JPH06229198A - Method and device for spreading waterproof sheet - Google Patents

Abstract

PURPOSE:To fix only both side edges of the cushioning material of a waterproof sheet easily on the bedrock side when the waterproof sheet is spread on the bedrock side. CONSTITUTION:A waterproof sheet 1 wound in a rolled shape is rewound, and both side edges 3a of the cushioning cloth 3 of the waterproof sheet 1 are peeled and floated from both side edges of a water-barrier sheet 2 by a guide pawl 16. The surface of the cushioning cloth 3 is held down and abutted against the bedrock 21 side by a roller 14 while only both side edges 3a of the cushioning cloth 3 are fixed on the bedrock 21 side and the crossing direction of the inwall surface 20a of a road 20 is covered continuously with the only both side edges 3a of the cushioning cloth 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet spreading method and apparatus for spreading spring water which is stretched on the inner wall surface of a tunnel excavation tunnel and leaches from the ground of the tunnel.

[0002]

2. Description of the Related Art In the NATM method, after excavating a tunnel excavation road, the surface of the ground, which is the inner wall surface, is
Primary lining concrete is sprayed. Then, a waterproof sheet is spread on the primary lining concrete, and the secondary lining concrete is placed on the waterproof sheet. That is, between the primary lining concrete and the secondary lining concrete, a waterproof sheet is interposed, and the spring water from the primary lining concrete side is passed between the primary lining concrete and the waterproof sheet, The spring water is prevented from leaching to the concrete side of the secondary lining.

This waterproof sheet has a structure formed by laminating a water-blocking sheet and a nonwoven fabric or a loop-shaped raised woven fabric as a water-permeable cushioning material. The waterproof sheet is spread on the primary lining concrete. At this time, the surface of the water-permeable cushioning material is brought into contact with the primary lining concrete side by the pressing roller of the spreading device, and only the both side edges of the cushioning material are sequentially fixed in the transverse direction of the tunnel by using nails or the like. It was

[0004]

However, in the above-mentioned conventional waterproof sheet spreading method, when the waterproof sheet is attached to the primary lining concrete (ground) side, the pressing roller of the spreading device applies the waterproof sheet to the primary lining concrete. There is a drawback that the water-permeable cushioning material and the water-blocking sheet are in a polymerized state because they are pressed against the side over the entire width. Therefore, there is a problem that the operator has to perform a complicated work of lifting both side edges of the water-impervious sheet and then fixing both side edges of the cushioning material to the natural ground side.

Therefore, in order to solve the above-mentioned problems, the present invention is a waterproof method in which only the both side edges of the cushioning material of the waterproof sheet can be easily fixed to the natural side when the waterproof sheet is extended to the natural side. It is an object of the present invention to provide a sheet spreading method and its apparatus.

[0006]

Means for achieving the above object will be described below with reference to the drawings corresponding to the embodiments. According to the waterproof sheet spreading method of the present invention, the water-permeable cushioning cloth 3 is provided on the ground-facing surface 2a of the water-blocking sheet 2.
A plurality of intermediate portions are adhered to be overlapped and formed, and on the inner wall surface 20a of the tunnel excavation tunnel 20, the ground 21 of the tunnel 20 is formed.
In the method of spreading the waterproof sheet 1 for collecting and draining spring water leaching from the tunnel to both side bottoms of the tunnel 20, after the waterproof sheet 1 wound in a roll is unwound, a buffer cloth for the waterproof sheet 1 is released. The side edges 3a of the buffer sheet 3 are separated from the side edges of the water-impervious sheet 2 to float, and the surface of the buffer cloth 3 is pressed against the ground 21 side by the pressing roller 14, and at the same time, only the side edges 3a of the buffer cloth 3 are held. Is fixed to the ground 21 side and is continuously applied in the transverse direction of the inner wall surface 20a of the mine shaft 20.

The waterproof sheet spreading device 1 of the present invention
In the case of 0, the cushioning cloth 3 having water permeability is overlapped and formed on the ground facing surface 2a of the water blocking sheet 2 at a plurality of intermediate places, and the inner wall surface 20a of the tunnel excavation road 20 is In a device for spreading the waterproof sheet 1 for collecting and draining spring water leaching from the rock mass 21 of the mine shaft 20 to both bottoms of the mine shaft 20, the cushioning cloth 3 surface of the waterproof sheet 1 is brought into contact with the rock mass 21 side. The pressure roller 14 and guide claws 16 disposed at both ends of the pressure roller 14 for separating and floating the both side edges 3a of the cushioning cloth 3 of the waterproof sheet 1 from the both side edges of the waterproof sheet 2. It is characterized by having done.

