JP2001159136A - Waterproof construction method of earth-retaining wall surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof construction method of an earth-retaining wall surface, by which a waterproof layer having sufficient bonding power, by which there is no possibility of the generation of peeling and slipping-down, to the earth-retaining wall surface constructed by an SMW construction method can be formed and moreover which has the superior workability of the execution of works. SOLUTION: An earth-retaining wall 100 is composed of H-steel 110 and soil cement 120. Separators 112 are projected from openings 132, using flexible membrane bodies 130a, 130b with the openings in sections corresponding to the separators 112 projected from the exposed surfaces 111 of H-steel 110, and the earth-retaining wall surfaces 101 are covered, and fixed onto soil-cement surfaces 121 by fixtures 140. A polyurethane waterproofing material is applied from the upper sections of the flexible membrane bodies 130a, 130b and cured, and the polyurethane waterproof layers joined with the exposed surfaces 111 of H-steel 110 are formed through the openings 132.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a steel retaining wall formed by an open-cutting method, and more particularly to a steel material driven at a predetermined interval and a soil cement driven into a gap between the steel materials. The present invention relates to a waterproofing method for a ridge wall surface in which a surface and the soil cement surface are alternately exposed.

[0002]

2. Description of the Related Art For example, when constructing underground structures such as subway stations, underpasses, underground parking lots, underground storage tanks, underground pits, etc., there are two waterproofing methods for these underground structures: a rear waterproofing method and a first waterproofing method. Different types of construction methods are known.

[0003] In the post-waterproofing method, a hole having an inner diameter sufficiently larger than the outer diameter of the underground structure to be constructed is dug, an underground structure is built in the hole, and polyurethane is applied to the outer wall of the completed underground structure. A method of applying a waterproofing material or the like to form a waterproof surface, and finally filling back the holes left in the groove around the structure,
It is adopted when a large work area can be taken around.

On the other hand, the waterproofing method involves digging a hole having a size that is approximately compatible with an underground structure, forming a polyurethane-based waterproof layer on the inner wall of the ridge, and then constructing the underground structure. It is a construction method. The waterproofing method is often used when a large work area cannot be secured around an underground structure due to a limitation of a surrounding environment in an urban area, for example.

[0005] As a method of constructing the retaining wall in the waterproofing method, a soil cement mixing wall method (hereinafter, referred to as SMW method) is known. This S
In the MW method, steel materials such as H steel are installed by digging vertical holes at predetermined intervals so as to surround the site, steel cement is poured around the steel materials, and then the portion surrounded by the buried steel materials is dug. This is a method of forming a hole surrounded by an exposed wall surface of the surface and the soil cement surface.

As such a waterproofing method, for example, Japanese Unexamined Patent Publication No. 9-217467 discloses a method in which a resin-impregnated sheet-like base member made of non-woven fabric or woven cloth is laid on a base-coating surface. A method is disclosed in which a member is partially fixed with a fixing member such as a nail, and a liquid resin is applied to the sheet-like base member.

Japanese Patent Application Laid-Open No. Hei 10-280410 discloses that
After covering the soil cement surface located between the H steels on the mountain retaining wall with a nonwoven fabric, and bonding and fixing both sides of the nonwoven fabric to the H steel, urethane resin or the like is applied to cover the H steel surface from above the nonwoven fabric. A method of spray coating is disclosed.

[0008]

However, in the method disclosed in Japanese Patent Application Laid-Open No. 9-217467, the fixing of the sheet-like base member to the base working surface is only partial fixing with a nail or the like to the base working surface. Therefore, if the exposed surface of the soil cement has a partially soft portion, there is a risk that the sheet-like base member may slip off due to its own weight.

