JPH0121282B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a water-blocking (waterproofing) construction method for water reservoirs, garbage disposal plants, tunnels, immersed boxes, and rooftops of buildings. [Background Art and its Problems] One of the conventional waterproof construction methods is the spraying construction method. In this spraying method, a base fabric is laminated onto the surface to be constructed, and then a water-blocking curable liquid is sprayed onto the base fabric, and after the liquid has hardened, it is put into practical use. According to such a spraying method, it is not necessary to apply a mortar base to the surface to be constructed, and it is not necessary to form a water-blocking layer with sufficient water-blocking ability by spraying. However, on the other hand, it had the following problems. That is, since nails were driven into the base fabric when laying the base fabric on the work surface, holes were created in the base fabric, and the holes were further enlarged, causing water leakage. In addition, nails alone are insufficient to fix the base fabric, and after spraying the water-blocking hardening liquid onto the base fabric, a high load is applied, which is particularly problematic on sloped surfaces. In addition, when laying multiple base fabrics, fasteners are attached to the base fabrics and these fasteners are used to connect the base fabrics to each other.However, base fabrics with fasteners are expensive, and the fastener parts corrode when used. This weakened the strength of the base fabric layer laid down. Furthermore, in addition to such problems in terms of durability, nailing and fastening are not necessarily easy tasks, and the construction is not efficient. [Object of the Invention] An object of the present invention is to provide a water-blocking method that is easy to implement and has excellent durability. [Means and effects for solving the problem] Therefore, the present invention provides a base fabric that covers at least a part of the surface to be constructed, while interposing a water-blocking curable liquid material between the surface to be constructed and the surface to be constructed. Lay it on the surface to be worked, and if there is a part of the surface to be worked that is not covered by the base fabric, place another base fabric in the same way as in the above case so that the periphery partially overlaps the laid base fabric. It is laid on the surface to be constructed while interposing a water-shielding curable liquid between it and the surface to be constructed, and then the entire surface to be constructed is covered with the base fabric in the same manner, thereby making it easy to nail or fasten. The purpose of this invention is to eliminate the need for nailing and fasteners, thereby solving the aforementioned various problems associated with nailing and fastening. In addition to the above configuration, after covering the entire surface to be constructed with a base fabric, a water-blocking curable liquid material of a different kind or the same type as the water-blocking curable liquid material is applied on top of the laid base fabric. By coating it, it is intended to further increase mechanical strength and waterproof ability. [Example] Hereinafter, an example of the present invention will be described based on the drawings. FIG. 1 shows an embodiment in which the impermeable construction method according to the present invention is applied to a water storage plant, a garbage treatment plant, etc. In the figure, the ground 1 is dug to a predetermined depth and has a predetermined inclination angle. A water storage section, a garbage burial section, etc. are formed surrounded by the construction surface 2. After the work surface 2 is treated to remove burrs such as vegetation and extreme unevenness, the work surface 2 is
The base fabric 4 wound around the base fabric roll 3 is laid down.
The laying method is to roll the base fabric roll 3 from top to bottom along the work surface 2, and at this time, as shown in FIG. Spray body 5 and go. In this way, as the base fabric roll 3 is rolled out, the water-shielding curable liquid material 5 is interposed between the work surface 2 and the base fabric 4, and a water-shielding curable liquid material layer 6 is sequentially formed. The base fabric 4 is fixed onto the work surface 2 with sufficient strength by the water curable liquid layer 6. The base fabric 4 may be either a non-woven fabric or a woven fabric, but a non-woven fabric is preferred from the viewpoint of waterproofing.
Examples of the nonwoven fabric include polyester nonwoven fabric and polypropylene nonwoven fabric. The water-blocking curable liquid material 5 is made of a urethane liquid polymer, an asphalt emulsion, an asphalt emulsion-urethane mixture, a moisture-curable liquid diene polymer, and a liquid diene polymer having active hydrogen groups. There are mixtures of a liquid main ingredient and a liquid curing agent made of an isocyanate compound, but a liquid main ingredient made of a liquid diene polymer having asphalt and an active hydrogen group, and a liquid curing agent made of an isocyanate compound or asphalt and an isocyanate compound. When it is a blend of , it is possible to obtain a particularly durable water-blocking layer with excellent mechanical strength and water-blocking ability. It is preferable that the water-blocking curable liquid material 5 be sprayed using a spray gun 7, as shown in FIG. 2, in order to perform simple construction. When the water-blocking curable liquid 5 sprayed from the spray gun 7 is a mixture of a liquid base agent and a liquid hardener, the base agent tank 8 and the hardener tank 9 are filled with the above-mentioned liquid base agent and liquid hardener, respectively. The heater 1