[0008]

The waterproof sheet 1 wound in the form of a roll is placed on the spreading device 10 to be unwound, and the cushioning cloth 3 side of the waterproof sheet 1 is pressed against the ground 21 side by the pressing roller 14. Contact. At both ends of the pressing roller 14, both side edges 3 a of the cushioning cloth 3 of the waterproof sheet 1 are connected to the guide claws 16.
Are separated from both side edges of the water shield sheet 2 and floated. Then, only both side edges 3a of the cushioning cloth 3 are fixed to the natural ground 21 side, and the inner wall surface 20a of the gallery 20 is continuously applied in the transverse direction and stretched.

[0009]

EXAMPLES First, the waterproof sheet 1 used in the spreading device of the present invention will be described. As shown in FIG. 2, the waterproof sheet 1 is composed of a waterproof sheet 2 and a cushioning cloth 3. The waterproof sheet 2 is formed in a wide band shape from a soft thermoplastic resin such as polyethylene, polypropylene, polyvinyl chloride, ethylene / vinyl acetate copolymer, or a soft synthetic rubber such as an elastomer. Also,
The buffer cloth 3 has water permeability such as a raised cloth in which a loop is woven into a non-woven fabric or a polyethylene polypropylene fabric, and is formed to have a width slightly shorter than that of the water blocking sheet 2.

The cushioning cloth 3 is formed on one surface 2a of the water-impervious sheet 2 which is a ground-facing surface, and the cushioning cloth 3 is formed on the impermeable sheet 2 by point bonding or line bonding. A plurality of intermediate portions are bonded intermittently.

The side edge portions of the waterproof sheet 1 are
The water-blocking sheet 2 and the buffer cloth 3 are not adhered to each other and are in a free state.

Next, a spreading device 10 for spreading the above-mentioned waterproof sheet 1 on the inner wall surface 20a of the tunnel will be described. As shown in FIG. 1, the spreading device 10 is provided with the tunnel 20 after the primary lining concrete 22 is sprayed on the ground surface which is the inner wall surface 20a of the tunnel excavating tunnel 20.
The work platform 11 framed inside is moved on a curved guide rail 12 arranged along the transverse direction of the inner wall surface 20a of the tunnel 20.

In the spreading device 10, the waterproof sheet 1 wound in a roll shape is placed, and a delivery mechanism (not shown) for unraveling the rolled waterproof sheet 1 at a predetermined pitch is built in. . The delivery mechanism is interlocked with a transport mechanism (not shown) that moves on the guide rail 12.

Further, a pair of arms 13 are extended in the spreading device 10, and a pressing roller 14 is rotatably and substantially horizontally supported between the ends of the arms 13. At both ends of the pressing roller 14, substantially L-shaped guide claws 16 are provided in a protruding manner.

Then, as shown in FIG. 2, the waterproof sheet 1 unwound by the above-mentioned delivery mechanism is extended and supported by a pair of arms 13 with the cushioning cloth 3 side as the surface, and each arm 13 is supported. With the pressing roller 14 between the tips, the cushioning cloth 3 surface of the waterproof sheet 1 is brought into contact with the stretched portion such as the inner wall surface 20a of the gallery 20, and the space between the polymerized water-blocking sheet 2 and the cushioning cloth 3 is brought into contact. The side edges 3a of the cushioning cloth 3 are separated from the side edges of the water-impervious sheet 2 by the guide claws 16 inserted into the surface of the water-permeable sheet 2 so as to float.

The spreading device 10 is also provided with a workbench 15 on which a worker is to ride. This work table 15
Is configured in a gondola shape and is provided so as to be always in a suspended state with respect to the main body of the spreading device 10 moving on the guide rail 12.

Next, the spreading device 1 configured as described above.
A method of spreading the waterproof sheet 1 on the tunnel excavation road 20 according to 0 will be described. First, the above-mentioned waterproof sheet 1 is wound in a roll so that the surface facing the natural ground 21 side, that is, the cushioning cloth 3 side is the inside.

Then, the roll-shaped waterproof sheet 1 is
As shown in FIG. 1, while being placed on the spreading device 10,
The tip of the sheet 1 is hung on the pressing roller 14,
As shown in FIG. 3, both the guide claws 16 are hooked only on both side edges 3a of the cushioning cloth 3 of the waterproof sheet 1 to float from the water-blocking sheet 2 to start the expansion.

When the spreading is started, the spreading device 10 causes the roll-shaped waterproof sheet 1 to be unraveled by the feeding mechanism and presses the cushioning cloth 3 side of the waterproof sheet 1 to the roller 1.
In step 4, contact the natural ground 21 side. At this time, both side edges 3 of the cushioning cloth 3 of the waterproof sheet 1 are secured at both ends of the pressing roller 14.
a is peeled from the both side edges of the water-impervious sheet 2 by the guide claws 16 and floats up.
An operator on the workbench 15 secures both side edges 3a of the cushioning cloth 3 to the natural ground side with nails 4 or the like through the gap between the both sides of the water blocking sheet 2.

