JPH102196A - Tunnel lining - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tunnel lining which can be more easily executed and which has a higher rigidity, by using trapezoidal segments. SOLUTION: A number of segments 20, 20,... are continuously laid in the peripheral direction around the axial line CT of an excavation hole 1 to form a ring 10 and a cylindrical shape extending to the axial line CT of the excavation hole 1. In this case, respective segments 20, 20,... have a trapezoidal shape with both parallell end faces in the axial line CT direction. The segments 20A adjacently positioned in the peripheral direction are arranged so that both peripheral end faces are tapered forward (arrow mark C direction) in the axial line, in the ring 10. And other segments 20B are arranged so that both peripheral end faces are gradually widened forward in the axial line. And these segments are combined so as to be mutually pressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of segments formed in a ring by connecting a plurality of segments in a circumferential direction around the axis of a drilled hole, and forming a ring in the axial direction of the drilled hole. More particularly, the present invention relates to a tunnel lining that can be easily constructed and has high rigidity.

[0002]

2. Description of the Related Art In a shield construction method for constructing a tunnel,
As the excavation progresses, a method of connecting a large number of segments annularly around the axis of the excavation hole and connecting the segments in the axial direction of the excavation hole to perform tunnel lining has been generalized. The segment used for this tunnel lining is a plate that is curved in a circular arc shape in the circumferential direction around the axis of the excavation hole, and is mainly rectangular.

[0003]

However, with the recent increase in length of tunnels, there is a need for tunnel linings that can be constructed more easily and have higher rigidity as compared with such conventional tunnel linings. Is growing.

[0004] In view of the above circumstances, an object of the present invention is to provide a tunnel lining which can be constructed more easily and has higher rigidity.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a plurality of segments are connected in a plurality in the circumferential direction around the axis of a drill hole to form a ring, and the segments are connected in the axial direction of the drill hole to form a cylindrical shape. In each of the tunnel linings formed in the above, each segment has a trapezoid with both end faces in the axial direction being parallel, and the ring forms one of the two segments circumferentially adjacent to each other. Arranged so that both end faces in the circumferential direction are tapered forward in the axial direction, and the other segment is arranged such that both end faces in the circumferential direction are divergent in the forward direction in the axial direction, and are combined so as to be pressed together. It is characterized by forming.

That is, when forming a ring, a plurality of segments of the ring are formed by a simple operation of pushing a segment arranged such that both end faces in the circumferential direction are divergently forward in the axial direction and rearward in the axial direction. Can be combined so as to be pressed against each other. Further, in the construction, since each segment has the same trapezoidal shape, a complicated assembling procedure is not required. Further, by forming a ring by combining a plurality of segments so as to be pressed together, an internal pressure is applied in the circumferential direction of the ring.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. Tunnel lining 100 of the present embodiment
As shown in FIG. 2, an even number of rings 10 are formed in a circumferential direction (directions of arrows A and B) around the axis CT of the excavation hole 1 to form a ring 10, and as shown in FIG. Are formed in a row in the direction of the axis CT (directions of arrows C and D) to form a cylindrical shape, and the long bolts 35, 3 for fastening the segments 20, 20,... Adjacent in the direction of the axis CT.
.. And the circumferentially adjacent segments 20, 20,.
Are assembled.

A number of segments 20, 20,...
, And the B-shaped segment 2
0B, 20B,... And A-type segment 2
Both the 0A and the B-shaped segments 20B are in the circumferential direction around the axis CT of the excavation hole 1 (arrows A and B directions) as shown in FIG.
Is a plate curved in an arc shape, and as shown in FIG.
Front faces 21A, 21B, rear face 23 which are both end faces in the T direction.
A and 23B are trapezoidal in parallel.

The A-type segment 20A is arranged such that both side surfaces 25A, 25A, which are both end surfaces in the circumferential direction, are tapered forward in the direction of the axis CT (in the direction of arrow C in the drawing). The two side surfaces 25B, 25B, which are both end surfaces in the circumferential direction, are arranged so as to diverge forward in the direction of the axis CT.

The ring 10 is composed of A-type segments 20A and B-type segments 20B alternately arranged in the circumferential direction around the axis CT of the excavation hole 1, and the A-type segments 20A and B which are circumferentially adjacent to each other. The mold segments 20B are combined so as to press the adjacent side surfaces 25A, 25B together, and as shown in FIG.
B is pressed against the inner surface 2 of the excavation hole 1.

As shown in FIG. 1, each ring 10 has A-type segments 20A, 20A,.
The positions of B, 20B,... In the circumferential direction correspond to the circumferences of the A-type segments 20A to 20B with respect to the A-type segments 20A, 20A,. It is shifted by half the length of the direction.

