JPH076239Y2 - Lining segment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a segment for tunnel lining.

(Prior Art) Conventionally, a segment having a rectangular plane shape has been used to form a cylindrical lining along the wall surface of a tunnel excavated by a shield machine (Japanese Patent Laid-Open No. 50-7336). reference).

(Problems to be solved by the invention) When forming a lining, a plurality of the conventional segments are aligned in the circumferential direction of the cylinder in consideration of distribution of a main load applied to the lining to each segment. And assembled so as to be axially non-aligned, or axially aligned and circumferentially non-aligned.

By the way, a torsional force or an axial force may act on the lining due to the occurrence of an earthquake or ground subsidence. The twisting force acts on the ring-shaped segment group and the segment group that are aligned in the circumferential direction so that they move relative to each other around the axis, and the axial force is the segment group that is aligned in the axial direction. And the segment group so that they move relative to each other in the axial direction. Under the action of the twisting force or the axial force, the relative positions of the adjacent groups of segments are maintained by a connecting means such as a bolt-nut assembly that interconnects the individual segments. Is subject to shearing.

In view of such circumstances, the applicant can first reduce the shearing force received by the connecting means when the torsional force or the axial force acts, thereby avoiding breakage or the like of the connecting means. Proposal of possible segments (Japanese Patent Application No. 62-30
No. 3632).

In this segment, one of the axial side portions in the axial direction thereof is connected to one and the other of the circumferential side portions in the circumferential direction, respectively, and the first side surface portion and the second side surface facing the other axial side portion. And a third side surface portion that is connected to both side surface portions in a stepwise manner and that faces the one circumferential direction side portion in the circumferential direction. In a lining formed using this segment, the pair of segments adjacent to each other in the circumferential direction are in contact with each other on one and the other of the circumferential side portions, and the pair of segments adjacent to each other in the axial direction is Third of that one segment
A side surface portion and a second side surface portion, and a portion of one circumferential side portion and a portion of the other axial side portion of the other segment abut each other.

Due to this mutual abutment, the circumferentially adjacent segments are not aligned in the circumferential direction, and the axially adjacent segments are not aligned in the axial direction, so that the segments are locked to each other in the circumferential direction. From this fact, most of the twisting force and the axial force acting on the lining due to an earthquake or ground subsidence are transmitted to each segment through mutual engagement in the circumferential direction and the axial direction of the segment. To be done. Therefore, the action of excessive shearing force on the connecting means for connecting the segments to each other is prevented.

However, due to a main load such as earth cover pressure applied to the lining or a secondary load such as an earthquake load, external forces such as bending force, shearing force, and torsional force are present in the vicinity of the third side surface portion of the segment. concentrate. In particular, when the segment is made of concrete, the concentration of the external force may cause cracks or defects in the vicinity of the third side surface portion and a part of the adjacent segment that abuts the side surface portion.

An object of the present invention is to provide a concrete segment having an axial side portion defined by the first and second side surface portions extending in the circumferential direction and a third side surface portion continuous with both side surface portions and extending in the axial direction. A concrete segment that prevents mutual damage between the vicinity of the third side surface portion and a part of another concrete segment that abuts against the third side surface portion and that can be interconnected at these portions is provided. Especially.

(Means for Solving the Problem) In the present invention, one axial side portion is connected to one circumferential side portion and the other circumferential side portion, respectively, and is opposed to the other axial side portion. A concrete lining segment comprising a side surface portion and a second side surface portion, and a third side surface portion which is continuous with both side surface portions and faces the one circumferential direction side portion in the circumferential direction. Of the side surface portion and the third side surface portion are reinforced by first reinforcing means defining at least a part of each side surface portion, and one circumferential side portion and the other axial side portion of each side portion are Reinforced by at least a part of second reinforcing means, the first reinforcing means has a through hole penetrating the third side surface part, and defines a space in the concrete which is continuous with the through hole. The second auxiliary member is composed of a reinforcing member. The strong means comprises a reinforcing member having a through hole penetrating a part of the one circumferential side portion and defining a space continuous with the through hole in the concrete.

