JPH07103789B2 - Taper segment and tunnel lining method using taper segment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a taper segment used for lining a curved portion of a tunnel excavated by a shield method and a tunnel lining method using the taper segment.

[0002]

2. Description of the Related Art In recent years, when building long-distance tunnels,
As shown in FIG. 5, a tunnel lining has been developed with a hexagonal segment 21 whose opposite sides are parallel to each other. If this tortoiseshell-shaped segment 21 is used, the segments that are sequentially staggered in the circumferential direction of the tunnel and that are adjacent to each other in the direction are formed by the inclined end faces of the two segments that are linked in the tunnel length direction. The V-shaped end faces are joined to the inclined end faces 23 and 24 on both sides in a fitted state.

Therefore, the end face of the lining tunnel in the length direction of the tunnel is the protruding end face 22 formed by the half of the protruding segment 21.
And the equipotential trapezoidal space where the next half of the segment fits are formed alternately in the tunnel circumferential direction, and the shield machine is propelled to the other exposed end face while assembling the segment in any equipodal trapezoidal space. Since it is possible to continuously excavate the tunnel by taking the reaction force of the jack, it is possible to improve the construction efficiency.

[0004]

However, when the hexagonal-shaped segment is used, the segments having the same shape are sequentially fitted into the isosceles trapezoidal space portion and combined, so that the straight tunnel portion is covered. Even if it is easy to work, when lining a curved or meandering curved tunnel, the shape of the correction segment is extremely complicated in the hexagonal segment, which is expensive and the assembly work is complicated. It was

The present invention solves the above problems and provides a taper segment and a tunnel lining method using the taper segment, which enables smooth and efficient continuous lining from the straight line portion of the tunnel to the curved line portion of the tunnel. It is intended to be provided.

[0006]

To achieve the above object, the taper segment of the present invention has one half formed in an isosceles trapezoidal portion and the other half formed in an unequal legs trapezoidal portion. Is a hexagonal segment that has an apex side end face of the unequal leg trapezoidal part facing the top side end face of the isosceles trapezoidal part, and the width between these side end faces is the hexagonal segment tunnel length direction. It is characterized in that it is inclined so as to become wider or narrower from one V-shaped inclined end face side directed toward the other toward the other V-shaped inclined end face.

Using the taper segment having the above structure,
As described in claim 2 as a method for continuously forming a lining of a curved line portion from a straight line portion of a tunnel, first, between the protruding half halves of adjacent turtle shell segments formed at several front end faces of the straight line portion of the tunnel. The isosceles trapezoidal portion of the taper segment is sequentially fitted and assembled in the trapezoidal space so that the extension line of the apex side end surface of the unequal leg trapezoidal portion is directed to the bending center of the tunnel. Then, the unequal leg trapezoidal portions of the taper segment are sequentially fitted into the unequal leg trapezoidal space formed between the protruding unequal leg trapezoidal portions of the taper segments adjacent to each other in the tunnel circumferential direction, and assembled. It is characterized in that the curved portion of the tunnel lining is formed by repeating the work.

As another method of the present invention for forming such a curved portion of the tunnel lining, the long-side end surface curved in the tunnel circumferential direction and the short-side end surface are opposed to each other at a predetermined inclination angle. Further, a quadrilateral taper segment formed by forming an inclined end face inclined between the both ends of the long and short side end faces at the same angle with respect to the long side end face is used. Then, first, a plurality of taper segments having such a shape are assembled in the tunnel circumferential direction while joining the opposite tilted end faces having the same length to each other to form a tilted taper segment ring. Then, the long side or the short side end surface of each taper segment of this taper segment ring is joined to the long side or the short side end surface of the taper segment having the same length as each end surface to form the next taper segment ring. Then, the curved portion of the tunnel lining is formed by repeating this work.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a hexagonal taper segment having a hexagonal shape, and one half of the hexagonal segment 21 is formed in parallel with each other on opposite sides. 1a, the other half is an unequal leg trapezoidal part
It is formed in 1b.

