JP2818910B2 - Tunnel tarpaulin construction method - 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 constructing a waterproof sheet for a tunnel, and more particularly, to a method for heat-sealing a heat-sealable waterproof sheet as a waterproofing work using a heat-sealable disc on the primary lining surface of the tunnel. The present invention relates to a method for constructing a waterproofing sheet for a tunnel and a method for constructing a waterproofing sheet for a tunnel having a specification in which a heat-sealing repairable waterproofing sheet is heat-welded to a damaged portion of the heat-sealing waterproofing sheet stretched on a primary lining surface of the tunnel.

[0002]

2. Description of the Related Art Conventionally, as a method of installing a waterproof sheet for a tunnel with such specifications, a waterproof sheet such as a heat-sealable disc on a primary lining surface of a tunnel, and a waterproof sheet to be thermally welded thereto. Is melted by hot air or an electric heating iron, and a waterproofing sheet is stretched by pressing the waterproofing sheet against a waterproof sheet mounting object such as a disc. The welding of the waterproof sheet by hot air is sufficient for the heating of the waterproof sheet itself, but hot air is often blown to the waterproof sheet beyond the area to be welded. For this reason, an unnecessary portion of the waterproof sheet is heated and melted, and the portion may be hung down and stretched by the sheet weight to be thin or damaged. In the welding of the waterproof sheet with an electric heating iron, the waterproof sheet in an extra wide area is not thermally melted as much as hot air, but the waterproof sheet is insufficiently heated, which often results in poor welding.

[0003]

The problem to be solved is the above-mentioned problem of the prior art.

[0004] That is, an object of the present invention is to be able to heat-melt a waterproof sheet in a minimum necessary area, so that it is possible to avoid hanging and thinning and breakage due to the weight of the waterproof sheet, and to sufficiently and well heat the waterproof sheet. To ensure good welding.

Still another object of the present invention is to make it possible to perform welding of a waterproof sheet significantly more efficiently than the conventional method.

[0006]

In order to achieve the above-mentioned object, the present invention applies a heating wire to a required surface of a heat-sealable disc on a primary lining surface of a tunnel, and attaches a heat-sealable waterproof sheet thereon. The specification of pressing the waterproofing sheet against the disc, and applying a heating wire to a partially damaged portion of the heat-sealable waterproofing sheet stretched on the primary lining surface of the tunnel, with the intervention of the heating wire, The heat-sealing waterproof sheet for repair is stacked, the heating wire is energized, and the latter is pressed against the former waterproof sheet.

[0007]

As described above, according to the present invention, the heat-sealing waterproof sheet stretched between the heat-welding disk on the primary lining surface of the tunnel and the heat-sealing waterproof sheet superposed thereon, or on the primary lining surface of the tunnel. Under the specification that a heating wire is interposed between the partially damaged portion and the repairable heat-sealing waterproof sheet superimposed thereon and energized, a heat-sealing disc and a waterproof sheet or an already-installed waterproof sheet and Since the repair waterproofing sheet is heated, the waterproofing sheet can be heat-welded in a minimum necessary area. In addition, the heating value of the heating wire and / or the energizing time are appropriately set in design, so that the waterproof sheet can be heated sufficiently and successfully.

[0008] Thus, according to the present invention, it is possible to avoid hanging and thinning and breakage due to the weight of the waterproof sheet, and it is ensured that the waterproof sheet is well welded.

Furthermore, in the present invention, the heating wire is interposed between the heat-weldable disc and the waterproof sheet to be constructed, or between the already-installed waterproof sheet and the repair waterproof sheet, that is, in a state where the heating wire is sandwiched therebetween. In order to generate heat, the waterproof sheet to be applied to the disc or the already applied waterproof sheet and the repair waterproof sheet can be simultaneously heated and melted. Therefore, the welding of the waterproof sheet can be achieved significantly more efficiently than the conventional method.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing a waterproof sheet construction procedure of the present invention. FIG. 2 is a cross-sectional view showing a procedure for installing a repair waterproof sheet at a damaged portion of the already installed waterproof sheet according to the present invention. FIG. 3 is a view showing an example of a power supply device for a heating wire for a heat-sealable disc to be attached to a primary lining surface of a tunnel at a portion corresponding to a region which is not near the edge of a waterproof sheet according to the present invention, and FIG. FIG. 5 is an exemplary view of a power supply tool for a heating wire for a heat-sealable disc attached to a primary lining surface of a tunnel at a portion corresponding to a region near an edge of a sheet.

Reference numeral 1 denotes a heat-weldable disc as an object to be attached to a waterproof sheet. The heat-weldable disc 1 may be attached to the primary lining surface 3 of the tunnel by a method known per se, for example, by nailing.

In the area where the disc 1 is not near the end of the heat-sealing waterproof sheet 4 to be heat-welded thereto, that is, in the area corresponding to the area that the waterproof sheet construction worker cannot reach, the primary lining surface of the tunnel is 3 can be attached to the surface of the disc 1 where the waterproof sheet 4 is to be heat-welded.
Prior to the installation of the waterproof sheet 4, the heating wire 5 is attached before or after the disc 1 is attached to the primary lining surface 3 of the tunnel. To attach the heating wire 5 to the disc 1,
Adhesion with an adhesive or an adhesive tape can be advantageously applied. The heating wire 5 may be mounted on the disc 1 in a state of being buried about half.

