JP2000210632A - Waste disposal facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To unnecessitate the construction of cover soil for protecting a water shielding sheet to perform the accumulation of waste to a disposal facility easily and in a relatively short time. SOLUTION: A water shielding sheet 3 is provided along the inner surface of an excavated part 1a of the ground 1, and the surface of the water sheet 3 is covered with a protective layer 21 that is formed by spraying fiber 22 containing sand 23 onto the surface of the sheet 3, and the surface of the layer 21 is covered with a tree planting layer 24 that is formed by spraying fiber 25 containing sand 26 therein, and a protective layer A having light shielding property consisting of the protective layer 21 and the tree planting layer 24 is provided to from a waste disposal facility.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a waste disposal site having a protective layer.

[0002]

2. Description of the Related Art FIGS. 7 to 10 are cross-sectional views showing an example of a waste disposal site for depositing and disposing of industrial waste. Reference numeral 2 denotes a water impermeable layer covering the surface of the excavated portion 1a, 3 denotes a water impermeable sheet laid on the water impermeable layer 2, and 4 denotes a water impermeable sheet laid on the slope 5 of the water impermeable sheet 3. A protective mat 6 for protecting the sheet 3 is a protective sand that is deposited on the bottom 7 side of the impermeable sheet 3 and protects the sheet 3.

[0003] The water-blocking layer 2 is usually composed of a main material such as sand and gravel, a low water-permeable material such as bentonite and kaolin, and a solidified material such as cement for solidifying the mixed material with a mixer. Then, the water-impervious structure material is cast, and this water-impervious structure material is cast to construct a water-impervious layer 2. Excavation part 1a,
The slope 5 is not actually flat, and has irregularities due to deformation of the ground such as rocks as shown in FIGS. 9 and 10.
The impermeable layer 2 is constructed so that the surface becomes flat.

[0004] The water-impervious layer 2 is smoothed, and a water-impervious sheet 3 is laid in close contact therewith.
A protective mat 4 made of non-woven fabric of about 0 mm is laid, and protective sand 6 is put in the mat to complete the waste disposal site. The protection mat 4 has a light-shielding property and prevents heat and ultraviolet rays from reaching the water-blocking sheet 3 to prevent deterioration of the water-blocking sheet 3.

[0005] As shown in FIG. 9, after the waste disposal site is completed, in order to dispose of the waste at this disposal site, the protective mat 4 and the protective sand 6 are filled with protective earth and sand at the corners 8, and the slope is provided. Disposal is carried out while providing the soil 9 along the slope of 5 to a height that allows the building to stand independently without collapse. That is, this covering 9
The surroundings of the protective sand 6 are surrounded by a sharp material such as a square timber 12, a pipe, an angle, or a nail included in the sediment 10 itself, or a heavy machine for leveling the sediment 10 does not damage the impermeable sheet 3. The deposit 10 such as waste is deposited on the protective sand 6 while being protected by the covering soil 9 as described above.

The deposit 10 put on the protective sand 6 is leveled by a heavy machine. However, if the heavy machine comes into contact with the protection mat 4, the water impermeable sheet 3 will be damaged. For this purpose, a cover 9 is provided to protect the water-impervious sheet 3 and work is carried out with heavy equipment.
A deposit 10 is being deposited.

[0007] If the sedimentation is continued, the sediment 10 is likely to exceed the covering soil 9. Therefore, as shown in FIG. After the water sheet 3 is protected, the deposit 10 is deposited. If the sedimentation is continued, the sediment 10 is likely to exceed the covering soil 11. Therefore, the protective earth and sand was put on the covering soil 11 so as to be in contact with the protective mat 4, and the covering soil was further provided to deposit the sediment 10. In this way, the cumbersome work of depositing the deposit 10 by continuously laying the protective earth and sand so as to be higher than the deposit 10 so as to surround the deposit 10 has been performed.

