JPH10317898A - Method and device for installing waterproof sheet into tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability by pushing and engaging waterproof sheets to a plurality of beltlike support members with surface fasteners fixed in the longitudinal direction of the inner circumference of a tunnel. SOLUTION: A work truck 4, to which moving frames 13 having size smaller than the tunnel and an approximately similar figure are installed, is arranged at a work place, and primary lining concrete B is sprayed against the inner circumference of the tunnel at the time of the execution of works. A plurality of beltlike support members 29, on which surface fasteners are fixed, are fastened on the surface of the lining B in the longitudinal direction of the tunnel while being separated in the circumferential direction. The waterproof sheet S with engaging layers capable of being engaged with the surface fasteners and consisting of a nonwoven fabric, etc., is wound beforehand in the central direction from both sides, each wound section is placed into the recessed sections 24 of the left-right frames 13, the sheet S is spread downwards along the frames 13, and the frames 13 are brought near to the lining B by hydraulic cylinders 17. Air tubes 31 are supplied with air and expanded, and the sheet S is press-contacted and mounted on the support members 29. Accordingly, the waterproof sheet having broad width can be installed easily, uniformly and firmly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus 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, a waterproof sheet is generally mounted on the inner surface of the tunnel. Conventionally, this mounting work has been performed by an operator driving a concrete nail or the like through a waterproof sheet into the inner surface of the tunnel from a scaffold or a work bench installed in the tunnel.

However, the above method not only requires a large number of workers, but also requires a long working time and is inefficient.

In order to enable the waterproof sheet to be easily and quickly mounted on the inner surface of the tunnel, the present applicant has provided a small circular support member having a surface fastener on the inner surface of the tunnel, Attachment of a waterproof sheet in which a large number of the waterproof sheets are fixed in advance, and the waterproof sheet is provided in the tunnel by attaching the fastening layer of the waterproof sheet having an outer layer to the hook-and-loop fastener of the support member. A method has been invented, and a patent application (Japanese Patent Application No. 8-206958) has already been filed.

[0005]

However, in this mounting method, a large number of support members are fixed to the inner surface of the tunnel in a random manner. Therefore, the worker cannot hide the waterproof sheet on the support member while checking the position of the support member. For this reason, the work of attaching the waterproof sheet may not be performed smoothly, and the attached waterproof sheet may be easily sagged. As a result, the usage amount of the waterproof sheet increases and the cost increases.

On the inner surface of the tunnel to which the support member is attached, a plurality of reinforcing supports may be provided at predetermined intervals along the length of the tunnel. The above-mentioned support member is mounted so as to avoid the support work. Therefore, when the end of the waterproof sheet to be attached to the tunnel coincides with the position of the support, the end of the waterproof sheet must be attached to the support member provided before the support. Inevitably, the end of the waterproof sheet is sagged.

[0007] Further, in the above-mentioned patent application, the present applicant installs a work truck having a size smaller than the inner surface shape of the tunnel and substantially similar to the inside of the tunnel, and places the work truck on the outer peripheral surface of the work truck. By deploying the waterproof sheet, inflating the air tube disposed between the work cart and the waterproof sheet, and pressing the anchor layer of the waterproof sheet against the above-described support member, the waterproof sheet can be easily and easily formed. A device to be worn in a short time is proposed.

However, as described above, since the support member is randomly fixed to the inner surface of the tunnel, in order to press the waterproof sheet against each support member, the air tube needs to be substantially the same size as the waterproof sheet. Must be very large. However, increasing the size of the air tube increases its volume, making it difficult to inflate the entire air tube strongly. As a result, the pressing force of the air tube decreases, and the entire waterproof sheet is placed on the inner surface of the tunnel. It was difficult to attach firmly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has been made in such a manner that a waterproof sheet can be uniformly and securely attached to the inner surface of a tunnel in a short time. It is an object of the present invention to provide a method and an apparatus for mounting a waterproof sheet in a tunnel.

[0010]

According to the present invention, the above-mentioned problem is solved as follows. (1) In the installation method of the waterproof sheet in the tunnel,
On the inner surface of the tunnel, a plurality of belt-shaped support members having surface fasteners on the surface are fastened to each other in the circumferential direction of the inner surface of the tunnel, separated from each other, and oriented in the longitudinal direction of the tunnel,
By pressing a waterproof sheet provided on the outer surface with an anchoring layer capable of engaging with the hook-and-loop fastener toward the inner surface of the tunnel, and attaching the anchoring layer to the hook-and-loop fastener of the support member, the waterproof sheet is attached to the tunnel. Attach to the inner surface.

