segment 10 is provided with two inner main girders 11a in parallel with the two outer main girders 11 and the outer main girder 1 is provided.
1 between inner main girder 11a and inner main girder 11a and inner main girder 11
A is connected by a plurality of vertical ribs 12, and the parallel inner main girders 11a are connected by a connecting bolt 16.

At both ends of the steel shell 10a in the tunnel circumferential direction, joint plates 13 are provided between the inner main girders 11a and the inner main girders 11a, and segments are provided between the outer main girders 11 and the inner main girders 11a. A female joint 17 and a male joint 17a that form a coupling structure that mechanically couples in the tunnel circumferential direction are provided. As shown in the figure, the female joint 17 and the male joint 17a are provided with a joint plate 18 that also functions as a joint plate, and the joint plate 18 of the female joint 17 is provided with an engagement hole 19. , The joint plate 1 in the male joint 17a
8 is provided with an engagement protrusion 20 that engages with the engagement hole 19.

Outer main girder 11 and inner main girder 11a and joint plate 13
A skin plate 14 is connected to the outer side of the steel shell 10a.
The steel shell 10a is filled with filling concrete (not shown).

The present invention is characterized by the mechanical coupling structure of the female joint 17 and the male joint 17a in the segment, which will be described with reference to FIGS. 2 and 3.
As shown in each drawing, in the male joint 17a, the base end of the engaging projection 20 is fixed to the front surface of the joining plate 18. The engagement protrusion 20 is composed of a shaft portion 20a and a head portion 20b at the tip of the shaft portion, and the shaft portion has a taper 21a that reduces the diameter in one direction of the tunnel circumference and a taper 21b that reduces the diameter of the shaft portion toward the base end side in the tunnel axial direction. Are formed. The head portion 20b is the shaft portion 2
0a bulges inward and outward from the tunnel.

In the female joint 17, a rear frame 22 having a box-shaped cross section is liquid-tightly fixed to the rear surface (inside the segment) of the joint plate 18 in which the engagement hole 19 is formed.
A closed space 23 in which the head portion 20b of the male joint 17a is fitted is formed in the rear frame 22. Further, the engagement hole 19 communicates with the opening 19a into which the head 20b of the male joint 17a can be inserted, and the male joint 1 by communicating with the opening 19a.
7a has a locking portion 19b into which the shaft portion 20a can be fitted, and the locking portion 19b has a taper 21c whose one end side in one direction of the tunnel circumference is reduced and a front side of the joining plate 18 is reduced in diameter in the tunnel axial direction. A taper 21d is formed.

In the connecting structure of Embodiment 1, the steel segments 10 are connected by moving in two directions. First
By moving the joint portion of one steel segment 10 to the other segment side adjacent to the tunnel circumferential direction, the head portion 20b of the male joint 17a is moved to the engaging hole 19 of the female joint 17.
In the opening 19a. Secondly, the shaft portion 20a of the male joint 17a is fitted into the locking portion 19b of the female joint 17 by moving the steel segment 10 in the tunnel axial direction.

When the segments are connected in this way and the segments receive a tensile force or a bending moment in the circumferential direction of the tunnel, the head portion 20b of the male joint 17a is engaged with the engaging portion 19b of the female joint 17. Resists due to being fitted. Further, the taper 21a in the tunnel circumferential direction and the taper 21b in the tunnel axial direction of the shaft portion 20a of the male joint 17a and the corresponding tapers 21c and 21d of the locking portion 19b of the female joint 17 are fitted to each other. Due to the wedge action at each taper, the segments are tightly engaged both in the tunnel circumferential direction and the tunnel axial direction, and the segments are displaced in the tunnel axial direction or a gap is created in the tunnel circumferential direction. There is no.

Further, when the segments are connected in this way, the head portion 20b of the male joint 17a is in the closed space 23 closed by the rear frame 22 of the box-shaped cross section on the back surface of the joining plate 18 of the male joint 17a. Since it is located and is not filled with filling concrete, the head 20b of the male joint 17a of the male joint 17a does not have to be formed at the time of segment production by using a frame or the like unlike the conventional case. The mating is done securely.

4 and 5 show a segment according to the second embodiment, FIG. 4 (A) is an overall perspective view of a female joint and a male joint in a joint portion of the segment, and FIG. 4 (B) is FIG. 5 is a cross-sectional view of a female joint and a male joint, and FIG. 5 is an enlarged front perspective view of a joint plate provided with a female joint.

In the second embodiment, the female joint 17 is integrally provided on the back surface of one joint plate 13a of the segment. That is, in the second embodiment, the joint plate 13a on the side where the female joint 17 is provided is provided across both outer main girders 11. On the back surface of this joint plate 13a, the female joint 1
7 is provided. Specifically, on the back surface of the joint plate 13a, a reinforcing plate 28 corresponding to the joint plate 18 of the first embodiment,
A rear frame 27 corresponding to the rear frame 19 of the box-shaped cross section is provided. The reinforcing plate 28 is provided with an engaging hole 19 having the same structure as the engaging hole in the first embodiment, and the same elements as those in the first embodiment will be described with the same reference numerals.