While heating with 0, the metering pump 11 feeds a fixed amount to the line mixer 12, where the mixture is mixed at a constant mixing ratio, and immediately after that, the spray gun 7
Make it blow out more. The compressed air necessary for spraying is supplied to the spray gun 7 by a compressor 13, and various substances such as ultraviolet absorbers, antiozonants, antioxidants, etc. When adding additives, the additives are supplied from the line mixer 12 through the additive supply port 14. When laying one base fabric 4, if there are still parts of the work surface 2 that are not covered by the base fabric 4, as shown in FIG. Lay a new base fabric 4 while rolling 3. In this case as well, in the same way as when the base fabric 4 was initially laid while rolling the base fabric roll 3, a water-blocking curable liquid material 5 was placed between the work surface 2 and the base fabric 4.
A water-blocking curable liquid material layer 6 is formed by interposing the water-blocking curable liquid material layer 6, and the surface to be applied 2 and the base fabric 4 are fixed by this water-blocking curable liquid material layer 6. Furthermore, the base fabric 4 to be newly laid
The peripheral edges of the base fabric 4 and the base fabric 4 that have already been laid are partially overlapped with each other so that the gap between the base fabrics 4 is filled. Since the water-blocking curable liquid material 5 is interposed in the overlapping portion of the two base fabrics 4, the base fabrics 4 are also adhered to each other by the adhesive force of the water-blocking curable liquid material 5. Thereafter, in the same manner, the entire work surface 2 is
After covering with water (see FIG. 4), a water-blocking curable liquid material 15 is further applied from above these surfaces 2 to be applied.
As the application means, spraying using a spray gun 7 is preferable. The water-shielding curable liquid material 15 may be the same type as the water-shielding curable liquid material 5 or may be different from the water-shielding curable liquid material 5, but as shown in FIG. Unlike the water-shielding curable liquid layer 6 formed from the water-shielding curable liquid material 5, the water-shielding curable liquid layer 16 formed from the body 15 is exposed to the outside, so it absorbs no ultraviolet rays. Preferably, various additives such as anti-ozonants, anti-ozonants, and antioxidants are added. According to such a water-blocking construction method, it is not necessary to use a base fabric with a fastener, so that construction can be performed at a low cost. In addition, because there are no nails that can cause holes or fasteners that corrode easily, the mechanical strength and waterproofing ability have been improved, making it more durable. In addition, nailing work and fastener installation work are no longer necessary, and the water-blocking hardening liquid 5 can be simply sprayed onto the circumferential surface of the base fabric roll 3 using the spray gun 7 when rolling it. It turned out to be extremely simple. Moreover, the base fabric 4 can be firmly fixed onto the construction surface 2. Furthermore, the peripheral edges of the plurality of base fabrics 4 are made to partially overlap with each other, and the water-blocking hardening liquid 5 is interposed in the overlapped parts, so that the base fabrics 4 are securely fixed to each other and gaps etc. There is no fear that this will occur, and from this point of view as well, it has excellent waterproof ability and mechanical strength. Furthermore, in the above embodiment, the base fabric 4 that has already been laid
Since the water-blocking curable liquid layer 16 is formed on top of the water-shielding liquid layer 16, both mechanical strength and waterproof ability are further enhanced. A specific example is as follows. After deburring the work surface with a slope angle of approximately 60 degrees and a length of 12 m in the slope direction, the base fabric (polyester nonwoven fabric thickness 1.5 mm) was wound into a 4 m wide base fabric roll.
was installed using the method described above. The water-blocking curable liquid interposed between the surface to be applied and the base fabric is a mixture of a liquid main ingredient and a liquid hardener, and this mixture is sprayed onto the base fabric with a spray gun to attach the base fabric. It was impregnated with The liquid main ingredient is formed by blending Compounding Material 1 and Compounding Material 2 shown in Table 1, the liquid curing agent is formed by blending Compounding Material 1 and Compounding Material 2 shown in Table 2, and the third Spraying was carried out under the construction conditions shown in the table.

