JP3158352B2 - How to install a tarpaulin in the 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 method for mounting a waterproof sheet on the inner surface of a tunnel during construction of the tunnel.

[0002]

2. Description of the Related Art In the construction of a tunnel, it is common to attach a waterproof sheet to the inner surface of the tunnel. Conventionally, a worker works on a concrete platform from a scaffold or a sheet sticking work truck installed in the tunnel. A needle or the like was driven into the inside of the tunnel from above the waterproof sheet, and the waterproof sheet was attached to the tunnel.

[0003]

[SUMMARY OF THE INVENTION] In the above-described method requires a lot of operator work time is not it <br/> only long Kukakaru, mounting work on the ceiling of the tarpaulin tunnel Was very difficult because the worker had to do it with the worker facing up.

[0004] In addition, the prior art a large number of narrow a waterproof sheet,
Since they were joined by heat welding or the like, the number of joints was inevitably increased, and there was a high possibility that cracks would occur at the welded spots, and that water-tightness would be lost due to unwelding.

Further, in order to solve the above-mentioned disadvantages,
The waterproofing sheet is pressed against the inner surface of the tunnel by using the pressing force of the raw concrete when the secondary lining concrete is poured into the tunnel, and the installation of the waterproofing sheet and the placement of the secondary lining concrete are performed almost simultaneously. There are also known ways to do this.

However, in this method, since the secondary lining concrete is cast without completely fixing the waterproof sheet to the tunnel, the waterproof sheet is not uniformly attached to the inner surface of the tunnel, and a part of the waterproof sheet is overlapped. Alternatively, there is a possibility that concrete may be cast in a state where the waterproof sheet is broken due to a local tensile force acting.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and a waterproof sheet is uniformly and easily mounted on the inner surface of a tunnel in a short time without human power. It is an object of the present invention to provide a method for mounting a waterproof sheet in a tunnel, in which the secondary lining concrete can be easily poured thereafter.

[0008]

According to the present invention, the above-mentioned problem is solved as follows. (1) After a support member having a surface fastener is fixed to the inner surface of the tunnel, the vehicle can travel in the tunnel, and the outer shape is smaller than the inner shape of the tunnel and substantially similar to the inner shape of the tunnel. A waterproof sheet having an engaging layer capable of engaging with the hook-and-loop fastener is provided on an outer surface of the work cart, and one end of an air supply source is provided between the work cart and the waterproof sheet.
And open to the inside of the tunnel at the surface
Pressing means consisting of an air pipe provided with an injection hole to be opened
Air is supplied to the air pipe, and the air is injected from the injection hole.
The waterproof sheet is tunneled by the pressure of the blasted air.
The waterproof sheet is mounted on the inner surface of the tunnel by being raised and pressed toward the inner surface of the tunnel and engaging the anchoring layer on the outer surface of the waterproof sheet with the support member.

(2) In the above item (1), a large number of injection holes are provided in the air pipe in the length direction of the tunnel, and the injection amount of air from each injection hole is increased toward the entrance of the tunnel. Decrease toward the opposite side.

(3) A hook-and-loop fastener on the inner surface of the tunnel
After fixing the support member having the
And the outer shape is the same as the inner shape of the tunnel.
Outside of a small, approximately similar work cart
On the surface, a fastening layer capable of fastening to the hook-and-loop fastener is provided on the outer surface.
The work trolley and tarpaulin
Between the air supply and the workbench
Pressing means consisting of an air mat deployed on the outer surface of the car
Operating the air supply source to inflate the air mat.
By moving the waterproof sheet toward the inner surface of the tunnel,
To press the binding layer on the outer surface of the waterproof sheet.
By attaching the tarp to the support member, the tarp
On the inner surface of
And a storage section below the opening
Then, attach the air mat when not in use to the winding shaft
Wrap.

(4) A hook-and-loop fastener on the inner surface of the tunnel
After fixing the support member having the
And the outer shape is the same as the inner shape of the tunnel.
The top of a work cart that is small and almost similar in size
At the top, a fastening layer capable of fastening to the hook-and-loop fastener is provided on the outer surface.
Wrapped waterproof sheet from both sides to the center
Then, after placing it, unfold it toward both sides,
Pressing means provided between the dolly and the waterproof sheet
Serial and pressed toward the waterproof sheet on the inner surface of the tunnel, waterproof
Engaging the anchoring layer on the outer surface of the sheet with the support member;
The waterproof sheet on the inner surface of the tunnel.
You.

(5) Any one of the above items (1) to (4)
Then, after forming the primary lining concrete on the inner surface of the tunnel, the support member is fixed to the primary lining concrete.

