JP3235967B2 - Tunnel forming method and tunnel for forming tunnel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art A conventional tunnel forming method is performed according to the following procedure. First, the ground 31 is excavated by the excavator 36 and the side hole 32 is excavated.
A center 33 supported by a portal structure 34 is disposed in the lateral hole 32 with an appropriate gap interposed between the inner wall surface 32a of the lateral hole 32 and the inner wall surface 32a.
Window at the right side and top of the center 33
The lining concrete 35 is poured from the window hole 33a, and the filling condition of the lining concrete 35 is visually observed from the window hole 33a.
From the lining concrete 35
This operation is performed in order from the lower side of the center 33 until the lining concrete 35 reaches the upper side (the window hole 33a at the position where the lining concrete 35 is filled is closed by an appropriate means), and the lining is closed. After the concrete 35 is hardened, the centr 33 is contracted and released from the lining concrete 35, and the centr 33 is moved forward together with the portal structure 34. This is repeated to form a tunnel (FIG. 1, See 2, 3).

The inventor of the present invention has proposed that in the above process, the worker actually pulls out the vibrator 37 by hand from the window hole 33a to compact the lining concrete 35, and furthermore, with the placement of the lining concrete 35, The window 33a leading out of the vibrator 37 must be sequentially changed from the lower window 33a to the upper window 33a.
It was confirmed that the compaction work of 35 was extremely inefficient.

SUMMARY OF THE INVENTION The present invention provides a method for forming a tunnel and a center for forming the tunnel which solve the above-mentioned problems.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

After excavating the ground 1 to form a lateral hole 2, a portal structure 4 in which a centru 3 is disposed is located in the lateral hole 2, and the inner wall 2 a of the lateral hole 2 and the centru 3 are connected. and Da設the lining concrete 5 during, after curing of the lining concrete 5 to advance該門type structure 4, in tunnel formation method for forming a tunnel Repeat this, the outer surface apex of Sentoru 3
A bar-shaped moving body 6 that can move in the length direction of the center 3 is provided at the portion, and the moving body 6 is fixed to one upper side of the center 3.
And a lower rod 6b protruding outwardly, and on the lower rod
An upper rod-shaped body 6a slidably connected to the body 6b;
Further, a vibrator 7 for compacting the lining concrete 5 is provided at an appropriate position of the movable body 6 so as to be able to move up and down.
And a bulging portion 7b having a diameter larger than that of the vibrating portion 7a for preventing contact with the inner wall surface 2a of the horizontal hole 2 is provided. The moving body 6 is moved to an appropriate position on the outer surface of the centrifuge 3, and the vibrator 7 is further lowered to an appropriate position. The present invention relates to a method for forming a tunnel.

Further, a Sentoru 3 arch shapes used in the formation of the tunnel, the outer surface top is provided movable body 6 of the rod-shaped moving to Sentoru 3 longitudinally, this
Moving body 6 is fixed to one upper side of the center 3 and
The lower rod 6b protruding and the lower rod 6b
And an upper rod-like body 6a slidably connected.
Further, a string body 8 which moves up and down with respect to the moving body 6 is provided at an appropriate position of the moving body 6, and a vibrator 7 for compacting the lining concrete 5 is provided on the string body 8. Is a vibrating portion 7a for preventing the vibrating portion 7a from contacting the inner wall 2a of the center 3 or the lateral hole 2.
The present invention relates to a tunnel forming centrum, which has a configuration in which a bulging portion 7b having a diameter larger than that of FIG.

[0008] In the tunnel for forming a tunnel according to the second aspect, the cords 8 are provided at appropriate positions on both sides of the moving body 6.
The present invention relates to a tunnel forming centruel, which is characterized in that

[0009]

After the center 3 has been arranged at a predetermined position, the moving body 6 is positioned at an appropriate position on the outer surface of the center 3, and the lining is formed between the center 3 and the inner wall surface 2a of the excavated lateral hole 2. The concrete 5 is cast, the vibrator 7 is lowered, the lining concrete 5 is compacted, the vibrator 7 is gradually raised, and the lining concrete 5 is further poured, and the lining is laid to the vicinity of the moving body 6. When the concrete 5 is cast, the vibrator 7 is raised to a predetermined position, the moving body 6 and the vibrator 7 are moved to the outside of the center 3, and the lining concrete 5 is further cast.

