KR100240837B1 - Waterproof method of concrete water-tank in the underground - Google Patents

Abstract

The present invention relates to a waterproofing method of the underground concrete structure for a water tank for waterproofing the inner surface of a reinforced concrete structure, which is installed in the ground in the shape of a cylinder and used as a water tank in which various liquids are contained. To provide a structure of reinforced concrete for water tanks by forming a strong and easy waterproof sheet layer on the inner surface of the structure to ensure excellent waterproof performance regardless of structural defects such as cracks and minute gaps of reinforced concrete structures. For the construction, the base sheet 22 having a suitable width embedded with polyethylene as a base material to expose the mesh cloth S1 on both sides thereof is successively attached to the inner surface 11 of the structure 10. Formation process of the base sheet layer which forms the sheet | seat worm | melt 20, The one side using polyethylene as a base material The meshes S1 are bonded to the outer surface of the base sheets 22 with the finishing sheets 33 having appropriate widths in which the meshes S1 are embedded on the surface to seal the space between the base sheets 22. By sequentially performing the process of forming the finish sheet layer forming the finish sheet layer 30 covering the outer surface of the base sheet layer 20, it is to form a perfect waterproof layer on the inner surface of the reservoir reinforced concrete structure underground.

Description

Waterproofing method of underground reinforced concrete structure for water tank

The present invention relates to a waterproofing method of the underground reinforced concrete structure for the water tank to be easily and completely waterproof to the inner surface of the reinforced concrete structure used in the reservoir in the ground in the shape of a cylinder.

Concrete is a member that is very commonly used in construction structures because of its excellent ability to cope with compressive loads and its excellent formability.

However, since concrete members are relatively weak in tensile and shear forces, structures constructed with such concrete are reinforced with reinforcing bars at the cross-sections where the most effective stresses of the members can be expected. Damage to the structure due to cracking or high age corrosion is not completely prevented.

In addition, in the case of underground reinforced concrete structures containing various toxic liquids, corrosion or damage of the structure proceeds rapidly due to the toxicity of the liquid or frequent contact of moisture, and the contents may be leaked. It is clear that the toxic liquid leaks greatly contaminate the underground environment.

Therefore, the reinforced concrete structure installed underground and used for the storage tank should be separately waterproofed inside.

There were many waterproof methods for underground reinforced concrete structures for water tanks, but it was difficult to expect a simple and perfect waterproof construction due to the complexity of construction or problems of waterproof performance.

Polyethylene sheets are flexible and have excellent tensile strength, but because they have a chemically very stable structure, it is not easy for a chemical reaction to occur once molding is completed.

If the polyethylene sheet is used for waterproof construction of concrete structures, it can be expected that it will not corrode even when connected to toxic liquids.

On the other hand, it was practically difficult to find a technique that could chemically react and adhere firmly to the structure. Even if it is successful in bonding the members, it is difficult to prepare appropriate measures to prevent the leakage phenomenon caused by the material separation of the joint portion.

Therefore, polyethylene sheet has not been recognized as a suitable material for waterproof work due to problems of adhesion technology.

The present applicant has developed a polyethylene sheet molded by embedding a mesh cloth so that a part of the surface is exposed on one or both surfaces.

In this way, the mesh sheet embedded with the mesh cloth is very useful because the mesh cloth expressed on the surface of the sheet serves as a medium for bonding, and it is possible to bond various heterogeneous materials to the surface in a free and robust structure.

An object of the present invention is to form a solid and simple waterproof sheet layer on the inner surface of the underground reinforced concrete structure containing a variety of liquid using a polyethylene sheet embedded in the net cloth exposed to the surface, cracks of reinforced concrete structure It is to provide a waterproofing method for underground reinforced concrete structures for water tanks, which ensures excellent waterproofing performance regardless of structural defects such as minute gaps.

1 is a partial cross-sectional view of the underground reinforced concrete structure for the reservoir according to the waterproof method of the present invention

2 is an enlarged view of part "A" of FIG.

3a to 3c is a perspective view and a cross-sectional view showing a mesh cloth embedded polyethylene sheet used as a raw material of the base and the finish sheet in the waterproofing method according to the present invention

Figure 4 is an exemplary view showing an example of the layout of the base and the finish sheet according to the waterproof method of the present invention

Figure 5 is an excerpt sectional view showing a riding example of the backsheet according to the waterproof method of the present invention

6 is a perspective view showing an example of the treatment of the corner portion of the structure according to the waterproof method of the present invention

7 is a perspective view showing an example of treatment of the corner portion of the structure according to the waterproof method of the present invention

* Explanation of symbols for main parts of the drawings

10 structure 11 inner surface

11x, 11y: wall 11z: bakdakmyeon

20: background sheet 22: background sheet

23: adhesive 24: tableting nail

30: finishing sheet layer 33: finishing sheet

44: corner sheet S: polyethylene sheet

S1: Netting

Hereinafter, the technical configuration of the present invention in detail.