(2) Similarly, in the method of mounting a waterproof sheet, a plurality of belt-shaped support members having surface fasteners on the inner surface of the tunnel are separated from each other in the circumferential direction of the inner surface of the tunnel, and the longitudinal direction of the tunnel is It is fixed so that it faces to face, the outer surface shape is smaller than the inner surface shape of the tunnel, and on the outer surface of the work cart that is substantially similar to the outer surface, the fastening layer that can be fastened to the surface fastener is provided on the outer surface. Expanding the waterproof sheet provided, and provided at a position facing the support member on the outer surface of the work cart, by pressing means facing the longitudinal direction of the tunnel, pressing the waterproof sheet toward the inner surface of the tunnel, The waterproof layer is attached to the inner surface of the tunnel with the engaging layer engaged with the hook-and-loop fastener of the support member.

(3) In the above item (2), the waterproof sheet is placed on the top of the work cart in a state where the waterproof sheet is wound from both sides to the center, and then expanded toward both sides. Thereby, the waterproof sheet is spread on the outer surface of the work cart.

(4) In the device for mounting a waterproof sheet in a tunnel, a plurality of belt-like supports fixed to the inner surface of the tunnel so as to be circumferentially separated from each other and to face the longitudinal direction of the tunnel. A waterproof sheet mounting device for attaching a fastening layer provided on an outer surface of a waterproof sheet to a surface fastener formed on a surface of a member, the longitudinal direction of the tunnel being laid on a bottom surface in the tunnel. Along the rail facing the outside, outside the work cart that can move in the tunnel,
The outer shape is smaller than the inner shape of the tunnel, and is substantially similar to the outer shape, and a waterproof sheet before mounting is deployed on the outer surface, and an outer frame close to the inner surface of the tunnel is attached, At a position facing the support member between the outer surface of the outer frame and the waterproof sheet, a pressing unit that faces the longitudinal direction of the tunnel and presses the waterproof sheet toward the support member is disposed.

(5) In the above item (4), the pressing means comprises:
An air tube connected to the air supply source.

(6) In the above item (4) or (5), a recess is formed at the upper end of the outer frame for mounting a waterproof sheet wound from both sides toward the center.

(7) In any one of the above items (4) to (6), the outer frame is vertically movable with respect to the work cart.

[0017]

An embodiment of the present invention will be described below with reference to the accompanying drawings. In the following description, the right side of FIG. 1 and the back side of the paper of FIGS. 2 and 3 are referred to as “front”, and the left side of FIG. 1 and the front of the paper of FIGS. 2 and 3 are referred to as “rear”. And

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

The work cart (4) is provided with lower end portions of a front U-shaped front frame (6) and a rear frame (7) disposed at the front and rear, and a horizontal beam.
(8) The front frame (6) and the rear frame (7) are connected by the connecting rod (9), the intermediate plate (10), and the support plate (11). A pair of left and right arched moving frames (13) (13), which are smaller and almost similar in shape to the upper half of the excavation hole (2), are attached to the outer periphery of the constructed work vehicle body (12). Horizontal work platforms (14) and (15) are provided before and after the work vehicle body (12).

The left and right connecting rods (9) are connected by a plurality of lateral beams (16). An intermediate plate (1) that joins the lower portions of the front frame (6) and the rear frame (7) at the substantially central portions in the vertical direction,
0) is wider than the front frame (6) and the rear frame (7),
Hydraulic cylinders (17) (17) for moving the moving frames (13) (13) up and down are provided at two places in front of and behind the left and right ends.

A front-rear gap is provided between a pair of left and right support plates (11), (11) that connect the upper and lower frames of the front frame (6) and the rear frame (7) slightly above each other. A pair of open / close plates (19) (19) is provided on the upper surfaces of both support plates (11) so as to be movable in the left-right direction. Both open / close plates (1
At the inner edge of the upper surface of 9), a holding member (20) whose upper surface is recessed downward for mounting a waterproof sheet (S) wound into eyeglasses described later is fixed.