A type segment 20A and B type segment 2
0B denotes two bolt holes 29A, 29A, 29B, 29B penetratingly formed in the direction of the axis CT of the excavation hole 1, respectively.
And these bolt holes 29A, 29A, 29A
B and 29B are bolt holes 29A of the A-type segment 20A or the B-type segment 20B adjacent in the axis CT direction.
It communicates with 29A, 29B and 29B, respectively. Long bolts 35, 35,... Are arranged in the bolt holes 29A, 29A, 29B, 29B,. Each long bolt 35
Is composed of a bolt body 36 having threaded portions at both ends, and a long nut 37 screwed into the threaded portion of the bolt body 36.

The front ends of the bolt holes 29A, 29B,... Are enlarged in diameter to form nut housing portions 29Aa, 29Ba for housing long nuts 37, 37,. The threaded portions behind the main bodies 36, 36,... (In the direction of the arrow D in the figure) are screwed and fixed to the long bolts 35, 35,. , The bolts in front of the bolt bodies 36, 36,... Are arranged to protrude into the nut storage portions 29Aa, 29Ba,. Also, long nuts 37, 37,... Are screwed into threaded portions in front of the bolt bodies 36, 36,.
The A-type segment 20A or the B-type segment 20B on which 7, 37,... Are arranged is tightened so as to press the ring 10 adjacent to the rear.

The front faces 21A and 21B of the A-type segment 20A and the B-type segment 20B have, as shown in FIGS. 3, 4, 6 and 7, convex ridges 22A extending in the circumferential direction.
As shown in FIGS. 3, 5, 6, and 8, the back surfaces 23A, 23B of the A-type segment 20A and the B-type segment 20B have a shape that fits with the ridges 22A, 22B. Grooves 24A and 24B are formed.

As shown in FIGS. 3 and 6, both sides 25A of the A-type segment 20A and the B-type segment 20B,
25A, 25B, and 25B are a pair of convex portions 26, respectively.
A and B segments 20A and B segments 20A, 26A and 27A, 27B
The convex portions 26A and 26B and the concave portions 27A and 27B of B are fitted with each other.

A type segment 20A and B type segment 2
0B, the grout injection holes 20Aa,
20Ba is formed through the grout injection hole 20A.
A holding hardware (not shown) serving as a holding portion at the time of assembly is attached to a and 20Ba.

The inner surface 3 of the A-shaped segment 20A is provided on both side surfaces 25A, 25A of the A-shaped segment 20A in FIG.
6A are formed, and both side surfaces 25 of the B-shaped segment 20B of FIG. 6 are formed.
B, 25B are provided with the assembly bolt insertion holes 31A, 31A.
As shown in FIG. 1, assembling bolt screw holes 31B, 31B are formed in the assembly bolt insertion holes 31A, 31A and the assembly bolt screw holes 31B, 31B. 40, ... are inserted and screwed in,
The A-type segment 20A and the B-type segment 20B that are adjacent to each other in the circumferential direction are further strongly joined.

The tunnel lining 100 has the above configuration. That is, as shown in FIG.
Are combined so as to be pressed against each other in the circumferential direction, so that the ring 1 is normally in the normal state.
0, an internal pressure is generated in the circumferential direction, and therefore, a supporting force is generated on the inner surface 2 side of the excavation hole 1. Therefore, the rigidity of the ring 10 can be improved, and the effect of supporting the excavation hole 1 can be improved.

In addition, the circumferentially adjacent segments 2
The assembly bolts 40, 40,... Shown in FIG.
Therefore, the rigidity of the ring 10 can be further improved.

Each of the adjacent rings 10 has a long bolt 3
5, 35,... And adjacent segments 20, 20,.
And grooves 24A and 24B, or convex portions 26 in FIGS.
A, 26B and recesses 27A, 27B are fitted and joined. Further, as shown in FIG.
, And the circumferential positions of the A-type segments 20A, 20A, ... and the B-type segments 20B, 20B, ... are the same as the A-type segments 20A, 20A, ... and the B-type segments 20B, 20B, ... of the adjacent ring 10. On the other hand, A-type segments 20A, 20A,...
B,... Are shifted by half the length. Therefore, shearing (shift) between the segments 20, 20,... Is prevented.

From the above, the tunnel lining 100
High rigidity can be provided as a whole.

Further, the construction of the tunnel lining 100 can be performed easily and quickly as follows.

That is, the A-type segments 20A, 20A,.
, And the B-shaped segments 20B, 20B,... Are continuously provided in the direction of the axis CT of the borehole 1 with respect to the existing ring 10 at the rear, and are alternately provided in the circumferential direction around the axis CT of the borehole 1. The next ring 10 is formed. At this time, the circumferentially adjacent segments 20, 20,...
By fitting the recesses 27A and 27B into the recesses 6B, the positioning thereof can be performed easily and quickly. In addition, as shown in FIG.
With respect to 0, 20, ..., the ridges 22A, 22B, ...
And the grooves 24A, 24 of the new segments 20, 20,...
By fitting B,..., The positioning can be performed easily and quickly. In addition, each segment 20, 2
0, ... are long bolts 3 for the existing ring 10 at the rear.
, And the assembly bolts 40, 40,... For the circumferentially adjacent segments 20, 20,.
Fix with.

