JPH06105039B2 - Tunnel waterproof sheet 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 of applying a waterproof sheet for a tunnel, and more specifically, a method of applying a heat-welding waterproof sheet as a waterproofing tool by using a heat-welding disc on the primary lining surface of the tunnel. The present invention relates to a method for applying a waterproof sheet for a tunnel, and a method for applying a waterproof sheet for repair which is heat-welding to a damaged portion of the heat-welding waterproof sheet stretched over the primary lining surface of the tunnel.

[0002]

2. Description of the Related Art Conventionally, as a method of constructing a waterproof sheet for a tunnel with such specifications, a waterproof sheet-attached object such as a heat-welding disc on the primary lining surface of the tunnel, and a waterproof sheet to be heat-welded thereto There is known a construction method in which the waterproof sheet is melted by hot air or an electric heating iron and the waterproof sheet is pressed against an object to which the waterproof sheet is attached, such as a disc, to stretch the sheet. The welding of the waterproof sheet with hot air is sufficient for heating the waterproof sheet itself, but hot air is often blown to the waterproof sheet beyond the region to be welded. Therefore, the waterproof sheet of an unnecessary portion may be melted by heat, and the portion may be drooped by the weight of the sheet to be thinned or damaged. The welding of the waterproof sheet with an electric heating iron does not heat-melt an excessively large area of the waterproof sheet as much as hot air does, but the heating of the waterproof sheet tends to be insufficient, which often results in poor welding.

[0003]

A problem to be solved by the invention is that the waterproof sheet can be heat-melted in the minimum necessary area, so that it is possible to avoid the drooping stretch thinning and damage due to the weight of the waterproof sheet, and to prevent waterproofing. It is in the development of ensuring that the sheet can be heated well and well and ensures good welding.

Still another object of the present invention is to ensure good welding for a waterproof sheet for a tunnel arch portion.

[0005]

In order to solve the above-mentioned problems, the present invention is directed to a required surface of a heat-welding disc on a primary lining surface of a tunnel, the extending mode of which is the direction around the center of the disc. Alternatively, a heating wire having a zigzag shape in the diameter direction is applied or attached, a heat-welding waterproof sheet is overlaid thereon, the heating wire is energized, and the waterproof sheet is pressed against the disc, and the primary covering of the tunnel. The heat-sealing waterproof sheet stretched over the work surface is covered with a heat-sealing waterproof sheet for repair under the presence of a heating wire whose extension mode is similar to the above, and the heat-sealing waterproof sheet is energized and the former waterproofing is applied. The feature is that the latter tarpaulin is pressed against the seat.

[0006]

As described above, according to the present invention, the heat-sealing waterproof sheet stretched between the heat-welding disc on the tunnel primary lining surface and the heat-sealing waterproof sheet superposed on it, or on the tunnel primary lining surface. Under the specifications that a heating wire is interposed between the partially damaged part of the heat-sealing waterproof sheet and the heat-sealing waterproof sheet for repair, which is energized, the heat-welding disc and the waterproof sheet or the existing waterproof sheet and Since the repair waterproof sheet is heated, the waterproof sheet can be heat-welded in the minimum necessary area. Further, the heat generation amount of the heating wire and / or the energization time can be set appropriately by design, and the waterproof sheet can be sufficiently and satisfactorily heated.

As described above, according to the present invention, it is possible to avoid the drooping stretch thinning and the breakage due to the weight of the waterproof sheet, and to ensure the good welding of the waterproof sheet.

Further, in the present invention, the heating wire extending between the heat-welding disc on the primary lining surface of the tunnel and the waterproof sheet to be constructed or between the existing waterproof sheet and the waterproof sheet for repair is extended. For the surface of the portion where the heating wire interposes the heating wire, a zigzag shape in the direction around the center of the disk or the diameter direction is applied, so that the heating wire is used as described below. Although the heat-sealing of the waterproof sheet of (1) is performed linearly, that is, although the peeling strength is weak, good welding is guaranteed even for the waterproof sheet of the tunnel arch portion.

When the heat-welding disc or the heat-sealing waterproof sheet and the heat-sealing waterproof sheet are heat-welded under the presence of a heating wire, the fact that the heat-welding is actually successful means that the two to be heat-welded do not interfere with each other. It is about the linear portion of the contacting boundary surface adjacent to the heating wire. Regarding the peripheral surface of the heating wire corresponding to other parts, although the disk or sheet at that part is melted by heat, it is isolated by the heating wire, that is, it does not function as a welding material due to heat melting under mutual contact. Not heat welded.

