JP2727307B2 - Joints for repairing joints of underground structures and methods of construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit block for an underground structure such as a water supply and sewage system, a subway, a common ditch, a tunnel, an underpass, an underground shopping mall, or various tunnels, which has flexibility to allow relative displacement. The present invention relates to a joint for repairing a joint part for repairing a joint part to be connected in a watertight manner and a method for constructing the joint.

[0002]

2. Description of the Related Art Underground structures such as subways, common ditches, tunnels, underpasses, underground malls, and various tunnels are constructed by connecting unit blocks by joints that allow relative displacement. As such a joint, a frame body forming an inner peripheral surface is anchored to the opposite connection end surface of the unit block to be connected, and rubber, synthetic resin, or the like is attached to the inner peripheral surface of the frame body at both connection end surfaces. The edges of the flexible water blocking members formed by the elastic body are fixed, and the flexible water blocking members are arranged along the outer periphery of the unit blocks, whereby the unit blocks are connected via the flexible water blocking members. Some flexible members are configured to allow relative displacement of unit blocks due to earthquake or uneven settlement of the ground due to elastic deformation of the flexible member while stopping water.

[0003] For example, Japanese Patent Publication No. Sho 63
As disclosed in Japanese Patent Application Laid-Open No. 58982, rubber, synthetic resin, or the like is provided over a step b, b 'formed on the inner peripheral surface of the end of a pair of opposed culverts a, a' as shown in the figure. Has an annular constriction c bulging inward at the center by the elastic body, and anchoring flanges d, on both sides of the constriction c.
A short cylindrical flexible water-stopping member e formed by extending d 'is fixed by anchoring flange portions d and d', and is formed between the stepped portions b and b 'and the flexible water-stopping member e. Protective members f and f 'for preventing the flexible water blocking member e from bulging and deforming in the axial direction are disposed in the space. g and g 'are frames having flanges h, h', j and j 'and end faces i and i', and k is a joint material. In the drawings, the upper side in the figure is the outer surface, and the lower side is the inner surface.

[0004]

By the way, when a large fluctuation occurs in the ground due to an earthquake or the like, the displacement of the unit block concentrates on the joint portion, so that the joint portion is particularly damaged in a long unit block. .

[0005] When the joint is stretched and wide open, or when the joint is greatly damaged by compression, there is no other way than to recover from a large open cut from the outside, and there is a problem that the work becomes large and time is required. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can repair a joint from the inside of the structure, thereby facilitating repair work and shortening a restoration period. An object of the present invention is to provide a repair joint and a method for constructing the joint.

[0007]

A joint for repairing a joint of an underground structure which achieves the above object is provided along the periphery of the facing end face of the underground structure to connect the underground structure with the joint. A joint to be connected, a pair of frame members fixed to opposite end surfaces of the connection structure via an anchor member, and both frame portions formed of an elastic material and both widthwise edges fixed to the frame member. A flexible water blocking member for joining the members, wherein the frame member is divided into a plurality of unit frame members in a circumferential direction of the connection structure, and at least one of the divided surfaces is the structure. Is formed as an inclined surface parallel to the axial direction and at a predetermined angle with respect to the extending direction of the joint.

[0008] The construction method is such that a pair of unit frame members, each of which is fixed to and integrated with a pair of unit frame members respectively fixed to opposing connection end faces, is divided into inclined surfaces extending inward. With the pair of unit frame members having the last as a last unit, the unit frame members adjacent in the circumferential direction are connected by a connecting member and assembled sequentially, and the anchor member is embedded and fixed at the connection end face of the structure to form an integral frame member. In addition, the fixing means is removed and a flexible water blocking member is mounted between the frame members.

In the joint for repairing the joint of an underground structure,
By sequentially fixing the unit frame members divided at the end with the unit frame member having a dividing surface inclined in the direction of expanding to the inner peripheral side from the inside to the joint end of the underground structure, the joint of the underground structure joint A frame member can be formed over the entire circumference, and a flexible water blocking member can be attached to the frame member to repair and configure the joint from the inside of the underground structure.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a lower part of a joint portion of an underground structure joint according to an embodiment of a joint for repairing a joint portion of an underground structure according to the present invention, showing a divided state of a frame body corresponding to the AA section in FIG. 2. It is a conceptual diagram.