(Operation and Effect of the Invention) According to the present invention, the lining and the third side surface portion and the second side surface portion of one segment, which is a mutual joining point of the pair of axially adjacent segments, are formed. At least a part and part of one circumferential side portion and the other axial side portion of the other segment are reinforced by the first reinforcing means and the second reinforcing means, respectively. It is possible to avoid breakage of concrete, damage such as cracks due to a load intensively acting on the joint portion of both segments due to the action of an external force on the lining. Since the reinforcing means respectively define a part of the portion to which they are applied, the joining surfaces of both segments are in the same plane, so that there is no gap between both segments.

Further, the through hole of each reinforcing means enables communication of the bolt of the segment connecting means such as a bolt and a nut screwed with the bolt, and the space of each reinforcing means is the extension space of the segment connecting means and the A care space is provided when arranging the segment connecting means. From this,
Both segments can be connected to each other at the third side surface portion of one segment, which is a reinforcing portion, and a part of one circumferential side portion of the other segment.

(Embodiment) The features of the present invention will be further clarified by the following description of the illustrated embodiment.

First, a concrete segment having a shape to which the present invention is applied will be described with reference to FIG.

The segment 10 is assembled along the wall surface of a tunnel (not shown) excavated by a shield machine (not shown) to provide a cylindrical lining.

The segment 10 is connected to two axial side portions 12 and 14 with respect to the axial direction of the cylinder, two circumferential side portions 16 and 18 with respect to the circumferential direction of the cylinder, and both axial side portions and both circumferential side portions. Further, it has an inner peripheral surface portion 20 and an outer peripheral surface portion 22 that extend along the cylindrical surface at a distance from each other.

One axial side 12 comprises three side parts 12a-12c. On the other hand, the other axial side portion 14 is composed of one surface extending in the circumferential direction. Both side portions 16, 18 are respectively
It consists of one surface extending in the axial direction, one circumferential side 16 having a greater axial length than the other circumferential side 18.

A first side surface portion 12a adjacent to one circumferential side portion 16 and a second side surface portion 12b adjacent to the other circumferential side portion 18
Both extend in the circumferential direction and face the other axial side portion 14 and have substantially the same circumferential length. This first
Also, the circumferential lengths of the second side surface portions can be set to different dimensions. The third side surface portion 12c connected to the first and second side surface portions 12a, 12b extends in the axial direction and faces one circumferential side portion 16 in the circumferential direction.

Said plurality of segments constituting the lining, with respect to a pair of segments 10, 10 ₁ adjacent axially with each other, and a second side portion 12b and the third side portion 12c of the one segment 10, the other segments 10 _A portion of one circumferential side portion 16 of one and a portion of the other axial side portion 14 adjacent to the one portion abut, and a pair of segments 10 ₁ and 10 ₂ that are circumferentially adjacent to each other. With respect to the above, the remaining portion of the one circumferential side portion 16 of the one segment 10 _{1 and} the other circumferential side portion 18 of the other segment 10 ₂ are arranged to abut.
For segments 10 and 10 ₂ , one segment 10
A first side portion 12a of abuts each other as part of the other axial side 14 of the segment 10 _2.

The second side portion 12b of the segment 10 is
And the third side surface portion 12c is reinforced by the first reinforcing means 24 defining at least a part of each, and at least a part of each of the one circumferential side portion 16 and the other axial side portion 14 is provided. It is reinforced by the second reinforcing means 26 defined.

The illustrated first reinforcing means 24 and the second reinforcing means 26 each consist of an angled reinforcing plate 28,30, preferably of steel. In the illustrated example, when the reinforcing plates 28, 30 are overlapped with each other, the outer corner surface of the reinforcing plate 28 and the outer corner surface of the reinforcing plate 30 are aligned and abutted so as to be aligned and in contact with each other. The dimensions are defined.

