JP3091995B2 - Waste treatment plant - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste treatment plant having a novel structure, and more particularly, to general waste and industrial waste such as concrete and steel bars from construction sites and large wastes (hereinafter referred to as "large waste"). The present invention relates to a treatment plant for impermeable waste which is suitable to be laid and used so that discharged water and sewage generated at a dump site (hereinafter referred to as a treatment plant) do not penetrate into the underground and groundwater.

[0002]

2. Description of the Related Art Heretofore, this type is as follows. In general, a wastewater treatment plant is provided with a waterproof sheet made of vinyl chloride, rubber, polyethylene or the like so as not to adversely affect underground and groundwater. The use state in this case is performed as follows. First use state-A large amount of earth and sand is laid for protection of the side wall and protection of the waterproof sheet at the bottom. From the second use state to being left as it is until the garbage is carried in, the impermeable sheet is exposed.

[0003]

The above-mentioned prior art has the following problems. First
The state of use of ~ ~ dumping area will be greatly reduced. Second
When the water impermeable sheet is left exposed for several years, the water impermeable sheet is weak to ultraviolet rays, which causes a deterioration phenomenon, which may be broken by a machine or the like when carrying in earth and sand. Even if earth and sand are laid on the water-blocking sheet that has been broken in this way, the water-blocking sheet is damaged, and the discharged water and sewage penetrate into the underground and underground water, causing serious pollution and eventually destruction of the natural environment become. The present application has been made in view of such problems of the conventional technology, and an object of the present invention is to provide a device that can solve the above-described problems.

[0004]