The left and right moving frames (13) and (13) are a front rod (21) and a rear rod (22), which are smaller than the upper half of the excavation hole (2) and have substantially similar shapes.
Are connected by four mounting rods (23) and (23) facing in the front-rear direction, and the upper ends of the front rod (21) and the rear rod (22) are provided with waterproof glasses wound like glasses. A recess for placing the sheet (S)
(24) is formed.

An air tube (31) connected to an air supply source (not shown) is fixed to each mounting rod (23).
The air tube (31) is in a state of being thinly folded (see FIG. 4) at all times when air is released, and expands in a circular cross section when air is supplied (see FIG. 5).

The upper rods 6a and 7a of the front frame 6 and the rear frame 7 are provided with three electric winches 25, 26 and 26, respectively.

After moving the work cart (4) to the place where the waterproof sheet (S) is to be mounted, the work table (14) (15) is used to move the inner periphery of the ground excavation hole (2). On the surface, multiple arched supports (27) were installed along the length of the tunnel,
Primary lining concrete by spraying inside (2)
(B) is formed. On the surface of the primary lining concrete (B), a plurality of belt-like supporting members (29) having surface fasteners (28) fixed to the surface are spaced apart from each other in the circumferential direction and face the longitudinal direction of the tunnel. Then, it is fixed with a concrete needle (30). Note that the short supporting members (29) may be linearly fastened while sequentially extending in the longitudinal direction of the tunnel.

Next, for example, the inner side (working trolley (4) side) is made of a non-water permeable synthetic resin sheet, and the outer side (the inner side of the tunnel) is made of nonwoven fabric or the like which can engage with the hook-and-loop fastener (28). A waterproof sheet (S) whose front and rear length is slightly longer than that of the moving frame (13), has a double structure with an anchoring layer formed thereon, and has a core material (T) facing in the front and rear direction attached to both left and right side edges. ) Is wound in advance in the center direction from the left and right sides to form a pair of right and left wound parts in a front view spectacle shape, and placed on the center of the intermediate plate (10) as it is (FIG. 2 virtual line).

Subsequently, the opening / closing plates (19) and (19) are slid to open the gap (18), and the wires (25) of the electric winch (25) at the center of the front frame (6) and the rear frame (7). After fixing the lower end portion of the waterproof sheet (W) to the front and rear ends of the core material (T) of the waterproof sheet (S), the electric winch (25) is actuated to move the waterproof sheet (S) through the gap (1).
After being lifted once above 8), the open / close plates (19) and (19) are closed, and the waterproof sheet (S) is placed on the holding members (20) and (20) (see phantom lines in FIG. 2).

The wire (W) of the electric winch (25) is
Remove from (T), electric winches on both left and right sides (26) (26)
After fixing the wire (W) to the left and right core members (T), the electric winches (26) and (26) are operated to
Move the left and right winding parts of (S) to the left and right moving frames (13) and (13), respectively.
(See solid line in FIG. 2).

Next, the wire (W) is removed from the core material (T), and the waterproof sheet (S) is spread obliquely downward along the moving frames (13) (13) (see the phantom line in FIG. 2). ), The moving frame (13) and the air tube (31) are covered with a waterproof sheet (S), and the piston rods of the hydraulic cylinders (17) and (17) are extended to move the moving frame (1).
3) is raised until it approaches the upper half of the primary lining concrete (B) (see FIGS. 1 and 3). The moving frame is shown in FIGS. 1 and 3
When the air tube (31) rises to the position shown in (1), each air tube (31) comes to face the support member (27) (see FIGS. 1 and 3).

Next, the rear end of the waterproof sheet (S) is attached to the front end of the preceding waterproof sheet (S ') already mounted on the inner surface of the tunnel and having the secondary lining concrete (C) formed on the inner surface. After joining by heat welding etc., operate the air supply source,
Supply air to the air tube (31).

Then, the air tube (3
1) expands, the waterproof sheet (S) is moved to the support member (29) side, and the fastening layer such as a nonwoven fabric formed on the outer surface of the waterproof sheet (S) is fixed to the surface fastener of the support member (29). By being pressed against (28), the upper half of the waterproof sheet (S) is uniformly attached to the inner surface of the primary lining concrete (B). At this time, since the front end of the waterproof sheet (S) is not in contact with the air tube (31), the front end of the waterproof sheet (S) is not in contact with the primary lining concrete (B). Become.