Further, in the method disclosed in Japanese Patent Application Laid-Open No. H10-280410, poor bonding occurs due to the difference in the installation interval of H steel, and much time is required for measuring the nonwoven fabric.
There has been a problem that the frequency of the bonding operation process is increased and workability is deteriorated. Furthermore, since there is a possibility of peeling due to insufficient adhesive strength, there is a problem that it is not suitable for construction in a large area or construction in a place with high humidity.

Therefore, an object of the present invention is to form a waterproof surface having a sufficient joining force without danger of peeling or slipping off on a retaining wall constructed by the SMW method, and to improve workability. An object of the present invention is to provide an excellent waterproofing method for a mountain retaining wall.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a steel material driven at a predetermined interval, a soil cement cast in a gap between these steel materials, and a projecting material from the steel material surface. In a waterproofing method for a retaining wall surface, which is constituted by a separator, and the steel surface and the soil cement surface are alternately exposed, using a flexible membrane having an opening in a portion corresponding to the separator, After covering so as to cover the steel material surface and the soil cement surface, projecting the separator from the opening, and fixing the flexible film body to the soil cement surface with a fixture, the flexible film body A polyurethane waterproof layer bonded to the steel surface through the opening by applying a polyurethane waterproof material from above and hardening the polyurethane waterproof material. It is to provide a waterproof method.

According to the present invention, a flexible film having an opening at a portion corresponding to the separator protruding from the steel surface is used to cover the steel surface and the soil cement surface while projecting the separator from the opening. By covering and fixing the flexible membrane to the soil cement surface with a fixture, it is possible to prevent the occurrence of poor bonding due to a difference in the installation interval of the steel material, and to measure the flexible membrane and measure the bonding process. The workability can be improved by largely omitting it.

Further, since a polyurethane-based waterproofing material is applied from above the flexible membrane and cured to form a polyurethane-based waterproofing layer joined to the steel surface through the opening formed in the flexible membrane. The flexible film body and the polyurethane-based waterproof layer can be firmly fixed to the ridge wall surface.
This is because the adhesive strength between the polyurethane waterproof layer and the steel surface is
This is due to the fact that it is generally stronger than the adhesive force between a flexible film such as a nonwoven fabric and a steel material surface.

As a result, a waterproof layer having a sufficient bonding force without danger of peeling or slipping off from the ridge wall surface is formed. Further, since the waterproof layer formed by applying a polyurethane-based waterproof material on the flexible membrane is formed into a single sheet having no joint, there is no danger of flooding from the joint.

According to a preferred aspect of the present invention, the flexible film is selected from a synthetic resin film, a nonwoven fabric, a woven fabric, and a laminated sheet of a synthetic resin film or a synthetic resin sheet and a nonwoven fabric or a woven fabric. One type is adopted.

According to this aspect, the flexible membrane can make the retaining wall surface smooth, so that the polyurethane-based waterproofing material can be easily applied, and when the flexible membrane has water impermeability. In particular, when applying a polyurethane-based waterproofing material, there is no danger of inundation from the retaining wall surface, and a good waterproof surface can be formed.

According to a further preferred aspect of the present invention, a nail with a washer, an umbrella nail, a pin, or a staple is used as the fixing tool. According to this aspect, the flexible membrane can be easily and quickly fixed to the soil cement surface.

According to a further preferred aspect of the present invention, the ridge wall surface is covered with a plurality of the flexible film bodies so as to partially overlap each other, and the flexible film bodies are overlapped with each other. The joined portion is joined with an adhesive tape, and the periphery of the opening of the flexible film body and the surface of the steel material exposed from the opening are joined with an adhesive tape.

According to this aspect, the flexible membranes can be firmly connected to each other, and since the periphery of the opening of the flexible membrane is in close contact with the steel material surface, the flexible membrane is exposed from the opening of the flexible membrane. It becomes easy to apply polyurethane waterproofing material to the steel surface,
The application of the polyurethane waterproofing material becomes smooth, and the polyurethane waterproofing material can be firmly joined to the steel surface.

