JP3092907B2 - Tunnel lining method and tunnel lining form device - 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 lining method for performing primary lining of an inner wall surface of a tunnel excavation and a formwork apparatus for the tunnel lining.

[0002]

2. Description of the Related Art As is well known, when excavating a tunnel, primary lining is often performed together with the excavation in order to prevent the excavated inner wall surface of the tunnel from falling off or collapsing.
Conventionally, a concrete spraying method is known as an example of the primary lining. In this concrete spraying method, mortar or concrete is transported through a pipeline by compressed air and sprayed from the nozzle at the tip to the inner wall of the tunnel at high speed, and is attached to the cement and aggregate by adding water and mixing. There are a construction method and a dry construction method in which water is added and sprayed with a nozzle using a dry kneading method.

[0003]

However, in the primary lining by the above-mentioned concrete spraying method, since the concrete is sprayed toward the inner wall of the tunnel with compressed air, dust is generated and rebound of the lining material (concrete or the like) occurs. As a result, the working environment inside the tunnel pit deteriorates, and not only is the pit work difficult, but also there is a problem that the material is lost due to the rebound of the lining material, resulting in uneconomical construction. In addition, in the concrete spraying operation, since the nozzle work is kept at a fixed distance from the spraying surface, it is difficult to perform the lining work and the face work such as excavation work in parallel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an economical lining with little material loss under a working environment free of dust generation and buckling of a lining material. It is an object of the present invention to provide a tunnel lining method and a tunnel lining form device which can be performed in parallel with the above.

[0005]

In order to achieve the above object, a tunnel lining method according to a first aspect of the present invention is to provide a tunnel lining method in which a long air tube is provided inside a tunnel inner wall in a circumferential direction of the tunnel. When arranging along the circumferential direction, the air tube is inserted into a bag provided with a bracket, and an arch member is arranged along the inner wall of the tunnel, and then the bracket is fixed to the arch member. By fixing the air tube together with the bag body to the arch member, a mold is formed by filling air into the air tube, and a mold by the air tube and the inner wall surface of the tunnel. a curable lining material filled between, then, after hardening of the lining material, remove the air in the air tube, it is deflated the air tube, before The bag is, the radial direction of the bag body of the tunnel
It is provided with a partition wall divided in two directions, and in the bag body,
Two air tubes sandwich the partition wall
It is characterized by being inserted in two stages in the radial direction .

[0006] Examples of the lining material include curable materials such as concrete, mortar, and cement milk. The air tube has a structure in which both ends of a flexible cylindrical body made of, for example, synthetic resin are sealed, and the air tube has at least one valve for injecting or discharging air. Are provided. Further, the bag body has a partition wall formed therein,
Tubular tubes made of flexible synthetic resin
So both ends are closed by being crushed,
Brackets are provided on the inner peripheral side of the bag at predetermined intervals.
And the bracket is attached to the upper surface of the steel plate of the arch member.
And insert the pin into the bracket from the bottom side and fix it.
As a result, the bag body into which the air tube has been inserted is
Fixed to the arm member. Further, the air tube by a plurality juxtaposed in the axial direction of the tunnel, it is desirable to ensure the width of the mold, in this case, these air
It is desirable to lay a sheet member on the upper surface of the tube facing the inner wall surface of the tunnel. As described above, if a plurality of air tubes are arranged in the axial direction of the tunnel, the lining length can be easily adjusted by adjusting the number of the air tubes arranged in parallel.

[0007] Further, since the upper surface of the air tubes arranged in two stages facing the inner wall surface of the tunnel is formed into a wavy shape, the primary lining provided between the air tubes and the inner wall surface of the tunnel is formed. The concrete surface is also uneven. Therefore, when the secondary lining concrete is applied to the primary lining concrete, the joining surfaces of these lining concretes are in a state where they are hardly interlocked with each other, and the joining surface becomes very strong. In addition, by laying a sheet member on the upper surface of the plurality of air tubes facing the inner wall surface of the tunnel, it is possible to prevent concrete from leaking from between the air tubes at the time of placing concrete.

