JP3410437B2 - Segment ring and segment ring lining method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment ring used for forming a lining of a tunnel and a lining method for the segment ring.

[0002]

2. Description of the Related Art In recent years, a shield tunnel excavation method (hereinafter referred to as a shield method) is generally used as a tunnel construction method because it rarely loosens the ground to be excavated and has little influence on the surrounding area. The shield method uses a steel cylindrical shield machine equipped with a jack inside, and in the space created by excavation and propulsion, the tail part of the shield machine is made of steel or reinforced concrete to support the excavated part. Assemble the arc-shaped segments that are blocks into a cylindrical shape. Then, a lining ring (segment ring) is formed by connecting the joint surface of each segment with a joint metal, and by advancing this ring in the axial direction, the inner wall side of the tunnel is lined up while advancing. It is a construction method.

As the segment ring for forming the tunnel lining in the shield construction method, for example, Japanese Unexamined Patent Publication No. H8-83868
-326488 (see FIG. 4),
A structure in which a convex portion 100a and a concave portion 100b are provided over almost the entire left and right end surfaces of three segments 100 formed in an arc plate shape, and the convex portion of one segment is fitted into the concave portion of another adjacent segment, so-called It is known that three segments are assembled into a cylindrical shape by a hinge structure. Since the segment ring using such three-segmented segment has an internally static structure, the joint of each segment may be as simple as the above-mentioned hinge structure, and to connect the joint surfaces of each segment. No need for fitting hardware. Therefore, it is preferable in terms of workability and cost to use a segment ring composed of three equal segments as a segment ring for tunnel lining.

However, when a tunnel having a large outer diameter is used, if the segments are divided into three parts, the size of each segment becomes large and the transportability deteriorates. Therefore, conventionally, a tunnel having a large outer diameter is constructed. In doing so, the tunnel lining was formed by using segments obtained by dividing the segment ring into about 6 to 10.

[0005]

By the way, as described above, when the segment ring is divided into a large number, the cost of the metal fitting for joining the segments is increased, and the number of parts is increased, so that the workability is improved. May get worse. Further, for example, when constructing a cylindrical underground structure such as a circular underground wall, improvement in workability and cost is also required.

An object of the present invention is to provide a segment ring and a method for lining the segment ring, which can easily cover a tunnel having a large outer diameter and reduce the cost.

[0007]

In order to solve the above problems, the invention according to claim 1 is used for lining a tunnel, and is a segment ring composed of arc plate-shaped segments (21, 22). (10), wherein the segment comprises a hinge joint (21b) on the left end face (21a), the right end face (21c) is a substantially flat surface, and the right end face (22a). ) Is provided with a hinge joint (22b), the left end face (22c) is a substantially flat right segment (22), and the left and right end faces are substantially flat segments (93). The flat segment is interposed between the hinge segment and the right hinge segment, and these segments are integrally joined by a metal fitting to form a connecting segment (2
0) is formed, and the hinge joints of the three connecting segments are joined to each other as a hinge structure to form a ring shape.

According to the segment ring of the first aspect, the hinge joint of one segment is used when joining the segments together during the construction of the segment ring,
Since it is possible to join the hinge joints of other segments, or the planes of two adjacent segments can be joined using a known joint metal fitting, the workability of the segment ring is improved. Further, at a portion joined by a hinge joint, a joint metal for joining the segments to each other is unnecessary, and the cost for manufacturing the segment ring can be reduced. Moreover, since the segment ring is constructed by the hinge structure, the structure is stable in strength. Further, the connecting segments can be easily joined to each other, and the workability of the segment ring is improved. Each connecting segment is composed of a plurality of segments such as a left hinge segment, a right hinge segment, and a flat segment. Then, if these segments are transported to the place where the segment ring is arranged and are joined at the place,
It is possible to construct a connecting segment having a large size.
Therefore, it is possible to use the segment ring as a lining member for a tunnel having a large outer diameter by constructing a segment ring by joining three connecting segments in a tubular shape.

A second aspect of the present invention is the method for lining a segment ring according to the first aspect, wherein the left hinge segment and the right hinge segment are sequentially provided on the inner circumference of the tunnel in the radial or axial direction of the tunnel. Arranging, joining the hinge joint of the left hinge segment and the hinge joint of the right hinge segment as a hinge structure, and between the end face on the plane side of the left hinge segment and the end face on the plane side of the right hinge segment. Intervening flat segment,
By joining each flat surface with a joint hardware, 3
It is characterized in that one connecting segment is formed in a ring shape.

According to the segment ring lining method of the second aspect, the same effect as that of the first aspect can be obtained.

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A segment ring 10 according to this embodiment will be described below with reference to the drawings. The segment ring 10 shown in FIG. 1 is made of steel, reinforced concrete, or the like, and is a member used when lining a tunnel. The segment ring 10 includes a three-divided arc plate-shaped connecting segment 20 and is formed by joining the connecting segments 20 into a tubular shape. An inner wall of the tunnel is formed by arranging a plurality of segment rings 10 continuously in the axial direction of the tunnel and joining the two segment rings arranged at the front and rear with an inter-ring joint (not shown) or the like. Is lined in a tubular shape.