[0020]

1 to 3 show one embodiment to which a waterproofing method for a retaining wall according to the present invention is applied.
FIG. 1 is a perspective view showing a main portion of a ridge wall surface before applying a polyurethane waterproofing material, and FIG. 2 is a cross-sectional view of the ridge wall surface after applying a polyurethane waterproofing material taken along the arrow line A in FIG. FIG. 3 is a plan cross-sectional view of the retaining wall surface after the polyurethane waterproof material is applied, which is cut along the arrow line B in FIG. 1.

As shown in FIG. 1, the retaining wall 100 has a plurality of Hs which are driven at predetermined intervals, for example, intervals of 0.5 to 1 m so that the concave surfaces 113 on the side face each other and the longitudinal direction is upright. The steel H includes steel 110 (corresponding to a steel material in the present invention), and soil cement 120 filled in the gap between the concave surfaces 113 on the opposite sides of the plurality of H steels 110. A plurality of separators 112 having a predetermined interval protrude from the exposed surface 111 of the H steel 110. Also, the exposed surface 121 of the soil cement 120 (corresponding to the soil cement surface in the present invention) and the exposed surface 1 of the H steel 110
11 (corresponding to the steel surface in the present invention) are alternately arranged to form the retaining wall surface 101. Exposed surface 12
The width of 1 is 0.2 to 0.5 m, and the width of the exposed surface 111 is 0.2 to 0.3 m. The separator 112
Is used to form a form when a concrete layer serving as a wall of an underground structure is cast inside the retaining wall surface 101. That is, the frame plate is arranged at a predetermined interval inside the retaining wall surface 101, and a reinforcing bar is disposed in the gap between them to form a form. At this time, the separator 112 is used as a support rod for the frame plate and the reinforcing bar. Is used. After that, concrete is poured into the mold and cured to form a concrete layer.

The ridge wall surface 101 is connected to the separator 1
Flexible membrane 1 having an opening 132 at a portion corresponding to 12
The flexible membrane 130 a is covered with the flexible film 30 a, and the portion covering the exposed surface 121 of the soil cement 120 is partially fixed by the fixture 140. In addition, as shown in FIG. 2 and FIG.
The flexible membrane 130a penetrates the flexible membrane 130a and reaches the inside of the soil cement 120, and fixes the flexible membrane 130a to the exposed surface 121 of the soil cement 120.

The flexible film body 130a is laid horizontally on the ridge wall surface 101, and one flexible film body 130a is provided.
If it cannot be covered with a, for example, another horizontally long film body 130b is arranged below the lower surface, and is laid so that the long sides of the vertically adjacent flexible film bodies 130a and 130b partially overlap. The lower flexible film body 130b also has an opening 132 (not shown) at a portion corresponding to the separator 112 (not shown).

The adjacent flexible membranes 130a, 130
The overlapped portions of b are joined by an adhesive tape 131. Further, the peripheral portion of each opening 132 of the flexible film bodies 130a and 130b is connected to the exposed surface 111 of the H steel 110 by another adhesive tape 131. Are joined.

As shown in FIG. 2, the surfaces of the flexible membranes 130a and 130b fixed so as to cover the
As shown in FIG. 3, a waterproof layer 160 is formed by spraying and applying a polyurethane waterproof material. In addition,
As shown in FIG. 3, around the separator 112, a polyurethane-based waterproof material is made of a flexible film body 130 a, 1.
Through the opening 132 of the 30b, the exposed surface 11 of the H steel 110
1, the waterproof layer 160 is firmly joined to the exposed surface 111 of the H steel 110. The opening 13
The primer 150 is applied in advance to the exposed surface 111 of the H steel 110 exposed from 2 to increase the adhesion of the polyurethane waterproof layer 160.

