JPS62215798A - Apparatus for bonding segment for covering construction method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Description: TECHNICAL FIELD The present invention relates to a device for joining a plurality of segments assembled into a ring for tunnel lining in the circumferential direction of said ring and in its axial direction.

(Prior Art) In tunnels excavated using the shield method, a plurality of segments made of concrete, steel, or a composite thereof are used as lining materials. The plurality of segments are formed into a ring by rolling them up along the excavation surface, and a continuous ring row is formed as the tunnel excavation progresses. Segments adjacent in the circumferential direction of each ring and segments adjacent in the axial direction of the ring are respectively coupled to each other.

Conventionally, a perforated joint plate is provided on each end face in the circumferential direction and the axial direction of each segment or parallel to the end face at a distance from each end face, and each joint plate for adjacent segments is provided with a perforated joint plate. The end face of the segment parallel to the joint plate is fastened by a bolt extending into the segment through the hole in the joint plate and a fastener such as a nut screwed into the bolt.

By the way, with respect to the steel segment, the problem described below does not occur by providing the joint plate, but with the segment made of concrete or the composite, it is not possible to insert the bolt into the hole. , the head of the bolt or the shaft end of the bolt and a nut screwed thereto can be received therein, and the hole communicates with the hole in order to obtain a space that allows the nut to be tightened. In addition, it is necessary to provide four parts that open on the inner surface of the segment. However, since these four parts constitute the unfilled parts of the segment, these parts have lower strength than the parts of the pond where the four parts are not provided, and there is a problem that they become a weak point in the strength of the segment. there were.

Furthermore, Japanese Patent Publication No. 52-3217 discloses, as an example of a device for connecting adjacent ring segments, a pin embedded in concrete so as to protrude from the end face of one segment in the axial direction, and A socket is disclosed which is embedded in the concrete so as to open in the end face of the other segment opposite to the end face of the other segment, and is capable of receiving the pin and firmly gripping it.

However, even in this example, it is necessary to form spaces in the segment for arranging the pins and the sockets, and these spaces, like the recesses, constitute unfilled parts of the concrete.

OBJECTS OF THE INVENTION Accordingly, it is an object of the present invention to provide a device for joining segments I that does not suffer from the formation of unfilled areas of concrete which would reduce the strength of the segments.

(Structure of the Invention) The present invention connects a plurality of segments assembled into a ring for lining a tunnel to each other in the circumferential direction of the ring, and also connects the segments of the plurality of rings to each other in the axial direction of the ring. A joint member fastened by a fastener is arranged on the inner surface of each segment in order to connect the segments.

(Operations and Effects of the Invention) According to the present invention, since the joint member is arranged on the inner surface of each segment, +-AJ'
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The joint members can be fastened to each other using fasteners such as r Iks. In the case of a segment made of concrete or a composite material, this makes it possible to insert the bolt, and also allows the head or shaft of the bolt to be received by the nut screwed thereto. Tightening of the nuts eliminates the need for the conventional formation of unfilled concrete sections, which are essential to enable operation.

Therefore, the segments are made of concrete having a uniform thickness throughout, thereby realizing a lining with segments having uniform strength.

Furthermore, the coupling device of the present invention can be made removable for each segment, and when the earth water pressure acting on the ground segment of the tunnel is relatively low, a filler material can be installed between the ground ground and the ring row. After injection, the coupling device can be removed and converted into a segment that is subsequently subjected to lining.

Furthermore, when the coupling device of the invention is applied to a steel segment, including segments made of concrete and of said composite, and is not removed, or furthermore, when it is buried in concrete, for example as a secondary lining. When used, it acts as a reinforcing material for the segment.

Furthermore, when the coupling device of the present invention is applied to any segment, when the coupling device is repurposed, only a small number of coupling devices are needed as support for the segment, which contributes to reducing the cost required for tunnel lining. do.

(Embodiment) The features of the present invention will become clearer from the following description of an embodiment shown in one figure.

Referring to FIG. 1, a joint member 12, which together with a fastener described below constitutes a coupling device 10 according to the present invention, is applied to a concrete segment 14.