In the second embodiment, the joint plate 13a is also provided with an engaging hole 29 having a cross-sectional shape similar to the engaging hole 19 of the reinforcing plate 28. As shown in FIGS. 4 and 5, the taper in the tunnel circumferential direction and the taper in the tunnel axial direction of the engaging portion in the engagement hole 29 are two taper 21 of the reinforcing plate 28.
Both tapers are formed with the same inclination so as to extend continuously to the outer ends of c and 21d. Male Joint 1 of Embodiment 2
The configuration of 7a is the same as that of the first embodiment.

Also in the second embodiment, the connecting operation is performed by moving the segments in two directions as in the first embodiment. First, by moving the joint portion of one steel segment 10 to the other segment side adjacent in the tunnel circumferential direction, the head portion 20b of the male joint 17a is moved to the engagement hole formed in the joint plate 13a. It is inserted through the opening of No. 29 and is further inserted into the opening 19 a of the engaging hole 19 of the female joint 17. Secondly, by moving the steel segment 10 in the tunnel axial direction, the shaft portion 20a of the male joint 17a is fitted to the engaging portion 19b of the female joint 17 and the engaging portion of the joint plate 13.

In the second embodiment, when the segments are connected, as in the first embodiment, when the segments receive a tensile force or a bending moment in the tunnel circumferential direction, the head portion 20b of the male joint 17a is connected to the joint. By engaging the locking portion of the plate 13a and the locking portion 19b of the female joint 17, resistance is exerted. Further, the taper 21a in the tunnel circumferential direction of the shaft portion 20a of the male joint 17a and the taper 21b in the tunnel axial direction, and the taper of the engaging portion of the joint plate 13a and the engaging portion 19b of the female joint 17 corresponding to the above. 21
When c and 21d are fitted to each other and a wedge action is exerted on each tapered portion, the segments are tightly engaged both in the tunnel circumferential direction and the tunnel axial direction, and the segments are displaced from each other or a gap is generated. There is no. Other functions are the same as those in the first embodiment.

FIG. 6 shows the third embodiment. In the third embodiment, the engaging projection 20 is provided so as to project from the front surface of the joint plate 13 so as to be adjacent to the outer main girder 11 at one widthwise end of one segment, and the other widthwise end of the segment ( That is, a groove-shaped engagement 19b with which the neck portion of the engagement projection 20 engages is provided at one end portion in the width direction of the joint plate 13 of the other opposing segment, and communicates with this engagement portion 19b. An opening 19a into which the engaging projection 20 can be inserted is provided at one end of the outer main girder 11. Also, the locking portion 1
A rear frame is provided on the back surface of 9b to form a closed space 23.

The connecting structure of the third embodiment is similar to the first and second embodiments.
Can be coupled in the same manner as described above, and the segments are relatively moved in the tunnel axis direction so that the engagement protrusion 20 of one segment is engaged with the locking groove 19b through the opening 19a of the other segment. be able to. As a result, the action when the segments receive a tensile force or a bending moment in the tunnel circumferential direction is the same as in the first and second embodiments.

FIG. 7 shows the fourth embodiment. In the fourth embodiment, the opposing segments 10 do not have inner main girders, and the female joint 17 is fixed to the outer main girders 11 via fillet welds 29. Is different from.
Other configurations are the same as those of the second embodiment.

In the fourth embodiment, it acts on the joint plate 13,
It is only the end portion to which the outer main girder 11 is fixed that resists the force in the direction of separating the segments, that is, the bending in the plate thickness direction, and for the separation force acting on the joint portion of the segment 10, This joint plate 13 alone cannot sufficiently resist. As a countermeasure against this, in the fourth embodiment, the upper and lower portions of one side surface 17c of the female joint 17 having a box-shaped outer shape located at both ends inside the joint plate 13 and the inner side surface of the outer main girder 11 are filled with the fillet welded portion 31. Weld through. In addition, the inner surface of the joint plate 13 and the upper and lower portions of the front surface 17d of the female joint 17 also have fillet welds 31a.
Welding auxiliary through. Other configurations are the same as those of the second embodiment.

In the fourth embodiment, when the separation force acts on the joint portion of the segment 10, it can be transmitted to the outer main girder 11 via the female joint 17, and the outer main girder 11 resists the inner main girder. Even if it is not provided, the joint plate 13 is not largely bent. Female joint 1 of Embodiment 4
Of course, the fixing structure of No. 7 may be applied to the first to third embodiments.