[0008]

In the tunnel lining method of the first aspect,
When arranging a long air tube in the circumferential direction of the tunnel along the circumferential direction of the tunnel, a bracket was provided and a partition wall was provided for dividing the air tube into two in the radial direction of the tunnel.
In the bag, place two air tubes with this partition wall in between.
After inserting the arch tube along the inner wall of the tunnel in two steps in the radial direction of the tunnel, and fixing the bracket to the arch member, the air tube is connected to the bag body. After fixing to the arch member, a mold is formed by sealing air in an air tube, and a moldable lining material formed between the mold formed by the air tube and the inner wall surface of the tunnel. Because it is filled, unlike conventional lining by spraying concrete, there is no generation of dust or rebound of lining material,
Also, there is almost no material loss. Further, after the lining material is cured, the air in the air tube is evacuated, and the air tube is contracted, whereby the mold can be easily removed from the mold. Furthermore, since the space below the form by the air tube can pass freely, the face work such as excavation work can be performed in parallel with the lining work.

According to a second aspect of the present invention, there is provided a formwork device for tunnel lining, wherein the arch member is arranged in an arch shape along the inner wall of the tunnel, and the arch member is arranged on the outer peripheral surface of the arch member along the circumferential direction. The inside of the tunnel inner wall is filled with air to extend the length of the tunnel forming the formwork in the circumferential direction.
A long air tube, a bag body into which the air tube is inserted, and a bracket provided on the bag body for fixing the bag body to the arch member.
Is a partition wall that divides the bag body into two in the radial direction of the tunnel.
The bag body has two pieces sandwiching the partition wall.
Air tubes in two stages in the radial direction of the tunnel
It is characterized by being inserted in.

[0011] The arch member is constituted, for example, by arranging a steel material curved along the inner wall of the tunnel in the axial direction of the plurality of tunnels. In addition, an outflow prevention member is provided at an end of the arch member on the side of the tunnel face to prevent the cast concrete from flowing out from the end. Furthermore, a casting portion for casting concrete between the air tube and the inner wall surface of the tunnel is provided at a predetermined position of the arch member. The air tube has a structure in which both ends of a flexible tubular body made of, for example, synthetic resin are hermetically closed, as in the case of the first aspect.
It is inserted into a bag , and the air tube is provided with at least one valve for injecting or discharging air.

According to the second aspect of the present invention, an arch member is provided inside the inner wall surface of the tunnel, and a radial direction of the tunnel is provided outside the arch member.
This partition is sandwiched in a bag with a partition
After arranging the air tubes inserted in two stages in the radial direction of the tunnel along the circumferential direction of the bag together with the bag body , a mold is formed by filling air into the air tubes. , This air tube formwork,
Fill a hardenable lining material such as concrete between the tunnel inner wall surface, and then, after hardening the lining material,
By evacuating the air in the air tube, shrinking the air tube and removing the mold, the primary lining of the tunnel can be performed.

When lining is performed in this way, unlike the lining by the conventional spraying of concrete, there is no generation of dust and no rebound of the lining material, and there is almost no material loss. Further, after the lining material is cured, the air in the air tube is evacuated, and the air tube is contracted, whereby the mold can be easily removed from the mold.

According to a third aspect of the present invention, there is provided a formwork device for a tunnel lining according to the second aspect, wherein the air tube is inserted.
There are several juxtaposed in the axial direction of the tunnel, on the top surface facing the tunnel wall surface side of the bag is obtained by laying a sheet member.

The sheet member is preferably a flexible and waterproof material such as a rubber mat or a waterproof sheet with cloth. Then, the sheet member is laid so as to entirely cover the upper surface of the bag body into which the plurality of air tubes are inserted , facing the inner wall surface of the tunnel, and the end of the laid sheet member on the tip side of the tunnel. The part is fixed to the distal end of the arch member, while the proximal end of the seat member is attached to the proximal end of the arch member via a spring, whereby the seat member is attached to the air tube. Make sure they adhere.

According to the third aspect of the present invention, similarly to the second aspect, it is possible to perform the tunnel lining with no generation of dust, no rebound of the lining material, and almost no material loss. Needless to say, a plurality of bags into which the air tubes are inserted are arranged in parallel in the axial direction of the tunnel. Can be adjusted.

