JPH11210394A - Waterproof sheet and waterproof construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve performance by laminating/fusing a cubic net-like body adhering the crossing part of a large number of linear bodies on one surface side of nonwoven fabric, and forming a waterproof layer on the other surface side of the nonwoven fabric. SOLUTION: A waterproof sheet 1 is constituted by arranging a waterproof layer 4 on the other surface by fusing a cubic net-like body 3 forming a wavy recess- projection extending in the horizontal direction and the thickness direction by fusing an intersection of a large number of linear bodies, on one surface of nonwoven fabric 2. At execution work, the sheet 1 is installed by a nail by bringing the net-like body 3 into cose contact with an underground continuous wall to drop spring water downward by going along the net-like body 3. Next, the waterproof layer 4 is formed of a waterproof material by blending transition metal hydroxide to improve coating film performance of the waterproof layer when necessary by blending an aggregate and a hydraulic setting inorganic material such as lime aluminate to promote hydrating reaction with a synthetic resin emulsion. Therefore, the spring water can be guided downward, a seamless continuous waterproof layer can be formed, and a sufficient waterproof function can be brought out by bringing the waterproof layer into close contact with the post-cast concrete surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground continuous wall formed by drilling a hole from the ground and solidifying it with a cement material, a chemical solution, a steel material, etc. A waterproof sheet that can be constructed to allow the spring water from the continuous wall to fall through the three-dimensional net-like body, and that it has good adhesion to post-cast concrete and can also prevent water from penetrating into the post-cast concrete surface. It is related to the waterproofing method.

[0002]

2. Description of the Related Art Conventionally, on a continuous underground wall having a spring, a method of conducting water by a combination of a water stoppage treatment and a vinyl pipe or by attaching a synthetic resin sheet or nonwoven fabric of polyethylene or the like to the continuous wall surface, Use of a waterproof sheet with a three-dimensional reticulated body combining a reticulated body and a waterproof sheet (JP-A-63-315800, JP-A-1-11199)
No. 9).

[0003]

However, the above-described water guide method using the water stoppage treatment and the use of a vinyl pipe or the like is problematic in that it takes much time and effort. The method of attaching a synthetic resin sheet such as polyethylene is a problem. When another material, such as a waterproof material, is applied on the synthetic resin sheet, there is a disadvantage that adhesion to the synthetic resin sheet is small and integration is not good, and when a non-woven fabric is attached, water is applied to the back surface. There is a disadvantage that it easily accumulates. Furthermore, when a waterproof sheet with a three-dimensional net-like body is used, a seam is formed between the sheets, which has a disadvantage that the continuity of the waterproof layer is impaired.

In view of the above, the present invention makes it possible to waterproof the spring surface on the continuous underground wall surface, has good adhesion to the after-cast concrete surface, and also prevents penetration of the groundwater into the concrete surface. It is an object of the present invention to provide a waterproof sheet and a waterproofing method that can be used.

[0005]

That is, according to the first aspect of the waterproof sheet of the present invention, a large number of linear bodies are crossed with each other, and at least a part of the crossing point is bonded to each other. A three-dimensional net having undulating irregularities is laminated on one surface of the nonwoven fabric, and a part of the net is fused to the nonwoven fabric and a waterproof layer is formed on the other surface of the nonwoven fabric.

According to a second aspect of the present invention, there is provided a three-dimensional net formed by intersecting a large number of linear bodies with each other and bonding at least a part of the intersections to each other to form undulating irregularities on one surface of a nonwoven fabric. The nonwoven fabric is laminated on the water-impermeable film bonded to the nonwoven fabric, and is fused to the nonwoven fabric at a part of the reticulated body, and a waterproof layer is formed on the other surface of the nonwoven fabric.