[0008]

According to the conventional waste disposal site, first, it is troublesome to first deposit the covering soil 9, 11 in the process of discarding the sediment 10. Was. Second, the covering soils 9 and 11 have low strength,
In order to carry out the troublesome work of continuously laying the protective earth and sand in an amount that can stand alone and providing thick coverings 9 and 11 so as to be always higher than the sediment 10, the covering 9 , 11 has a disadvantage in that the construction time of the sediment 10 is too long to dispose of in a relatively short time. Third, when the direct sunlight irradiates the water-blocking sheet 3, the water-blocking sheet 3 is denatured by ultraviolet rays and the like included in the direct sunlight, so that the water-blocking performance is not deteriorated. Although the impermeable sheet 3 is covered with the mat 4, the upper portion 13 of the impermeable sheet 3 which is not covered with the soils 9 and 11 may be turned up by small animals such as birds, expansion and contraction due to a change in climate, and the like. There was a drawback that maintenance management of the impermeable sheet 3 was troublesome.

The present invention has been made in order to solve the above-mentioned problem, and it is not necessary to construct the coverings 9 and 11 so that the deposit 10 can be deposited on a disposal site easily and in a relatively short time. In addition, special management for dealing with small animals such as birds, expansion and contraction due to changes in climate, etc. is not required.

[0010]

According to a first aspect of the present invention, there is provided a waste disposal site provided with a water-impervious sheet, wherein fiber-containing sand is blown onto the surface of the water-impervious sheet. The protective layer is attached.

In the waste disposal site according to a second aspect of the present invention, a greening layer formed by spraying fiber-containing sand is formed on the protective layer.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 FIG. FIGS. 1 and 2 are sectional views showing an example of a waste disposal site according to the first embodiment of the present invention, and the same components as those in FIGS. 7 and 10 are denoted by the same reference numerals. In this case, 21 is a protective layer formed by spraying continuous fibers 22 and sand 23 on the surface of the impermeable sheet 3, and 24 is a continuous fiber 25, sand 26 and soil improvement material such as fertilizer sprayed on the protective layer 21. A greening layer 27 attached thereto is a plant vegetated on the greening layer 24. A protective layer 21 is provided on the surface of the water impermeable sheet 3.
And a protective layer A having a light-shielding property and formed from the greening layer 24. The protective layer 21 and the greening layer 24 using the highly light-shielding sands 23 and 26 block light so that direct sunlight does not enter the water-blocking sheet 3, thereby preventing transformation of the water-blocking sheet 3. 3 to prevent the strength of the protective layer 21 and the greening layer 24 from being reduced by mixing the fibers 22 and 25 formed of about 1% polyester with the sands 23 and 26 so as not to deteriorate the water blocking performance. Protects the water-impervious sheet 3 from being damaged when the work is performed on the water-impervious sheet 3 and the deposit 10 such as waste. Fiber 2
By mixing the particles 2 and 25, the particles 23 and 26 are bonded by friction with each other, and the looped and crossed fibers 22 and 25 prevent the relative movement of the particles 23 and 26 to reinforce the strength. are doing.

The protective layer A is constructed in the same manner as in the prior art by laying the water-impervious sheet 3 in a concave shape and putting protective sand 6 on it. 2
Build 4.

A device for spraying the protective layer 21 and the greening layer 24 will be described. As shown in FIG.
26, a compressor for supplying compressed air to the sprayer 31; 33, a hose connected to the sprayer 31 and through which compressed air in which the sands 23 and 26 are mixed;
Is connected to a hose 33 to determine the direction in which the sand 23 and 26 are to be sprayed.
Nozzles for spraying the fibers 3 and 26, 36a are tanks for storing water 36 for blowing the fibers 22 and 25, 37 is a high-pressure pump for increasing the pressure of the water 36, 38 is a hose through which the high-pressure water 36 passes, 39
Is an ejector for mixing the high-pressure water 36 from the hose 38 with the fibers 22 and 25; 40 is a management device for managing the supply amount of the fibers 22 and 25 to the ejector 39; Feeder 41 is wound with high pressure water 36 and fiber 2
Nozzles for blowing 2, 25 are generators for supplying power to the spraying machine 31 and the high-pressure pump 37.