(6) In any one of the above items (1) to ( 5 ), after the waterproof sheet is attached to the inner surface of the tunnel, concrete is poured between the inner surface of the waterproof sheet and the outer surface of the work cart. .

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment for performing construction work for the tunnel by the present invention will be described with reference to FIGS. In the following description, the front of the paper of FIG. 1 and the right of FIG. 3 are referred to as “front”, and the rear of the paper of FIG. 1 and the left of FIG. 3 are referred to as “rear”.

First, two rails in the front-rear direction are placed on the bottom surface (A) in the arched excavation hole (2) provided in the ground (1).
Lay (3) parallel to each other , and
On the (3), wheels (5) and (5) provided on the lower surface of the work cart (4) are placed.

[0016] Sentoru (4) includes a plurality of beams directed to the lateral direction and the longitudinal direction (6), the outer peripheral portion of the plurality of vertical posts (7) and Sentoru body configured by connecting (8), Drilling holes (2)
In small dimension from the inner surface, and are those fitted with the outer wall (9) of the arched forming a substantially similar shape, the front and rear Sentoru body (8) horizontal work table (10) (11) is provided, Centre (4)
Can move on the rail (3).

After moving the centre (4) to the place where the waterproof sheet (S) is to be mounted, the work table (10) (11) is used to move the center (4) to the inner surface of the excavation hole (2) or A number of support members (14) (14) (in which the surface fastener (13) is fixed to the surface of the disc-shaped main body (12)) are sprayed and hardened on the inner surface of the primary lining concrete (B) according to 2) are fixed by concrete needles 15 at predetermined intervals along the circumferential direction and length direction of the tunnel (see FIG. 2).

Next, for example, the inner side (centre (4) side) is made of a non-water-permeable synthetic resin sheet, and the outer side (the inner side of the tunnel)
Has a double structure in which a binding layer made of a non-woven fabric or the like that can engage with the hook-and-loop fastener is formed,
The overall length approximately equal wide tarpaulin (4) (S), previously, the left and right side portions wound in the central direction, a material obtained by so as to form spectacles-shaped in front view, as is Sentoru (4 ) (See the phantom line in FIG. 1).

Subsequently, a waterproof sheet placed on the top
(S) is developed obliquely downward along the outer wall (9).
(See a solid line in FIG. 1), an outer wall (9), covering the folded portion of the air pipe (16) which had previously been attached to the outside of the outer wall (9) and (16a) with a waterproof sheet (S), tarpaulin ( The front end of (S)
It is projected forward of the air pipe (16) (see FIG. 3).

The air pipe (16) has a base connected to an air supply source (not shown), through which high-pressure air flows. The base of the air pipe (16) is disposed inside the center (4). At the front end of the center 4, it is folded in the opposite direction, and the folded portion 16 a is supported substantially horizontally so as to face rearward outside the outer wall 9. A large number of injection holes (17) opening toward the inner surface of the tunnel are formed in the folded portion (16a) in a row in the front-rear direction.

Next, the front end of the preceding waterproof sheet (S '), which has already been mounted on the inner surface of the tunnel and has the secondary lining concrete formed on the inner surface, is heated at the rear end of the prevention sheet (S). After joining by welding etc., operate the air supply source,
Supply air into the air pipe (16). Then, the injection hole (1
The waterproof sheet (S) rises to the inner side of the tunnel due to the pressure of the air injected from 7) toward the primary lining concrete (B), and the non-woven fabric or the like formed on the back surface of the waterproof sheet (S). The waterproofing sheet (S) is brought into contact with the inner surface of the primary lining concrete (B) by pressing the surface layer on the surface fastener (13) of the support member (14) attached to the primary lining concrete (B). It is installed evenly.

At this time, it is preferable that the amount of air injected from each of the injection holes (17) is larger on the distal side (left side in FIG. 3) and smaller on the proximal side (right side in FIG. 3). In this case, the waterproof sheet (S) will be placed on the primary lining concrete from the rear end side.
(B), the waterproof sheet (S) can be more evenly attached.

The front end of the waterproof sheet (S) is connected to the air pipe (1).
6), the air pressure is not applied so much, and the front end of the waterproof sheet (S) is
Non-contact with the next lining concrete (B).

[0024] Then, either remove air pipe (16) from the outer wall (9), or the secondary lining between the accommodated in the outer wall (9), loaded tarpaulin and (S) and outer wall (9) Concrete is poured and hardened (not shown). Front end of waterproof sheet (S)
The rear end of the next waterproof sheet Ru coupled.

By repeating such operations sequentially, the installation of the waterproof sheet (S) and the placement of the secondary lining concrete (C) can be performed in a batch manner over the entire length of the tunnel.