Further, since a plurality of bags into which the air tubes are inserted are arranged side by side in the axial direction of the tunnel, the upper surfaces of the air tubes facing the inner wall surface of the tunnel are formed into wavy irregularities. The primary lining concrete surface cast between the inner wall surface of the tunnel and the tunnel also has irregularities. Therefore, when the secondary lining concrete is applied to the primary lining concrete, the joining surfaces of these lining concretes are in a state where they are hardly interlocked with each other, and the joining surface becomes very strong. In addition, by laying a sheet member on the upper surface of the plurality of air tubes facing the inner wall surface of the tunnel, it is possible to prevent concrete from leaking between the air tubes at the time of placing concrete.

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 8 show an example of a formwork apparatus for tunnel lining according to the present invention. First, as shown in FIGS. 1 to 4, a tunnel lining form device includes an arch member 1 arranged in an arch shape along a tunnel inner wall and an outer peripheral surface side of the arch member 1 along a circumferential direction. A plurality of air tubes 2... That form a form inside the tunnel inner wall by enclosing air therein, and a pair of right and left traveling carts 3, 3 supporting the arch member 1. Configuration.

The arch member 1 is provided with three H-shaped steel members 4 curved along the inner wall of the tunnel at predetermined intervals in the axial direction of the tunnel. The steel sheet 5 which is curved along the inner wall of the tunnel is provided on the surface facing. Also,
As shown in FIG. 6, an outflow prevention member 6 is provided at an end of the arch member 1 on the tunnel face side to prevent the concrete from flowing out from the end.

The outflow prevention member 6 is provided on the arch member 1.
And a slide pipe 6b axially slidably inserted into the cylindrical body 6a, the slide pipe 6b being attached to the end of the cylindrical body 6a. The screw 6c is rotatably attached to the screw 6c, and can be slid toward the inner wall surface of the tunnel by rotating the screw 6c. At the end of the arch member 1, a plurality of air tubes 7 that are long in the circumferential direction of the tunnel are provided along the slide pipe 6b, and are fixed to the slide pipe 6b by a fixing band 7a. . The air tube 7 is provided with at least one valve (not shown) for injecting or discharging air. The air tubes 7 are continuously arranged by bonding their contact surfaces. Of these air tubes 7, the air tube 7 located on the base end side of the slide pipe 6b is , Is adhered to the sheet member 10.
Further, of the fixed bands 7a, the fixed band 7a located on the tip side of the slide pipe 6b is fixed to the slide pipe 6b, and the remaining fixed bands 7a are fixed.
Is externally slidably inserted in the slide pipe 6b in the axial direction. The air tubes 7 are pulled upward by the air tube 7 at the distal end by extending the slide pipe 6b and move upward, while the air tubes 7 at the distal end are contracted by contracting the slide pipe 6b. , And moves downward together with the fixed bands 7a.

Then, the outflow prevention member 6 having such a configuration is provided.
Then, slide the slide pipe 6b in a state where the air is evacuated, and abut its tip against the inner wall surface of the tunnel.
By injecting and sealing air into the air tubes 7 to bring the air tubes 7 into close contact with each other, the gap between the end of the arch member 1 on the tunnel face side and the inner wall surface of the tunnel is closed. This prevents the concrete from flowing out from the end of the arch member 1.

The air tube 2 disposed along the circumferential direction on the outer peripheral surface side of the arch member 1 has a structure in which both ends of a flexible tubular body made of synthetic resin are sealed. The air tube 2 is provided with at least one valve (not shown) for injecting or discharging air. The air tubes 2 are arranged in parallel in the axial direction of the tunnel, and are arranged in two stages in the radial direction of the tunnel. When the air tubes 2 are arranged in this manner, as shown in FIG. 5, the upper and lower air tubes 2, 2 are inserted into a bag 8 having a partition wall 8a formed therein. Is arranged in the axial direction of many tunnels. The bag 8 has a tubular shape formed of a synthetic resin having flexibility, and both ends thereof are closed by being crushed.

Brackets 8b are provided on the inner peripheral side of the bag body 8 at predetermined intervals. As shown in FIG. 6, the brackets 8b are attached to the steel plate 5 of the arch member 1 from above. Insert the pin 9 from the bottom side into the bracket 8
The bag body 8 is fixed to the outer peripheral side of the arch member 1 by inserting and fixing the bag body b. In addition, of the said arch member 1,
The two one-stage air tubes 2 on the left end in FIG.
2 is disposed as it is without being inserted into the bag 8, and is fixed to the arch member 1 via brackets 8b, 8b provided directly on the air tubes 2, 2.