Next, referring to the drawings of the above embodiment,
The method of waterproofing the retaining wall of the present invention will be described. First,
A trench is dug using a drill or the like so as to surround a place where an underground structure is to be constructed, and H steels 110 are inserted and installed at predetermined intervals, for example, at intervals of 0.5 to 1 m. Pour the soil cement 120 and harden the periphery of the H steel 110. Thereafter, a place along the plane 111 of the H steel 110 is excavated to form an underground space surrounded by the retaining wall 100. At this time, since the gap between the H steels 110 is filled with the soil cement 120, the gap does not collapse due to cutting. The mountain retaining wall 100 surrounding the underground space formed in this way has a plurality of Hs which are driven at predetermined intervals so that the concave surfaces 113 on the sides face each other and the longitudinal direction is upright.
The steel 110 includes soil cement 120 filled in the gaps between the concave surfaces 113 on the opposite sides of the plurality of H steels 110.

Next, a separator 112 is attached to the exposed surface 111 of the H steel 110, and then the separator 112
Clean the surrounding area to remove floating rust and mud. Note that the range for performing the Keren is, for example, the separator 112.
The length of one side of the H steel 110 may be approximately the same as the width of the H steel 110, and the exposed surface 111 of the H steel 110
It is not necessary to do it all over.

Subsequently, at least the openings 1 of the flexible membranes 130a and 130b, which are the portions where the above-mentioned cleaning was performed.
The primer 150 is applied to the portion exposed from the surface 32 using, for example, a roller and a brush at a rate of 0.10 to 0.20 kg / m ² .

The primer 150 is not particularly limited as long as it can bond H steel and a polyurethane waterproof material, but is preferably of a type dedicated to an epoxy metal.

After the primer 150 is cured, the adjacent flexible film members 130a and 130b are overlapped with each other by, for example, a width of 20 to 70 mm while spreading the long flexible film members 130a and 130b in the horizontal direction. To have
The soil cement 1 is laid on the
At a predetermined interval, a fixing member 140 is attached to a portion covering the exposed surface 121 of the flexible member 20 with the flexible film 130a and the film 13
0b so as to penetrate the flexible film 130a.
Then, the film body 130b is fixed to the exposed surface 121 of the soil cement 120.

The flexible film body 130a is made of a flexible, preferably water-impermeable material, and is not particularly limited as long as it can cover and smooth the ridge wall surface 101, for example, a synthetic resin film. , A synthetic resin sheet, a nonwoven fabric, a woven fabric, and a laminated sheet of a synthetic resin film or a synthetic resin sheet and a nonwoven fabric or a woven fabric are preferable. In particular, it is a sheet in which a nonwoven fabric is laminated on both sides of a water-shielding synthetic resin film, and has a total thickness of 1 to 3 mm, from the viewpoint of improving the reliability of waterproofness, with a strong adhesive force with a polyurethane waterproof material. Is preferred. For example, a laminated sheet formed by laminating a polyester nonwoven fabric on both sides of a polyethylene film having a thickness of 10 to 200 μm is preferably used.

As the fixing device 140, a nail with a washer, an umbrella nail, a pin, and a stable are used, but a nail with a washer or an umbrella nail having a large pressing area is particularly preferable. In addition, there is a partly weak place in soil cement,
The purpose of fixing by the fixing tool is only to temporarily fix the membrane, and there is no problem because the expression of the mounting strength is not the main purpose. In addition, the fixing device 140 includes a flexible film body 130a.
It is preferable to install at least at the upper and lower edges and at a portion where the soil cement 120 is a base, and at a portion where the flexible membranes 130a overlap each other,
It is preferable to install a plurality of the wires in the overlapping portion. It is sufficient to provide one piece of soil cement 120 in each row above and below, but it may be provided in the upper and lower middle part or the like.