As described above, the primary lining concrete
By attaching a support member (14) having a hook-and-loop fastener (13) to (B) and attaching the waterproof sheet (S) to the primary lining concrete (B) using the pressure of air, With a small number of people, easily and in a short time,
(S) can be uniformly mounted on the tunnel.

After the waterproof sheet (S) is completely fixed to the primary lining concrete (B), the secondary lining concrete
Since the casting of (C) is performed, the work of placing the secondary lining concrete (C) is easy, and the primary lining concrete is also used.
A series of operations from the formation of (B) to the placement of the secondary lining concrete (C) can be smoothly performed.

When the primary lining concrete (B) is not formed, the support member (14) is directly attached to the excavation hole (2), and the waterproof sheet (S) is attached in the same manner as described above. Good.

As shown in FIG. 5, the waterproof sheet (S)
At the time of installation work, the front end of the waterproof sheet (S) and the air pipe
In some cases, an arched air tube (18) or the like is inserted beforehand between the waterproof sheet (16) and the front end of the waterproof sheet (S) and the air pipe (16). With this configuration, the air injected from the air pipe (16) does not leak from the front of the waterproof sheet (S), and the waterproof sheet (S) can be efficiently attached to the tunnel.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

In this embodiment, the waterproof sheet (S) is attached to the outer wall.
(9) The air mat (19) is deployed on almost the entire surface of the outer wall (9) before being deployed on the upper surface. The top of the outer wall (9) has an opening
(20) is provided, and a storage part (21) is formed below the opening (19). Inside the storage unit (21), two winding shafts (22) and (22) facing in the front-rear direction are provided. Before starting the work, each winding shaft (22) (22) A pair of air mats (19) and (19) are wound around (see phantom lines in FIG. 6).

Each of the air mats (19) is released from the opening (20) onto the outer wall (9) when the winding around the winding shaft (22) is released and the left and right halves of the outer wall (9) are opened. The base end is connected to the other end of an air pipe (23) having one end connected to an air supply source (not shown).

Preferably, a non-woven fabric or the like (not shown) for preventing the inner surfaces of the air mat (19) from sticking to each other when the air is removed is preferably placed inside the air mat (19). .

To attach the waterproof sheet (S) to the tunnel, the support member (14) is fixed to the primary lining concrete (B) in the same manner as in the first embodiment, and then the air mat is mounted.
After deploying (19) on the outer wall (9) and further deploying the waterproof sheet (S) on the air mat (19), the air supply source is operated to inflate the air mat (19).

When the air mat (19) expands, the air mat (19)
(19) The waterproof sheet (S) placed on is pressed to the tunnel side, and the nonwoven fabric provided on the back surface of the waterproof sheet (S) contacts the surface fastener (13) of the support member (14). Thereby, the waterproof sheet (S) is attached to the tunnel (see FIG. 7). Thereafter, the secondary lining concrete (C) is cast.

Even in this case, the waterproof sheet (S) can be uniformly mounted on the inner surface of the tunnel with a small number of people in a simple and short time, and the second lining concrete (C) can be easily cast. It can be carried out.

In the first embodiment, when the air pressure is low, the waterproof sheet (S) does not float,
Although (S) may not be attached to the primary lining concrete (B), according to the present embodiment, even if the air pressure is small, the air mat (19) is surely inflated. Regardless of the size, the waterproof sheet (S) can be securely attached to the primary lining concrete (B).

[0038]

According to the present invention, the following effects can be obtained. (a) In the invention described in any claim
Also, compared to the conventional method, the waterproof sheet can be uniformly attached to the inner surface of the tunnel with a small number of people and in a short time. In addition, since a wider waterproof sheet can be used as compared with the conventional case, the number of welding points for joining the waterproof sheets is reduced, and the possibility of cracks at the welding points and lack of water tightness due to unwelding is remarkable. Can be reduced. Further, conventionally, a sheet sticking work cart or the like is required to mount the waterproof sheet, but these can be eliminated. (b) Further, according to the first aspect of the present invention, the waterproof sheet can be mounted in a shorter time.

(C) According to the second aspect of the present invention, since the waterproof sheet is mounted in order from the entrance side of the tunnel to the opposite side, the waterproof sheet can be mounted more uniformly.

(D) According to the third aspect of the present invention, the waterproof sheet can be easily and cleanly attached to the inner surface of the tunnel by a small number of people in a short time, and even if the air pressure is low, the air mat can be used. Since the inflation is ensured, the waterproof sheet can be securely attached regardless of the magnitude of the air pressure. You can also store the air mat when not in use,
The mat can be easily deployed on the outer wall.

(E) According to the invention of claim 4 , waterproofing
Seats can be easily transported and deployed on a work cart.
You.

(F) According to the fifth aspect of the invention, the primary
In a small number of people, easily and in a short time on lining concrete
Can be fitted with a waterproof sheet.