A method of building using a device for spraying the protective layer 21 on the surface of the water-impermeable sheet 3 will be described. As shown in FIG.
The fibers 22 are sprayed from the nozzle 41 onto the same portion of the water-impervious sheet 3 with high-pressure water 36 compressed so as to be mixed with the sand 23 when spraying the upper surface of the water-impervious sheet 3. When the fibers 22 are blown with compressed air, the fibers 22 fly upward, so that a mixture containing water 36 is blown.

Similarly, when the greening layer 24 is sprayed on the protective layer 21, the soil improving material is mixed with the sand 26 by a spraying machine 31 so as to contain nutrients in addition to the sand 26, so that the soil is improved. 26 is applied to the protective layer 21 by adding compressed air from the nozzle 35.
When spraying the fiber 25 from the nozzle 41 together with the high-pressure water 36 to spray the greening layer 24, the surface of the sand 26 is smoothed with a spatula or the like.
Since the fibers 22, 25 are sprayed together with the water 36, they are preferably continuous without any breaks. The greening layer 24 is constructed so that the plant 27 can be grown on the greening layer 24, and is completed as a disposal site.

The protective layer 21 and the greening layer 24 are made of sand 23, 26.
And the fibers 22 and 25 are tightly bonded to each other, so that the strength is stronger than that of the conventional covering soils 9 and 11 and that the slopes 5 do not collapse along the slopes of the slopes 5 and stand alone. It can be covered, and can be built on the slope 5 at a desired thickness in one application without exposing the water-blocking sheet 3.

Because of the strength, the protective layer 21 and the greening layer 24 can be constructed with a thinner layer thickness than the covering soil 9, 11.
Since the layer thickness is small, the capacity for depositing the deposit 10 can be increased.

After the disposal site is completed, as shown in FIG. 5, the deposit 10 is transported by heavy equipment and deposited on the protective sand 6 and the greening layer 24. When the disposal site is completed, the protective layer 21 and the greening layer 24 have been completed before that. Therefore, even if heavy machinery works on the greening layer 24, the waterproofing sheet 3 is not removed by the protective layer 21.
Therefore, there is no need to provide the earth coverings 9 and 11 because the water impermeable sheet 3 is not damaged.

Even if the timber 12 is mixed in the sediment 10, the protective layer 21 and the greening layer 24 have strength. Therefore, even if the timber 12 falls on the greening layer 24, it will pierce the surface of the greening layer 24. Although some of the plants 27 are damaged, the water-blocking sheet 3 is covered with the protective layer 21, so that the tip of the square material 12 does not pierce the water-blocking sheet 3 and is not damaged.

The yield strain of the protective layer 21 and the greening layer 24 is as follows:
It is about 6 to 10%. Compared with the yield strain of only the sands 23 and 26 being 2 to 6%, even when local strain is generated due to uneven settlement or the like, the strain is deformed following this strain. To prevent the impermeable sheet 3 from being exposed.

The water permeability of the protective layer 21 and the greening layer 24 is 1
% Of fibers 22 and 25 are mixed.
It is almost the same as the water permeability of only 3 and 26, and has the same water blocking performance.

In the greening layer 24, since the sand 26 and the fiber 25 are tightly bonded, even if water flows on the surface due to rain, a small part of the sand 26 flows out. Since the inside is protected, it does not collapse along the slope of the slope 5, and the greening layer 24 does not change even if it is exposed for a long time. Further, in the greening layer 24, the roots of the plant 27 are intricately entangled with the fiber 25, thereby increasing the mutual strength. Since the greening layer 24 is provided on the protective layer 21, plants 27 of the same type as the site may be used, and the landscape is not disturbed in conformity with the surrounding landscape.

As shown in FIG. 6, since all of the slope 5 can be covered with sand 23 and 26 having higher light shielding properties than the protection mat 4, even if direct sunlight enters the greening layer 24, the plant
Block the light, and block the light with the sand 26 of the greening layer 24. Therefore, the direct sunlight is absorbed by the greening layer 24, the direct sunlight does not reach the water-blocking sheet 3, the water-blocking sheet 3 is not denatured, the water-blocking performance is not deteriorated, and the water-blocking sheet 3 is kept for a long time. It can exhibit the water blocking performance.

