JPH078637Y2 - Waterproof sheet suitable for heat insulation construction - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet suitable for use mainly in constructing a structure having waterproofness and cold resistance such as a tunnel.

[0002]

2. Description of the Related Art Heretofore, in this type, the following has been done. Taking the case of tunnel construction as an example, the waterproof sheet 2 constructed as shown in FIGS.
The in-situ foaming thermal insulating material 21 is applied to No. 0, and the structure for preventing the thermal insulating material from falling off is roughly as follows.
In the case of FIG. 10, before or after construction of the waterproof sheet 20, an anchor 22 having a bolt penetrating the waterproof sheet and protruding to the inside of the tunnel is fixed to the primary lining 23, and the pressure bearing plate 24 is attached after the spray heat insulating material 21 is constructed. A method of pressing and fixing the spray heat insulating material 21 on the surface of the waterproof sheet 20 by fixing with a nut 25. FIG. 11 shows a method in which the pressure support plate 24 is kept on the surface of the waterproof sheet 20, and the force of the pressure support plate, bolts, and nuts attached to the spray heat insulation material 21 or the mechanical restraining force prevents the spray heat insulation material 21 from falling off. The reason why the measures shown in FIGS. 10 and 11 are required is that the self-adhesive force of the spray insulation 21 to the waterproof sheet 20 is not sufficient to fix the spray insulation itself to the waterproof sheet surface. Is.

[0003]

The problems described in the prior art have the following problems. Since the anchor must be fixed to the blasted concrete surface, it is necessary to make a hole in the sheet to penetrate the waterproof sheet constructed on the surface of the primary lining, and this hole is waterproof by packing etc. Even if you do, it will be a weak point in waterproofing. In addition, it is also troublesome that an anchor needs to be constructed.

The present application has been made in view of the above problems of the prior art, and an object of the present application is to provide a device capable of solving the above problems.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention is as follows. That is, in the present application, the polymer-based waterproof sheet 2 mainly composed of rubber or synthetic resin or both is used as the waterproof layer,
The non-woven fabric 3 is bonded and integrated on one side of the polymer-based waterproof sheet 2, and the relatively light and thin flexible polyurethane foam 4 is bonded and integrated on the other side of the polymer-based waterproof sheet 2. It is a waterproof sheet that is suitable for existing insulation materials. In this case, a relatively light and thin woven cloth 14 can be bonded and integrated to the other surface of the polymer water impervious sheet. Further, the woven fabric 14 can be a coarse gauze.

[0006]

EXAMPLES Examples will be described with reference to the drawings. 1
Is a waterproof sheet suitable for heat insulating material construction of the present invention. A polymer-based water impermeable sheet 2 mainly composed of rubber or synthetic resin or both is used as a water impermeable layer.
The non-woven fabric 3 is adhered and integrated on one side of the above, and the relatively light and thin soft polyurethane foam 4 is adhered and integrated on the other side of the polymer-based waterproof sheet 2. 1 and 2 are cross-sectional views of the usage state, the ground 5
A primary lining 6 is constructed on the inner side of the
The waterproof sheet 1 of the present application is laminated on the
A heat insulating material 7 is sprayed on the. Further, a secondary lining 8 is applied to this heat insulating material 7. In this case, the non-woven fabric 3 forms a water-passing layer for allowing water that oozes from the natural ground 5 through the primary lining 6 to escape to the end of a predetermined waterproof work flow.

The flexible polyurethane foam 4 is for increasing the adhesive force of the heat insulating material when sprayed with the heat insulating material 7 so that the flexible polyurethane foam 4 can stand and be fixed on the waterproof sheet only by the self adhesive force of the heat insulating material. The flexible polyurethane foam 4 is bonded and integrated with the polymer-based waterproof sheet 2 as described above. In this case, referring to FIG. 4, a known anchor 9 can be used. That is, after the waterproof sheet 1 is stretched, the waterproof sheet 1 is penetrated, the anchor 9 is planted in the primary lining 6, and the known packing 9C, washer 9D, and nut 9E are attached. In the figure, 9A is an anchor portion, 9B is a bolt portion, and 9B1 is a bolt tip portion. A heat insulating material 7 and a secondary lining 8 are installed on the inner air side of the waterproof sheet 1 thus configured.