As shown in FIG. 6, a seat member 10 is disposed on the upper surface of the air tubes 2 arranged on the outer peripheral side of the arch member 1 facing the inner wall surface of the tunnel. The sheet member 10 is flexible and waterproof, such as a rubber mat or a waterproof sheet containing cloth. The upper surface of the plurality of air tubes 2.. It is laid to cover.

The end (left end) of the sheet member 10 on the distal end side of the tunnel is fixed to the distal end surface of the arch member 1 by winding the air tube 2 on the distal end side of the arch member 1. On the other hand, one end of a wire 11 is attached to the end (right end) on the tunnel base end side of the sheet member 10, and the other end of the wire 11 is provided at the base end of the arch member 1. After being hung on a pulley 12, it is wound around a wire reel 13. The wire reel 13 is driven by a spring built in the wire reel 13.
The sheet member 10 is pulled obliquely downward and rightward in FIG. 2 by the wire 11 so as to be in close contact with the upper surface of the air tubes 2. The plurality of wires 11 are attached at predetermined intervals along the edge of the right end of the sheet member 10.

FIG. 6 shows a state in which air is injected and sealed into the air tubes 2 and 7 and the air tubes 2 and 7 are cast with concrete. Immediately before the air is injected, these are set in a state where the air is removed as shown in FIG.

Further, at three places of the arch member 1,
As shown in FIG. 2 and FIG. 3, casting portions 15 for casting concrete are provided at predetermined intervals between the air tube 2 and the inner wall surface of the tunnel. As shown in FIG. 7, the driving portion 15 includes an outer pipe 16 and an inner pipe 1 slidably inserted in the outer pipe 16 in the axial direction.
7 has a double-pipe structure. The outer pipe 1
6 are air tubes 2 and 2 which slidably penetrate the arch member 1 and are adjacent in the axial direction of the tunnel.
It is provided so as to slidably penetrate the space,
The cylinder device 18 attached to the arch member 1 is adapted to be moved up and down in FIG.
Further, an opening 16a that opens in the lateral direction is formed at the upper end of the outer pipe 16. On the other hand, the inner pipe 1
7 is a cylinder device 1 attached to the outer pipe 16
9, the inner pipe 17 is moved up and down.
7a, and an opening 17b is formed facing the inclined plate 17a.

In the casting section 15 having the above structure, the outer pipe 16 is moved upward by the cylinder device 18 so that the upper end thereof is located between the air tubes 2 and the inner wall surface of the tunnel. 19, the inner pipe 17 is moved upward, and its opening 17b
Is adjusted to the opening 16a, and concrete is removed from the hose 20 connected to the inner pipe 17 through the inner pipe 17.
Through the opening 17b and the inner pipe 17
Is moved downward so that the opening 17b is closed by the outer pipe 16, so that the casting of concrete can be stopped. Immediately before the end of the casting, the outer pipe 1
6 is moved downward so that the upper end surface of the outer pipe 16 is positioned slightly flush with the upper surface of the air tubes 2. It can be densely cast.

Further, the arch member 1 is provided so as to be movable in the axial direction of the tunnel. That is, as shown in FIGS. 1 and 2, a pair of right and left traveling vehicles 3 is disposed behind the arch member 1, and a support arm 21 is provided at a front portion of each traveling vehicle 3. The end of the arch member 1 is attached and fixed through the intermediary of the arch member 1. A counterweight 22 is fixed to a rear portion of the traveling vehicle 3, thereby balancing the arch member 1.

The traveling vehicle 3 has a pair of front and rear moving rollers 23, 23. The traveling rollers 23, 23 roll on rails 24, and the traveling vehicles 3 Are movable back and forth by rolling the lower surface of the rail 24, and the movement of the traveling carriage 3 allows the arch member 1 to move in the axial direction of the tunnel. Has become. A cylinder device 26 is provided horizontally on the rail 24, and the traveling carriage 3 is moved along the rail 24 by the cylinder device 26. Further, outrigger jacks 27 are provided on the traveling vehicle 3 at positions where the traveling rollers 23 are sandwiched. Since there are a pair of moving rollers 23 in the front and rear, a total of four outrigger jacks 27 are mounted on one traveling vehicle 3.