The flexible membranes 130a and 130b have openings 1 in advance at portions corresponding to the separators 112.
32 may be provided, but the flexible film bodies 130a, 1
After laying the opening 30b, the periphery of the separator 112 of the flexible film bodies 130a and 130b is cut into a square or the like having a predetermined width centered on the separator 112, and the opening 1 is cut out.
32 may be formed. The width of the opening 132 is
For example, if the width of the opening 132 is a and the width of the H steel is W, W>a> 0.2 W (particularly 0.8 W>a> 0.3).
It is preferable to set the range in which the relationship W) is satisfied. W is usually 0.2 to 0.3 m. When W is 0.2 m, a is preferably about 0.1 m, and when W is 0.3 m, a
Is preferably about 0.2 m.

Subsequently, the flexible film members 130a, 130
b, an adhesive tape 131 is attached between the periphery of the opening 132 and the exposed surface 111 of the H steel 110, and the periphery of the opening 132 of the flexible film bodies 130a and 130b is
0 exposed surface 111. Further, the adhesive tape 131 is also applied to a portion where the flexible film bodies 130a and 130b overlap each other to eliminate a step at a connection portion thereof, maintain smoothness after construction of the waterproof layer, and achieve a good finish. To be. The pressure-sensitive adhesive tape 131 is not particularly limited, but a tape obtained by laminating a film on a nonwoven fabric and further applying a pressure-sensitive adhesive on the film is particularly preferable for reasons such as bonding property with urethane resin and waterproofness. Instead of using the adhesive tape 131, a method of bonding with an adhesive may be adopted.

After laying the flexible membranes 130a and 130b in this manner, a polyurethane waterproof material is sequentially sprayed from the upper portion to the lower portion by using a two-component collision mixing type spray coating device equipped with a high-pressure spray gun, for example. Thereby, the waterproof layer 160 is formed. The polyurethane-based waterproofing material includes, for example, a solvent-free ultra-fast curing 2 liquid comprising a solvent-free polyisocyanate prepolymer and a solvent-free polyol and / or a solvent-free polyamine.
Liquid polyurethane waterproofing materials are preferred. Such a waterproof material is a solvent-free type which does not cause air pollution due to volatile components, and reacts quickly when mixed with a high-pressure spray device.

The thickness of the waterproof layer 160 formed by applying a polyurethane waterproof material is preferably 1 to 3 mm. If the thickness of the waterproof layer 160 is less than 1 mm, there is a risk of water leakage due to unevenness of the waterproof layer. If the thickness exceeds 3 mm, the reliability of waterproofing is improved, but the material consumption increases and the cost increases.

[0037]

EXAMPLE A 1.5 mm-thick laminated sheet obtained by laminating a polyester non-woven fabric on both sides of a polyethylene film on a retaining wall surface consisting of an H steel surface having a width of 0.3 m and a soil cement surface having a width of 0.3 m. Was fixed by the following various methods, and a water-resistant layer was formed by spraying and applying a solventless ultra-fast curing two-component polyurethane-based waterproofing material from above the sheet. The peel strength of the waterproof sheet formed in this way was measured according to JIS.
It measured by the method according to K-6854.

Example 1) The exposed surface of H steel and the above-mentioned sheet were adhered with an epoxy-based adhesive, and a polyurethane-based waterproofing material was sprayed on the sheet to form a waterproof layer.

Example 2) The exposed surface of H steel and the above-mentioned sheet were adhered with a urethane-based adhesive, and a polyurethane-based waterproofing material was sprayed and applied on the sheet to form a waterproof layer.

Example 3) The above-mentioned sheet was fixed by placing an umbrella nail on the surface of soil cement, and a polyurethane-based waterproofing material was sprayed on the sheet to form a waterproof layer.

Example 4) The above-mentioned sheet was fixed by placing an umbrella nail on the soil cement surface, and an opening of 0.2 m × 0.2 m was formed in a portion of the sheet where the H steel was used as a base. A polyurethane waterproofing material was sprayed on the sheet to form a waterproof layer, and at this time, the polyurethane waterproof layer was adhered to the exposed surface of the H steel through the opening of the sheet (in the method of the present invention). Applicable).