The connecting segment 20 comprises a left hinge segment 21 and a right hinge segment 22. The left hinge segment 21 and the right hinge segment 22 are transported to the location where the segment ring 10 is attached inside the tunnel, and then one end surface of each of the left hinge segment 21 and the right hinge segment 22 is joined to each other to connect the segment segments. Make up 20. The left hinge segment 21 has a left end face 21a of its left and right end faces.
The hinge joint 21b is provided over substantially the entire length of the end face 21a. And the hinge joint 2
1b can behave as a hinge structure by being joined to a hinge joint provided in another connecting segment described later. The other end surface 2 of the left hinge segment 21
1c is basically a flat surface, and one end surface 22c of the right hinge segment 22 is also a substantially flat surface.
Is butt-joined with the metal fitting 23.

The right hinge segment 22 is provided with a hinge joint 22b on the right end face 22a of the left and right end faces thereof over substantially the entire length of the end face 22a. Then, the hinge joint 22b can behave as a hinge structure by being joined with a hinge joint provided in another connecting segment. The other end surface 22c of the right hinge segment 22 is basically a substantially flat surface, and is butt-joined to the one end surface 21c of the left hinge segment 21 by the joint metal piece 23 as described above.

In this way, the end faces (21c, 22) on the plane side of the left hinge segment 21 and the right hinge segment 22 are formed.
c) By joining the left hinge segment 21 and the right hinge segment 22, the left and right end surfaces of the connecting segment 20 composed of the left hinge segment 21 and the right hinge segment 22 have the hinge joint 21b and the right hinge segment 22 of the left hinge segment 21. The hinge joint 22b will be located. Then, as described above, the hinge joint 21b of the connecting segment is joined to the hinge joint 22b of the other connecting segment having the same configuration, whereby the three connecting segments are joined by the hinge joint, and the segment ring 10 is joined. Make up.

Therefore, in the segment ring 10 according to the present embodiment, the hinge joint 21b included in the left hinge segment 21 and the hinge joint 22b included in the right hinge segment 22 are joined together as a hinge structure so that the left hinge segment 21 and the right hinge segment 21 are joined together. Since the hinge segments 22 can be joined together by using a well-known joint metal fitting 23, the segment ring 1
The workability of 0 is improved. Further, the segment ring 10 shown in the present embodiment is constituted by three divisions, and has a stable structure in terms of strength. Further, since a joint metal fitting for joining the connecting segments is not necessary, the cost for constructing the segment ring 10 can be reduced. Further, the connecting segments 20 can be easily joined to each other, and the workability of the segment ring 10 is improved.

As a method of joining the left hinge segment 21 and the right hinge segment 22 using the joint metal piece 23, for example, as shown in FIG. 2, a bolt hole 24a is formed in the end surface 21d on the plane side of the left hinge segment 21. To provide. Similarly, a bolt hole 24a is provided in the end surface 22d on the plane side of the right hinge segment 22. Then, in a state where the end faces on the respective flat sides are butted against each other, the bolts 23a are inserted into the bolt holes 24a through the bolt fastening openings 24b provided inside the respective segments, and the joint hardware 23 is inserted. A well-known joining method such as a method of fastening with a nut in the other segment is used.

Next, a method of constructing the above segment ring will be described with reference to FIG. First, the plurality of left hinge segments 21 and the plurality of right hinge segments 22 are conveyed to the position where the segment ring 10 is arranged in the tunnel. Then, the left hinge segment 21 and the right hinge segment 22 are arranged so as to be staggered along the inner circumference of the tunnel. At this time, the left hinge segment 2
1 and the right hinge segment 22 are arranged on the inner circumference of the tunnel by, for example, a method of arranging from the radial direction of the tunnel or a method of inserting from the axial direction of the tunnel, as in the ordinary shield construction method.

Then, the connecting segment 20 is formed by joining the flat hinge end surface 21c of the left hinge segment 21 and the flat hinge end surface 22c of the right hinge segment 22 with each other by the joint metal piece 23. Further, the hinge joint 21b of the left hinge segment 21 and the hinge joint 22b of the right hinge segment 22 are joined together.

By the above work, the segment ring 1
A segment ring 10 is constructed that is joined by hinge joints at three points on the circumference of 0. Such segment rings 10 are continuously arranged in the axial direction of the tunnel so that the hinge joints of the segment rings are arranged at the same position. And segment ring 1
The inner wall of the tunnel is lined by injecting a backfill material for filling the space between 0 and the ground (not shown).

According to the method of constructing the segment ring according to the present embodiment, the connecting segment 20 is composed of a plurality of segments such as the left hinge segment 21 and the right hinge segment 22. Then, since these segments are conveyed to the location where the segment ring 10 is disposed and joined at the location, the connection segment 20 having a large size can be constructed. Therefore, by constructing the segment ring 10 by joining the three connecting segments 20 constructed in this way in a tubular shape, the segment ring of the three-part structure which is an internally statically determinable structure can be formed into a tunnel ring with a large outer diameter. It can be used as a lining member.