The reinforcing plate 28 has a thickness of the segment 10 (both inner and outer peripheral surface portions 20, 2
It has a width dimension almost equal to the distance between the two) and is partially exposed and embedded in concrete. That is, one side portion 28a and the other side portion 28b of the reinforcing plate 28 are embedded in concrete so as to respectively define a part of the second side surface portion 12b and the entire third side surface portion 12c of the segment. The rest of the side surface portion 12b and the surface of the one side portion 28a of the reinforcing plate on the inside corner side are in the same plane.

The reinforcing plate 30 is embedded in concrete so that the surface on the protruding corner side is exposed, while the reinforcing plate 28 is embedded so that the surface on the entering corner side is exposed. Both sides of the plate member defining one part of the axial side part 14 and part of the circumferential side part 16 on one side 30a and the other side 30b on the projected corner side include the remaining part of the axial side 14. In-plane and circumferential sides
Each is in a plane containing the rest of the 16.

From the above, in the pair of mutually adjacent segments 10, 10 ₁ forming the lining, one segment
Ten reinforcing plates (first reinforcing means) 28 and the other segment 10
_{The first} reinforcing plate 30 is aligned with and abuts each other, and the remaining portion of the second side surface portion 12b of one segment 10 and the remaining portion of the axial side portion 14 of the other segment 10 ₁ are in close contact with each other. Due to the mutual joining of both reinforcing plates 28, 30 that protect the concrete surface, it occurs with the action of external force on the lining,
These damages due to stress concentration on the third side surface portion 12c of one segment and its vicinity and on the corner portion defined by the axial side portion 14 and the circumferential side portion 16 of the other segment and its vicinity are prevented. .

The first reinforcing means 24 is obtained by modifying one side portion 28a of the reinforcing plate 28 so that it can define the entire second side surface portion 12b, and the other side portion 28b of the third side surface portion 12c. It is possible to use a member which is deformed so as to define a part thereof, and the second reinforcing means 26 includes one side portion 30a of the reinforcing plate 30.
It is possible to use the one that is deformed so as to define the entire axial side portion 14, the other side portion 30b that is modified so as to define the entire circumferential side portion 16, and the like. Further, each reinforcing means may be composed of a pair of plate members (not shown) in which one side portion and the other side portion of the reinforcing plate are not integrated but separated. Further, a plurality of plate pieces (not shown) may be used instead of each plate member.

2 to 4 show a concrete segment 32 according to the present invention.
Indicates. The segment 32 has a first reinforcing means 25 and a second reinforcing means 27.

The first reinforcing means 25 is embedded in concrete and
An angle-shaped plate portion 34 having the same shape as the reinforcing plate 28 shown in the figure and occupying the same portion of the segment, and a pair of flat plate portions 36, 38 continuous with the plate portion and having the same width dimension as the plate portion.
And a reinforcing member 39 having The flat plate portion 36 includes a part of the second side surface portion 12b of the segment 32 and the third side surface portion 1
One side of the angled plate portion 34 that defines the entire 2c
It extends in the circumferential direction from the intersection of 34a and the other side portion 34b to the side opposite to the one side portion 34a. Further, the flat plate portion 38 extends in the circumferential direction from the other side portion 34b so as to face the flat plate portion 36, and defines a part of the first side surface portion 12a. Both flat plate portions 36, 38 have the same circumferential length, and both flat plate portions cooperate with the angled plate portion 34 (more specifically, the other side portion 34b) to define a rectangular parallelepiped space 40 in concrete. To do. The space 40 opens at the inner peripheral surface of the segment 32. When forming the segment, the space is filled with an easily removable material such as a plastic foam material in a portion surrounded by the other side portion 34b and the both flat plate portions 36, 38, and this is removed at the time of demolding or thereafter. It can be formed by breaking and removing.