Further, the outer peripheral end face of the isosceles trapezoidal portion 1a has the same length which is inclined outwardly from both ends of the apex side end face 2 and the both ends of the apex side end face 2 in the circumferential direction of the tunnel with the same inclination. Is formed from the inclined end faces 3 and 3. On the other hand, the outer peripheral end surface of the unequal leg trapezoidal portion 1b has the same length as the apex side end surface 2 of the isosceles trapezoidal portion 1a and the end surface 22 of the hexagonal segment 21 and faces toward the center of the tunnel curve. It is formed of an inclined apex side end surface 4 and inclined end surfaces 5 and 6 having different lengths extending from both ends of the apex side end surface 4 to the inclined end surfaces 3 and 3 of the isosceles trapezoidal portion 1a.

Therefore, the isosceles trapezoidal portion 1a and the unequal legs trapezoidal portion 1a
The opposite apex side end faces 2 and 4 which have a long side in common with 1b and are short sides face each other in parallel and are unequal legs with respect to the apex side end face 2 of the isosceles trapezoidal portion 1a. The top side end surface 4 of the shaped portion 1b is in a slanted state. Furthermore, the angles formed by the inclined end faces 3, 3, 5 and 6 with respect to the common long side of the isosceles trapezoidal portion 1a and the unequal legs trapezoidal portion 1b are all formed at the same angle. In addition, the bolt-side connecting holes 7 are formed at regular intervals in the length direction on the top side end faces 2 and 4 and these inclined end faces 3, 5 and 6.
Is provided and curved in the tunnel circumferential direction from the V-shaped joint end face side formed by the inclined end faces toward the other V-shaped joint end face as a whole in the length direction of the top side end face. ing.

A method of lining the tunnel curve portion B connected to the tunnel straight portion A as shown in FIG. 2 by using the taper segment 1 thus constructed will be described.

First, as for the shape of the lining end surface of the straight section A of the tunnel, as shown in FIG. 5, the hexagonal segments 21 are assembled in a zigzag manner in the circumferential direction of the tunnel, and these segments 21 are formed.
Has one half of its isosceles trapezoidal protruding every other, and these segments are located between the adjacent protruding half.
The end face 22 of the segment 21 assembled between the facing inclined end faces 23, 24 of 21, 21 and the other facing inclined end face of the segment
A space C having an isosceles trapezoidal shape is formed by and.

In this space C, as shown in FIGS. 2 and 4,
When the isosceles trapezoidal portion 1a of the taper segment 1 is fitted, since the isosceles trapezoidal portion 1a is formed in the same shape as the space C, the apex side end face 2 thereof is exposed in the space C. It is joined to the end face 22 of the turtle shell-shaped segment 21 and the inclined end face 3,
3 is joined to the opposed inclined end faces 23, 24 and assembled in a state where the isosceles trapezoidal portion 1a is completely fitted in the space C, and the unequal leg trapezoidal portion 1b of the taper segment 1 is The inclined end faces 5 and 6 project from the end faces 22 and 22 in a state of being connected to the end portions of the end faces 22 and 22 of the segments 21 and 21 adjacent to each other in the tunnel circumferential direction.

Similarly, the taper segment 1 is formed in a plurality of space portions C formed on the lining end surface of the straight tunnel portion A.
When the isosceles trapezoidal portions 1a of the above are sequentially fitted and assembled, the tapered segments 1 have their unequal leg trapezoidal portions 1b protruding from the end surface 22 of the tortoise shell segment 21 and are adjacent in the tunnel circumferential direction. An unequal leg trapezoidal space portion D is formed between the unequal leg trapezoidal portions 1b.

At this time, in each taper segment 1 into which the isosceles trapezoidal portion 1a is fitted in the space C, the isosceles trapezoidal portion 1a has the same shape and size as shown in FIG. However, in the unequal leg trapezoidal portion 1b, the taper segment 1 arranged toward the bending direction of the tunnel, that is, toward the center point of the curve, has the width gradually decreased so that the tapered end faces 5 and 6 are formed. The lengths are successively shortened. And
The length of the short inclined end surface 6 of the upper taper segment 1 and the long inclined end surface 5 of the lower taper segment 1 joined to the taper segment 1 are formed to be the same, and the segment ring assembled by these taper segments 1 is formed. The top side end surfaces 4 are all arranged on a straight line toward the curved center point of the tunnel.