Then, the spreading device 10 feeds the waterproof sheet 1 at a predetermined pitch by the feeding mechanism, and moves the guide rail upper portion 12 in the transverse direction of the tunnel 20 in accordance with this pitch by the feeding mechanism interlocking with the feeding mechanism. Then, the worker sequentially fixes both side edges 3a of the waterproof sheet 1 to the natural ground 21 side with nails 4 or the like.

Although the waterproof sheet 2 of the waterproof sheet 1 moves on the pressing roller 14 over the entire width, the cushion cloth 3 is guided by the guide claws 16 so that both side edges 3a thereof are separated from the waterproof sheet 2. Because it moves while causing
The operator fixes only the cushioning cloth 3 to the ground 21 side at predetermined intervals from this gap.

When the waterproof sheet 1 is applied and stretched in the transverse direction of the gallery 20, the stretching device 10 moves together with the guide rails 12 on the pedestal 11, and the above operation is repeated.
The inner wall surface 20a of the tunnel 20 is covered with the waterproof sheet 1, and then welded to the edge of the adjacent water-impervious sheet, followed by the step of placing secondary lining concrete.

Therefore, the waterproof sheet 1 thus constructed
In the stretching device 10, the cushioning cloth 3 surface of the waterproof sheet 1 is brought into contact with the ground 21 side by the pressing roller 14, and the waterproof sheet 1 is guided by the guide claws 16 provided at both ends of the pressing roller 14. Since the both side edges of the water blocking sheet 2 and the both side edges 3a of the buffer cloth 3 are separated from each other and the both side edges 3a of the buffer cloth 3 are floated above the water blocking sheet 2, the waterproof sheet 1 does not become a superposed state, and this buffer Cloth 3 ground 2
The work can be easily performed when fixing to the 1 side with the nail 4 or the like.

As a result, since it is not necessary to perform the complicated work of lifting both side edges of the water-impervious sheet 2, it becomes possible to automatically fix the cushioning cloth 3 to the natural ground 21 side, which saves manpower. Labor saving can be achieved.

In the above embodiment, the spreading device 10 is provided with the gondola-shaped work table 15 on which the worker rides, but the worker works on the work platform 11 as shown in FIG. The spreading device 10A configured to perform the above may be used.

[0026]

As described above, in the waterproof sheet spreading method and apparatus according to the present invention, the cushioning cloth surface of the waterproof sheet is brought into contact with the ground side by the pressing roller, and
By the guide claws arranged at both ends of the pressing roller, the water shield sheet both side edges of the waterproof sheet and the both side edges of the cushioning cloth are separated from each other, so that both side edges of the cushioning cloth are floated from the water shield sheet. There is an effect that the waterproof sheet does not become a polymerized state.

As a result, a gap is formed between the side edges of the cushioning cloth and the side edges of the impermeable sheet, so that the work can be easily performed when the cushioning cloth is fixed to the ground side with nails or the like. There is.

Further, since it is not necessary to perform the complicated work of lifting both side edges of the water-impervious sheet, there is an effect that the cushioning cloth can be fixed to the ground side in a shorter time than in the conventional case. Further, this fixing work can be automated, which has the effect of saving labor and labor.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a waterproof sheet spreading device according to the present invention.

FIG. 2 is an enlarged perspective view of a main part of the spreading device according to the embodiment.

FIG. 3 is a schematic side view of a spreading device according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Waterproof sheet 2 ... Impermeable sheet 2a ... Ground contact surface (one surface) 3 ... Buffer cloth 3a ... Side edge 10 ... Spreading device 14 ... Pressing roller 16 ... Guide claw 20 ... Tunnel 20a ... Inner wall surface 21 ... Natural ground

Claims (2)

[Claims] 1. A cushioning cloth having water permeability is formed on the ground-contacting surface of the water-impervious sheet by adhering a plurality of intermediate portions to each other, and is formed over the inner wall surface of the tunnel excavation tunnel. In the method of spreading the waterproof sheet for collecting and draining the spring water leaching from the mountain, after unwinding the waterproof sheet wound in a roll,
The both sides of the cushioning cloth of the waterproof sheet are separated from the both sides of the water-impervious sheet so as to float, and the cushioning cloth surface is pressed against the ground side by a pressing roller, and at the same time, only both side edges of the cushioning cloth are ground side. A method of spreading a waterproof sheet, characterized in that the waterproof sheet is fixed to the inner wall of the tunnel and continuously applied in the transverse direction of the inner wall surface of the tunnel. 2. A cushioning cloth having water permeability is overlapped and formed on a surface of the water-impervious sheet facing the natural ground by adhering a plurality of intermediate portions to the inner wall surface of the tunnel excavation tunnel. A device for spreading a waterproof sheet for collecting and draining spring water leaching from a mountain, comprising: a pressing roller for bringing a cushioning cloth surface of the waterproof sheet into contact with the natural ground side; A waterproof sheet spreading device comprising: a guide claw that separates and floats both side edges of the cushioning cloth of the sheet from the both side edges of the waterproof sheet.