Further, the second reinforcing means 27 is embedded in concrete, has the same shape as the reinforcing plate 30 in the example shown in FIG. It comprises a reinforcing member 45 having a flat plate portion 44.
The flat plate portion 44 is connected to the other side portion 42b of the angle-shaped plate portion 42 that defines a part of the circumferential side portion 16 of the segment 32, and one side of the angle-shaped plate portion 42 that defines a part of the axial side portion 14. Part 42
It extends in the circumferential direction facing a and has the same circumferential length as the one side portion and the same width dimension as the plate portion 42. The flat plate portion 44 cooperates with the angle-shaped plate portion 42 to define the same rectangular parallelepiped space 46 as the space 40.

Substantially the central portion of the other side portion 34b of the angled plate portion 34 of the reinforcing member 39 that is the first reinforcing means, and approximately the other side portion 42b of the angled plate portion 42 of the reinforcing member 45 that is the second reinforcing means. Through holes 48 and 50 for bolts, which will be described later, are provided in the central portion, respectively. A pair of segments 32, in the axial direction,
When arranged in the same relationship as a pair of segments 10,10 ₁ (FIG. 1), both through holes 48,50 are aligned.

The reinforcing members 39 and 45 are connected to each other by connecting means (not shown) such as bolts and nuts screwed to the third side surface portion 12c of the pair of adjacent segments and the portion opposite to the third side surface portion 12c. Used for consolidation. The bolt can be passed from one of the spaces 40 and 46 of both the reinforcing members to the through holes 48 and 50 in the aligned state, and the nut can be introduced into the other of the spaces to be screwed into the bolt. it can. When connecting the segments 32 to each other by the bolts and nuts, one space guides the bolt to the through hole and allows insertion of one hand or a finger of an operator holding the bolt, and the other space is Allow the insertion of the other hand of the operator or his finger to guide the nut into position and screw it into the bolt. That is, each space is used as a maintenance space.

The angle-shaped plate portions 34, 42 of both the reinforcing members can be modified according to the modification of the reinforcing plates 28, 30 shown in FIG. Further, each reinforcing member can be deformed as needed. For example, the plate portions 36 and 38 of the reinforcing member 39 can be set such that their circumferential lengths are different from each other, and
It is also possible to set these plate portions 36, 38 so as to define a space having a shape other than a rectangular parallelepiped. Further, by setting the plate portion 44 of the reinforcing member 45 so as to extend in a direction different from the illustrated example, it is possible to set a space having a shape other than the rectangular parallelepiped.

[Brief description of drawings]

FIG. 1 is a perspective view of a concrete segment, FIG. 2 is a plan view of the concrete segment according to the present invention as seen from the inner peripheral surface side, and FIGS. 3 and 4 are segments according to the present invention. FIG. 3 is an enlarged perspective view of first and second reinforcing means in FIG. 12,14: One and the other axial side, 12a, 12b and 1
2c: first, second and third side surface portions, 16, 18: one and the other circumferential side portions, 25, 27: first and second reinforcing means, 32: segment, 39, 45: reinforcing member , 40, 46: space, 48,
50: Through hole.

Claims (1)

[Scope of utility model registration request] 1. A cylindrical lining for a tunnel, wherein one of the axial side portions (12) of the cylinder with respect to the axial direction is one of the circumferential side portions (1) of the cylinder with respect to the circumferential direction.
6, 18) respectively and the other axial side (14)
To a first side surface portion (12a) and a second side surface portion (12b) facing each other, and to the first and second side surface portions,
A third member that faces one circumferential side portion (16) in the circumferential direction.
A lining segment (32) made of concrete including a side portion (12c) of the first side portion, the second side portion and the third side portion defining at least a part of them. (25), and the one side portion in the circumferential direction and the other side portion in the axial direction are reinforced by a second reinforcing means (27) that defines at least a part of them, and the first reinforcement is obtained. The means includes a reinforcing member (39) having a through hole (48) penetrating the third side surface portion and defining a space (40) continuous with the through hole in concrete, and the second reinforcing means. Is a lining having a through hole (50) penetrating a part of the one circumferential side portion and a reinforcing member (45) defining a space (46) continuous with the through hole in the concrete. Segment.