[0040]

According to the steel segment connection structure of the present invention, the conventional bolt fastening work and bolt box hole filling work can be reduced or unnecessary (in the case of complete bolt boxless), thus contributing to labor saving construction. obtain. Also,
The female joint can be easily fixed to the main girder of the steel segment by making the shape of the female joint.

[Brief description of drawings]

FIG. 1 is a perspective view of a steel shell without filling concrete according to a first embodiment of the present invention.

FIG. 2A is a perspective view of a female joint and a male joint in a joint portion of a segment, and FIG. 2B is an enlarged perspective view of the female joint and the male joint.

FIG. 3A is a sectional view of a female joint and a male joint, and FIG.
[Fig. 4] is a front view of a male joint.

4A is a perspective view of a female joint and a male joint in a joint portion of a segment, and FIG. 4B is a sectional view of the female joint and the male joint.

FIG. 5 is an enlarged front perspective view of a joint plate provided with a female joint.

FIG. 6 is a perspective view of a steel shell according to Embodiment 3 of the present invention without filling concrete.

FIG. 7A is a perspective view of a female joint and a male joint in a joint portion of a segment according to a fourth embodiment of the present invention,
(B) is an enlarged view of (a) part of FIG. (A), (C) is a perspective view of a single female joint, and (D) is a cross-sectional view of a female joint and a male joint.

FIG. 8 is a cutaway perspective view of a conventional concrete filled steel segment.

[Explanation of symbols]

1 main girder 2 vertical ribs 3 joint plates 4 skin plate 5 concrete 6 wire mesh 7 bolt holes 8 Erector mounting hole 10 steel segment 10a steel shell 11 foreign main girder 11a Main girder 12 vertical ribs 13 Joint plate 14 Skin plate 16 connecting bolt 17 Female fitting 17a male joint 18 Bonding plate 19 Engagement hole 19a opening 19b Locking part (locking groove) 20 Engaging protrusion 20a shaft 20b head 21a Tunnel circumferential taper 21b Tunnel axial taper 21c Tunnel circumferential taper 21d Tunnel axial taper 22 Rear frame 23 closed space 27 Rear frame 28 Reinforcement plate

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Noriyuki Hirosawa             2-6-3 Otemachi, Chiyoda-ku, Tokyo New Japan             Steelmaking Co., Ltd. (72) Inventor Masato Miyake             20-1 Shintomi, Futtsu City Nippon Steel Co., Ltd.             Inside the surgical development headquarters (72) Inventor Minoru Kuroda             2-6-3 Otemachi, Chiyoda-ku, Tokyo New Japan             Steelmaking Co., Ltd. (72) Inventor Yoshitaka Miyashita             2-1, Honohara, Toyokawa, Aichi Techno             Su Co., Ltd. (72) Inventor Akira Okamoto             2-1, Honohara, Toyokawa, Aichi Techno             Su Co., Ltd. F-term (reference) 2D055 BA01 CA01 GC02 GC04 GC06

Claims (5)

[Claims] 1. A steel segment comprising a main girder, a joint plate, and a skin plate filled with a filled concrete in which a male-type joint and a female-type joint are used to connect the segments. The mold joint is configured by fixing a connecting shaft having a head at the tip to a joint plate, and the female mold joint is formed by forming an engaging hole for engaging a male joint in a joint plate which also functions as a joint plate. The engaging hole has an opening into which the head of the male joint can be inserted, and a locking portion that communicates with the opening and into which the shaft of the male joint can be fitted. Connection of concrete filled steel segments, characterized in that the locking part of the hole has a taper that reduces the diameter in one direction of the tunnel circumference and a taper that reduces the diameter at the base end side of the shaft in the tunnel axial direction. Construction. 2. The female joint is formed in a box shape by fixing a water blocking rear frame to the rear side of the joint plate to form a closed space for positioning the head of the male joint. The connection structure of concrete filled steel segments according to claim 1. 3. A steel segment comprising a main girder, a joint plate, and a skin plate filled with a filled concrete and filling the concrete with a male joint and a female joint. The mold joint is configured by fixing a connecting shaft having a head at the tip to a joint plate, and the female mold joint has an engaging hole for engaging a male joint with the joint plate and the reinforcing plate fixed to the joint plate. The engagement hole is formed by being opened, and has an opening into which the head of the male joint can be inserted, and a locking portion that communicates with the opening and into which the shaft of the male joint can fit. The shaft portion and the engaging portion of the engagement hole have a taper that reduces the diameter in one direction of the tunnel circumference and a taper that reduces the diameter toward the base end side of the shaft portion in the tunnel axial direction. Steel segment connection structure. 4. The concrete according to claim 3, wherein a closed space in which the head of the male joint is located is formed by fixing a water blocking rear frame to the rear side of the reinforcing plate. Connection structure of packed steel segments. 5. The female joint according to claim 1, wherein the female joint is welded to the main girder so as to transmit the separation stress acting between the segments to the main girder. Connection structure of concrete filled steel segments.