After the lining concrete 5 has hardened, the sentry 3 is removed from the mold, the sentry 3 is moved together with the portal structure 4 , and the same operation is repeated to form a tunnel.

Therefore, the lining concrete can be compacted easily as compared with the conventional method, and the workability is greatly improved.

The vibrator 7 includes a vibrating section 7
When the vibrator 7 having the bulging portion 7b having a diameter larger than that of the vibrator 7 is employed, the vibrating portion 7a is prevented from contacting the center 3 and the inner wall surface 2a of the lateral hole 2 due to the presence of the bulging portion 7b. Therefore, it becomes possible to compact the lining concrete more favorably.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings illustrate one embodiment of the present invention and are described below.

In this embodiment, a lateral hole 2 formed by excavating a ground 1
Center 3 supported by portal structure 4 on inner wall surface 2a
Is placed with an appropriate gap therebetween, and lining concrete 5 is cast in the gap between the inner wall surface 2a of the lateral hole 2 and the centre 3, and the laid concrete 5 is compacted by the vibrator 7. To form a tunnel.

Hereinafter, this embodiment will be specifically described.

Regarding the center 3 Centr 3 is shown in FIG.
As shown in FIG. 1, a steel plate having a predetermined width is connected via a hinge (not shown) to form an arch shape. The center 3 is supported by a portal structure 4 described later, and an electric jack 11 is provided. 4 so as to be contractible in the direction a in FIG. 4, and furthermore, the sentry 3 can be moved in the lateral direction and the longitudinal direction of the sentry 3 with respect to the portal type structure 4 by appropriate means not shown. It is configured.

A window hole 3 with a closing plate for leading out the lining concrete 5 is provided at an appropriate position on the side of the center 3 and at the top.
a is provided.

Regarding the portal structure 4. As shown in FIG. 4, the portal type structure 4 is configured such that it can be moved by a wheel 4a on a rail 10 previously laid in the lateral hole 2.

Regarding the moving body 6. The moving body 6 is shown in FIG.
As shown in FIGS. 5, 6, and 7, two H steels are slid so that the upper H steel 6a can freely slide with respect to the lower H steel 6b via the rotating body 13 and an appropriate drive source 14. The lower H steel 6b is fixed to one side of the upper part of the center 3, and the upper H steel 6a is positioned at the top of the center 3 or outside the upper part of the center 3. It is configured.

Incidentally, a plurality of moving bodies 6 may be provided, for example, they may be appropriately disposed so as to cover the outer surface of the center 3.

Regarding the vibrator 7. As shown in FIG. 10, the vibrator 7 is provided with a vibrating portion 7a vibrating at a high frequency at the tip of a rod-shaped main body, and a bulging portion 7b having a diameter larger than the vibrating portion 7a near the vibrating portion 7a. Is provided.

Each of the vibrators 7 has a cord 8
The cord body 8 is wound around a winding device 9 provided on the lower H steel 6b via the upper H steel 6a. Therefore, the vibrator 7 has the upper H steel 6
It will be hung up and down freely from the right place (see FIG. 5). The raising and lowering of the vibrator 7 is performed while visually checking the situation of the lining concrete.

A tunnel is formed using the above members as follows.

First, after excavating the ground 1 with an excavator to form a lateral hole 2, the portal type structure 4 is moved to an appropriate position, and the center 3 is disposed at a predetermined position. Is slid to position the upper part of the center 3, the lining concrete 5 is poured from the window hole 3 a of the center 3 into the gap between the center 3 and the inner wall surface 2 a of the excavated lateral hole 2, and the vibrator 7 is lowered. Then, the lining concrete 5 is compacted, the vibrator 7 is gradually raised, and the lining concrete 5 is further poured. 6a, the upper H steel 6a is returned and slid, and the lining concrete 5 is drawn out from the window 3a at the top of the center 3 at the top of the center 3, and the gap between the inner wall surface 2a of the horizontal hole 2 and the center 3 is formed. To pouring the lining concrete 5 in hand (see FIGS. 8 and 9).

