JPH10277514A - Protection structure of impermeable sheet in waste disposal site - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent damage to the impermeable sheet and to use protective sand even when running or turning a heavy machine upward to spread waste. Provided is a protection structure for a seepage control sheet in a waste disposal site that can be installed quickly and easily without any need. SOLUTION: A protection structure 1 for protecting a seepage control sheet 11 laid on a bottom ground 20 of a waste disposal site 30.
0, and heavy machinery and waste 3
The protective block 13 has a strength not to be damaged by an overload by 1 or the like and is arranged vertically and horizontally. In addition, the protection block 13 has
When the protection blocks 13 are connected vertically and horizontally, they communicate with each other to form a drain passage 1 between the protection block 13 and the impermeable sheet 11.
6 is provided with a concave groove 14 or a notch 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for protecting a seepage control sheet in a waste disposal site, and more particularly to a protection structure for a seepage control sheet using a protection block.

[0002]

2. Description of the Related Art For example, landfill-type waste disposal sites for dumping industrial waste and general waste are disposed in a concave ground formed by utilizing natural terrain or excavating the ground. It is to be landfilled and stored, but it is mandatory to implement a seepage control in advance on the bottom ground of the disposal site in order to prevent environmental pollution due to the infiltration of sewage leached from landfill waste into the ground. I have.

[0003] As such a water-blocking work, conventionally, a method of laying a soft synthetic resin-based or rubber-based water-blocking sheet is known from the viewpoint of economy and water-blocking.

Further, according to the seepage control using such a seepage control sheet, such a seepage control sheet is liable to be damaged or damaged by a projection or the like in the waste dumped at a disposal site. Therefore, it is necessary to protect the top of this,
Conventionally, as a method for protecting the water-impervious sheet, as shown in FIG. 9, a protection mat 51 using, for example, a nonwoven fabric is laid on the upper surface of a water-impervious sheet 50 laid on the bottom ground 52 of a disposal site, as shown in FIG. Thereafter, a method has been adopted in which the upper portion is further covered with a protective sand 53 made of sand or sediment with a small amount of rake to a thickness of, for example, about 50 to 100 cm to protect it from waste.

[0005]

However, according to the above-mentioned conventional protection structure for protecting the water-impervious sheet, the work of rolling out and laying the protective sand on the water-impervious sheet using a heavy equipment or the like is performed. In some cases, the sheet may be damaged by the movement or turning of the heavy equipment, and even during the landfill work of the waste, depending on the way the heavy equipment travels, the waste may pass through the protective sand and damage the impermeable sheet. In some cases, there has been a problem that considerable attention must be paid to the construction management to avoid such a situation.

[0006] In addition, a large amount of high-quality sand containing a small amount of rubble is required, and if the bottom surface is inclined, the protective sand laid down during rainfall may be washed away, and the work may be repeated. There were challenges.

Therefore, the present invention has been made in view of the above-mentioned conventional problems. Even when a heavy machine is run or turned upward in order to spread the waste or the like, it is possible to prevent the waterproof sheet from being damaged. An object of the present invention is to provide a protection structure of a seepage control sheet in a waste disposal site, which can be easily avoided and can be quickly and easily installed without particularly using protective sand.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and its gist is that it is installed on the bottom ground of a waste disposal site and drains water from the inside of the disposal site to the surrounding ground. Is a protective structure for protecting the water-impervious sheet that prevents leakage, and on the upper surface of the water-impervious sheet, vertically and horizontally, a number of protective blocks having strength not to be damaged by an overload due to heavy equipment or waste. A protection structure for a seepage control sheet in a waste disposal site characterized by being connected and arranged.

Here, the strength of the protective block, which is not damaged by the overload due to heavy equipment, waste, etc., refers to, for example, a compressive strength of about 20 kgf / cm ² or more.
Further, the thickness and the plane size of the protection block can be appropriately set in consideration of workability, load conditions, transportation conditions, and the like.

The protection structure according to the present invention is further characterized in that the protection block is formed on the bottom surface of the protection block so as to communicate with each other when the protection block is vertically and horizontally connected, thereby forming a drainage channel between the protection block and the impermeable sheet. Alternatively, a notch is preferably provided.

Further, the protection structure according to the present invention is characterized in that the protection blocks connected in a vertical and horizontal direction prevent waste from entering a connection portion between adjacent protection blocks from a gap between the connection portions. It is also possible to provide trimming.