As shown in FIG. 2, a plurality of segments (in the illustrated example, four segments having the same shape) 14 are excavated using an excavator (not shown), such as a shield excavator. The lining ring 15 is formed by being rolled up along the excavated surface A. As is clear from FIG. 3, as the excavation progresses, new rings 15 are sequentially formed adjacent to the existing rings 15 in the direction of tunnel extension.

Each segment 14 is the axis of the ring 15! ! an outer surface 14a consisting of a partially cylindrical surface with a large diameter, an inner surface 14b consisting of a partially cylindrical surface with a small diameter, and a pair of circumferential end surfaces 14c connected to these surfaces; It has inner and outer surfaces 14a, 14b and a pair of axial end surfaces 14d continuous to the circumferential end surface 14c (see FIG. 1).

Each ring 15 is a circumferential end surface 14c of each segment 1'4.
The ring rows are assembled with the axial end faces 14d of the segments 14 abutting each other.

The segments 14 constituting the rings 1 and 5 and adjacent to each other in the circumferential direction of the ring (in the circumferential direction of the tunnel) are connected to each other by connecting the joint members 12 attached to the respective segments 14 with fasteners 16 consisting of bolts and NAND assemblies. mutually concluded. In addition, each adjacent ring 15 is
5 and which are opposite to each other in the axial direction of the ring (the axial direction of the tunnel) by mutually fastening the joint members 12 of the segments 14 with a fastener 18 consisting of a bolt and a pair of nut assemblies. has been done.

Each segment 14 has an injection hole 14e for filling a backfilling material B (see FIG. 5) such as mortar between the ring 15 and the tunnel excavation surface A after assembly of the ring 15.
(See FIG. 4) are provided in plurality (two in the illustrated example). radially extending through segment 14 and extending through outer surface 14 thereof.
A plurality of injection holes 1 each opening on the inner surface 14a and the inner surface 14b.
4e is provided approximately at the center of the segment 14 in the axial direction, that is, in the width direction, at intervals in the circumferential direction.

The coupling member 12 is secured to the segment 14 at its inner surface 14b. The illustrated joint member 12 is a box-shaped member made of steel that is open on the axis C side, and has an inner surface 14 of the segment.
It has a bottom plate part 12a extending in the circumferential direction along b, and two pairs of side plate parts 12b and 12c provided along the periphery of the bottom plate part.

The bottom plate m 12 a is made of a rectangular steel plate curved to approximately the same curvature as the inner surface 14b of the segment. A pair of side plate parts 12
b are each made of a rectangular steel plate, and are welded on each short side of the bottom plate portion 12a at right angles to the bottom plate portion so as to be parallel to the pair of circumferential end portions 14c of the segment. Further, the pair of side plate parts 12c are each made of a steel plate having the same height dimension as the side plate part 12b, and both of its inner and outer edges are curved with a concentric curvature with the bottom plate part 12a, and the pair of axial end faces of the segment. 14d, and are welded on each long side of the bottom plate part 12a at right angles to the bottom plate part. Each side plate portion 12c has its circumferential end in contact with each side plate portion 12b, and these contact points are also welded. Instead of constructing each part of the box member from a steel plate and welding these together, for example, only the bottom plate part 12a and one side plate part 12b can be formed by bending a single steel plate at required points. .

In order to reinforce the joint member 12, ribs 2 made of a plurality of steel plates are provided at intervals in the circumferential direction between the pair of side plate parts 12c.
0 is arranged and welded to the bottom plate part 12a and the side plate part 12c. The inner edge of each rib 20 on the side opposite to the bottom plate portion 12a lies within a curved plane that includes the inner edge of each side plate portion 12b, 12c.

It is desirable that the box-shaped member has a circumferential length and an axial length such that it does not protrude from the inner surface 14b of the segment 14. That is, the length in the circumferential direction of the bottom plate part 12a and therefore the pair of side plate parts 12c is smaller than the length in the circumferential direction of the inner surface 14b of the segment, and the length in the axial direction of the other pair of side plate parts 12b is It is desirable that the width dimension, which is the length dimension, is smaller than the width dimension of the inner surface 14b of the segment. By setting in this way, when the segments 14 are butted against each other, it is possible to avoid collisions between the joint members, that is, mutual interference, due to the generation of gaps between the joint members 12, and also to avoid mutual interference between the joint members 16. 18 allows a tighter joining of the segments 14 by tightening with 18.