【table】

【table】

[Table] The water-shielding curable liquid to be applied on the base fabric is of a different type from the water-shielding curable liquid under the base fabric. A liquid curing agent made of the ingredients shown in Table 5 was mixed and immediately sprayed from a spray gun 7. The spraying conditions are as shown in Table 6.

【table】

【table】

[Table] With this water-blocking construction method, the base fabric was firmly laid on the surface to be constructed, and the completed water storage and waste treatment plants had extremely excellent water resistance. Note that in carrying out the process, the method is not limited to the case where a spray gun is used, but a brush or the like may also be used, but if a spray gun is used, the construction is extremely simple. Further, depending on the construction location, the curable water-blocking liquid layer may not be formed on the base fabric using the curable water-blocking liquid. Furthermore, the present invention may be applied to waterproofing of tunnels, etc., roofs, etc. [Effects of the Invention] According to the present invention, one or more base fabrics are laid on the surface to be constructed while interposing a water-blocking curable liquid material between the base fabric and the surface to be constructed. Since the entire surface is covered, it is possible to provide a waterproof construction method that is easy to construct and has excellent durability. Further, after covering the entire surface to be constructed with the base fabric, the mechanical strength and waterproof ability can be further enhanced by applying a water-blocking curable liquid onto the base fabric.

[Brief explanation of drawings]

Figures 1, 3, 4, and 5 are perspective views sequentially showing the construction process of an embodiment of the waterproof construction method according to the present invention, and Figure 2 is a hardening for water shielding in the above embodiment. FIG. 6 is a sectional view showing the structure of a water reservoir etc. formed by the above embodiment. 2...Surface to be applied, 3...Base fabric roll, 4...Base fabric, 5, 15...Curable liquid material for water shielding, 6, 16
... Curable liquid layer for water shielding, 7 ... Spray gun,
8...Liquid main agent tank, 9...Liquid curing agent tank, 11...
...metering pump, 12...line mixer.

Claims (1)

[Scope of Claims] 1. A base fabric covering at least a part of the surface to be constructed is laid on the surface to be constructed while interposing a water-blocking curable liquid material between the surface and the surface to be constructed. In addition, if there is a part that is not covered by the base fabric, use another base fabric so as to partially overlap the periphery of the laid base fabric, and place another base fabric between it and the surface to be coated for waterproofing purposes. A waterproof construction method characterized by laying a base fabric on a surface to be constructed while interposing a water-resistant liquid, and then covering the entire surface to be constructed with a base fabric in the same manner. 2. A base fabric covering at least a part of the work surface is laid on the work work surface while interposing a water-blocking curable liquid between the work work surface, and the work work surface is further covered with the base fabric. If there is a part that is not covered, use another base fabric so that it partially overlaps the periphery of the laid base fabric, and interpose a water-blocking hardening liquid between it and the surface to be covered. After covering the entire surface with the base fabric in the same manner, apply a water-shielding liquid of a different kind or the same type as the water-shielding curable liquid material onto the laid base fabric. A waterproof construction method characterized by applying a hardening liquid.