According to a third aspect of the present invention, there is provided a three-dimensional net having a plurality of linear bodies intersecting each other, and at least a part of the intersections being bonded to each other to form undulating irregularities. The nonwoven fabric is laminated on one surface side of the nonwoven fabric with a film layer interposed therebetween, and is fused to the nonwoven fabric at a part of the mesh body, and a waterproof layer is formed on the other surface side of the nonwoven fabric.

[0008] In the first, second or third aspect of the present invention, the waterproof layer is formed using a synthetic resin emulsion, a hydraulic inorganic material, an aggregate, or a waterproof material further containing a transition metal hydroxide. Further, a cement-based aggregate such as lime aluminate is used as the hydraulic inorganic material.

According to a seventh aspect of the present invention, a three-dimensional net-like body is formed on a continuous underground wall formed by solidifying a hole drilled by an excavator using a cement material, a chemical, a steel material, or the like. The present invention is characterized by a waterproofing method in which a three-dimensional net-like body side of a fused nonwoven fabric is attached, and then a waterproof layer is formed on the other surface side of the nonwoven fabric.

[0010] In the above-mentioned claim 7, the waterproof layer is formed by using a synthetic resin emulsion with a hydraulic inorganic material, an aggregate, or a waterproof material further containing a transition metal hydroxide. It is characterized by using cement-based aggregates such as acid lime.

[0011]

Briefly, the waterproof sheet of the present invention has a structure in which a three-dimensional net is fused to one side of a nonwoven fabric and a waterproof layer is formed on the other side. By adhering so as to be in contact with the continuous wall of the underground structure, the spring water from the underground continuous wall falls down along the three-dimensional net-like body, and is guided to the water channel in the gutter provided at the lower part of the continuous wall. It is characterized by being discharged to.

Further, after-cast concrete is applied to the inside of the waterproof sheet, and the waterproof layer formed on the inner surface of the waterproof sheet has good adhesion to concrete.
Further, this waterproof layer is made of ethylene-based resin as a synthetic resin emulsion which is a main material of a waterproof material used to form the waterproof layer.
By using a hydrophilic emulsion such as a vinyl acetate copolymer, the adhesion to concrete is further increased. In addition, since this waterproof layer has the property of swelling by absorbing water, if groundwater penetrates the nonwoven fabric layer of the waterproof sheet and contacts the waterproof layer, and the waterproof layer is damaged by cracks in the concrete frame, etc. However, the above-mentioned characteristics prevent water from penetrating into post-cast concrete by blocking the infiltration water.

The present invention provides, in addition to a waterproof sheet having the above-described structure, which is used by being attached to a continuous wall of an underground structure,
It is also characterized by a waterproofing method in which a nonwoven fabric with a three-dimensional mesh fused to one side is attached to the continuous wall of an underground structure on the three-dimensional net, and then a waterproof layer is formed on the other (inner) side of the nonwoven. Things.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment 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 net-like body 3 on one surface side of a non-woven fabric 2 in which a large number of linear bodies are crossed to form undulating irregularities. A waterproof layer 4 is formed on the other side by laminating by fusion.

In the waterproof sheet 1, as shown in FIG. 4, the three-dimensional net 3 has a large number of linear bodies 3a crossing each other, and being fused at the intersections 3b to extend in the horizontal direction and the thickness direction. When such a nonwoven fabric is bonded to a continuous wall surface of an underground structure, the three-dimensional net 3 comes into contact with the continuous wall surface of the underground structure. It falls down along the body 3.

FIG. 2 shows the structure of another example of the waterproof sheet of the present invention. The three-dimensional net 3 is laminated on the water-impermeable film layer 5 laminated on one side of the nonwoven fabric 2 by fusion. A waterproof layer is formed on the other side of the non-woven fabric, whereby the spring water can be caused to fall along the three-dimensional net-like body without wetting the surface of the non-woven fabric.

FIG. 3 shows still another example of the waterproof sheet of the present invention, in which a water-impermeable film layer 5 is interposed in the nonwoven fabric 2 and falls down along the three-dimensional net 3. Even if the spring water wets the nonwoven fabric surface, the water-impermeable film layer 5 exerts a water-blocking function and can prevent penetration into the deep portion of the nonwoven fabric layer 2 (the side close to the waterproof layer 4). It is.

