JP4096074B2 - Tarpaulin - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention drills from the ground, and the hole is formed on the surface of the underground continuous wall, especially the underground continuous wall with spring water, formed by cementing with cementitious materials, chemicals, steel, etc. spring water together with allowed to fall by Tsutawa steric meshwork of adhesion with post-deposited concrete is good and moreover it relates to a waterproof sheet that can also prevent the penetration of water into post-deposited concrete surface.
[0002]
[Prior art]
For underground continuous wall with spring water, conventionally, water stop treatment and vinyl pipe etc. are used together, or synthetic resin sheet or non-woven fabric such as polyethylene is pasted on continuous wall, water is introduced, solid network and waterproof sheet The use of a waterproof sheet with a three-dimensional network that combines the above (Japanese Patent Laid-Open No. 63-315800, Japanese Patent Laid-Open No. 1-1111999) has been implemented.
[0003]
[Problems to be solved by the invention]
However, the water guiding method using the water stop treatment and the vinyl pipe or the like is problematic in that it takes a lot of work, and the method of attaching a synthetic resin sheet such as polyethylene is another material such as a synthetic resin sheet, for example, When the waterproof material is applied, there is a disadvantage that the adhesive strength with the synthetic resin sheet is small and the integration is not good, and when the nonwoven fabric is pasted, there is a disadvantage that water tends to accumulate on the back surface. Furthermore, when using a waterproof sheet with a three-dimensional network, there is a drawback in that a seam is formed between the sheets, and thus the continuity of the waterproof layer is impaired.
[0004]
In view of the above, the present invention enables waterproof construction to the spring surface on the continuous underground wall surface, has good adhesion to the post-cast concrete surface, and can also prevent penetration of the ground water into the concrete surface. The object is to provide a waterproof sheet .
[0005]
[Means for Solving the Problems]
That is, the invention according to claim 1 of the waterproof sheet of the present invention is a three-dimensional network body in which a large number of linear bodies intersect each other and at least a part of the intersections are adhered to each other to form undulating irregularities. and laminated on impermeable film layer pasted on one side of the nonwoven fabric, together with a part of the mesh body is fused to the impermeable film layer was stuck on one side of the nonwoven fabric, the A waterproof layer is formed on the other side of the nonwoven fabric.
[0006]
Further, the invention according to claim 2 is characterized in that a three-dimensional network body in which a plurality of linear bodies intersect each other and at least a part of the intersections are adhered to each other to form undulations is formed on the inside. It is laminated on one side of a nonwoven fabric with a film layer interposed therebetween, and a waterproof layer is formed on the other side of the nonwoven fabric while being fused to the nonwoven fabric at a part of the network.
[0008]
In the first and second aspects , the waterproof layer is formed using a waterproof material in which a synthetic resin emulsion is mixed with a hydraulic inorganic material, an aggregate, or a transition metal hydroxide, and has no hydraulic property. It is characterized by using cement-based aggregate such as lime aluminate as the equipment.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In short, the waterproof sheet of the present invention has a structure in which a three-dimensional network is fused on one side of a nonwoven fabric and a waterproof layer is formed on the other side, and the three-dimensional network of this waterproof sheet is formed on a continuous wall of an underground structure. It is characterized in that the spring water from the underground continuous wall surface is dropped down along the three-dimensional network, guided to the side channel of the gutter provided at the bottom of the continuous wall surface, and discharged to the outside by pasting it in contact To do.
[0012]
Further, post-cast concrete is applied to the inside of the waterproof sheet, but the waterproof layer formed on the inner surface of the waterproof sheet has good adhesion to the concrete. In addition, this waterproof layer is more closely adhered to concrete by using a hydrophilic emulsion such as ethylene-vinyl acetate copolymer as the synthetic resin emulsion that is the main material of the waterproof material used to form the waterproof layer. The nature increases. Moreover, since this waterproof layer has the property of absorbing water and swelling, if groundwater penetrates the nonwoven fabric layer of the waterproof sheet and contacts the waterproof layer, the waterproof layer is damaged by cracks in the concrete frame, etc. However, due to the above-described characteristics, the permeated water is blocked to prevent the water from entering into the post-cast concrete.