The IBF member 12 can be attached to the segment 14 using the injection hole 14e for the backfilling material provided in the segment 14.

In order to utilize this injection hole 14e, the injection hole 14e is prepared in advance.
An outer tube member 22 whose length dimension is smaller than that of each injection hole 1
4e, and is embedded in the segment 14, and the outer tube member 22 defines a part of the injection hole 14e.

The outer tube member 22 is provided with an inner thread 22a on its inner surface, and an inner tube member 24 having an outer surface provided with an outer thread 24a that can engage with the internal thread is connected to the outer tube member 22 at one end thereof. is screwed into the The other end of the inner tube member 24 is
Welding was performed to reinforce the peripheral edge of the hole 26 and the chain hole 26 provided in the bottom plate portion 12a of the joint member 12 that is in contact with the inner surface 14b of the segment. The rectangular reinforcing plate 28 has a hole aligned with the hole 26 and having a smaller diameter than the chain hole, and projects from the inner surface 14b to the outside of the segment 14 through the hole. A washer 30 is fitted to the other end of the inner tube member 24, and a nut 32 is further screwed therein.
The coupling member 12 is fixed to the segment 14 by tightening the nut. The backfilling material is the inner tube member 24
can be supplied from the other end. An internal thread 24b is formed on the inner surface of the other end of the inner tube member 24, and a cap 34 having an outer thread that can engage with the internal thread is screwed onto the inner tube member 24. cap 34
This prevents leakage of the surface filling material after injection.

For example, instead of the inner tube member 24 which is a male threaded member and the nut 32 which is a female threaded member for fixing the joint member 12 to the segment 14,
A plurality of bolts (not shown) partially embedded so as to protrude outward from a and a nut that can be screwed onto each bolt are not utilized.

Each side plate portion 12b, 12c of the joint member 12 has a fastening i16.
. is pierced.

One side plate portion 12 of each joint member 12 adjacent in the circumferential direction
The insertion hole 36 of b has a relatively short head) 16a
is inserted, and tensile force is applied to both joint members 12 by tightening the nut 18b.

Further, in the axial direction, as is clear from FIG. 3, the fastener 18 has a relatively long headless pole 18a
and two nuts 18b screwed onto both ends thereof. The axially adjacent force ring 1
5 (referred to as 14A in FIG. 3 and here only for the sake of explanation), two segments of the other ring 15 (referred to as 14A in FIG. 3 and here only for the sake of explanation) - 7) are in contact. One insertion hole 36 and two insertion holes 36 in one side plate portion 12c of the joint member of segment 14A, and one insertion hole 36 in side plate portion 12c of segment 14B and two insertion holes 36 in side plate portion 12c of segment 14C corresponding thereto. Two insertion holes 3
6 and 18a are passed through each nut 1.
By tightening 8b, a tensile force is applied to one joint member and two joint members facing each other. In this way, a lining having relatively high rigidity in both the circumferential direction and the axial direction is obtained.

It goes without saying that the bolts of the fasteners 16,18 can be chosen to have any shape.

Furthermore, instead of the bolt and nut assembly, the fastener may be a pin and a pin (not shown) that is secured to both ends of the pin.

The segment 14 has a shape 7 with the joint member 12 attached thereto.
m, commonly used segment assembly equipment+! 1
(not shown) can be used to assemble the ring 15. When assembling the segment 14, the inner thread 2 of the inner tube member 24 is
4b can be used. Alternatively, both side plate portions 12c of the joint member may be gripped by the assembly device. Furthermore, the insertion holes 36 provided in the side plate portions 12c can also be used as insertion holes for pins (not shown) for suspending the segments 14 by the assembly device.

After assembling a plurality of rows of rings 15 by fastening the segments 14 with each other using the fastener, the filling material B is injected. This state is shown in FIG.