The outrigger jacks 27 lift the traveling carriage 3 on rails 24 and
Is supported from the bottom of the tunnel while floating on the rails 24. By extending the cylinder device 26 with the traveling carriage 3 floating, the rails 24 are moved forward. . Therefore, by alternately performing the forward movement of the rail 24 and the forward movement of the traveling trolley 3, the traveling trolley 3 can move toward the tip end thereof along with the tunnel excavation. I can do it. Also, the arch part 1 is a traveling carriage 3
Can move in the axial direction of the tunnel along the rail 24, so that the air tubes 2 are arranged on the outer peripheral side of the arch member 1 and the air is filled before and after the air is sealed in the air tubes 7. The position of the tubes 7 in the axial direction of the tunnel can be finely adjusted.

Further, the arch member 1 is provided so as to be movable in the vertical and horizontal directions of the tunnel. That is, as shown in FIG. 1, the traveling carriage 3 is provided with a pair of front and rear main support jacks 30 and 31 vertically. On the other hand, a frame 33 is disposed on the support arm 21 that supports the arch member 1 in a state where the frame 33 is free up, down, left, and right with respect to the traveling vehicle 3. Are linked.
The counterweight 22 is attached to the frame 33. At the lower end of the arch member 1, as shown in FIG. 7, a frame 34 is provided vertically, and the frame 34 is provided on a frame 35 provided vertically on the traveling vehicle 3. The main support jack 30 is connected.

The arch member 1 can be moved up and down by expanding and contracting the main support jacks 30 and 31, whereby the air tubes 2 provided on the outer peripheral side of the arch member 1. Can be adjusted in the vertical direction. Further, among the three H-shaped steel members 4 constituting the arch member 1, at the lower end portions of the two front H-shaped steel members 4, 4, as shown in FIGS. A jack 36 is mounted vertically, and the sub-supporting jacks 36 support the arch member 1 from the bottom of the tunnel, and extend and contract the sub-supporting jacks 36 to finely adjust the vertical position of the arch member 1. That is, the vertical position of the air tubes 2 can be finely adjusted.

The traveling carriage 3 has a traversing platform 37
Are provided movably in the left-right direction in FIG.
The horizontal feed table 37 is moved left and right by turning a screw 38 provided on the horizontal feed table 37. Further, the lower end of the frame 35 is fixed to the horizontal feed base 37. Therefore, by moving the horizontal feed base 37 left and right, the arch member 1 is moved right and left in FIG. (In a direction perpendicular to the plane of the drawing), whereby the position of the air tubes 2 in the left-right direction of the tunnel can be finely adjusted.

As shown in FIG. 8, air tubes 40 for preventing concrete from leaking from both ends of the arch member 1 are vertically attached to both ends of the arch member 1 in a state of being in close contact with the air tube 2. With three stages,
Pressing member 4 for holding these air tubes 40, 40
1 is attached. In addition, the arch member 1 includes:
As shown in FIGS. 2, 3 and 6, reaction force jacks 42 are provided at predetermined intervals in the circumferential direction, so that lateral pressure of concrete cast by the reaction force jacks 42 can be suppressed. Has become.

Next, a method of lining a tunnel by using the tunnel lining form device having the above-described configuration will be described. In this description, as shown in FIG. 1, a method of performing the next lining in front of the lining concrete C1 previously laid at a certain position in the axial direction of the tunnel will be described as an example.

First, the carriages 3, 3 are moved forward in the axial direction of the tunnel by the cylinder devices 26, 26 to position the arch member 1 in the tunnel axis direction.
The arch member 1 is raised to a predetermined position by 0, 31 and the vertical position of the arch member 1 is determined, and the horizontal feed base 37 is slightly moved left and right, so that the arch member 1 is moved in the left and right direction. When the positioning is completed and the positioning is completed, the sub support jack 36
By supporting the arch member 1 from the bottom of the tunnel,
Further, the outrigger jack 27 is extended to the bottom of the tunnel, and the traveling vehicle 3 is fixed.