Then, as described above, the tapered segment 1
Each unequal leg trapezoidal space D formed by the assembly of
Further, when the unequal leg trapezoidal portions 1b of the taper segment 1 formed on the unequal leg trapezoidal portions 1b having the same shape and size as the respective space portions D are sequentially fitted and assembled, the tunnel circumferential direction Between the projecting isosceles trapezoidal portions 1a, 1a adjacent to each other, an isosceles trapezoidal space portion C is formed, and the isosceles trapezoidal portion 1a of the taper segment 1 is sequentially arranged in this isosceles trapezoidal space portion C. Mate and assemble.

In the same manner, the taper segment 1 is assembled according to the bending length of the tunnel to lining the tunnel bending portion B, and the end surface of the bending portion B is equilateral trapezoidal space portion. By sequentially assembling the hexagonal segment 21 from this space C so as to form C, the straight tunnel portion A is continuously formed.

In the above embodiment, the tunnel bent portion B was constructed by the hexagonal taper segment 1. However, the construction example of forming the tunnel bent portion B by the square taper segment 11 will be described with reference to FIGS. As described in.

As shown in FIG. 6, the rectangular taper segment 11 used in this construction method has a length equal to the dimension between the apexes of the inclined end faces 23 and 24 of the hexagonal segment 21 (the long side of the isosceles trapezoid). Dimension side) and a long side end surface 12 and a short side end surface 13 having the same length dimension as the end surface 22 of the tortoise shell segment 21, and the ends of the long and short side end surfaces 12 and 13 between the both ends of the tortoise shell segment 21. It has a shape formed on the long and short inclined end faces 14 and 15 which are inclined at the same inclination angle as the inclined end faces 23 and 24.

Further, the whole is formed in a shape that is curved in the tunnel circumferential direction between these inclined end faces 14 and 15, and the curvature of the tunnel from the long inclined end face 14 side toward the short inclined end face 15 side. The width is gradually narrowed to correspond to. Also, the long and short side end faces 12, 13 and the long and short inclined end faces
14 and 15 are provided with bolt connecting holes 7 at regular intervals in the length direction.

When forming the lining of the tunnel bent portion B using the taper segment 11 thus constructed,
First, as shown in FIG. 7, by incorporating the isosceles trapezoidal segments 31 having the same shape and size as the space C in all the isosceles trapezoidal spaces C on the end face of the tunnel straight line portion A, the tunnel straight line The end surface of the part A is formed flush.

Next, the short side end surface 13 of the taper segment 11 is joined to the end surface 22 of each regular hexagonal segment 21 forming this end surface, and the long side end surface 32 of each isosceles trapezoidal segment 31 is tapered. The long side end face 12 of the segment 11 is joined and assembled.

At this time, as shown in FIG. 9, in the vertically adjacent taper segments joined in the bending direction of the tunnel, the short inclined end face 15 of the upper taper segment 11 and the long inclined end face of the lower taper segment 11 are joined. 14 are formed to have the same length dimension, and therefore, these long and short inclined end faces 14,
As shown in FIG. 8, an inclined taper segment ring E for covering a part of the length of the tunnel bending portion B is formed by sequentially joining 15 together.

Next, the long-side end surface 12 of the taper segment 11 and the short-side end surface 13 of the taper segment 11 adjacent to the taper segment 11 which constitute the ring-shaped end surface of the inclined taper segment ring E are sequentially arranged on these sides. End face 12, 13
Taper segment 11 having side end faces 12, 13 of the same length as
Are sequentially joined and assembled to construct the next inclined taper segment E.

Similarly, the inclined taper segment E having the same shape and the same arrangement as the inclined taper segment E formed first is assembled, and this work is performed over the entire length of the tunnel bending portion B.

When the lining work of the tapered segment ring row of the tunnel bent portion B is completed, in the finally assembled tapered segment ring E, the exposed end surface of each tapered segment 11 exposing the long side end surface 12 is exposed. By joining the long side end faces 32 of the isosceles trapezoidal segment 31, the isosceles trapezoidal segment facing in the tunnel circumferential direction.
The regular hexagonal segment 21 is sequentially assembled in the isosceles trapezoidal space C between the facing inclined end faces 31 and 31, and thereafter, the straight straight segment A is formed by the regular hexagonal segment 21.