Means for Solving the Problems In order to achieve the above object, the present invention is as follows. The first invention is a waste treatment plant comprising the following recesses 2 for a treatment plant, a waterproof sheet 3, a waterproof sheet protective mat 4, and earth and sand 5. A. The recess 2 for the treatment plant includes a bottom surface 2A, front and rear wall surfaces 2B and 2C connected to the front and rear of the bottom surface, and left and right wall surfaces 2D and 2E connected to the left and right.
An embankment edge 2 </ b> F is formed on the outer periphery of the treatment plant recess 2. B. The water-blocking sheet 3 is made of a sheet of vinyl chloride, polyethylene, carbon, rubber, or the like, and is laid on the upper surface of the bottom surface 2A, the front and rear wall surfaces 2B and 2C, and the left and right wall surfaces 2D and 2E in the treatment plant cavity 2. I have. C. The water-impervious sheet protective mat 4 is provided with an upper end of the water-impervious sheet protective mat 4 on the front and rear wall surfaces and the left and right wall surfaces of the water-impervious sheet 3 laid on the inner surface of the treatment plant recess 2. In a state of covering the edge 2F of the portion 2 and the lower end reaching the bottom surface 2A of the recess 2 for the treatment plant, the two portions are connected in a side-by-side manner so that there is no gap while using one of the surface fasteners 4B and 4C. ing. D. The strength condition of the waterproof sheet protective mat 4 is a standard value of 15 mm, the density is 0.2 g / cm ³ or more, and the tensile strength is 2
0.0kgf / cm ² or more, compressibility 4.4% or less, chemical resistance 95.0% or more, elongation 180.0% or more,
The penetration resistance is 350 kgf or more, and the strength condition of one of the surface fasteners 4B and 4C is a standard value, and the tensile shear strength (kgf / cm ² ) is just 4.0 or more, and weft 4.
5 or more, the base metal tensile strength (kgf / cm ² )
In the case of a one-sided fastener with a group of hooks,
In the case of the other side fastener in which the loops are grouped, the length is 17.5 or more, the width is 45.0 or more, and the width is 55.0 or more.
5.0 or more. E. FIG. The earth and sand 5 is spread over the upper surface of the bottom surface 2A with a predetermined thickness. The second invention is directed to the following pit 2 for a treatment plant, a water-blocking sheet 3, a water-blocking sheet protection mat 6 for a bottom surface, a water-blocking sheet protection mat 7 for a side, and a waste material composed of earth and sand. It is a processing plant. A. The recess 2 for the treatment plant includes a bottom surface 2A, front and rear wall surfaces 2B and 2C connected to the front and rear of the bottom surface, and left and right wall surfaces 2D and 2E connected to the left and right.
An embankment edge 2 </ b> F is formed on the outer periphery of the treatment plant recess 2. B. The water-blocking sheet 3 is made of a sheet of vinyl chloride, polyethylene, carbon, rubber, or the like, and is laid on the bottom surface 2A, the front and rear wall surfaces 2B and 2C, and the left and right wall surfaces 2D and 2E of the treatment plant recess 2. C. The bottom surface impermeable sheet protective mat 6 is provided in parallel with the bottom surface of the impermeable sheet 3 laid on the inner surface of the treatment plant recess 2, in the width direction, one of the surface fasteners 6 </ b> B and the other 6 </ b> C, and in the longitudinal direction. One side of hook-and-loop fastener 6D
It is connected and stretched so that there is no gap using the other and 6E. D. The side water-impervious sheet protection mat 7 is provided on the front and rear wall surfaces and the left and right wall surfaces of the water-impervious sheet 3 laid on the inner surface of the treatment plant indentation 2, and the upper end of the side water-impervious sheet protection mat 7 is a treatment plant indentation. The edge 2F of the portion 2 is covered, and the lower end reaches the upper surface of the end of the bottom waterproofing sheet protection mat 6 stretched in advance, and the gap is formed while using one of the surface fasteners 7B and the other 7C in a parallel state. It is stretched and connected so as not to have. E. FIG. The strength condition of the waterproof sheet protective mat 6 for the bottom and the waterproof sheet protective mat 7 for the side is a standard value of 15 mm, the density is 0.2 g / cm ³ or more, and the tensile strength is 20.0 kgf /.
cm ² or more, compression ratio 4.4% or less, chemical resistance 95.
0% or more, elongation percentage is 180.0% or more, penetration resistance is 35
0kgf or more, and one of the fasteners 6B, 7B
On the other hand, the strength conditions of 6C and 7C are standard values, and the tensile shear strength (kgf / cm ² ) is at least 4.0, and the width is 4.5.
As described above, the base material tensile strength (kgf / cm ² ) is 1 in the case of a one-sided fastener having a group of hooks.
In the case of the other side fastener in which the loops are grouped, the length is 17.5 or more, the width is 45.0 or more, and the width is 55.0 or more.
5.0 or more. F. Earth and sand are spread to a predetermined thickness on the upper surface of the laid bottom water-impervious sheet protection mat 6.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to the drawings. Reference numeral 1 denotes a waste treatment plant according to the first aspect of the present invention, which comprises a treatment plant recess 2, a water-blocking sheet 3, a water-blocking sheet protection mat 4, and earth and sand 5. The recess 2 for the treatment plant includes a bottom surface 2A, front and rear wall surfaces 2B and 2C connected to the front and back of the bottom surface, and left and right wall surfaces 2D and 2C connected to the left and right.
2E. An embankment edge 2 </ b> F is formed on the outer periphery of the treatment plant recess 2. The water-blocking sheet 3 is made of a sheet made of vinyl chloride, polyethylene, carbon, rubber, or the like, and has a bottom surface 2A, front and rear wall surfaces 2B and 2C, and left and right wall surfaces 2D and 2E in the treatment plant cavity 2.
It is laid on the upper surface of. After directly fixing the upper end of the impermeable sheet 3 with the anchor 3A as shown in FIG. 5, earth and sand are backfilled and fixed. The water-impervious sheet protective mat 4 is provided with an upper end of the water-impervious sheet protective mat 4 on the front and rear wall surfaces and the left and right wall surfaces of the water-impervious sheet 3 laid on the inner surface of the treatment plant recess 2. In a state of covering the edge 2F of the portion 2 and the lower end reaching the bottom surface 2A of the recess 2 for the treatment plant, the two portions are connected in a side-by-side manner so that there is no gap while using one of the surface fasteners 4B and 4C. ing. The earth and sand 5 is spread over the upper surface of the bottom surface 2A with a predetermined thickness.