The waterproof method of the underground reinforced concrete structure for the water storage tank of the present invention is installed in the ground in the shape of a cylinder to have a base sheet 22 having a suitable width on the inner surface 11 of the reinforced concrete structure 10 in which the liquid is contained therein; The base sheet layer 20 is formed by successively attaching the base sheet layer 20 to form a base sheet layer 20 and sealing the space between the base sheets 22 with the finishing sheets 33 having an appropriate width. Covering the outer surface of the adhesive is formed by sequentially performing the process of forming the finish sheet layer to form a finish sheet layer (30).

The material of the backsheet 22 and the finish sheet 33 is based on a polyethylene having a thickness and flexibility showing sufficient strength depending on the characteristics of the structure, as shown in FIGS. 3A to 3C. Reference numeral 22 denotes a finish sheet 33 on both sides of the polyethylene sheet S formed in a quadrangular shape by embedding the mesh cloth S1 on one surface thereof.

At this time, the inner surface 11 of the structure 10, as shown in Figures 1 and 2, so that the mesh cloth (S1) embedded in one surface of the backsheet 22 abuts, and the backsheet 22 ) And the finishing sheet 33 are bonded to each other, the mesh cloth (S1) is placed in contact with each other by applying an adhesive 23 to adhere.

As the adhesive, a polyester or epoxy-based adhesive is used, and the mesh net (S1) is preferably woven from vegetable fibers such as burlap.

In this case, the coated adhesive 23 is impregnated deep inside the mesh cloth (S1) due to the capillary phenomenon, the mesh cloth (S1) is firmly and densely embedded in the body of the polyethylene sheet (S) through the fine fiber yarns Since the inner surface 11 and the backsheet 22 of the structure 10 and the backsheet and the finish sheet 33 are firmly adhered to each other because they are maintained in the closed state.

The underground reinforced concrete structure for the water tank constructed in accordance with the present invention is because the waterproof sheet layer formed on the inner surface is made of a double polyethylene sheet layer bonded as a solid structure through a mesh cloth embedded integrally in the members. Firstly, the concerns of material separation on adhesives were eliminated. Second, the advantages of water-proof performance of polyethylene sheet with excellent chemical stability were obtained. Third, the finishing sheet which forms the first waterproof layer by directly contacting liquid. Even if one of the layers is damaged, the backsheet layer located inside of it will perform the second waterproofing function, thus showing perfect waterproofing function.

Of course, it can be assumed that the concrete member and the polyethylene have a different thermal expansion coefficient, so that the adhesive force of the adhesive portion is lowered by the different stretching action of both members according to the changing ambient temperature.

However, the present invention is applied to the structure of the underground that does not have a large temperature deviation is not a problem because the expansion and contraction action of the heat of concrete and polyethylene is extremely fine and does not affect the adhesive part.

Hereinafter, the present invention will be described in more detail with reference to embodiments of the present invention.

Embodiments of the present invention shown in Figures 1 to 7 is also installed in the ground in the shape of a cylinder, the net cloth on both sides of the inner surface 11 of the reinforced concrete structure 10 in which the liquid is contained therein Forming a base sheet layer 20 by pasting the embedded polyethylene sheets, and forming a finish sheet layer 30 by pasting the polyethylene sheets buried in one surface with a mesh cloth on the outer surface of the base sheet layer. In this regard, the technical spirit of the present invention is realized based on the basic technical configuration of the present invention.

In the present embodiment, the backsheet 22 is formed in a quadrangular shape to have an appropriate width, as shown in FIG.

At this time, the backsheets 22 may be attached only to the inner surface 11 of the structure 10 with an adhesive 23, as shown in FIG. 1, or through the adhesive 23, as shown in FIG. It may also be carried out by a technique of first bonding, followed by driving the tableting nails 24 at the appropriate intervals of their edges and fixing them secondarily.

Fixing the backsheet 22 with the tableting nail 24 is a function that allows the tableting nail to continue to hold the backsheet even when the structure of the structure is old and the oxidation occurs in the concrete member, resulting in a drop in the adhesive layer. To give.

In the present invention, in bonding the finish sheet 33 to the outer surface of the base sheet layer 20, as shown in FIG. It is preferable to seal by placing and adhering the parts.

Such a technical configuration is a waterproof structure of the structure because the smooth surface of the base sheets 22 attached to the inner surface of the structure 10 is not closely adhered to the gap, even if there is a gap, the gap is covered by the smooth middle part of the finish sheet 33. Eliminates the possibility of structural defects.