After the lining concrete 5 has hardened, the sentry 3 is contracted inward, the sentry 3 is moved forward together with the portal structure 4, and the same operation is repeated to form a tunnel.

Therefore, according to the present embodiment, the lining concrete is compacted manually by an operator, and the lead-out window 3a is sequentially raised upward to lead the vibrator 7 as compared with the conventional method. It is not necessary to change to the above, and the compaction work of the lining concrete 5 can be performed automatically, so that the workability is extremely improved and the construction period can be shortened as much as possible.

Further, since the vibrator 7 having the bulging portion 7b which is larger in diameter than the bulging portion 7a is provided in the vicinity of the vibrating portion 7a, the vibrating portion 7a is formed by the presence of the bulging portion 7b. Since the contact with the inner wall 2a of the center 3 and the lateral hole 2 is prevented, it is possible to compact the lining concrete 5 more favorably, and if the bulging portion 7b is filled with a somewhat heavy member, Since the bulging portion plays a role of a weight, the vibrator 7 is favorably lowered.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a conventional method and a present embodiment.

FIG. 2 is an explanatory diagram of a conventional method.

FIG. 3 is an explanatory diagram of a conventional method.

FIG. 4 is an explanatory perspective view of the present embodiment.

FIG. 5 is an explanatory side view of the present embodiment.

FIG. 6 is an explanatory diagram of a moving object according to the embodiment.

FIG. 7 is an explanatory diagram of a moving object according to the embodiment.

FIG. 8 is an explanatory side view of the present embodiment.

FIG. 9 is an explanatory side view of the present embodiment.

FIG. 10 illustrates a vibrator according to the present embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ground 2 Side hole 2a Inner wall surface 3 Centru 4 Portal structure 5 Lining concrete 6 Moving body 6a Rod 6b Rod 7 Vibrator 7a Vibration part 7b Swelling part 8 String body

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E21D 11/10

Claims (3)

(57) [Claims] After excavating the ground and forming a horizontal hole, a portal structure having a centur disposed therein is located in the horizontal hole, and lining concrete is placed between an inner wall surface of the horizontal hole and the centur. Cast and
After curing of the lining concrete, to advance the該門type structure, in tunnel formation method for forming a tunnel Repeat this, provided Sentoru lengthwise movable rod-like moving body of the outer surface top of Sentoru, this The moving object is
A lower rod sticking to one upper side and protruding outward;
Upper rod shape slidably connected to the lower rod upper body
In addition, a vibrator that compacts lining concrete is provided at the appropriate place of this moving body so as to be able to move up and down,
This vibrator has a configuration in which a bulging portion having a diameter larger than that of the vibrating portion that prevents the vibrating portion from contacting the inner wall surface of the centrifuge or the horizontal hole is provided. Laying concrete in between, moving the moving body to a suitable position on the outer surface of the centre, further lowering the vibrator to an appropriate position, and compacting the lining concrete by vibration of the vibrator. How to form a tunnel. 2. A Sentoru arch shapes used during tunnel formation, the outer surface top mobile rod-shaped are provided to move Sentoru length direction, the mobile
Is the lower side, which is fixed to one upper side of the center and protrudes outward
Slidably connected to the lower rod body and the lower rod body
Further, a string body which rises and falls with respect to the moving body is provided at an appropriate position of the moving body, and a vibrator for compacting the lining concrete is provided on the string body. A vibrator having a configuration in which a bulging portion having a diameter larger than that of the vibrating portion for preventing the vibrating portion from contacting the inner wall surface of the centre or the horizontal hole is provided. 3. A tunnel for forming a tunnel according to claim 2, wherein the cords are provided at appropriate positions on both sides of the moving body.
Sentoru for tunneling, characterized in that that.