In the above embodiment, the taper segment 11
The case of assembling one by one was explained, but in advance, the long side end faces 12, 12 of the two segments 11, 11 were joined together and combined into a hexagonal taper segment, and this taper segment is shown in FIG. Similar to the assembling method described above, the assembling may be performed in a staggered manner in the circumferential direction, and by adopting such a method, tunnel excavation and segment assembling can be continuously performed.

[0029]

As described above, according to the present invention, a hexagonal segment having one half formed in an isosceles trapezoidal shape and the other half formed in an unequal leg trapezoidal shape, or a long side The side edges and the short side edges are opposed to each other at a predetermined inclination angle, and the opposing edges are parallel to each other by using a rectangular taper segment formed by an inclined end surface between the ends of the long and short side edges. The curved straight line that is continuous with the straight straight part of the hexagonal segment can be lining accurately and efficiently, and the shape of the hexagonal segment and the taper segment is the parallel side of the hexagonal segment. Since it is set according to the dimensions of the end face and the inclined end face, it is suitable for mass production, and the assembly work of the segments can be performed smoothly and accurately.

[Brief description of drawings]

FIG. 1 is a perspective view of a rectangular taper segment.

[Fig. 2] Side view of the tunnel lining section showing the construction state

FIG. 3 is an end view of a taper segment with a bent tunnel portion.

[Figure 4] Side view of its development

FIG. 5 is a perspective view of a straight section of a tunnel.

FIG. 6 is a perspective view of a square taper segment.

[Fig. 7] Side view of the tunnel lining section showing the construction state

FIG. 8 is an end view of a taper segment with a bent tunnel portion.

FIG. 9 is a developed side view thereof.

[Explanation of symbols]

 1 Hexagonal taper segment 1a Isosceles trapezoidal part 1b Irregular legs trapezoidal part 2, 4 Top side end face 3, 5, 6 Inclined end face 11 Square taper segment 12, 13 Long short side end face 14, 15 Long and short inclined end face A Tunnel Straight section B Tunnel curve section

Claims (3)

[Claims] 1. A hexagonal segment, one half of which is formed into an isosceles trapezoidal portion and the other half of which is formed into a non-isosceles trapezoidal portion. From the one V-shaped inclined end surface side to the other V-shaped inclined end surface side in which the width between these side end surfaces is oriented in the tunnel length direction of the hexagonal segment, the end surfaces of the opposite trapezoidal trapezoidal portions facing each other. A taper segment characterized by being inclined so as to become wider or narrower toward. 2. When continuously forming a straight lining of a tunnel from a straight lining of a tunnel constructed by combining turtle shell-shaped segments whose both end surfaces are parallel to each other, the straight lining is formed at several points on the front end of the straight section of the tunnel. The extension line of the apex side end surface of the unequal leg trapezoidal portion is directed to the bending center of the tunnel in the trapezoidal space between the projecting front halves of the hexagonal segments adjacent to each other in the tunnel circumferential direction. Assemble by sequentially fitting the isosceles trapezoidal portions of the taper segment described in 1 above, and then in the unequal leg trapezoidal space formed between the protruding unequal leg trapezoidal portions of these taper segments adjacent in the tunnel circumferential direction. A tunnel lining method characterized in that a curved portion of the tunnel lining is formed by successively fitting and mounting the unequal leg trapezoidal portions of the taper segment and repeating this operation. 3. A long side end face and a short side end face curved in the tunnel circumferential direction face each other at a predetermined inclination angle, and the ends of these long and short side end faces have the same angle with respect to the long side end face. A plurality of quadrilateral tapered segments formed on the slanted end faces that are slanted with each other are assembled in the tunnel circumferential direction while connecting the facing slanted end faces to each other to form a slanted taper segment ring. Form the next taper segment ring by joining the long side or short side end surface of each taper segment to the long side or short side end surface of the taper segment that has the same length as each end surface, and repeat this operation. A method of lining a tunnel, wherein a curved portion of the tunnel lining is formed by the method.