In the illustrated joint repair joint 1, the frame 2 is fixed to the inner peripheral corners of the joint end surfaces of the connecting structures 10, 10 ', respectively, so that a step is formed from the inner peripheral surfaces of the structures 10, 10'. Forming the mounting step surfaces 2A and 2A '
A, 2A 'is provided with a flexible water-stopping member 3 formed of an elastic body such as rubber or synthetic resin in a watertight manner, and connection structures 10, 10' on the outer surface side with respect to the mounting step surfaces 2A, 2A '.
Between the end faces (between the outer flanges 2C of the opposing frame bodies 2 and 2 ', which will be described later). As a result, the connection structures 10 and 10 'are watertightly connected via the flexible water-stopping member 3, and their relative deformation is allowed by their elastic deformation.
In FIG. 1, the upper side in the figure is the inner surface, and the lower side is the outer surface.

Hereinafter, the structure of each part will be described in detail. The structure 10 and the structure 10 'are symmetrical.
Except for the case where it is particularly necessary to explain the structure 10 side, the other is omitted. The structure 10 'is indicated by the same reference numeral with a dash (').

The frame 2 has an inner flange portion 2B extending from the inner edge of the mounting step surface 2A parallel to the axial direction of the structure 10 and parallel to the inner circumferential surface of the structure 10 to the inner circumferential side, and the outer edge thereof. An outer flange portion 2 </ b> C is formed to extend outward from the portion, and the shape of the connection end surface portion of the structure 10 is defined by the frame 2. In addition, anchor bolt 2 is attached to mounting step surface 2A.
D is fixed, and the anchor bolt 2D is embedded in the structure 10, whereby the frame 2 and the structure 10 are firmly connected and fixed.

The anchor bolt 2D is fixed to penetrate the mounting step surface 2A of the frame 2 at a right angle, is fixedly protruded from the inner surface side of the mounting step surface 2A, and has a front end on the outer surface side which is a connection end surface of the structure. Are bent at right angles to the opposite side (the opposite side to the outer flange portion 2C).

The flexible water-stopping member 3 is anchored from both outer peripheral edges of a U-shaped (upside down in the figure) constricted portion 3A bulged inward at the center by an elastic body having a predetermined thickness. The portion 3B is formed in an extended cross-sectional shape, and is continuous over the entire circumference in the circumferential direction of the structure 10. And the anchoring part 3
B is disposed on the mounting step surface 2A of the frame 2 and is fastened via a holding plate 52 by a nut 51 screwed to an anchor bolt 2D penetrating the anchoring portion 3B.

A protective rubber 53 is covered on the inner end of the anchor bolt 2D, and the inner peripheral surface thereof is flush with the inner surface of the structure 10. In addition, this
The protective rubber 53 is used to reduce the flow resistance in the case of a flow path,
It is used for improving the appearance and is not always necessary.

Here, as shown in the conceptual diagram of FIG.
(Corner frame 21, straight frame 22, inner-inclined end-face frame 23, and outer-inclined end-face frame 24 that matches this), and the end face of structure 10 is obtained by combining these unit frames 20. The flexible water blocking member 3 which is continuous in the circumferential direction is mounted on the mounting step surface 2A of the frame 2 in which the plurality of unit frames 20 are combined and integrated with each other. In this embodiment, the cross-sectional shape of the structure 10 is rectangular, and the upper side and the lower side use a pair of the linear frame 22, the inner-length inclined end-face frame 23, and the outer-length end-face frame 24, respectively. Is designed to use one pair of the inner-length inclined end face frame 23 and the outer-length inclined end face frame 24. The combination of these unit frames 20 is not limited to this, and should be changed as appropriate according to the cross-sectional shape of the connection structure.

As shown in the perspective view of FIG. 3, the corner frame 21 has a shape corresponding to the haunch shape of the inner periphery of the corner of the structure 10, and constitutes only the corner. Both end faces 2
1A is a surface orthogonal to the frame extending direction.