(G) According to the invention of claim 6 , since the waterproof sheet is completely fixed to the inner surface of the tunnel, the secondary lining concrete is poured, so that the secondary lining concrete is poured. The work is easy, and a series of work up to the placement of the secondary lining concrete can be smoothly performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a state before a waterproof sheet is attached according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional front view of a main part of FIG. 1;

FIG. 3 is a vertical sectional side view along the line III-III of FIG. 1;

FIG. 4 is a longitudinal sectional front view showing a state when the mounting of the waterproof sheet is completed.

FIG. 5 is a longitudinal sectional side view of a main part showing a modification.

FIG. 6 is a longitudinal sectional front view showing a state before a waterproof sheet is attached according to a second embodiment of the present invention.

FIG. 7 is a vertical cross-sectional front view showing a state when the mounting of the waterproof sheet is completed.

[Explanation of symbols]

 (1) Ground (2) Excavation hole (3) Rail (4) Centre (working trolley) (5) Wheel (6) Beam (7) Strut (8) Centre body (9) Outer wall (outer surface) (10) (11) Work table (12) Main body (13) Surface fastener (clamping layer) (14) Support member (15) Concrete needle (16) Air pipe (pressing means) (16a) Folded part (17) Injection hole (18) Air tube (19) Air mat (pressing means) (20) Opening (21) Storage part (22) Winding shaft (23) Air pipe (A) Ground (B) Primary lining concrete (C) Secondary lining concrete (S) Tarpaulin (S ') Tarpaulin

Claims (6)

(57) [Claims] The present invention is characterized in that after a support member having a surface fastener is fixed to an inner surface of a tunnel, the support member can travel in the tunnel, and has an outer surface shape smaller than and substantially similar to the inner surface shape of the tunnel. On the outer surface of the work cart having a shape, a waterproof sheet provided with an engaging layer capable of engaging with the hook-and-loop fastener on the outer surface is developed, and one end serves as an air supply source between the work cart and the waterproof sheet. Connected and on the surface, t
Air with injection holes opening toward the inner surface of the panel
A pressing means consisting of a pipe is provided, and air is supplied to the air pipe.
And by the pressure of the air injected from the injection hole,
Raise the waterproof sheet toward the inside of the tunnel
And attaching the waterproof sheet to the inner surface of the tunnel by pressing the waterproof sheet on the outer surface of the waterproof sheet to engage the engaging layer on the outer surface of the waterproof member. 2. A large number of injection holes are provided in an air pipe in the length direction of a tunnel, and the amount of air injected from each injection hole is increased toward the entrance of the tunnel and decreased toward the opposite side. The method for mounting a waterproof sheet in a tunnel according to claim 1, wherein: 3. A hook-and-loop fastener on the inner surface of the tunnel.
After fastening the supporting member having
And the outer shape is smaller than the inner shape of the tunnel.
Dimensions, and on the outer surface of a work trolley approximately similar in shape
The outer surface is provided with a binding layer capable of binding to the hook-and-loop fastener.
Expand the tarpaulin, and connect the work cart and tarpaulin
In the meantime, while being connected to the air supply,
Pressing means consisting of an air mat deployed on the outer surface is provided.
Activating the air supply to inflate the air mat
Pushes the waterproof sheet toward the inner surface of the tunnel.
Pressing the anchoring layer on the outer surface of the waterproof sheet
By attaching to the material, the waterproof sheet can be
Surface, and an opening at the top of the work cart.
And a storage part is formed below the opening,
Wind the air mat when not in use on the winding shaft arranged in the section
Mounting side of the waterproof sheet over preparative into the tunnel, characterized in Rukoto
Law. 4. A hook-and-loop fastener on the inner surface of the tunnel.
After fastening the supporting member having
And the outer shape is smaller than the inner shape of the tunnel.
The top of a work cart that is sized and almost similar to it
The outer surface is provided with a binding layer capable of binding to the hook-and-loop fastener.
With the waterproof sheet wound from both sides to the center,
After placing it, unfold it to both sides,
By the pressing means provided between the car and the waterproof sheet,
Press the water sheet toward the inside of the tunnel to
The anchoring layer on the outer surface of the
By installing a tarpaulin on the inner surface of the tunnel
A method of mounting a waterproof sheet in a tunnel, characterized by the following. 5. After forming the primary lining concrete on the inner surface of the tunnel, the tunnel according to claim 1, characterized in that the fastening of the support member to the primary lining concrete How to attach a tarpaulin to 6. After the tarpaulin is attached to the inner surface of the tunnel, according to claim 1, characterized in that the concrete is cast between the inner and outer surfaces of the working carriage tarpaulin To install a tarpaulin in a tunnel.