The above-mentioned extending mode of the heating wire according to the present invention is such that the heating wire extends in the radial direction of the heat-welding disc or the surface of the portion corresponding thereto or in the direction corresponding to the radius of the disc. Covers a wide area. In other words, the heat-sealing line of the waterproof sheet for the heating wire according to the present invention is mostly in the direction of the disc radial direction or a direction corresponding thereto. The direction of the heat-sealing line of the waterproof sheet is
It is convenient in that the load is applied to the waterproof sheet in the radial direction of the disk or in a direction corresponding to the disk due to the weight. That is, the direction of the welding line is useful in that at least several of the welding lines simultaneously and linearly perform a peeling resistance function with respect to the sagging due to the weight of the waterproof sheet, and good peeling resistance can be obtained.

Therefore, according to the present invention, the welding of the waterproof sheet of the tunnel arch portion with the heating wire is also ensured.

[0012]

Embodiments of the present invention will now be described with reference to the accompanying drawings. FIG. 1 is a 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 repairing waterproof sheet to a damaged portion of an existing waterproof sheet according to the present invention. FIG. 3 is a view showing an example of a power feeding device for a heating wire for a heat-welding disc mounted on a tunnel primary lining surface in a region corresponding to a region other than the end portion of the waterproof sheet in the method of the present invention, FIGS. 3 is an exemplary view of a heating wire extending mode different from that shown in FIG. 3, and FIG. 6 is a heating wire for a heat-welding disc to be attached to the tunnel primary lining surface at a portion corresponding to an end portion region of the waterproof sheet. It is an illustration figure of the electric power feeding implement with respect to.

Reference numeral 1 denotes a heat-welding disc as an object to which the waterproof sheet is attached. The heat-welding disc 1 may be attached to the tunnel primary lining surface 3 by a method known per se, for example, by nailing. Reference numeral 4 denotes a heat-welding waterproof sheet.

Reference numeral 5 is a heating wire, and the heating wire 5 extends in a manner such that the disk 1 or the waterproof sheet 4 has a welded surface.
A zigzag shape as shown in FIG. 3 in the direction around the center of the surface, or a zigzag shape as shown in FIG. 4 or 5 in the diametrical direction, or a substantially similar extension. Aspects of the embodiment are applicable.

In the area where the disk 1 is not near the edge of the heat-welding waterproof sheet 4 to be heat-welded to the disk 1, that is, the area which is out of reach of the waterproof sheet construction worker, the tunnel primary lining surface is formed. 3 is attached to the surface of the disc 1 to which the waterproof sheet 4 is to be heat-welded,
Prior to the construction of the waterproof sheet 4, the heating wire 5 is attached before or after the disc 1 is attached to the tunnel primary lining surface 3. To attach the heating wire 5 to the disc 1,
Adhesion or sticking with an adhesive tape can be advantageously applied. About half of the heating wire 5 may be embedded in the disc 1 in a buried state. The half-filling of the heating wire 5 in the disk 1 can be advantageously applied by a method of energizing the heating wire 5.

When the disk 1 is attached to the tunnel primary lining surface 3 at a portion near the edge of the heat-sealing waterproof sheet 4 to be heat-welded to the disk 1, that is, in an area within reach of a worker who carries out the waterproof sheet construction, The required end of the heating wire 5 is sandwiched between the clip type power supply terminals 7 and 7 of the handheld power supply tool 6 as shown in FIG. 6, and the heating wire 5 is held on the tunnel primary lining surface 3 when necessary by holding the power supply tool 6. It may be applied to the required surface of the disk 1. Alternatively, in the same manner as described above with respect to the disk 1 arranged on the tunnel primary lining surface 3 in the area corresponding to the area other than the end portion of the waterproof sheet 4, the heating wire 5 is attached to the disk 1 before the waterproof sheet is installed in the same manner as described above. May be.

A heat-welding waterproof sheet 4 is overlaid on the heating wire 5 attached to or applied to the disc 1 on the tunnel primary lining surface 3 and an electric current is passed through the heating wire 5. Energization is
When the disk 1 is disposed at a position corresponding to a region that is not near the end of the waterproof sheet 4, the power supply device 8 as shown in FIG. 3 may be used. In FIG. 3, 9 is a clip type power supply terminal, 10 is a resistor inserted in the circuit 11 of the terminal 9,
Reference numeral 12 is a timer, and 13 is a switch. Disc 1
Is disposed at a position corresponding to the end portion of the waterproof sheet 4, the heating wire 5 may be energized by applying the power supply tool 6. In FIG. 6, 10 is a terminal (7)
Resistor of circuit (7) (not shown), 12 is timer, 1
3 is a switch. Reference numeral 14 is an operation handle of the movable side terminal, and 15 is a grip portion of the power supply tool 6.