The waterproofing sheet protective mat 4 is made of a non-woven fabric mat and a fiber mat (organic, for example, hardly corroded).
A mat body 4A for a side formed in a strip shape slightly longer than the height of each wall surface in the recess 2 for a treatment plant, using a material having good chemical resistance that does not contain rotten things such as wool, cotton, and hemp.
One side 4B of the surface fastener attached to the lower surface of the left side of the side mat body, the other 4C of the surface fastener attached to the upper surface of the right side, and a center near the upper end of the side mat body 4A. And eyelets 4D.
In this case, when the water-impervious sheet protective mats 4 are connected in a row, the other surface fasteners 4C of the water-impervious sheet protective mat 4 located on the left and the surface fasteners of the water-impervious sheet protective mat 4 located on the right. 4B will be engaged. The hook-and-loop fastener has the same structure as that of a known Velcro (registered trademark). Further, the upper end of the waterproof sheet protective mat 4 is connected to an anchor 4D2 which is cast on the edge 2F via a rope 4D1 such as a nylon rope at the eyelet 4D. In addition, about the fixing method of the upper end of this water-impervious sheet protection mat 4, as shown in FIG.
May be fixed directly by the anchor 4D2, and then backfilled with earth and sand and fixed.

Reference numeral 11 denotes a waste treatment plant according to the second aspect of the present invention. The treatment plant depression 2, the water-impervious sheet 3, the bottom water-impervious sheet protection mat 6, the side water-impervious sheet protection mat 7, It is composed of earth and sand. The recess 2 for the treatment plant
A and front and rear wall surfaces 2B, 2 which are continuously provided before and after this bottom surface.
C and left and right wall surfaces 2D and 2E connected to the left and right. An embankment edge 2 </ b> F is formed on the outer periphery of the treatment plant recess 2. The water-blocking sheet 3 is made of a sheet of vinyl chloride, polyethylene, carbon, rubber, or the like, and is laid on the bottom surface 2A, the front and rear wall surfaces 2B and 2C, and the left and right wall surfaces 2D and 2E of the treatment plant recess 2. An anchor 3A is attached to the upper end of the impermeable sheet 3 as shown in FIG.
After fixing directly with, backfill the earth and sand and fix. The bottom surface impermeable sheet protection mat 6 has one side fastener 6B and the other 6C in the width direction in parallel with the bottom surface of the impermeable sheet 3 laid on the inner surface of the treatment plant recess 2 in the width direction.
In the longitudinal direction, one of the hook-and-loop fasteners 6D and the other 6E are provided.
It is stretched and connected so that there is no gap while using. The side water-impervious sheet protection mat 7 is provided on the front and rear wall surfaces and the left and right wall surfaces of the water-impervious sheet 3 laid on the inner surface of the treatment plant indentation 2, and the upper end of the side water-impervious sheet protection mat 7 is a treatment plant indentation. The edge 2F of the portion 2 is covered, and the lower end reaches the upper surface of the end of the bottom waterproofing sheet protection mat 6 stretched in advance, and the gap is formed while using one of the surface fasteners 7B and the other 7C in a parallel state. It is stretched and connected so as not to have. (See FIG. 11) Earth and sand (similar to the case of the first invention, but not shown) is spread over the upper surface of the laid bottom water-impervious sheet protection mat 6 to a predetermined thickness.