When the ring 10 is formed, finally, the B-shaped segment 20B, which is arranged so that both side surfaces 25B and 25B are widened forward in the axial line CT direction, is slightly pushed backward in the axial line CT direction. By a simple operation of fastening the existing ring 10 with the long bolts 35, 35, the segments 20, 20,... Constituting the ring 10 can be combined so that the segments 20, 20,. , Improvement of rigidity and drilling hole 1
Can be improved.

In the formation of the ring 10, since there are only two types of segments 20, 20,..., A-type segments 20A, 20A,... And B-type segments 20B, 20B,. do not do.

Therefore, the tunnel lining 100 can be constructed more easily and quickly than ever before.

The installation of the segments 20, 20,...
After assembly, each segment 20, 20,...
Is filled with a grout (not shown) through the grout injection holes 20Aa, 20Ba,... Shown in FIG. 1 to fill the gaps between the segments 20, 20,. And further tunnel lining 1
The support effect of 00 is improved.

Since the segments 20, 20,... Are trapezoidal in shape, the segments 20, 20,... Are easier to manufacture than hexagonal or other shapes having a large number of corners. Regarding this manufacturing, since the same one can be used for each of the A-type segment 20A and the B-type segment 20B, manufacturing efficiency can be improved.

The segments 20, 20,.
May be constituted by a concrete plate, a steel plate attached to the outer surface of the concrete plate, or a combination of a large number of steel plates.

In this embodiment, the tunnel lining 10
0 is a primary lining, which is assembled by abutting against the inner surface 2 of the excavation hole 1 and the gap is filled with grout. After the primary lining is performed, the tunnel lining 100 may be brought into contact with the primary lining as a secondary lining to be assembled.

Each segment 20 may be of one type as long as it has a trapezoidal shape and has a bolt hole penetrating in the direction of the axis CT.

[0032]

According to the tunnel lining of the present invention, by forming a ring by combining a plurality of segments so as to be pressed against each other, an internal pressure is generated in the circumferential direction of the ring in a normal state, and the inner surface of the borehole is formed. There is a supporting force on the side. Therefore, the rigidity of the ring can be improved, and the effect of supporting the excavation hole can be improved.

Further, the formation of the ring is such that a plurality of segments are pressed against each other by a simple operation of pushing a segment arranged such that both end surfaces in the circumferential direction are divergently forward in the axial direction toward the rear in the axial direction. The segments can be combined as follows. Furthermore, since each segment has the same trapezoidal shape, complicated assembly procedures are not required. Therefore, the tunnel lining of the present invention can be constructed more easily and has higher rigidity than ever before.

Further, since the segments are trapezoidal in shape, they can be manufactured more easily than hexagonal or other shapes having a large number of corners, and the same segments can be used in large numbers in this manufacturing. Efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of a tunnel lining of the present invention.

FIG. 2 is a front view of the tunnel lining of FIG. 1;

FIG. 3 is a plan view showing one of two types of segments used for the tunnel lining of FIG. 1;

FIG. 4 is a front view of the segment of FIG. 3;

FIG. 5 is a rear view of the segment of FIG. 3;

FIG. 6 is a plan view showing the other of the two types of segments used for the tunnel lining of FIG. 1;

FIG. 7 is a front view of the segment of FIG. 6;

FIG. 8 is a rear view of the segment of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Excavation hole 10 ... Ring 20A (20) ... A-type segment (segment) 20B (20) ... B-type segment (segment) 21A, 21B ... Front (axial end face) 23A, 23B ... Back (axial end face) 25A, 25B ... side surface (end surface in the circumferential direction) 100 ... tunnel lining CT ... axis line

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kazuo Miyazawa Shimizu Corporation, 2-3-2 Shibaura, Minato-ku, Tokyo

Claims (1)

[Claims] 1. A tunnel lining formed by connecting a plurality of segments in a circumferential direction around an axis of a digging hole to form a ring and connecting the segments in the axial direction of the digging hole to form a cylinder. In the above, each of the segments forms a trapezoid with both end faces in the axial direction parallel to each other, and the ring moves one of the segments adjacent to each other in the circumferential direction in the circumferential direction. Are arranged such that both end faces thereof are tapered forward in the axial direction, and the other segment is arranged such that both end faces in the circumferential direction are divergently forward in the axial direction, so that they are pressed against each other. Tunnel lining characterized by being formed in combination.