In the present invention, as the nonwoven fabric, a natural fiber such as coconut fiber, palm or the like, or a synthetic fiber such as polyethylene, polypropylene, polyester, or polyamide or a fiber made of a mixture thereof is spread in a sheet form, and then needled. A material reinforced by a method such as a punch or a material obtained by a spun bond method is used.

As the water-impermeable film to be bonded to one side of the nonwoven fabric or to be interposed therein, a synthetic resin film such as a polyethylene film or a polypropylene film, or a metal film such as aluminum may be used. .

The three-dimensional net 3 shown in FIG. 4 is formed by interconnecting a large number of linear members 3a such as fine synthetic resin wires such as polyamide, polyester, polyethylene and polypropylene, and metal wires coated with a synthetic resin such as polyvinyl chloride. The linear bodies 3 are extended in irregular directions in the horizontal and thickness directions while intersecting with each other, and are adhered to each other at a number of intersections 3b of the linear bodies 3 to form undulating irregularities. The thickness of the linear body 3a constituting such a three-dimensional net is 0.5
３3 mm is preferred, and the mesh size of the mesh body 3 is 0.1
It is suitable that the height of the mesh body 3 is 1 to 30 mm.

The waterproof layer formed on the other side of the nonwoven fabric is obtained by applying a waterproof material mainly composed of a synthetic resin emulsion. This waterproof layer has good adhesion to the post-cast concrete, prevents the waterproof layer from breaking due to the dense settlement of the ground, and in the unlikely event that the concrete surface cracks and the waterproof layer breaks, the waterproof layer itself absorbs moisture. It absorbs and swells, closing cracks and preventing water leakage.

The waterproofing material forming the waterproofing layer having such a function comprises a synthetic resin emulsion as a main component for forming a film,
This is an emulsion mixture in which a large amount of an emulsion hydrate obtained by blending a hydraulic inorganic material, an aggregate, and the like is produced, and as described above, as a synthetic resin emulsion, the adhesion to concrete is further improved. From ethylene
It is preferable to use a hydrophilic emulsion such as a vinyl acetate copolymer.

As the hydraulic inorganic material, lime aluminate, which causes a hydration reaction in a short time and contributes to promoting drying of the coated waterproof material and maintaining stability, is suitable. Aggregate (silica sand) is used to secure the film thickness as a waterproof layer and to improve the film strength. Furthermore, the transition metal hydroxide promotes the bond between the emulsion and the lime aluminate, further enhancing the effect of the lime aluminate and improving the film performance as a waterproof layer, and includes copper, manganese, iron,
A hydroxide such as zinc is used.

When the waterproof sheet of the present invention having the above-mentioned structure is attached to the continuous underground wall surface, the surface of the wall surface is sharpened to obtain a smooth surface, and then the three-dimensional net-like body surface of the waterproof sheet is connected to the continuous wall surface. It may be carried out using a nail or a U-shaped metal fitting with a washer set in close contact with the metal.

Next, in the waterproofing method of the present invention, a hole is drilled from the ground, and extreme irregularities on the surface of the continuous underground wall formed of a cement-based material, a chemical solution, an H-section steel or the like are cut into a smooth surface. The three-dimensional net of the non-woven fabric with the three-dimensional net fused to one side is adhered to a continuous wall surface using a nail or a U-shaped bracket with a washer, and then the above-mentioned waterproofing is applied to the entire surface of the non-woven fabric. The material is applied by brushing or spraying to form a waterproof layer.

According to the above-mentioned waterproofing method, even when a plurality of nonwoven fabrics are adhered to the continuous underground wall surface, their joints are also covered with the waterproof material, so that the seamless structure is provided over the entire surface of the plurality of nonwoven fabrics. A waterproof layer can be formed.