When the disc 1 is attached to the primary lining surface 3 of the tunnel at a position near the end of the heat-sealing waterproof sheet 4 to be heat-welded to the end, that is, in an area accessible to a waterproof sheet construction worker, A required end of the heating wire 5 is sandwiched between clip-type power supply terminals 7 and 7 of a hand-held power supply 6 as shown in FIG. 4, and the heating wire 5 is held on the primary lining surface 3 of the tunnel when the power supply 6 is needed. What is necessary is just to apply to the required surface of the disc 1. Alternatively, the heating wire 5 is attached to the disc 1 in the same manner as described above with respect to the disc 1 arranged on the primary lining surface 3 of the tunnel corresponding to a region other than the end portion of the waterproof sheet 4 before the waterproof sheet is applied. You may.

A heat-sealing waterproof sheet 4 is overlaid on the heating wire 5 attached to or applied to the disc 1 on the primary lining surface 3 of the tunnel, and an electric current flows through the heating wire 5. Energization is
In the case where the disc 1 is disposed at a position corresponding to a region which is not near the end of the waterproof sheet 4, it may be performed by the power supply device 8 as shown in FIG. In FIG. 3, 9 is a clip type power supply terminal, 10 is a resistor inserted into the circuit 11 of the terminal 9,
Reference numeral 12 denotes a timer, and 13 denotes a switch. Disc 1
Is disposed at a portion corresponding to the partial area from the end of the waterproof sheet 4, the heating wire 5 thereof may be energized by applying the power supply 6. In FIG. 4, 10 is a terminal (7).
The resistor of the circuit (7) (not shown), 12 is a timer, 1
3 is a switch. Reference numeral 14 denotes an operation handle of the movable terminal, and reference numeral 15 denotes a grip of the power supply device 6.

Thus, the disc 1 and the waterproof sheet 5 superposed on the heating wire 5 are melted by the heating wire 5. Therefore, the waterproof sheet 4 can be thermally welded to the disc 1 by pressing the waterproof sheet 4 against the disc 1. The energization of the heating wire 5 may be stopped at an appropriate time.

The control of stopping the supply of electricity to the heating wire 5 is controlled by the time set by the timer 12, and the control of the amount of generated heat is preferably performed by a variable resistor rather than the resistor 10.

After heat-sealing the waterproof sheet 4, the heating wire 5
From the power supply terminals 7, 7 or 8, 8. Waterproof sheet 4
For the heating wire 5 of the disc 1 located at a portion corresponding to a region other than the end portion of the above, the circuit 11 may be pulled to remove the power supply terminals 9 and 9. The heating wire 5 of the disc 1 at a position corresponding to the area near the end of the waterproof sheet 4 may be removed according to the specifications known per se for the power supply terminals 7, 7 of the hand-held power supply 6.

The embodiment described above relates to the construction of the waterproof sheet on the primary lining surface of the tunnel.

An embodiment of a method for applying a repairable heat-sealing waterproof sheet to the heat-sealing waterproof sheet stretched on the primary lining surface of the tunnel will be described below.

In the embodiment of the repairing heat-sealing waterproof sheet, the heating wire 50 is connected to a partially damaged portion 41 of the heat-sealing waterproof sheet 40 as an object to which the waterproof sheet is attached, which is stretched on the primary lining surface 3 of the tunnel. This is substantially the same as the above-described example of the construction of the waterproof sheet on the primary lining surface of the tunnel, except that the repairable heat-sealing waterproof sheet 42 is overlapped with the interposition of the repair sheet.

In order to interpose the heating wire 50 between the waterproof sheets 40 and 42, the same specification as described in the previous embodiment may be used.

[0022]

As described above, according to the present invention, the waterproof sheet can be prevented from sagging and thinning due to the weight of the waterproof sheet, good welding of the waterproof sheet is guaranteed, and the waterproof sheet is significantly more efficient than the conventional method. Has the effect of achieving welding.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a waterproof sheet construction procedure of the present invention.

FIG. 2 is a cross-sectional view showing a procedure for applying a repair waterproof sheet to a damaged portion of an already installed waterproof sheet according to the present invention.

FIG. 3 is an elevation view illustrating a power supply device for a heating wire used in the present invention.

FIG. 4 is a perspective view illustrating a hand-held power supply for a heating wire used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat welding disc 2 Nail 3 Tunnel primary lining surface 4 Heat welding waterproof sheet 5 Heating wire 6 Power supply device 7 Clip type power supply terminal 8 Power supply device 9 Clip type power supply terminal 10 Resistor 12 Timer 13 Switch 40 Heat weldable waterproof sheet 41 Damaged part 42 Repairable heat-sealable waterproof sheet 50 Heating wire

Claims (3)

(57) [Claims] 1. A heat-sealable disc is attached to a primary lining surface of a tunnel, a heating wire is applied to a surface of the disc to which a heat-sealable waterproof sheet is to be welded, and a heat-sealable waterproof sheet is further laminated thereon. A method for constructing a waterproof sheet for a tunnel, comprising supplying electricity to a heating wire and pressing the waterproof sheet against the disc. 2. A heat-sealable disc having a heating wire attached to a surface on which the heat-sealable waterproof sheet is to be welded is attached to the primary lining surface of the tunnel, and the heat-sealable waterproof sheet is overlaid on the heating wire of the disc. A method for constructing a waterproof sheet for a tunnel, comprising supplying electricity to a heating wire and pressing the waterproof sheet against the disc. 3. A partly damaged portion of the heat-sealing waterproof sheet stretched on the primary lining surface of the tunnel is heated by a heating wire.
A method for constructing a tunnel waterproofing sheet, characterized by stacking a heat-sealing waterproofing sheet for repair, energizing a heating wire, and pressing the latter against the former.