[0008] The bottom waterproofing sheet protective mat 6 is made of a non-corrosive non-woven mat and a fibrous mat (having good chemical resistance and not containing organic substances such as wool, cotton and hemp). The bottom mat body 6A having the same width as the width of the water-impervious sheet protection mat 7 and having a predetermined length in a band shape, and a hook-and-loop fastener attached to the lower surface on the left side of the bottom mat body. On the other hand, it is composed of 6B, the other surface fastener 6C attached to the upper surface on the right side, and one 6D of the surface fastener attached to the front lower surface and the other 6E of the surface fastener attached to the rear upper surface.
It is composed of Note that one of the surface fasteners and the other of the surface fasteners in the bottom water-impervious sheet protection mat 6 have the same structure as one of the surface fasteners 7B of the side-surface water-impervious sheet protection mat 7 and the other 7C of the surface fastener. It is. Bottom waterproof sheet protection mat 6
It is also possible to configure the sheet to have a single width A.
Non-woven mats and fiber mats (organic ones such as hair,
A side mat body 7A, which is made of a material having good chemical resistance and does not contain rotten things such as cotton and hemp, and is formed in a belt shape slightly longer than the height of each wall surface in the recess 2 for the treatment plant; Of the hook-and-loop fastener attached to the lower surface of the left side, the other 7C of the hook-and-loop fastener attached to the upper surface of the right side, and an eyelet 7D attached to the center near the upper end of the side mat body 7A. ing. In addition,
The upper end of the side surface impermeable sheet protection mat 7 is connected to an anchor 7D2 that is cast on the edge 2F via a rope 7D1 such as a nylon rope at the eyelet 7D. In addition, regarding the method of fixing the upper end of the side impermeable sheet protection mat 7, as shown in FIG. 13, the upper end of the side impermeable sheet protection mat 7 is directly fixed by the anchor 7D2 without using the cord 7D1. Alternatively, the earth and sand may be backfilled and fixed.

The conditions of the waterproof sheet protective mat 4, the waterproof sheet protective mat 7 for the side face, and the waterproof sheet protective mat 6 for the bottom face will be described. Mats currently used (removable felt, non-woven fabric, fiber, etc.) are those of any standard value based on the JIS L 3204 anti-hair felt standard value and the test method of JIS L 1085, and various types of civil engineering. Used for construction. In the case of industrial waste, it is used as a cushioning material on the back side of the seepage control sheet, and the surface of the seepage control sheet seems to have very few use cases for the purpose of preventing damage from ultraviolet rays and protective soil, The quality of the mats,
Thickness, strength, etc. were not used based on loading experiments or test construction in treatment plants, and also seemed to be appropriate for mat connection. The mat of the present application tested 10 mm and 15 mm in the loading test, and as a result,
Since a 5 mm mat was good, a 15 mm mat was laid on the surface of the slope where the water-impermeable sheet was stretched in the test construction at the treatment plant. This result was also put to practical use, as it was good as a result of a situation survey and the like. Note that the standard value of the waterproofing sheet protective mat of 15 mm according to the present invention is based on the test method JIS L 3204 (anti-hair felt), but is much larger than the standard value of JIS L 3204. Shown below. Standard value of 15 mm for waterproof sheet protective mat 1. Density 0.2 g / cm ³ or more 2. Tensile strength 20.0 kgf / cm ² or more 3. Compression rate 4.4% or less Chemical resistance 95.0% or more 5. Elongation 180.0% or more Penetration resistance: 350 kgf or more In the penetration resistance test, the JIS L 1096B method (constant speed elongation method) 100 mm / min does not break even at 500 kgf.
S-101B-Method2065 About 500mm / m
in)). Further, in order to increase the penetration resistance in the future, the above standard value may be increased or decreased and changed. As described above, the waterproofing sheet protective mat of the present application has a standard value set, but it is assumed that mats based on other test methods include those having a value equal to or higher than the standard value. The material of the mat is 100% synthetic fiber which is hard to corrode (does not contain organic matter such as wool, cotton, and hemp). To explain a little about the corrosion here, corrosion is a major enemy because the mat is used for a long time or used permanently. Corrosion makes it impossible to meet the above-mentioned standard values of mats, makes it impossible to withstand the load of garbage deposited for many years, not only damages the impermeable sheet, but also generates sewage due to the corrosion of the mats and causes May infiltrate groundwater and cause serious pollution. Mats currently in practical use include 100% polyester with good weather resistance and UV resistance
Is used, but a material that clears the standard value of the material for the waterproofing sheet protective mat may be used. In addition, the polyester currently used is mainly made of residual material from commercialized products, and if it is discarded, it is recycled as industrial waste. New yarn is used depending on the increase in In addition, in order to reinforce or reinforce the penetration resistance, a woven fabric, a knitted fabric, a film, a long fiber, or another reinforcing material that does not damage the water barrier sheet may be used. The thickness was 15m which was good in loading test and test construction.
m is standard, however, depending on the application, for example, when protection from ultraviolet rays or garbage is desired, the thickness may be thinner than 15 mm, and the standard value may be lower than the above standard value. Naturally, it is a synthetic fiber. When laying on the bottom of the treatment plant, a mat thicker than 15 mm is used due to the volume load of dust and the like, but the standard value naturally exceeds the standard value. The mat-to-mat joint does not destroy the impermeable sheet,
Any method may be used as long as no gap is opened between the mats.