In this way, the anchor 9 is used
This is a case where it is necessary to install a reinforcing bar (not shown) inside the secondary lining 8. Then, the reinforcing bar or the like is connected to the bolt tip portion 9B1 of the bolt portion 9B. In this case, it is unavoidable that a through hole for a bolt needs to be formed in the waterproof sheet 1, and as a result, a through hole for a bolt is also formed in the flexible polyurethane foam 4. In such a case, referring to FIG. 4, a portion near the bolt through hole 4A, that is, the portion 4A to which the packing 9C is closely attached is impregnated beforehand with a permeation-type waterproofing agent such as an oil-based or synthetic resin-based stopper. Can be watered.

Referring to FIGS. 5 and 6, reference numeral 11 denotes a waterproof sheet suitable for applying a heat insulating material in another embodiment. A polymer-based waterproof sheet 12 mainly composed of rubber or synthetic resin or both is used as a waterproof layer, and a nonwoven fabric 13 is adhered to one side of the polymer-based waterproof sheet 12 to be integrated with the polymer-based waterproof sheet 12. A relatively light and thin woven cloth 14 is bonded and integrally formed on the other surface of the water shield sheet 12. A primary lining 16 is constructed on the inner side of the natural ground 15, and the primary lining 1
A waterproof sheet 11 of the present application is laminated on 6, and a heat insulating material 17 is sprayed on the waterproof sheet 11. Further, a secondary lining 18 is applied to the heat insulating material 17.

The non-woven fabric 13 is formed from the ground 15 to the primary lining 16
It forms a water-permeable layer for allowing the water bleeding through to escape to the end of a predetermined waterproof work. In this case, the relatively light and thin woven fabric 14 is a relatively light and thin and coarse woven fabric such as coarse woven cloth, and when the heat insulating material 17 is sprayed on this surface, the adhesive force of the heat insulating material is It is intended to be raised and to be self-supporting and fixed on the waterproof sheet 11 only by the self-adhesive force of the heat insulating material, and the relatively light and thin woven cloth 14 is integrally bonded to the polymer-based waterproof sheet 12 as described above. Has been done. 14 in the figure
A is a yarn that constitutes a relatively light and thin woven fabric, and 14B is an opening between the yarns.

Since the comparatively light and thin woven cloth 14 has the opening 14B formed in the portion of the mesh between the threads 14A and 14A, when the packing 19C or the like is pressure-bonded, the packing is protected from water. It does not prevent the adhesion to the layer. In addition, since the relatively light and thin woven fabric 14 forms a regular lattice pattern on the surface of the water blocking layer of the polymer water blocking sheet 12, after applying the waterproof sheet 11 of the present invention to the surface of the primary lining, It also has the effect of making it easier to find out if holes or scratches occur in the waterproof sheet due to some construction reasons.
In this case, referring to FIGS. 8 and 9, the known anchor 19
Can be used. That is, after the waterproof sheet 11 is stretched, an anchor 19 is planted in the primary lining 16 by penetrating the waterproof sheet 11, and the known packing 19
Mount C, washer 19D, and nut 19E. 19 in the figure
A is an anchor portion, 19B is a bolt portion, and 19B1 is a bolt tip portion.

A heat insulating material 17 and a secondary lining 18 are provided on the inner air side of the waterproof sheet 11 thus constructed. Thus, the anchor 19 is used when it is necessary to install a reinforcing bar (not shown) or the like inside the secondary lining 18. Then, the reinforcing bar or the like is connected to the bolt tip portion 19B1 of the bolt portion 19B. In this case, it is unavoidable that the through holes for bolts must be formed in the waterproof sheet 11, and as a result, the through holes for bolts are also formed in the relatively light and thin woven cloth 14. In such a case, referring to FIG. 8, for the concern that water may exude through the thread 14A of the relatively light and thin woven cloth 14 through the packing 19C, Thread 1 located in the vicinity of the through hole, that is, in the portion 14A1 where the packing closely contacts
This can be solved by preliminarily impregnating 4A with a permeation type waterproofing agent such as an oily or synthetic resin type.