As the sands 23 and 26, purchased sand may be used, or locally generated soil generated when the ground 1 is excavated in a concave shape. The locally generated soil is dried and sandy. The protective layer 21 and the greening layer 24 may be built using the sandy locally generated soil.

When the protective layer 21 is sprayed, the sand 2
When the cement is mixed with the cement 3, the roots of the plant 27 in the greening layer 24 do not enter the protective layer 21 and breakage without entering the plant 27 into the impermeable sheet 3. Never do.

The fibers 22 and 25 for supplementing the strength include, in addition to polyester, nylon, polypropylene, polyvinyl chloride fiber, glass fiber, silicon carbide fiber, carbon fiber, ceramic fiber, steel fiber, polyester, cotton yarn, hemp, One or more or all of rayon, acetate fiber, silk thread, hair, etc. may be used.

As described above, sand 23, 26 having a high light-shielding property, in which fibers 22 and 25 are mixed, is sprayed on the surface of the water-impermeable sheet 3 so that direct sunlight does not enter the water-impermeable sheet 3 so that the protective layer 21 Since the light-shielding protective layer A formed from the greening layer 24 is provided, even if direct sunlight enters, the protective layer 21 and the greening layer 24 block the direct sunlight.
As a result, the water-blocking sheet 3 is not denatured by the ultraviolet rays of sunlight, and the water-blocking performance of the water-blocking sheet 3 can be prevented from deteriorating. In addition, since the protective layer A is provided on the waterproof sheet 3 and the fibers 22 and 25 for reinforcing the strength are mixed with the sands 23 and 26 in the protective layer A, heavy machinery works on the protective layer A. Water barrier sheet 3
Even if the squares 12 enter the sediment 10, the squares 12 can protect the water-impervious sheet 3 without damage.

[0030]

As described above, according to the first aspect of the present invention, since a protective layer formed by spraying fiber-containing sand is applied to the surface of the water-impermeable sheet, the waste material can reach a certain height. Since it is not necessary to deposit cover soil every time soil is deposited, disposal of waste can be performed easily and in a relatively short time, and special considerations for small animals such as birds, expansion and contraction due to climate change, etc. are not required. , Maintenance and management becomes easy.

According to the second aspect of the present invention, a greening layer formed by spraying fiber-containing sand is formed on the protective layer, so that every time waste is deposited to a certain height, soil covering is performed. Since it is not necessary to accumulate waste, waste can be disposed of easily and in a relatively short time, and no special consideration is required for small animals such as birds, expansion and contraction due to climate change, etc. At the same time, vegetation is possible and the surrounding landscape is not destroyed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a waste disposal site according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view showing a configuration of a waste disposal site according to the first embodiment.

FIG. 3 is a block diagram showing an apparatus for spraying a waste disposal site according to the first embodiment.

FIG. 4 is a cross-sectional view showing spraying of a waste disposal site according to the first embodiment.

FIG. 5 is a cross-sectional view in which waste is deposited at a waste disposal site according to the first embodiment.

FIG. 6 is a cross-sectional view of the waste disposal site according to the first embodiment when irradiated with direct sunlight.

FIG. 7 is a sectional view showing a configuration of a conventional waste disposal site.

FIG. 8 is a sectional view showing a configuration of a conventional waste disposal site.

FIG. 9 is a cross-sectional view in which waste is deposited on a conventional waste disposal site.

FIG. 10 is a cross-sectional view in which waste is deposited on a conventional waste disposal site.

[Explanation of symbols]

1 ground, 1a excavated part, 2 water barrier layer, 3 water barrier sheet, 5 slope, 6 protective sand, 21 protective layer, 22 fiber, 23 sand, 24 greening layer, 25 fiber, 26 sand, 2
7 Plant, A protective layer.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor, Satoshi Yokozuka 2-1 Tsukudo-cho, Shinjuku-ku, Tokyo F-term for Kumagaya Gumi Tokyo head office (reference) 4D004 AA46 BB05

Claims (2)

[Claims] 1. A waste disposal site comprising a water-impervious sheet, wherein a protective layer formed by spraying fiber-containing sand is applied to the surface of the water-impervious sheet. 2. A waste disposal site, wherein a greening layer formed by spraying fiber-containing sand is formed on the protective layer.