JP3563825B2 - Protective material for waterproof sheet of waste disposal plant and its construction method - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a waterproofing construction method for a waste disposal site and a waterproofing sheet protective material used for the method.
[0002]
[Prior art]
At the waste disposal site for industrial waste and / or general waste, waterproofing is performed to block the water flow on the ground surface forming the disposal site from the viewpoint of pollution prevention. As a waterproof construction of a treatment plant, it is customary to lay a waterproof sheet made of a rubber sheet, a plastic sheet or the like on the ground surface.
[0003]
However, in a waste disposal site, as is known, dumping of various kinds of waste such as hardness, shape and the like is performed by a dump truck. There is a risk of causing breakage.
[0004]
To cope with such a problem, Japanese Patent Application Laid-Open No. 3-32790 discloses an idea of covering a waterproof sheet with a protective soil. Japanese Patent Application Laid-Open No. Hei 6-248624 discloses a concept in which an asphalt emulsion is sealed in a bag-like waterproof sheet so that the waterproof sheet has a self-repair function. JP-A-6-278247 discloses the idea of providing a butyl adhesive layer and a reinforcing layer sequentially on an elastic waterproof sheet to provide a self-repair function.
[0005]
[Problems to be solved by the invention]
However, the technique disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 3-32790 is based on the premise that the protective soil on the waterproof sheet is sufficiently compacted. Is performed.
[0006]
Further, in the technology disclosed in JP-A-6-248624 and JP-A-6-278247, even if the waterproof sheet is provided with a self-repair function, there is a limit to this self-repair function, When the tarpaulin is severely torn, it is powerless.
[0007]
An object of the present invention is to provide a waterproof sheet protective material which is easy to construct at a waste disposal site and has an excellent waterproof sheet protecting function, and a construction method thereof.
[0008]
[Means for Solving the Problems]
In order to achieve the above technical object, according to the present invention, there is provided a protective material disposed on a waterproof sheet laid on the ground surface of a waste disposal site, wherein the core is made of a rigid synthetic resin foam. The structure includes a material, a skin material surrounding the core material, and a string means provided at each corner of the skin material.
[0009]
It is preferable that the string means include a loop provided at two corners on one diagonal of the outer skin material and a pair of strings provided at two corners on the other diagonal. In addition, the rigid synthetic resin foam can select an appropriate resin from base resins such as a vinyl chloride resin, a polystyrene resin, and a polypropylene resin, but when the polystyrene resin is selected as the base resin, the density is low. Desirably, it is about 0.10 to 0.02 g / cm ³ . It should be noted that the string means provided at each corner is not limited to the string means provided at the exact corner of the skin material, and is shifted to such an extent that the coupling function is not impaired as shown in FIG. It may be provided near the corner. Further, if the string means is provided on the upper surface of the outer cover material, it is suitable for a case where the connecting operation is performed after disposing the protective material.
[0010]
In addition, the size of the protective material, that is, the size of the core material, is preferably about 900 mm to 10000 mm in vertical dimension and about 400 mm to 3000 mm in horizontal dimension from the viewpoint of workability and transportability. Preferably, the vertical dimension is about 1500 mm to 3000 mm and the horizontal dimension is 600 mm to 1500 mm. Further, the thickness is desirably about 30 mm to 200 mm in order to obtain a suitable shock absorbing property and compressive strength.
[0011]
The rigid synthetic resin foam as the core material may be composed of a single plate material, or may be composed of a plurality of plate materials stacked and thickened. Or may be formed by bundling materials of unspecified shapes.
[0012]
Also, in the construction method of the present invention, a waterproof sheet for a waste disposal site where a large number of interconnected rigid synthetic resin foams are laid on a waterproof sheet laid on the ground surface of the waste disposal site. This is a construction method of a protective material, in which the hard synthetic resin foam is surrounded by a skin material, and a connection between adjacent hard synthetic resin foams is performed by connecting the skin materials . On the other hand, in order to further improve the mechanical strength and chemical resistance of the foam, the foam can be coated with FRP, woven fabric, nonwoven fabric, metal foil, or a non-foamed synthetic resin.
[0013]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a waterproof sheet protective material according to an embodiment of the present invention. The waterproof sheet protective material 1 has a rectangular core material 2 having a thickness, and an outer skin material 3 surrounding the core material 2. On the upper surface of the outer skin material 3, two diagonal corners are provided. , A loop 4 is provided, and a pair of strings 5 are provided at two corners on the other diagonal line, respectively. The loop 4 and the string 5 are attached to a reinforcing band 6 extending around each end of the outer covering 3, and the reinforcing band 6 is firmly fixed to the outer covering 3.