Next, air is injected into the air tubes 2. Then, the air tubes 2 are gradually expanded from the state shown in FIG. 7, and as shown in FIG. 6, these air tubes 2 are in close contact with the sheet member 10, and the rear air tubes 2 are It comes into close contact with the lower surface and the front end surface of the convex part t1 at the front part of the lining concrete C1 that was previously lining. Further, by extending the slide pipe 6b of the outflow prevention member 6 to abut against the inner wall of the tunnel, injecting air into the air tubes 7 and sealing the air tubes 7, the air tubes 7 are in close contact with each other. The space A where concrete is to be cast is formed between the air tube 2 and the inner wall surface of the tunnel by closely contacting the air tube 2 on the side and the inner wall surface of the tunnel. The portion is closed by the air tubes 7 and the rear end is closed by the convex portion t1, so that concrete leakage from both ends of the space A is prevented. The space A is formed so as to extend in the circumferential direction along the inner wall surface of the tunnel as shown in FIGS. 2 and 3, and both ends of the space A in the circumferential direction are shown in FIG. Thus, concrete is prevented from being blocked by the air tubes 40. After the air is sealed in the air tubes 2, 7, and 40, if necessary, the main support jacks 30, 31 and the sub support jacks 3 are used.
6, fine adjustment in the vertical direction of the air tubes 2, etc. is performed, and fine adjustment in the left-right direction is performed by the horizontal feeder 37.

When the space A is formed in this manner, concrete is densely filled in the space A by casting concrete from the casting portion 15 into the space A as shown in FIG. By doing so, the next lining concrete C2 is constructed in front of the lining concrete C1 previously lining. The inner peripheral surface of the primary lining concrete thus constructed is corrugated due to the plurality of air tubes 2 arranged in the axial direction, so that the secondary lining is formed on the primary lining concrete. When the concrete is applied, the joint surfaces of these lining concretes are in a state where they are hardly interdigitated, and the joint surfaces can be made very strong.

The thickness of the lining (concrete casting thickness) can be freely adjusted by adjusting the number of air tubes arranged in the air tubes 2. In particular, the arch member 1
The air tubes 2, 2 on the front end side of the first stage are formed in one stage, and the subsequent air tubes 2,... Are arranged in two stages, so that the front end of the constructed primary lining concrete C2 has a convex portion t2 in the circumferential direction. , The primary lining concrete C2 can be formed into a shape that is advantageous in structural mechanics. Further, by adjusting the number of the air tubes 2 arranged in the axial direction of the tunnel, the lining length can be easily adjusted, and the lining thickness can be easily adjusted by adjusting the number of air tubes. (Concrete casting thickness) can be adjusted freely. Further, by laying the sheet member 10 on the upper surface of the air tubes 2 facing the inner wall surface of the tunnel,
When placing concrete, use air tubes 2, 2
Leakage of concrete from between can be prevented.

As described above, the lining concrete C2
After the concrete is hardened, after the concrete is hardened, air is evacuated from the air tubes 2, 7, 40, and the air tubes 2, 7, 40 are contracted, so that these are released from the primary lining concrete C2. Then, the main support jacks 30 and 31 and the sub support jack 36
Are reduced to lower the arch member 1.

Then, in order to perform the next lining in front of the lining concrete C2, the outrigger jack 27 ...
And the traveling carriage 3 is moved by the cylinder device 26 to the rail 2 by the lining length of the lining concrete C2.
4 is moved forward, and then the next lining concrete is constructed in the same manner as above.

Further, when the next lining concrete is to be constructed, the traveling carriage 3 is located at the front end of the rail 24 and cannot travel any further.
After extending the outrigger jack 27 to float the traveling cart 3 on the rail 24, the cylinder device 26
, The rail 24 is moved forward. As a result, the traveling carriage 3 can travel forward, so that the outrigger jacks 27 are contracted, and the traveling carriage 3 is moved by the cylinder device 26 to the rails 24 by the length of the previous lining concrete. Move the top forward, and then construct the next lining concrete in the same manner as above. By repeating this process, the traveling trolley 3 and the rail 24 are alternately advanced, and the tunnel lining is performed one after another in association with the tunnel excavation.