The waterproof layer surface formed seamlessly on the entire surface of the plurality of non-woven fabrics has good adhesion to the concrete to be subsequently stamped. For example, the concrete frame and the earth and sand are displaced due to the consolidation of the earth and sand. However, since the waterproof layer does not sink together with the earth and sand and stays in close contact with the concrete frame, the waterproof layer can block groundwater and prevent water from entering the concrete surface.

[0028]

As described above, the waterproof sheet and the waterproofing method according to the present invention can be applied to a continuous underground wall surface with a large amount of spring water so that the spring water can be caused to fall down along the three-dimensional net. In addition, it is possible to form a continuous waterproof layer without any seams, and to exert a sufficient waterproof function by bringing the waterproof layer into close contact with the post-cast concrete surface.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a waterproof sheet of the present invention.

FIG. 2 is a sectional view showing another embodiment of the waterproof sheet of the present invention.

FIG. 3 is a sectional view showing still another embodiment of the waterproof sheet of the present invention.

FIG. 4 is a partially omitted enlarged plan view of a three-dimensional net used in the waterproof sheet of FIGS.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterproof sheet 2 Nonwoven fabric 3 Three-dimensional net 3a Linear 3b Intersection 4 Waterproof layer 5 Water-impermeable film layer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hiroshi Kitagawa 3-6-8 Kutaro-cho, Chuo-ku, Osaka-shi, Osaka Daiwa Spinning Co., Ltd.

Claims (10)

[Claims] 1. A three-dimensional net formed by intersecting a large number of linear bodies with each other and adhering at least some of the intersections to each other to form undulating irregularities on one surface side of a nonwoven fabric. A waterproof sheet, characterized in that a part of the nonwoven fabric is fused to the nonwoven fabric and a waterproof layer is formed on the other surface of the nonwoven fabric. 2. A water-impermeable material in which a plurality of linear bodies are crossed with each other, and at least a part of the crossing points are adhered to each other to form a three-dimensional net formed with undulating irregularities on one surface side of the nonwoven fabric. A waterproof sheet, wherein the waterproof sheet is laminated on a film layer, a part of the mesh is fused to the nonwoven fabric, and a waterproof layer is formed on the other surface of the nonwoven fabric. 3. A three-dimensional net formed by intersecting a large number of linear bodies with each other and adhering at least some of the intersections to each other to form undulating irregularities, and a nonwoven fabric having a water-impermeable film layer interposed therein. A waterproof sheet, wherein the waterproof sheet is laminated on one side of the nonwoven fabric, and a waterproof layer is formed on the other side of the nonwoven fabric at a part of the reticulated body. 4. The waterproof sheet according to claim 1, wherein the waterproof layer is formed of a waterproof material obtained by mixing a hydraulic inorganic material and an aggregate with a synthetic resin emulsion. 5. The waterproof sheet according to claim 4, wherein lime aluminate is used as the hydraulic inorganic material. 6. The waterproof sheet according to claim 1, wherein the waterproof layer is formed of a waterproof material obtained by mixing lime aluminate, aggregate, and transition metal hydroxide in a synthetic resin emulsion. . 7. A three-dimensional net surface side of a nonwoven fabric obtained by fusing a three-dimensional net material to one surface side on a continuous underground wall formed by drilling a hole from the ground and solidifying a drilled portion using a cement material, a chemical solution, a steel material, or the like. And then forming a waterproof layer on the other side of the non-woven fabric. 8. The waterproofing method according to claim 7, wherein the waterproofing layer is formed using a waterproofing material in which a hydraulic inorganic material and an aggregate are mixed with a synthetic resin emulsion. 9. The waterproofing method according to claim 8, wherein lime aluminate is used as the hydraulic inorganic material. 10. The waterproofing method according to claim 7, wherein the waterproofing layer is formed using a waterproofing material obtained by mixing lime aluminate, aggregate, and transition metal hydroxide in a synthetic resin emulsion.