One of the surface fasteners 4B, 6B, 6D, 7
B and the other conditions of 4C, 6C, 6E, and 7C will be described. In the test construction of the waterproofing sheet protection mat of the present application, one and the other of the hook-and-loop fastener sewn and fixed to the waterproofing sheet protection mat beforehand were used for joining, but experienced rolling compression with a bulldozer, etc. ,
There is no abnormality in mat-to-mat joints, the condition is good, and the workability of joining is good, so use surface fasteners with the following standard values, but clear the standard values for other surface fasteners Should be fine. The standard values of one and the other of the surface fastener are as follows. 1. 1. Tensile shear strength (kgf / cm ² )-fresh 4.0 or more, horizontal 4.5 or more Base material tensile strength (kgf / cm ² ) B. One-way fastener (male) with hooks grouped: 19.0 or more, 55.0 or more. In the case of the other side fastener (female) in which the loops are grouped, the length is 17.5 or more, the width is 45.0 or more. The test method is based on JIS L 3416 (surface fastener).

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, a waterproof sheet protective mat 4, a waterproof sheet protective mat 6 for the bottom face, and a waterproof sheet protective mat 7 for the side face
Specific dimensions and the like will be described. 1. As for the size in the longitudinal direction of each of the water-impervious sheet protection mats, those actually used are often 3 to 10 m, but if there is no problem in construction, 25 to 30 m may be used. 2. The dimension in the short direction of each water-impervious sheet protection mat is actually 2 m, but may be 3 to 4 m to improve workability. 3. The thickness of each waterproof sheet protective mat is 10m in the experiment.
m and 15 mm, but actually 15 mm
It was used. However, this also depends on the type of garbage, etc.
It may be used up to about 50 mm. Currently used mats having the above strength are manufactured at a subcontract factory of Taiyo Kogyo Co., Ltd., and the hook-and-loop fastener uses Kuraray industrial magic tape (trademark).

[0012]