Further, since the segment ring 10 has a hinge structure, it has a stable structure capable of effectively absorbing and dispersing internal and external loads applied to the segment ring itself. Then, as described above, each segment ring 10 is connected to the segment ring 1
By constructing the tunnel lining by arranging the hinge joint portions of 0 so as to be continuous in the length direction of the tunnel, the advantages provided by the segment ring having the above-mentioned hinge structure are provided in the entire tunnel lining. It can be used effectively. That is, for example, when a load is applied to a part of the surface side of the tunnel lining and the hinge joint parts are not arranged continuously, the plurality of segment rings at the load position have different bending directions. Will do. However, when the hinge joint portions are continuously arranged, the plurality of segment rings at the load position are uniformly bent, so that the load can be efficiently absorbed and dispersed.

As shown in FIG. 3, when constructing the connecting segment 90, an arc plate-shaped plate is provided between the left hinge segment 91 and the right hinge segment 92, and the left and right end surfaces are substantially flat. It is also possible to construct the connection segment 90 by interposing the flat segment 93 formed as described above and integrally joining these segments by the joint metal piece 23.
Further, although not shown, a joint tape between the respective connecting segments or a joint portion between the segment rings is pasted with a water blocking tape, a water blocking plate or the like as a structure for enhancing the water blocking ability at these joint portions. Is also good. Note that the present invention can be used for an underground structure having a curved portion in its cross section, and is therefore not limited to the circular tunnel lining segment shown in the above-described embodiment, but an oval or It can be used as a segment for tunnel lining such as a horseshoe shape, and can also be used as, for example, a circular underground continuous wall. In this case, the continuous wall is composed of a plurality of wall portions, and the wall portions are joined by a hinge structure. Further, the outer shell portion of other underground structure may be provided by connecting plate bodies such as the above-mentioned segment, and a hinge structure may be used for joining the plate bodies at the curved surface portion.

[0029]

According to the segment ring of the first aspect, when the segments are joined together at the time of construction of the segment ring, a hinge joint of one segment,
Since it is possible to join the hinge joints of other segments, or the planes of two adjacent segments can be joined together using a known joint metal fitting, the workability of the segment ring is improved. Further, at a portion joined by a hinge joint, a joint metal for joining the segments to each other is unnecessary, and the cost for manufacturing the segment ring can be reduced. Moreover, since the segment ring is constructed by the hinge structure, the structure is stable in strength. Further, the connecting segments can be easily joined to each other, and the workability of the segment ring is improved. Each connecting segment is composed of a plurality of segments such as a left hinge segment, a right hinge segment, and a flat segment. Then, if these segments are transported to the place where the segment ring is arranged and are joined at the place,
It is possible to construct a connecting segment having a large size.
Therefore, it is possible to use the segment ring as a lining member for a tunnel having a large outer diameter by constructing a segment ring by joining three connecting segments in a tubular shape.

According to the segment ring lining method of the second aspect, the same effect as that of the first aspect can be obtained.

[0031]

[0032]

[0033]

[Brief description of drawings]

FIG. 1 is a front view showing a structure of a segment ring according to the present embodiment.

FIG. 2 is a perspective view of a main part showing a method of joining a convex segment and a concave segment.

FIG. 3 is a front view showing a structure of a segment ring according to the present embodiment.

FIG. 4 is a front view showing the structure of a conventional segment ring.

[Explanation of symbols]

10 segment ring 20 consolidated segments 21 convex segment 21b convex part 21c End face 22 Recessed segment 22b recess 22c end face 23 Joint hardware 30 First consolidated segment 31b end face 32b end face 40 Second Consolidated Segment 40a end face 40b end face 50 Third Consolidated Segment 50a end face 50b end face 60 segment ring 93 Flat segment

Claims (2)

(57) [Claims] 1. A segment ring, which is used when lining a tunnel and is composed of arcuate plate-shaped segments, wherein the segment has a hinge joint on a left end face, and a right end face is a substantially flat surface. A certain left hinge segment, a hinge joint on the right end surface, a right hinge segment whose left end surface is a substantially flat surface, and a flat segment whose left and right end surfaces are substantially a flat surface, the left hinge segment and the above Between the right hinge segment, the flat segment is interposed, a connecting segment is formed by integrally joining these segments with a joint metal, and the hinge joints of the three connecting segments are joined as a hinge structure, A segment ring formed in a ring shape. 2. The segment ring lining method according to claim 1, wherein the left hinge segment and the right hinge segment are sequentially arranged on the inner circumference of the tunnel in the radial or axial direction of the tunnel, Joining the hinge joint of the hinge segment and the hinge joint of the right hinge segment as a hinge structure, interposing the flat segment between the end surface on the plane side of the left hinge segment and the end surface on the plane side of the right hinge segment. A method for lining a segment ring, wherein the three connecting segments are formed in a ring shape by joining the respective planes with a joint metal.