In each of the above examples, the waterproof layer was formed by curing for 7 days in an environment at a temperature of 20 ° C. and a humidity of 60%. With respect to Examples 1 to 4, the peel strength of the waterproof sheet composed of the sheet and the waterproof layer was measured by the following method.

Measuring method of Examples 1 and 2 The waterproof sheet bonded to H steel was cut vertically into strips having a width of 25 mm, and one end of each strip was pulled in the horizontal direction with respect to the base surface and peeled off. The required tensile load was measured.

As shown in FIG. 4A, the waterproof sheet 200 fixed to the soil cement surface 120 with the umbrella nail 201 has a width w of 2 mm.
It is cut into strips in the vertical direction so as to have a length of 5 mm. At this time, the middle of each strip is fixed with one nail 201. Next, as shown in FIG. 4B, one end 200 a of the strip-shaped piece of the waterproof sheet 200 is
Was pulled in the horizontal direction with respect to the soil cement surface 120, and the tensile load required for peeling was measured.

Measurement method of Example 4 1: As shown in FIG.
0 is the laminated sheet 130 and the polyurethane-based waterproof layer 160
It consists of The polyurethane waterproof layer 160 is directly joined to the surface of the H steel 110 through the opening 132 of the laminated sheet 130. Therefore, the waterproof sheet 200 is cut in a longitudinal direction into a strip shape so that the width w becomes 25 mm so as to pass through the portion directly joined to the H steel 110. As shown in FIG. 5B, one end 200 a of the strip-shaped piece of the waterproof sheet 200 is connected to the H steel 11 via a measuring device 202.
It was pulled in the horizontal direction with respect to 0, and the tensile load required for peeling was measured.

Part 2: As shown in FIG. 6A, a portion where the polyurethane waterproof layer 160 of the waterproof sheet 200 is directly joined to the surface of the H steel 110 through the opening 132 of the laminated sheet 130; The waterproof sheet 200 is cut laterally in a strip shape so that the width w becomes 25 mm so that the waterproof sheet 200 passes through the portion fixed to the soil cement surface 120 with the umbrella nail 201. Then, as shown in FIG. 6 (b), the H-shaped steel 11
The measuring device 202 was connected between the portion directly joined to the portion 0 and the portion fixed with the nail 201, and the measuring device 202 was pulled perpendicularly to the wall surface of the pier and the load required for peeling was measured. . Table 1 shows the results.

[0047]

[Table 1]

As shown in Table 1, in Examples 1 and 2, the results varied due to the influence of humidity under environmental conditions and the degree of adhesion of the laminated sheet. Example 3
The results varied due to the effect of the soft part of the soil cement.

The result of Example 4 is the result common to both the above Nos. 1 and 2, and it can be seen that the peel strength is the strongest. Therefore, it was confirmed that the waterproofing layer having high bonding strength was formed by the method of the present invention.

Further, the waterproof sheet of Example 4 was subjected to JIS
A penetration test using an L · 1018 penetration tester and a water resistance pressure test using a pressure filter shown in FIG. 7 were performed.

The water pressure resistance test using the above pressure filter will be described. As shown in FIG. 7, the pressure filter main body 210 has a holder 2 for holding a sample sheet 211 on the lower surface.
The holder 212 is supported on a tripod 213. The sample sheet 211 is placed on a perforated plate 214 and held by the holder 212. At the center of the lower surface of the holder 212, a drain pipe 215 with a valve is attached.
The water that has passed through the sample sheet 211 is discharged and collected in a measuring cup 216 disposed below the water. A water supply pipe 218 is connected to an upper portion of the pressure filter main body 210 via a pressure gauge 217, and by opening a valve 219, pressurized water is supplied to the pressure filter main body 210. I have.