The waterproof sheets 1 and 11 of the present invention are for the construction of a highly waterproof structure, and basically, the waterproof sheet is basically provided with a hole penetrating the polymer-based waterproof sheet as much as possible. It is considered that it is desirable not to have it, and both sides of the waterproof sheet are structured so that the waterproof sheet can be fixed to the primary lining surface with pins or the like without penetrating the polymeric water blocking sheet. Examples of the relatively light and thin flexible polyurethane foam 4 include Achilles Co., Ltd.-trademark OD. Examples of the relatively light and thin woven fabric 14 include Kuraray Co., Ltd.-Trademark Cremona Kansa # 120.

The operation will be described together with the effect.

[0015]

Since the present invention is constructed as described above, it has the following effects. 1. The quality is uniform because it is a waterproof sheet manufactured at the factory. 2. The adhesiveness between the heat insulating material and the waterproof sheet can be improved. 3. Even if it is unavoidable that a hole is made in the waterproof sheet, even if water is stopped at the relevant part with packing etc., the water stopping effect will not be impeded. 4. In particular, in the waterproof sheet 11, if the waterproof sheet is damaged due to some reason in construction, it can be easily found. As is apparent from the above, if the one of the present application is used, it is possible to reduce the process that conventionally required a great amount of work of fixing the heat insulating material when the heat insulating material is applied on the waterproof sheet, and the work process and the work cost at the site, And the construction period can be greatly reduced.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a main part of a tunnel constructed using the waterproof sheet of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the above.

FIG. 3 is a perspective view in which a part of the waterproof sheet is cut away.

FIG. 4 is a perspective view with a part cut away showing a mounting state of a waterproof sheet.

FIG. 5 is an enlarged cross-sectional view of a main part of a tunnel constructed using the waterproof sheet of another embodiment.

FIG. 6 is an enlarged sectional view of a main part of the above.

FIG. 7 is a perspective view in which a part of a waterproof sheet of another embodiment is cut away.

FIG. 8 is a perspective view with a part cut away showing a mounting state of a waterproof sheet.

FIG. 9 is an exploded perspective view of the above.

FIG. 10 is a cross-sectional view illustrating a conventional heat insulating material falling prevention structure.

FIG. 11 is a cross-sectional view illustrating a conventional fall-off preventing structure for a heat insulating material.

[Explanation of symbols]

 1 Waterproof sheet suitable for insulation material 2 Polymeric water impermeable sheet 3 Nonwoven fabric 4 Soft polyurethane foam 5 Ground 6 Primary lining 7 Insulation material 8 Secondary lining 9 Anchor 11 Waterproof sheet suitable for insulation material 12 High Molecular water impervious sheet 13 Nonwoven fabric 14 Woven fabric 14A Yarn forming the woven fabric 14B Opening between yarns 15 Natural ground 16 Primary lining 17 Thermal insulation 18 Secondary lining 19 Anchor

Claims (3)

[Scope of utility model registration request] 1. A polymer-based waterproof sheet (2) mainly comprising rubber or synthetic resin, or both, as a waterproof layer,
A non-woven fabric (3) is adhered to and integrated with one surface of the polymer water-impermeable sheet (2), and a relatively light and thin soft polyurethane foam (on the other surface of the polymer water-impermeable sheet (2) ( A waterproof sheet suitable for construction of a heat insulating material, which is formed by integrally bonding 4). 2. A waterproof sheet suitable for applying a heat insulating material according to claim 1, wherein a relatively light and thin woven cloth (14) is integrally formed on one side of the other side of the polymer water impervious sheet. 3. A waterproof sheet suitable for applying a heat insulating material according to claim 2, wherein the woven cloth (14) is a coarse gauze cloth.