[0013]
In addition to the waterproof sheet having the structure described above, which is used by sticking to the continuous wall of the underground structure, a non-woven fabric having a three-dimensional network fused on one side is attached to the continuous wall of the underground structure on the three-dimensional network surface, There is also a waterproofing method in which a waterproof layer is then formed on the other surface (inner surface) side of the nonwoven fabric .
[0014]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a waterproof sheet according to the present invention. The waterproof sheet 1 has a three-dimensional network 3 having undulations formed on one side of a nonwoven fabric 2 by crossing a large number of linear bodies. The layers are laminated by fusion bonding, and the waterproof layer 4 is formed on the other surface side.
[0015]
In the waterproof sheet 1, as shown in FIG. 4, the three-dimensional network 3 has a wavy unevenness extending in the horizontal direction and the thickness direction by a large number of linear bodies 3a intersecting each other and fused at their intersections 3b. When such a non-woven fabric is bonded to the continuous wall surface of the underground structure, the three-dimensional network body 3 comes into contact with the continuous wall surface of the underground structure, and spring water causes the three-dimensional network body 3 to It goes down and falls down.
[0016]
FIG. 2 shows the structure of another example of the waterproof sheet according to the present invention. The three-dimensional network 3 is laminated on the water-impermeable film layer 5 laminated on one side of the nonwoven fabric 2 by fusion bonding. A waterproof layer is formed on the other side, and this allows the spring water to fall along the three-dimensional network without wetting the nonwoven fabric surface.
[0017]
FIG. 3 shows still another example of the waterproof sheet according to the present invention, in which a water-impermeable film layer 5 is interposed inside the nonwoven fabric 2, and the spring water falls along the three-dimensional network 3. Even when the surface of the nonwoven fabric is wetted, the water-impermeable film layer 5 exhibits a water shielding function and can prevent penetration into the deep portion of the nonwoven fabric layer 2 (side closer to the waterproof layer 4).
[0018]
In this invention, as the nonwoven fabric, a corrosive-resistant natural fiber such as palm fiber or palm, or a synthetic fiber such as polyethylene, polypropylene, polyester, polyamide, or a fiber composed of a mixture thereof is spread in a sheet shape, and then a needle punch or the like. Those reinforced by the method or those obtained by the spunbond method are used.
[0019]
Moreover, what is necessary is just to use synthetic resin films, such as a polyethylene film and a polypropylene film, or metal films, such as aluminum, as a water-impermeable film bonded on the one surface side of such a nonwoven fabric, or to interpose inside.
[0020]
The three-dimensional network 3 shown in FIG. 4 described above intersects a large number of linear bodies 3a such as synthetic resin fine wires such as polyamide, polyester, polyethylene, and polypropylene, and metal wires covered with a synthetic resin such as polyvinyl chloride. However, the undulations are formed by irregularly changing the direction in the horizontal direction and in the thickness direction and bonding them to each other at a large number of intersections 3b of the linear bodies 3. The thickness of the linear body 3a constituting such a three-dimensional network is preferably 0.5 to 3 mm, the mesh size of the network 3 is 0.1 to 20 mm, and the height of the network 3 is 1 to 30 mm. Is appropriate.
[0021]
The waterproof layer formed on the other side of the nonwoven fabric is obtained by coating a waterproof material mainly composed of a synthetic resin emulsion. This waterproof layer has good adhesion to post-cast concrete, prevents breakage of the waterproof layer due to dense subsidence of the ground, and even if the waterproof surface breaks due to cracks in the concrete surface, the waterproof layer itself will retain moisture. It absorbs and swells and closes cracks to prevent water leakage.