The lower end of the waterproof sheet (S) is moved by a vibrator or the like (not shown) by a worker to a portion of the waterproof sheet (S) opposed to the supporting member (29) at the lower end by the supporting member (29). By pressing the primary lining concrete
It is attached to the inner surface of (B).

When the supply of air is stopped, the air tube (31)
After squeezing, 2 pieces are placed inside the attached waterproof sheet (S).
Next, lining concrete is cast and hardened (not shown). The front end of the waterproof sheet (S) is joined to the rear end of the next waterproof sheet.

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.

In this way, the primary lining concrete
Attach a support member (29) having a hook-and-loop fastener (28) to (B) and inflate an air tube (31), which is considerably smaller and smaller in volume than the waterproof sheet (S), and
Since only the contact portion with the support member (29) in (S) is pressed, the pressure in the air tube (31) can be easily increased. For this reason, the waterproof sheet (S) can be pressed with a stronger force than before, and the waterproof sheet (S) can be pressed.
(S) can be firmly attached to the support member (29).

The mounting work can be performed easily and in a short time by a small number of people, and the mounted waterproof sheet is mounted.
In (S), there is little possibility that a slack is generated, and it becomes extremely uniform.

Further, even when the support (27) is provided on the inner surface of the tunnel as in the present embodiment, the support member (29) can be attached to the support (27) in an overlapping manner. Therefore, even when the end of the waterproof sheet (S) coincides with the mounting position of the shoring (27), the end of the waterproof sheet (S) can be attached to that part, and the waterproof sheet (S) No sagging occurs at the end of the.

Further, regardless of the air tube (31), when the worker presses the waterproof sheet (S) against the support member (29) with a vibrator or the like to attach the waterproof sheet (S), the waterproof Support member at the place where the seat (S) is to be mounted
(29) is covered by the waterproof sheet (S), and the operator cannot confirm the mounting position. But,
The support member (29) extends linearly in the front-rear direction of the tunnel, and in front of the waterproof sheet (S) to be mounted, the support member (29) is exposed. The work of mounting the waterproof sheet (S) can be performed while grasping the mounting position of (29). Therefore, the waterproof sheet (S)
Can be easily mounted, and the waterproof sheet (S) can be mounted uniformly.

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 (38) may be directly attached to the excavation hole (2), and the waterproof sheet (S) may be attached in the same manner as described above.

[0041]

According to the present invention, the following effects can be obtained. (a) When the worker presses the waterproof sheet against the support member with a vibrator or the like and attaches the waterproof sheet,
The support member at the place where the waterproof sheet is to be mounted is covered with the waterproof sheet, and the operator cannot confirm the mounting position. However, since the support member extends linearly in the front-rear direction of the tunnel, and the support member is exposed in front of the waterproof sheet to be mounted, the worker grasps the mounting position of the support member while grasping the mounting position. ,
The work of attaching the waterproof sheet can be performed. Therefore, the work of attaching the waterproof sheet becomes easy, and the wide waterproof sheet can be attached uniformly and easily.

The mounting operation can be performed easily and in a short time by a small number of people.

Further, even when a shoring is provided on the inner surface of the tunnel, the supporting member can be mounted on the shoring. Therefore, even when the end of the waterproof sheet coincides with the mounting position of the shoring, it is possible to attach the end of the waterproof sheet to that part, and the end of the waterproof sheet does not sag (the above) The invention according to claim 1).

(B) According to the second and fourth aspects of the present invention, only the portion of the waterproof sheet facing the support member is pressed toward the support member by the pressing means. Power of the pressing means can be reduced as compared with the case of pressing, and energy saving can be achieved.

(C) According to the third aspect of the invention, the work of deploying the waterproof sheet on the outer surface of the work cart becomes easy.

(D) According to the fifth aspect of the present invention, the air tube, which is considerably smaller than the waterproof sheet and has a small volume, is inflated to press only the contact portion of the waterproof sheet with the support member. The pressure in the tube can be easily increased. Therefore, the waterproof sheet can be pressed with a stronger force than before, and the waterproof sheet can be firmly attached to the support member.

(E) According to the sixth aspect of the present invention, when the waterproof sheet wound from the left and right sides to the center is spread on the outer surface of the outer frame, the waterproof sheet is wound from the left and right sides to the center. Since the turned waterproof sheet can be temporarily placed on the upper end portion of the outer frame, subsequent deployment work of the waterproof sheet becomes easy.