Since the present invention is configured as described above, the following effects can be obtained. 1. According to the present invention, not only a new treatment plant but also an existing treatment plant (a place where the impermeable sheet has already been stretched and exposed)
It can also be used in garbage disposal sites that use mountains, mountains, and swamps. 2. It can also be used in places other than refuse disposal sites where it is desired to prevent things such as sheets from breaking and chemical liquids and sewage from penetrating. 3. By protecting the impermeable sheet inside the treatment plant from external impacts such as ultraviolet rays and large garbage, it is possible to prevent the permeation of discharged water etc. and to simplify the maintenance and management of the treatment plant operator. it can. 4. Originally, the original form of the mat of the present application is JIS L320
4 Mainly made of Class 3 synthetic fiber, used for civil engineering and agricultural purposes (for example, used to prevent uneven settlement under a river block), but directly to a garbage disposal plant There were many points that were unsuitable for various conditions for use, and as a result of repeated improvements, good results described elsewhere were obtained. JIS L
3204 (Anti-wool felt) The third type of material is mainly made of synthetic fibers, but the remaining fibers often contain organic materials such as wool, cotton, and hemp. Since it is used permanently in a garbage disposal plant, synthetic fiber 1 is used except for materials that decompose to promote sewage and reduce quality such as the strength of the mat itself.
00% (for example, 100% polyester). In addition, not only corrosive materials but also sharp materials that damage large garbage and sheets such as concrete residue and steel bars from construction sites are brought into the treatment plant.
L 3204 (Reflex Wool Felt) also has to be strengthened with respect to penetration resistance without quality regulations. As a result, the density, compression ratio, etc. were revised upward as much as possible, and as a result, JIS L 3204 (Reflex Wool Felt) was commercially available. ) Third
Several times the intensity could be obtained depending on the specific values of the species. It was tested and constructed at the treatment plant, and the situation was investigated. The sheet was not damaged and good results were obtained. The result at this treatment plant was considered as the minimum safety value of the waterproofing sheet protective mat used at the garbage treatment plant, and was set as the minimum safety standard value of the mat of the present invention. The magic tape (surface fastener) used to connect the mats is not generally used, which is equivalent to the standard value of JISL 3416 (surface fastener), but has been commercialized for civil engineering and industrial use. Was tested and constructed in a treatment plant, and the result was good. Therefore, the minimum safety standard value of the hook-and-loop fastener used as an accessory of the mat of the present application was determined similarly to the mat.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a recess for a treatment plant.

FIG. 2 is a partially cutaway perspective view of the first invention.

FIG. 3 is a perspective view of a waterproof sheet protective mat.

FIG. 4 is an enlarged sectional view taken along line AA.

FIG. 5 is an enlarged sectional view taken along line BB.

FIG. 6 is a partially cutaway perspective view of the second invention.

FIG. 7 is a perspective view of a bottom surface impermeable sheet protection mat.

FIG. 8 is an enlarged sectional view taken along line CC.

FIG. 9 is an enlarged cross-sectional view illustrating a connection state in a longitudinal direction of the water-blocking sheet protective mat for a bottom surface.

FIG. 10 is a perspective view of a side surface impermeable sheet protection mat.

FIG. 11 is an enlarged sectional view taken along line DD.

FIG. 12 is an enlarged sectional view taken along line EE.

FIG. 13 is an enlarged cross-sectional view illustrating another example of construction of an anchor portion at the upper end of a side surface impermeable sheet protection mat.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waste treatment plant 2 Recess for treatment plant 3 Waterproof sheet 4 Waterproof sheet protection mat 5 Sediment 11 Waste treatment plant 6 Waterproof sheet protection mat for bottom 7 Waterproof sheet protection mat for side

Claims (2)