As shown in a perspective view in FIG. 4, the linear frame 22 is a straight line having a predetermined length (about 1 m) with good workability, and both end surfaces 22A are surfaces perpendicular to the extending direction. Is formed.

As shown in FIG. 5, the inner-inclined end-face frame 23 and the outer-length-inclined end-face frame 24 have one end face 23A which is orthogonal to the extending direction. The other end surface 23B is formed as an inclined surface which is inclined at a predetermined angle in the inner and outer peripheral directions while keeping the surface perpendicular to the extending direction parallel to the extending direction of the structure, and has an outer length One end face 24B of the inclined end face frame 24 (FIG. 2)
Are formed at the same angle and in the opposite slope, and when the inclined end faces are made to coincide with each other and the two 23 and 24 are combined, a straight line is formed. The inclination direction of the inclined end surface 23B of the inner-length inclined end face frame 23 is set such that the length of the inner surface side is longer than the outer surface side, and the inclination direction of the inclined end face 24B of the outer-length inclined end surface frame 24 is opposite to this. The outer side is set to be longer than the inner side.

FIGS. 3, 4 and 5 show a state at the time of construction, which will be described later.
10 shows a state where the unit frame bodies 20 and 20 ′ (provided at 10 ′) are fixed by the fixing bracket 26 to form the unit frame body pair 25.

The repair joint 1 having the above structure can be mounted on the damaged joint portion from the inside of the structure 10 and repaired by the repair joint mounting method according to the present invention as described below. it can.

First, FIG. 6 is a perspective view of the joint portion 10A of the structures 10, 10 'which are largely opened or pressed by a large relative displacement due to a large ground deformation.
As shown in the sectional view of FIG.
At the same time, a predetermined gap or more is formed between the connection structures 10 and 10 'while exposing the frame 11', and a frame plate 54 is arranged along the outer surface so as to cover the gap.

Next, the unit frame 20 fixed to the structures 10 on both sides is located at a portion to be a new joint portion, and the tip of the anchor bolt 2D and the reinforcing bar 11 are joined by wire and welding.

Here, when the unit frame body 20 is fixed to the structure, as shown in the sectional view of FIG. 8, the unit frame body 20 which is opposed to the unit frame body (disposed at the opposing portion of the connection structures 10 and 10 '). The unit frame members 20 and 20 ′ are connected to each other at a predetermined interval via a fixing bracket 26 having an elliptical angle in cross section as a fixing means to form a unit frame pair 25. The structures 10, 1 corresponding to 20, 20 '
Fixed to 0 '. The fixing bracket 26 is fastened and fixed to the projecting ends of the anchor bolts 2D, 2D 'to which the flexible water-stopping member 3 is attached later by nuts 51, 51', and the pair of unit frames 20, 20 'is flexibly fixed. The water member 3 is integrated while maintaining the interval of the initially set state. Also, the outer flanges 2C, 2C 'of the unit frames 20, 20' facing each other.
The joint material 4 is interposed in advance, and the outer edge of the joint material 4 is brought into contact with the frame plate 54 forming the outer surface of the repaired portion.

In the unit frame 20, the corner frame 21, the linear frame 22, and the outer-length inclined end frame 24 are fixed first, and finally, the inner-length inclined end frame 23 is fixed. In other words, by fixing the unit frame body 20 divided into a plurality in order and fixing the inner-length inclined end frame body 23 having the connection surface 23B inclined in the direction to finally spread to the inner surface side, the inner frame side can be easily fixed from the inner surface side. All the unit frames 20 can be fixed to form a continuous frame 2. The connection between adjacent ones of the unit frames 20 is performed by connecting the outer surfaces of the outer flanges 2C with connection fittings 27 (shown in FIGS. 3, 4 and 5) as connection members. In addition, a water leakage prevention treatment is performed on the butted end surface portion with a caulking material such as an epoxy resin.