After the backfilling material B has solidified, a second sheathing made of, for example, concrete is applied as needed, and the joint member 12 and fasteners 16 and 18 are buried within the second sheathing. This state is shown in FIG.

When the water pressure acting on the ring 15 of the ground that defines the excavation surface A is relatively low, instead of burying the joint member and fasteners, the joint member 12 and the fasteners 16, 18 are buried.
, inner tube member 24. Washers 30, nuts 32 and plugs 34 can be removed and installed on newly assembled segments 14 as tunnel excavation progresses.

In addition to the concrete segment 14, the present invention can be applied to a steel segment 38, as shown in FIG.

This segment 38 has an outer surface 38a and a circumferential end surface 38.
b and the axial end face 38c are respectively defined by a skin plate and an end plate made of a steel plate. The inner surface of this segment 38 is defined by the end plate and a rib 4o that is spaced apart in the circumferential direction between both end plates that define the end surface 38c and that is welded to these end plates and the skin plate. has been done.

The joint member 12 of the present invention is arranged in contact with these ribs 4o. Two injection holes (not shown) for the filling material are formed in the skin plate at the same positions as in the concrete segment 14, and an outer tube similar to that described above is formed in alignment with the injection holes. Parts (not shown)
is welded. An inner tube member (not shown) similar to that described above is screwed into the outer tube member at one end thereof.

The other end of the inner tube member is connected to the bottom plate portion 12 of the joint member 12.
The joint member 12 is fixed to the segment 38 at its inner surface by tightening a nut 32 that extends through and is screwed into the nut 32 . Note that if there is no need to repurpose the joint member 12, it can be fixed to the rib 40 by welding.

The bonding system of the present invention may also be applied to composite segments (not shown), generally consisting of concrete filled segments 38. The joint member 12 can be attached to this composite segment in the same manner as the joint member 12 is attached to the concrete segment 14.

[Brief explanation of drawings]

DI Figure 1 is a perspective view of a concrete segment and a joint member attached to it, and Figure 2 is a cross-sectional view at the center position in the axial direction of the ring and at a position between the joint member and the axial end face of the segment. 3 is a linear representation of the inner surface of the assembled multiple rows of rings, FIG. 4 is an enlarged sectional view of the attachment part of the joint member, and FIGS. 5 and 6 are views showing the backfilling material. A half-sectional view similar to FIG. 2 showing the injected state and the state with the secondary lining applied, respectively. FIG. 7 is a perspective view of the steel segment and the joint member attached to it. It is. 10: Coupling device, 12: Joint member, 12a and 1
2b, 12c: Bottom plate and side plate of box-shaped member, 14.38: Concrete segment and steel segment, 14a to 14d: External surface, inner surface, circumferential end surface and axial end surface of concrete segment, 14e:'A Filling material injection hole, 16.18: Fastener. 24: Inner pipe member (male thread member), 32: Nut (female thread member), 36: Insertion hole for fastener. Agent Patent Attorney Yoshi Matsunaga Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Δ Figure 6 Figure 7 Figure 8b

Claims (4)

[Claims] (1) A device for interconnecting a plurality of segments assembled into a plurality of rings for tunnel lining, comprising a joint member fixed to each segment on its inner surface, and a joint member fixed to the inner surface of each segment, and A coupling device for lining segments, comprising a fastener for coupling coupling members to each other in the circumferential direction of the ring and in the axial direction thereof. (2) The joint member is composed of a box-shaped member that is open toward the axis, and the box-shaped member includes a bottom plate portion extending in the circumferential direction along the inner surface of the segment, and a bottom plate portion provided along the periphery of the bottom plate portion. A pair of side plate portions facing each other in the circumferential direction and a pair of side plate portions facing each other in the axial direction, each side plate portion having at least one insertion hole for the fastener. The coupling device according to paragraph (1). (3) The joint member includes a male screw member fixed to the segment and protruding from the inner surface of the segment to the outside through a hole provided in the bottom plate, and a female screw member screwed into the male screw member. is fixed to
A coupling device according to claim (2). (4) The combination according to claim (3), wherein the male threaded member is formed of an inner tube member that is threadedly joined to an outer tube member that is provided in the segment and defines a backfilling material injection hole. Device.