Therefore, the sample sheet 211 is
4 and held and fixed to the holder 212, and the water supply pipe 218.
The pressurized water is supplied to the pressurized filter main body 210.
Then, after applying 294 kPa of pressurized water to the sample sheet 211, the valve of the drain pipe 215 was opened, and the water permeating the sample sheet 211 was collected in the measuring cup 216, thereby confirming the presence or absence of water leakage. Table 2 shows the results.

[0053]

[Table 2]

As shown in Table 2, it can be seen that the waterproof sheet of Example 4 has sufficient strength as a waterproof layer. In particular, the fact that the water pressure resistance was 294 kPa or more was equivalent to the water pressure of 30 m or more underground, and it was confirmed that construction to a structure at that depth was possible. Therefore, it was confirmed that the waterproofing method of the present invention is a method that can sufficiently cope with waterproofing of underground structures.

[0055]

As described above, according to the present invention, the underground structure has a sufficient joining force to the retaining wall constructed by the SMW method without danger of peeling or slipping off. Waterproofing method to the wall of the retaining wall, which has sufficient water resistance as a waterproof material and can form a single sheet-like waterproof layer with no danger of inundation from the seam, and is excellent in workability of construction. Can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a retaining wall surface before application of a polyurethane waterproofing material.

FIG. 2 is a cross-sectional plan view of the retaining wall surface after application of a polyurethane waterproofing material, which is cut along arrow A in FIG.

3 is a cross-sectional plan view of the retaining wall surface after application of a polyurethane-based waterproofing material, which is cut along arrow B in FIG. 1;

4A and 4B are a front view and a side sectional view showing a peel strength measuring method of Example 3.

5 is a front view and a side sectional view showing a method for measuring the peel strength of a portion where a polyurethane waterproof layer is bonded to an exposed surface of H steel in Example 4. FIG.

FIG. 6 is a front view and a side sectional view showing a method for measuring the peel strength of a portion fixed to an exposed surface of soil cement by nailing in Example 4.

FIG. 7 is a front view of the pressure filter.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 mountain retaining wall 101 mountain retaining wall 110 H steel 112 separator 120 soil cement 130 a / 130 b flexible film 140 fixing device 150 primer 160 polyurethane waterproof layer

Continuation of front page (72) Inventor Yukio Matsumoto 1150 Hazawa-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture F-term in Asahi Glass Co., Ltd. 2D047 AA02 AB08

Claims (4)

[Claims] 1. A steel material driven at a predetermined interval, a soil cement cast in a gap between these steel materials, and a separator protruding from the steel material surface, wherein the steel material surface and the soil cement surface In the waterproofing method for the ridge wall surface that is alternately exposed, using a flexible membrane having an opening in a portion corresponding to the separator, covering the steel material surface and the soil cement surface so as to cover the steel material surface and the soil cement surface. After projecting the separator from the opening, and fixing the flexible film body to the soil cement surface with a fixture, a polyurethane-based waterproofing material is applied from above the flexible film body and cured, A waterproofing method for a mountain wall surface, comprising forming a polyurethane waterproof layer bonded to the steel surface through the opening. 2. The method according to claim 1, wherein the flexible film is a synthetic resin film,
The method of waterproofing a retaining wall according to claim 1, wherein the waterproofing method is one selected from a synthetic resin sheet, a nonwoven fabric, a woven fabric, and a laminated sheet of a synthetic resin film or a synthetic resin sheet and a nonwoven fabric or a woven fabric. 3. The fixing tool according to claim 1, wherein the fixing tool is a nail with a washer, an umbrella nail,
2. The semiconductor device according to claim 1, which is one selected from a pin and a stable.
Or the waterproofing method of the mountain retaining wall described in 2. 4. A plurality of the flexible membranes are used to cover the ridge wall surface so as to partially overlap each other, and the overlapping portions of these flexible membranes are joined by an adhesive tape. 2. An adhesive tape is used to join the peripheral edge of the opening of the flexible membrane to the steel surface exposed from the opening.
The waterproofing method for a mountain wall surface according to any one of Items 1 to 3.