After that, a mortar 12 is filled and poured between the crushed end face of the structure 10 and the frame 2 to
The fixing fitting 26 for fixing 0, 20 'is removed, and the flexible water-stopping member 3 is mounted between the two frames 2, 2'. As a result, the frame bodies 2 and
A frame 2 'is mounted and a predetermined interval is set between the frames 2' and 2 ', and the joints are repaired by connecting the frames 2 and 2' with a flexible water blocking member 3. In this way, this construction method can repair joints from the inner surface side, and can be applied even if there is vertical or horizontal misalignment of the structure requiring repair of joints, and is applicable to a wide range of repairs. You can do it.

It should be noted that at least one set of the unit frames having the inclined end faces (the inner-length inclined end frame 23 and the outer-length inclined end frame 24) is formed when the cross section of the structure is a circular structure. That is, the inclined division surface may be one place), and when the cross-sectional shape of the structure is a polygon as in this embodiment, one set may be set for one side, but may be more than one. It can also be an inclined surface.

[0029]

As described above, according to the joint for repairing a joint of an underground structure according to the present invention and the method for constructing the joint, the frame member is divided into a plurality of unit frame members in the circumferential direction of the connection structure. In addition, since at least one of the divided surfaces is formed as an inclined surface parallel to the axial direction of the structure and at a predetermined angle with respect to the extending direction of the joint, the inclined divided surface in the direction expanding toward the inner peripheral side is formed. By sequentially fixing the unit frame members having the unit frame members to the joint end of the underground structure, which is the joint to be repaired, from the inside thereof, the unit frame members can be formed over the entire periphery of the joint. The joint can be repaired by attaching a flexible water-stopping member thereto. In other words, the joint can be repaired from the inside of the underground structure without the need for cutting the outer surface, so that the repair work can be performed easily and the restoration period can be shortened.

[Brief description of the drawings]

FIG. 1 is a sectional view of a joint for repairing a joint of an underground structure according to the present invention.

FIG. 2 is a conceptual diagram showing a state in which a frame corresponding to the AA cross-sectional view of FIG. 1 is divided into unit frames.

FIG. 3 is a perspective view of a corner frame.

FIG. 4 is a perspective view of a linear frame.

FIG. 5 is a perspective view of an inner-length inclined end frame.

FIG. 6 is a perspective view of a structure connecting portion at the time of repairing a joint portion.

FIG. 7 is a cross-sectional view of the joint when repairing the joint.

FIG. 8 is a sectional view of a unit frame body pair.

FIG. 9 is a sectional view of a conventional joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Joint part 2 Frame 2D anchor member 3 Flexible water blocking member 10, 10 'Underground structure 20 Unit frame member 21 Corner frame (unit frame member) 21A End face (division surface) 22 Linear frame (unit frame member) 22A End face (divided face) 23 Inner-length inclined end frame 23A End face (divided face) 23B Inclined end face (divided face, inclined face) 24 Outer-length inclined end frame 24A End face (divided face) 24B Inclined end face (divided face) , Inclined surface) 25 Unit frame member pair 26 Fixing fitting (fixing means) 27 Connecting fitting (joining member)

Claims (2)

(57) [Claims] 1. A joint which is disposed along the periphery of an opposed end surface of an underground structure and connects the opposed underground structure, and is fixed to an opposed end surface of the connection structure via an anchor member. A pair of frame members, and a flexible water-stopping member formed of an elastic material and fixed to the frame members at both ends in the width direction to couple the two frame members together. The object is divided into a plurality of unit frame members in the circumferential direction, and at least one of the divided surfaces is an inclined surface parallel to the axial direction of the structure and having a predetermined angle with respect to the extending direction of the joint. A joint for repairing a joint of an underground structure, wherein the joint is formed as: 2. A unit frame member having a pair of unit frame members fixed to a pair of unit frame members fixed to opposing connection end surfaces and fixedly integrated by a fixing means, and having a dividing surface extending in an inward direction and extending inward. The unit frame members that are adjacent to each other in the circumferential direction with the pair at the end are connected by a connecting member and assembled sequentially, and the anchor member is fixed to the connection end surface of the structure, and the integral frame member is formed, and the fixing means is removed. The method according to claim 1, wherein a flexible water blocking member is mounted between the frame members.