In the above example, at a certain position in the axial direction of the tunnel, the lining concrete C
The method of performing the next lining in front of 1 has been described as an example. At the base end of the tunnel, first, a tunnel is excavated to a predetermined length, and then a wedge stop wall is formed. While laying the rails 24, 24,
The carriages 3, 3 are installed on the rails 24, 24, and the arch member 1 is attached and fixed to the carriages 3, 3. The air tube 2 and the sheet member 10 may be provided in advance on the outer peripheral side of the arch member 1,
After attaching and fixing the arch member 1 to the traveling carts 3 and 3,
An air tube 2... And a sheet member 10 may be provided on the outer peripheral side of the arch member 1. And air tube 2
……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………. Concrete leakage from the end can be prevented.

According to the tunnel lining method described above, the air tubes 2, 7, and
A mold is formed by filling air into the mold 40, and the molds 2, 7, 40 constituted by these air tubes,
Since concrete is poured into the space A between the inner wall of the tunnel and the lining by the conventional spraying of concrete, it is economical with less material loss under the working environment where there is no generation of dust and the lining material rebounds. Lining can be performed. Further, after the concrete is hardened, the air in the air tubes 2, 7, and 40 is evacuated, and the air tubes are contracted, whereby the mold can be easily removed. Furthermore, since the space below the form by the air tubes 2, 7, and 40 can pass freely, the face work such as the excavation work can be performed in parallel with the lining work.

In the above example, the air tubes 2 are arranged in two stages on the outer peripheral side of the arch member 1. However, three or more air tubes may be arranged, and the number of stages may be changed depending on the position. Good. In this way, the lining thickness can be further freely changed and adjusted. Further, in the above example, the traveling carriage 3 and the rail 24 are configured to alternately move forward, but the rail 24 may be added forward along with excavation. Further, in the above example, the present invention has been described by taking the primary lining as an example, but it goes without saying that the present invention can be applied to the secondary lining.

[0053]

As described above, according to the first aspect of the present invention,
According to the tunnel lining method, a bracket is provided when arranging a long air tube in the circumferential direction of the tunnel along the circumferential direction of the tunnel, and the air tube is provided in the radial direction of the tunnel.
Place this partition in a bag with a partition
Two air tubes in two stages in the radial direction of the tunnel
After inserting the arch member along the inner wall of the tunnel and fixing the bracket to the arch member, the air tube is fixed to the arch member together with the bag body, A mold is formed by filling air into the air tube, and a curable lining material is filled between the mold by the air tube and the inner wall surface of the tunnel. Unlike the lining by the method, the lining can be performed economically with less material loss under a working environment in which no dust is generated and the lining material is not rebounded. In addition, after the lining material is cured, the air in the air tube is evacuated to shrink the air tube, so that the mold can be easily removed. Furthermore, since the space below the form by the air tube can pass freely, the face work such as excavation work can be performed in parallel with the lining work.

According to a second aspect of the present invention, there is provided a tunnel lining form device, wherein the arch member is provided in an arch shape along the inner wall of the tunnel, and the arch member is provided along the outer peripheral surface of the arch member along the circumferential direction. An air tube inserted into a bag forming a mold inside the inner wall of the tunnel by enclosing air into the bag .
And a partition wall for dividing the bag into two parts,
Two air tubes sandwich the partition wall and the diameter of the tunnel
Since it is inserted so as to be two steps in the direction, the mold by the air tube inserted in this bag body, between the inner wall surface of the tunnel is filled with a hardening lining material such as concrete, and then After the curing of the lining material, the air in the air tube is evacuated, and the air tube is shrunk and released from the mold, so that the working material is free from dust and the lining material is not rebounded. Economical lining with little loss can be performed, and demolding can be easily performed.

[0055] tunnel lining for formwork according to claim 3, in claim 2, and a plurality juxtaposed said bag <br/> the air tube is inserted in the axial direction of the tunnel, these air Chu
Since a sheet member is laid on the upper surface of the bag body into which the airbag is inserted , facing the inner wall surface side of the tunnel, in addition to the effect of claim 2, by adjusting the number of juxtaposed air tubes, There is an advantage that the length can be easily adjusted.