[0014]
The core material 2 is made of a rigid synthetic resin foam, and its base material can be selected from, for example, vinyl chloride resin, polystyrene resin, polypropylene resin, polyethylene resin and the like.
[0015]
The outer skin material 3 is formed by joining a nonwoven fabric or a woven fabric made of a natural or synthetic material, a synthetic resin sheet, a split cloth made of a stretched synthetic resin in a lattice shape, a rubber sheet, or the like by sewing or heat fusion. Is formed into a predetermined shape. In addition, the split cloth is particularly preferable from the viewpoint of drainage. The outer skin material 3 only needs to have a size and a shape in which the core material 2 does not largely move around in the outer skin material 3, and the shape may be a bag shape, or one end or both ends are opened. It may be cylindrical. Specifically, a single foam body is surrounded by the outer skin material 3 as the core material 2, or a plurality of foam bodies are surrounded by being connected or not connected.
[0016]
The loop 4, the string 5, and the reinforcing band 6 attached to the outer cover material may be selected from commercially available ones made of known natural fibers or synthetic fibers, but those having chemical resistance are preferable. Further, the reinforcing band 6 which is formed by simply folding the outer skin material to form a tack is sufficient.
[0017]
As will be described in detail later, the waterproof sheet protective material 1 is disposed on a waterproof sheet laid on the ground surface of a waste disposal site. Therefore, the core material 2 has a correlation with the thickness. However, the density may be determined from the viewpoint of securing weight that does not impair workability and appropriate impact buffering properties and compressive strength. For example, when a polystyrene resin is selected as the base resin, the density is about 0.10 to 0.02 g / cm ³ , and further, about 0.05 to 0.02 g / cm ^{3 in} terms of lightness. preferable. Is preferably in the case of polypropylene resin is the density of about 0.10~0.035g / cm ^3, that in the case of the polyethylene resin is a density of about 0.10~0.04g / cm ³ preferable. If the density is less than these lower limits, compressive strength, there is a possibility that the cushioning against strong force in the sense of protecting the waterproof sheet may be insufficient, while if the density exceeds the upper limit, weight May become too heavy and may reduce workability.
[0018]
The size of the protective material 1 is preferably about 900 mm to 10000 mm in vertical dimension and about 400 mm to 3000 mm in horizontal dimension from the viewpoint of work efficiency and transportability, and further, about 1500 mm to 3000 mm in vertical dimension, and horizontal dimension. Is preferably 600 mm to 1500 mm. Further, the thickness of the protective material 1 is preferably about 30 mm to 200 mm in order to obtain an appropriate shock absorbing property and compressive strength. In order to obtain such an outer dimension of the protective member 1, the core member 2 may be formed of a single plate member, a plurality of plate members may be overlapped, or a plate-like or rod-like foam may be formed. You may be side by side. Further, the core material 2 may be composed of a plurality of unspecified shapes of rigid synthetic resin foam.
[0019]
FIGS. 2 and 3 show a waste treatment plant in which the waterproof sheet protective material 1 is laid. FIG. 2 shows an example in which the protective material 1 is laid entirely. That is, the waterproof sheet 12 is entirely laid on the ground surface of the depression 11 of the waste disposal plant 10 as in the related art. As the waterproof sheet 12, a known waterproof sheet made of vinyl chloride, rubber, polyethylene, polypropylene, ethylene-vinyl acetate copolymer, or the like is used. The waterproof sheet 12 is generally made using a single sheet having a thickness of about 1 to 10 mm, a width of about 1 to 3 m, and a length of about 10 to 40 m. Alternatively, it is made into a size suitable for the concave land 11 by joining by joining means such as heat fusion.
[0020]
The above-described protective material 1 is entirely placed on the waterproof sheet 12 laid in the waste disposal plant 10, and the protective materials 1 adjacent to each other in the horizontal direction and the vertical direction use the loop 4 and the string 5. Are linked. Since the rigid synthetic resin foam 2 which is the main component of the protective material 1 has extremely small water absorption and is lightweight, it is excellent in workability in laying the protective material 1 and excellent in impact resistance and compressive strength. The protection material 1 reduces the weight of the dump truck D that has entered the waste treatment plant 10 and the impact caused by dumping of the waste from the dump truck D, so that the waterproof sheet 12 can be protected.
In addition, since the protective material 1 is made of a foam, even if the ground surface forming the waste disposal site has irregularities and it is difficult to enter a dump truck, the protective material to be laid is not used. In addition, it absorbs irregularities, makes it easier for a dump truck to get in, and makes dumping work easier.