Meanwhile, the underground reinforced concrete structure for the water storage tank to which the present invention is applied may have various types of internal cross-sectional structures such as bent portions as well as flat surfaces.

Therefore, this embodiment proposes a suitable technique for attaching the waterproof sheet according to the cross-sectional structure of the structure.

First, in FIG. 6, two inner surfaces 11 of the structure 10, namely, the bottom surface 11z and the wall surfaces 1 1x and 11y, the wall surfaces 11x and 11y, or the upper surface when the upper slab is present. The treatment of the corner formed by the contact between the wall surfaces 11x and 11y and the like is exemplified by a technique in which the base sheet 22 and the finish sheet 33 are closely attached by bending the base sheet 22 and the finish sheet 33 in a corresponding cross-sectional shape.

In this case, it is preferable that the backsheet 22 and the finish sheet are arranged to be staggered with each other like a flat surface to thoroughly seal the butted portions of the backsheets 22.

In addition, the structure 10 may have a corner formed by the three inner surface 11 meets.

In this case, as shown in FIG. 7, the corner sheet having the corner sheets 44 formed by cutting a corner portion of the polyethylene sheet S formed at four angles at a right angle is formed to correspond to the shape of the corner. When attached by bending, it is possible to easily solve the formation of the waterproof sheet in the corner of the structure (10).

In the corner sheet 44, the base sheet layer 20 is also formed on both surfaces, and the sheet sheet 30 is formed by using a mesh cloth embedded on one surface. It is preferable to apply | coat once again and to post-process tightly.

Although embodiments of the present invention have been shown and described as a representative of the four-sided cylindrical structure, the present invention is not limited to this, for example, the inner cross-sectional structure, such as cylindrical, polygonal cylindrical or inner partition is installed, etc. Even if is changed to waterproof in the manner described above there is no problem because the separate illustration and description are omitted, even in this case it is to be found that it is included in the technical idea of the present invention.

As described above, by using the polyethylene sheet having excellent tensile strength and flexibility as the material, the waterproofing method of the present invention provides perfect waterproofing regardless of cracks that are likely to cause structural defects in the subway near-concrete structure in which various liquids are contained. There is an effect that can be more easily installed waterproof sheet layer to ensure the performance.

Claims (6)

In the case of waterproofing the reinforced concrete structure 10 installed in the ground in the shape of a cylinder and containing liquid therein, a base sheet having an appropriate width embedded with polyethylene as a base material so that the mesh cloth S1 is exposed on both surfaces thereof. Process of forming the base sheet layer to form the base sheet layer 20 by successively attaching 22 to the inner surface 11 of the structure 10 and a mesh netting on one surface thereof using polyethylene as a base material. Is bonded to the outer surface of the backsheets 22 so that the mesh sheets S1 abut on the outer surfaces of the backsheets 22 so as to seal the space between the backsheets 22. Waterproofing method of the underground reinforced concrete structure for the water storage tank, characterized in that the construction by sequentially performing the process of forming the finishing sheet layer forming the finishing sheet layer 30 covering the outer surface. 2. The sheet sheet 22 and the finish sheet 33 are formed in a quadrangular shape having a thickness and flexibility showing sufficient strength depending on the characteristics of the structure and having an appropriate width, so that the outer peripheries of the sheet can be formed. Waterproofing method of the underground reinforced concrete structure for the reservoir, characterized in that the adhesive is placed by successive arrangement to be in close contact with each other. 3. The back ground material (22) according to any one of the preceding claims, wherein the back ground (22) is first adhered to the inner surface (11) of the structure (10) through an adhesive (23), and then tableting nails at appropriate intervals of its edges. Waterproofing method of the underground reinforced concrete structure for the water reservoir, characterized in that by attaching (24) to the secondary fixed. The water tank according to claim 1 or 2, wherein the parts of the base sheet layer (20) where the neighboring base sheets (22) butt against each other are sealed by positioning and bonding an intermediate portion of the finish sheets (33). Waterproofing method for underground reinforced concrete structures. According to claim 1 or 2, wherein the two inner surface 11 of the structure (10) is formed in a corner corresponding to the base sheet 22 and the finish sheet 33 in close contact with the shape correspondingly attached Waterproofing method of underground reinforced concrete structures for water tanks characterized in that. The base sheet 22 and the finish sheet 33 disposed in the corner formed by the three inner surfaces of the structure 10 meet any one of the polyethylene sheets formed in a quadrangular shape. Waterproofing method of the underground reinforced concrete structure for a water tank having a corner sheet (44) processed by cutting a corner portion of the corner at a right angle and bent in a shape corresponding to the shape of the corner.

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