[0056] Further, since the plurality juxtaposed bag the air tube is inserted in the axial direction of the tunnel, covering primary that is Da設between these air tubes inserted bag and tunnel wall Corrugated irregularities are formed on the inner peripheral surface of the concrete. Therefore, the joining surface of the primary lining concrete and the secondary lining concrete is in a state where they are hardly interdigitated, and the joining surface can be made very strong. Further, a plurality of error
Since the sheet member is laid on the upper surface facing the inner wall surface side of the tunnel of the bag body into which the air tube is inserted, the bag into which the air tube is inserted at the time of casting concrete.
Concrete leakage from between the bodies can be prevented.

[0057]

[0058]

[0059]

[Brief description of the drawings]

FIG. 1 shows an example of a tunnel lining form device of the present invention, and is a side view of the tunnel lining form device.

FIG. 2 is a view taken in the direction of arrows AA in FIG.

FIG. 3 is a view taken along line BB in FIG. 1;

FIG. 4 is a view taken along line CC in FIG. 2;

FIG. 5 is an enlarged perspective view showing a main part of an air tube constituting the formwork device for tunnel lining according to the present invention.

FIG. 6 is a cross-sectional view of a main part, showing an example of a formwork apparatus for tunnel lining according to the present invention, in which an air tube filled with air is provided.

FIG. 7 is a cross-sectional view of a main part showing a portion where an air tube before air is sealed is provided.

FIG. 8 is an enlarged view of an X circle portion in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arch member 2 Air tube 3 Traveling trolley 10 Seat member 24 Rail 30, 31 Main support jack 36 Sub support jack 37 Side feed stand

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshitaka Kuwahara 1-20-10 Toranomon, Minato-ku, Tokyo Nishimatsu Construction Co., Ltd. (72) Inventor Toshiyuki Ichijo 1-20-10 Toranomon, Minato-ku, Tokyo Nishimatsu Within Construction Co., Ltd. (72) Inventor Tsutomu Kitagawa 14th, 144 Masamasa-cho, Motosu-gun, Gifu Prefecture Within Gifu Kogyo Co., Ltd. 72) Inventor, Shinji Masada, 14, 144, Masamasa-cho, Motosu-gun, Gifu Prefecture Inside Gifu Kogyo Co., Ltd. Hei 2-96097 (JP, A) JP-A-58-26197 (JP, A) JP 6-33037 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) E21D 11 / Ten

Claims (3)

(57) [Claims] 1. The inside of a tunnel inner wall , around the tunnel
When arranging an air tube elongated in the direction along the circumferential direction of the tunnel, the air tube was inserted into a bag provided with a bracket, and an arch member was arranged along the inner wall of the tunnel. Thereafter, by fixing the bracket to the arch member, after fixing the air tube to the arch member together with the bag body, form a mold by sealing the air in the air tube,
Filling a curable lining material between the mold with the air tube and the inner wall surface of the tunnel, and then, after curing the lining material, bleed air from the air tube to remove the air tube. it is deflated, the bag is divided into two parts the bag body in the radial direction of the tunnel
A partition wall is provided, and the partition wall is sandwiched in the bag body.
Two air tubes in two stages in the radial direction of the tunnel
A tunnel lining method, wherein the tunnel lining is inserted . 2. An arch member disposed in an arch shape along an inner wall of a tunnel, and an arch member disposed in an outer peripheral surface side of the arch member along a circumferential direction, and by enclosing air therein, the inner wall of the tunnel member is formed. Inside the tunnel that forms the formwork inside
An air tube elongated in the direction, a bag body into which the air tube is inserted, and a bracket provided on the bag body for fixing the bag body to the arch member. Divides the bag body into two in the radial direction of the tunnel
A partition wall is provided, and the partition wall is sandwiched in the bag body.
Two air tubes in two stages in the radial direction of the tunnel
A formwork device for tunnel lining, wherein the formwork device is inserted so as to form a tunnel. 3. The tunnel lining formwork device according to claim 2, wherein a plurality of bags into which the air tubes are inserted are arranged in the axial direction of the tunnel, and the bags face the inner wall surface side of the tunnel. A formwork device for tunnel lining, wherein a sheet member is laid on an upper surface.