In this way, the waterproof sheet 5 laminated on the disc 1 and the heating wire 5 of the disc 1 is heat-melted by the heating wire 5. Therefore, the waterproof sheet 4 can be heat-welded to the disk 1 by pressing the waterproof sheet 4 against the disk 1. Energization of the heating wire 5 may be stopped at an appropriate time.

The control of stopping the energization of the heating wire 5 may be performed by the set time of the timer 12, and the heat generation amount may be controlled by the variable resistor rather than the resistor 10.

After heat-sealing the waterproof sheet 4, the heating wire 5
Remove the power supply terminals 7, 7 or 9, 9. Tarpaulin 4
Regarding the heating wire 5 of the disk 1 located in a region corresponding to a region other than the end portion, the circuit 11 may be pulled to remove the power supply terminals 9 and 9. The heating wire 5 of the disc 1 located at a portion corresponding to the end portion of the waterproof sheet 4 may be removed by a known specification for the power supply terminals 7 of the handheld power supply tool 6.

The above-described embodiment (FIG. 1) relates to the construction of the waterproof sheet on the tunnel primary lining surface.

An example of a method of applying a repairing heat-sealing waterproof sheet to the heat-sealing waterproof sheet stretched over the tunnel primary lining surface will be described below.

In the embodiment of the construction of the heat-welding waterproof sheet for repair (FIG. 2), the heat-welding waterproof sheet 4 as an object to which the waterproof sheet is attached is stretched over the primary lining surface 3 of the tunnel.
It is substantially the same as the above-mentioned example of the embodiment of the waterproof sheet for the primary tunnel lining surface except that the repairing heat-welding waterproof sheet 42 is superposed on the partially damaged portion 41 of 0 under the heating wire 50.

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

In the construction of the waterproof sheet according to any of the embodiments, the heating wire 5 is interposed between the two objects to be welded.
Is a specific aspect described above, whereby at least some of the welding lines of the object have a peeling-resistant function simultaneously and linearly with respect to the sagging due to the weight of the waterproof sheet 4 or 40. Contribute.

[0026]

As described above, according to the present invention, it is possible to avoid the drooping and thinning of the waterproof sheet due to the weight of the waterproof sheet, to avoid damage, to ensure good welding of the waterproof sheet, and to ensure good welding of the tunnel arch. There is an effect that can be applied to the waterproof sheet of the part.

[Brief description of 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 repairing waterproof sheet to a damaged portion of an existing 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 plan view showing a modification of the extension mode of the heating wire according to the present invention.

FIG. 5 is a plan view showing another modification example of the extension mode of the heating wire according to the present invention.

FIG. 6 is a perspective view illustrating a handheld power supply tool 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-welding waterproof sheet 41 Damaged part 42 Thermal welding waterproof sheet for repair 50 Heating wire

Claims (3)

[Claims] 1. A heat-welding disc is attached to a primary lining surface of a tunnel, and a surface of the disc to which a heat-sealing waterproof sheet is to be welded has an extension mode corresponding to the surface or a direction around the center of the disc. A tunnel waterproof sheet construction method characterized in that a heating wire having a zigzag shape is applied in the diameter direction, a heat-welding waterproof sheet is further stacked on the heating wire, the heating wire is energized, and the waterproof sheet is pressed against the disc. . 2. A surface to which a heat-sealing waterproof sheet is to be welded,
A heat-weldable disc with a heating wire in a zigzag shape is attached to the primary lining surface of the tunnel in a direction around the center or in the diametrical direction, and the heat-welding property is applied from above the heating wire of the disc. A method for constructing a waterproof sheet for a tunnel, comprising stacking waterproof sheets, energizing a heating wire, and pressing the waterproof sheet against the disc. 3. The heat-welding waterproof sheet stretched on the primary lining surface of the tunnel has a partially damaged portion whose extension mode is a zigzag shape around the center of the sheet surface or in the diametrical direction. A method for constructing a waterproof sheet for a tunnel, characterized in that a heat-welding waterproof sheet for repair is superposed under the intermediary of a heating wire, and the heating wire is energized, and the latter waterproof sheet is pressed against the former waterproof sheet.