[0021]
In addition, when the protective materials 1 are connected to each other in advance when the protective materials 1 are laid, the linear or planar construction on the waterproof sheet 12 is easy. In addition, connecting the protective members eliminates the risk of displacement of the protective member 1 after construction. Even if the core material 2 is broken due to the waste dumping, the scattering is prevented by being surrounded by the outer cover material 3, so that the performance of the protective material 1 can be maintained for a long time.
[0022]
The protective material 1 may be laid entirely on the waterproof sheet 12 as described above, but may be partially laid on the waterproof sheet 12 as a modified example. This modification is shown in FIG. FIG. 3 shows a structure in which the waterproof sheet 12 at the bottom of the waste treatment plant 10 is filled with sand 14 and the protective material 1 is laid on the side wall surface of the treatment plant 10. In addition, the code | symbol 13 shown in FIG.2 and FIG.3 represents the waste discarded in the processing plant 10. FIG.
[0023]
The construction using the protective material 1 shown in FIG. 1 has been described above. However, a long tubular bag having a length of several meters is used for the waterproof sheet 12, and several hard synthetic resin foams are formed in the bag. What inserted the board in parallel may be laid on the waterproof sheet 12. If the unevenness of the waterproof sheet 12 is not particularly problematic, the adjacent rigid synthetic resin foam plates may be directly fitted and connected to each other and laid directly on the waterproof sheet 12.
[0024]
【The invention's effect】
As is clear from the above description, according to the protective material of the present invention, it is lightweight, has a very small water absorption, etc., so that it can be easily installed at a waste disposal site, and has a sufficient cushioning property to sufficiently provide a waterproof sheet. Since it can be protected, there is no concern about the impact of waste dumping and damage to the waterproof sheet due to the weight of the dump truck. Further, the protective materials connected in large numbers have an effect of absorbing unevenness, and the workability of dumping waste with a dump truck is good. Further, since the rigid synthetic resin foam has a sufficient compressive strength, there is no concern that the protective function such as the buffer effect of the protective material becomes insufficient with time. In addition, since the hard synthetic resin foam as the core material is surrounded by the outer skin material, even if the core material is broken for some reason, the outer skin material is prevented from scattering, so that the protection function of the waterproof sheet is maintained for a long time. be able to. In addition, it is easy to connect the protective materials vertically and horizontally by the outer cover material, and there is no fear that the protective materials are displaced after construction. Furthermore, since the size of the foam surrounded by the outer skin material can be freely adjusted by being overlapped or arranged in parallel in the outer skin material, the length, width, and thickness of the protective material are not particularly required to be bonded. However, it can be changed as needed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a waterproof sheet protective material according to an embodiment of the present invention.
FIG. 2 is a schematic sectional view of a waste treatment plant showing an example of a method of laying a waterproof sheet protective material.
FIG. 3 is a schematic sectional view of a waste disposal site showing another example of a method of laying a waterproof sheet protective material.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Waterproof sheet protective material 2 Core material 3 Outer skin material 4 Loop 5 String 10 Waste treatment plant 11 Ground surface of waste treatment plant 12 Waterproof sheet

Claims (5)

A protective material provided on a waterproof sheet laid on the ground surface of a waste disposal site, comprising a core material made of a hard synthetic resin foam, a skin material surrounding the core material, and A waterproof sheet protective material comprising a string means provided at each corner. The said string means consists of a loop provided in two corners on one diagonal of the said outer skin material, and a pair of string provided in two corners on the other diagonal. Tarpaulin protection material. The rigid synthetic resin foam is a polystyrene resin as a base resin, has a density of 0.10 to 0.02 g / cm ³ , a vertical dimension of 900 mm to 10000 mm, a horizontal dimension of 400 mm to 3000 mm, The waterproof sheet protective material according to claim 1, wherein the thickness is 30 mm to 200 mm. On a waterproof sheet laid on the ground surface of the waste disposal site, a construction method of the waterproof sheet protective material waste treatment plant to lay a large number of hard plastic foam interconnected, the hard synthetic A construction method, wherein a resin foam is surrounded by a skin material, and connection between adjacent hard synthetic resin foams is performed by connecting the skin materials . The rigid synthetic resin foam is a polystyrene resin as a base resin, has a density of 0.10 to 0.02 g / cm ³ , a vertical dimension of 900 mm to 10000 mm, a horizontal dimension of 400 mm to 3000 mm, The construction method according to claim 4, wherein the thickness is 30 mm to 200 mm .

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