(57) [Claims] 1. Disposal characterized by comprising the following recesses for a treatment plant (2), a seepage control sheet (3), a seepage control sheet protection mat (4), and earth and sand (5). Disposal site. A. The dent portion (2) for the treatment plant is composed of a bottom surface (2A), front and rear wall surfaces (2B, 2C) connected to the front and rear of the bottom surface, and left and right wall surfaces (2D, 2E) connected to the left and right. In addition to the above configuration, an edge (2F) buried in the soil is formed on the outer periphery of the recess (2) for the treatment plant. B. The water-impervious sheet (3) is made of a sheet of vinyl chloride, polyethylene, carbon, rubber, or the like, and has a bottom surface (2A) and front and rear wall surfaces (2A) in the treatment plant recess (2).
B, 2C) and the upper surfaces of the left and right wall surfaces (2D, 2E). C. The water-impervious sheet protection mat (4) is provided on the front and rear wall surfaces and the upper surface of the left and right wall surfaces of the water-impervious sheet (3) laid on the inner surface of the treatment plant recess (2). ) Is at the edge (2) of the recess (2) for the treatment plant.
F), and the lower end is the bottom surface (2) of the recess (2) for the treatment plant.
A) When one of the hook-and-loop fasteners (4
It is stretched and connected so that there is no gap using B) and the other (4C). D. The strength condition of the waterproof sheet protective mat (4) is 15m.
m, the density is 0.2 g / cm ³ or more, the tensile strength is 20.0 kgf / cm ² or more, the compressibility is 4.4% or less, the chemical resistance is 95.0% or more, and the elongation is 180. 0.0%
As described above, the penetration resistance is 350 kgf or more, the strength condition of one (4B) and the other (4C) of the surface fastener is a standard value, and the tensile shear strength is 4.0 kgf / cm ² or more. 4.5 kgf / cm ² or more, and the tensile strength of the base material is 19.0 kgf / cm ² or more in the case of a one-sided fastener in which hooks are grouped, and the width is 55.0 k.
In gf / cm ² or more, in the case of the other surface fastener loop is Gun設, vertical 17.5kgf / cm ² or more and the horizontal 45.0kgf / cm ² or more. E. FIG. The earth and sand (5) is spread over the upper surface of the bottom surface (2A) with a predetermined thickness. 2. An indentation (2) for a treatment plant, a water-impervious sheet (3), and a water-impervious sheet protective mat (6) for a bottom surface as described below.
A wastewater treatment plant comprising: a water-impervious sheet protective mat (7) for side surfaces; and earth and sand. A. The dent portion (2) for the treatment plant is composed of a bottom surface (2A), front and rear wall surfaces (2B, 2C) connected to the front and rear of the bottom surface, and left and right wall surfaces (2D, 2E) connected to the left and right. In addition to the above configuration, an edge (2F) buried in the soil is formed on the outer periphery of the recess (2) for the treatment plant. B. The water-impervious sheet (3) is made of a sheet of vinyl chloride, polyethylene, carbon, rubber, or the like, and has a bottom surface (2A) and front and rear wall surfaces (2A) in the treatment plant recess (2).
B, 2C) and left and right wall surfaces (2D, 2E). C. The bottom surface impermeable sheet protection mat (6) is arranged in parallel with the bottom surface of the impermeable sheet (3) laid on the inner surface of the treatment plant recess (2), and one side (6B) of the surface fastener and the other in the width direction. In addition, in the longitudinal direction, (6C) is connected and stretched without using a gap while using one (6D) and the other (6E) of the hook-and-loop fastener. D. The side surface impermeable sheet protection mat (7) is provided on the front and rear wall surfaces and the left and right wall surfaces of the impermeable sheet (3) laid on the inner surface of the treatment plant recess (2). ) Is at the edge (2) of the recess (2) for the treatment plant.
F), and one end (7B) and the other (7C) of the hook-and-loop fastener are used in parallel with the lower end reaching the upper surface of the end of the waterproofing sheet protection mat for bottom surface (6) stretched earlier. It is connected and stretched without gaps. E. FIG. The strength of the waterproofing sheet protective mat for the bottom surface (6) and the waterproofing sheet protective mat for the side surface (7) is a standard value of 15 mm, the density is 0.2 g / cm ³ or more, and the tensile strength is 20.0.
kgf / cm ² or more, compressibility 4.4% or less, chemical resistance 95.0% or more, elongation 180.0% or more, penetration resistance 350 kgf or more, and one of the surface fasteners (6B in strength conditions standard value of 7B) the other (6C, 7C), the tensile shear strength, vertical 4.0 kgf / cm ² or more, lateral 4.5 kgf / cm ² or more, the base material tensile strength Is 19.0 kgf / cm ² or more in the case of a one-sided fastener having a group of hooks,
In kgf / cm ² or more, in the case of the other surface fastener loop is Gun設, vertical 17.5kgf / cm ² or more and the horizontal 45.0kgf / cm ² or more. F. Earth and sand are laid to a predetermined thickness on the upper surface of the laid bottom waterproof sheet protection mat (6).