[0022]
The waterproof material that forms a waterproof layer that functions in this way has produced a large amount of emulsion hydrate obtained by combining a synthetic resin emulsion as the main component of the film formation and a hydraulic inorganic material, aggregate, etc. As the synthetic resin emulsion, it is preferable to use a hydrophilic emulsion such as an ethylene-vinyl acetate copolymer as the synthetic resin emulsion further enhances the adhesion to concrete as described above.
[0023]
Also suitable as the hydraulic inorganic material is lime aluminate which causes a hydration reaction in a short time and contributes to promoting drying and maintaining stability of the applied waterproofing material. Aggregate (crushed sand) is used to secure the film thickness as a waterproof layer and to improve the film strength. In addition, transition metal hydroxides promote the bonding between emulsion and lime aluminate, further enhancing the effect of lime aluminate and improving the film performance as a waterproof layer. Copper, manganese, iron, zinc Such hydroxides are used.
[0024]
Affixing the waterproof sheet of the present invention having the above-described structure to the underground continuous wall surface is made by making the smooth surface by shaving the extreme irregularities of the wall surface, and then bringing the three-dimensional network surface of the waterproof sheet into close contact with the continuous wall surface. However, it may be performed using a nail with a washer set or a U-shaped bracket.
[0025]
As a waterproofing method , for example , drilling holes from the ground, scraping the extreme irregularities on the surface of the continuous underground wall formed by cement-based materials, chemicals, H-shaped steel, etc. to make a smooth surface, then melting the three-dimensional network on one side Affixed using a nail or a U-shaped bracket with a washer set while the three-dimensional network surface of the non-woven fabric is in close contact with the continuous wall surface, then brushed or sprayed the above waterproof material on the entire surface of the non-woven fabric. Some are coated to form a waterproof layer .
[0026]
According to the above waterproofing construction method, even when a plurality of non-woven fabrics are stuck on the continuous underground wall, the seam of those seams is also covered with a waterproof material, so that a seamless waterproof layer is formed over the entire surface of the plurality of non-woven fabrics. It can be formed.
[0027]
The waterproof layer surface that is seamlessly formed on the entire surface of the non-woven fabric as described above has good adhesion to the concrete to be cast afterwards, and is waterproof even if there is a gap between the concrete body and the earth and sand due to the sedimentation of the earth and sand. Since the layer does not sink with the earth and sand and remains in close contact with the concrete frame, the waterproof layer can block groundwater and prevent water from entering the concrete surface.
[0028]
【The invention's effect】
As described above, the waterproof sheet according to the present invention can be applied to the underground continuous wall surface with a lot of spring water, so that the spring water can fall down along the three-dimensional network, and it is a continuous continuous waterproof. A layer can be formed, and further, a waterproof function can be sufficiently exerted by adhering the waterproof layer to the post-cast concrete surface.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a waterproof sheet according to the present invention.
FIG. 2 is a cross-sectional view showing another embodiment of the waterproof sheet of the present invention.
FIG. 3 is a cross-sectional view showing still another embodiment of the waterproof sheet of the present invention.
4 is a partially omitted enlarged plan view of a three-dimensional network used in the waterproof sheet of FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Waterproof sheet 2 Nonwoven fabric 3 Three-dimensional network 3a Linear body 3b Intersection 4 Waterproof layer 5 Water-impermeable film layer

Claims (2)

A large number of linear bodies intersect each other, and at least a part of the intersections are adhered to each other, and a three-dimensional network body formed with undulating irregularities is laminated on an impermeable film layer bonded to one side of the nonwoven fabric A waterproof sheet in which a part of the network is fused on an impermeable film layer bonded to one side of a nonwoven fabric and a waterproof layer is formed on the other side of the nonwoven fabric . Laminate a three-dimensional network that has undulations formed by crossing a large number of linear bodies and bonding at least a part of the intersections to one side of the nonwoven fabric with an impermeable film layer inside. And a waterproof sheet having a waterproof layer formed on the other side of the nonwoven fabric while being fused to a nonwoven fabric at a part of the mesh.

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