(F) According to the seventh aspect of the present invention, the operation of spreading the waterproof sheet on the outer surface of the outer frame can be performed after lowering the outer frame to a lower position. Deployment work becomes easier. After that, if the outer frame is raised, the waterproof sheet can be brought closer to the inner surface of the tunnel.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional front view showing a state before the waterproof sheet is attached.

FIG. 3 is a vertical sectional side view showing a state after the waterproof sheet is attached.

FIG. 4 is an enlarged sectional view showing a state where the support member is fixed to the inner surface of the tunnel.

[Explanation of symbols]

 (1) Ground (2) Excavation hole (3) Rail (4) Work trolley (5) Wheel (6) Front frame (7) Rear frame (8) Beam (9) Connecting rod (10) Intermediate plate (11 ) Support plate (12) Work cart body (13) Moving frame (14) (15) Work table (16) Beam (17) Hydraulic cylinder (18) Clearance (19) Opening / closing plate (20) Holding member (21) Front Rod (22) Rear rod (23) Mounting rod (24) Recess (25) (26) Electric winch (27) Shoring (28) Surface fastener (29) Support member (30) Concrete needle (31) Air tube (A ) Ground (B) Primary lining concrete (C) Secondary lining concrete (S) Waterproof sheet (S ') Waterproof sheet (T) Core material (W) Wire

Claims (7)

[Claims] 1. A plurality of belt-shaped support members having a surface fastener on the surface thereof are fixed to an inner surface of the tunnel so as to be spaced apart from each other in a circumferential direction of the inner surface of the tunnel and to face a longitudinal direction of the tunnel. By pressing a waterproof sheet provided with an anchoring layer capable of engaging with the hook-and-loop fastener on the outer surface toward the inner surface of the tunnel, and attaching the anchoring layer to the hook-and-loop fastener of the support member, the waterproof sheet is attached to the inner surface of the tunnel. A method of mounting a waterproof sheet in a tunnel, which is mounted on a tunnel. 2. A plurality of belt-shaped support members having surface fasteners on the inner surface of the tunnel are fastened to the inner surface of the tunnel so as to be spaced apart from each other in the circumferential direction of the inner surface of the tunnel and face the longitudinal direction of the tunnel. A waterproof sheet having a fastening layer capable of engaging with the hook-and-loop fastener on the outer surface is developed on the outer surface of a work cart having a shape smaller than the inner shape of the tunnel and having a shape similar to that of the tunnel. The waterproof sheet is pressed toward the inner surface of the tunnel by a pressing means provided at a position facing the support member on the outer surface of the carriage and facing the longitudinal direction of the tunnel, and the fastening layer is fixed to the surface fastener of the support member. And attaching the waterproof sheet to the inner surface of the tunnel. 3. After placing the waterproof sheet on the top of the working cart in a state of being wound from both sides to the center,
3. The method for mounting a waterproof sheet in a tunnel according to claim 2, wherein the waterproof sheet is deployed on the outer surface of the work cart by expanding toward both sides. 4. A waterproof sheet formed on a surface fastener of a plurality of belt-shaped support members, which is fixed to an inner surface of the tunnel so as to be circumferentially separated from each other and oriented in a longitudinal direction of the tunnel. A waterproof sheet attaching device for attaching an engaging layer provided on an outer surface of the tunnel, which can move in the tunnel along a rail laid on a bottom surface in the tunnel and facing the longitudinal direction of the tunnel. On the outside of the work cart, the outer shape is smaller than the inner shape of the tunnel and substantially similar to the shape, and the waterproof sheet before mounting is deployed on the outer surface, and the outer surface is close to the inner surface of the tunnel. Attach the outer frame to a position facing the support member between the outer surface of the outer frame and the waterproof sheet,
A device for mounting a waterproof sheet in a tunnel, characterized in that a pressing means for pressing the waterproof sheet toward a support member is provided in the tunnel in a longitudinal direction. 5. The device for mounting a waterproof sheet in a tunnel according to claim 4, wherein the pressing means is an air tube connected to an air supply source. 6. The tunnel according to claim 4, wherein a concave portion for mounting a waterproof sheet wound in a state of being wound from both sides to a center portion side is formed at an upper end portion of the outer frame. A device for mounting a waterproof sheet inside. 7. The mounting device for a waterproof sheet in a tunnel according to claim 4, wherein the outer frame is movable vertically with respect to the work cart.