Further, in the protective structure according to the present invention, the protective block has an uneven surface around it, and connects a plurality of protective blocks vertically and horizontally while connecting adjacent protective blocks so that the convex surface is fitted to the concave surface. It can also be arranged to be connected.

Still further, in the protective structure according to the present invention, the protective block has a plane rectangular shape or a square shape, is divided into two layers in a thickness direction, and an upper layer portion is diagonally parallel to a lower layer portion. By being moved, the lower layer portion has a shape including a pair of first side portions projecting laterally, and a pair of second side portions located at diagonal portions thereof and the upper layer portion projecting laterally. The protective blocks are connected to each other while a large number of the protective blocks are overlapped on the supporting surface with the upper surface of the first side as a supporting surface and the lower surface of the second side as a supported surface. It can also be laid vertically and horizontally.

The protection structure according to the present invention is further characterized in that a notch is provided in a peripheral portion of an upper surface of the protection block, and when the protection block is vertically and horizontally connected, a notch formed by a notch of a pair of adjacent protection blocks. Preferably, the space is provided.

Further, in the protective structure according to the present invention, a water-permeable protective block may be used as the protective block.

According to the protection structure of the waterproof sheet of the present invention, since each protective block has the strength not to be damaged by the overload due to heavy equipment or waste, it is connected vertically and horizontally on the waterproof sheet. Once the work is done, dumping and other heavy equipment can be run to immediately dump waste and landfill work, and protection block laying work is done by laying out protection blocks At the same time, since the waste does not penetrate through the laid protection block, it is possible to easily prevent the water impermeable sheet from being damaged.

Further, according to the protection structure for a water-impervious sheet of the present invention, the protective block communicates with the water-impervious sheet when the protective block is vertically and horizontally connected to the bottom surface thereof, thereby providing a space between the protective block and the water-impermeable sheet. By providing a concave groove or a notch that forms a drain passage, a drain function is provided, and at a connection portion of an adjacent protection block,
If a space is provided to prevent waste from entering the space below the connection portion, clogging of the drainage channel can be prevented, and the drainage function can be easily maintained for a long time. Become.

Further, if a plurality of protective blocks are arranged vertically and horizontally in a row while providing an uneven surface around the protective block and connecting the adjacent protective blocks so that the convex surface is fitted to the concave surface. Using the convex surface or the concave surface as a guide, the connecting and arranging operation in the vertical and horizontal directions can be easily performed, and the installed protective block can be easily prevented from being displaced due to running of heavy equipment.

On the other hand, in the protective structure according to the present invention, the protective block has a plane rectangular shape or a square shape, is divided into two layers in the thickness direction, and the upper layer portion is moved diagonally with respect to the lower layer portion in a diagonal direction. By doing so, the lower layer portion is located on a pair of first side portions projecting sideways and diagonal portions thereof,
When the upper layer portion has a shape including a pair of second side portions protruding laterally, a large number of the protection blocks, the upper surface of the first side portion as a supporting surface, and the lower surface of the second side portion It becomes possible to connect and connect adjacent protective blocks easily and vertically and horizontally while superimposing them on the supporting surface as a supported surface.

In the protective structure according to the present invention, a notch is provided in a peripheral portion of the upper surface of the protective block, and when the protective blocks are connected vertically and horizontally, a concave groove is formed by the notch of a pair of adjacent protective blocks. By filling the grooves, the filling material can be stably provided at the connection portion.

Further, if a water-permeable material is used as the protective block, the drainage function of the protective structure can be more easily secured.

Furthermore, the protection blocks can be easily laid out even when the bottom ground has an inclination, and the laid protection blocks are not washed away by rain.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention, that is, embodiments, will be described below in detail with reference to the accompanying drawings. As shown in FIG. 1, a water-impervious sheet protection structure 10 according to a first embodiment of the present invention is, for example, a waste disposal site created by excavating and leveling a large site in a mountainous area or the like in a concave shape. 30 is provided to protect the seepage control sheet 11 laid so as to cover the bottom ground 20 including the slope.

The protection structure 10 for a water-impervious sheet according to the first embodiment, as shown in an enlarged view in FIG. , And is constituted by a number of protective blocks 13 which are connected vertically and horizontally to cover the upper surface thereof.

Here, the protection block 13 has a thickness of, for example, about 5 to 15 cm and a side length of 40 to 200 cm.
3 is a precast concrete member having a square shape as shown in FIG. 3 and having a compressive strength of, for example, about 20 kgf / cm ² and a strength not to be damaged by an overload due to heavy equipment or waste. It is.

As shown in FIG. 2, the protection block 13 has two bottom rows of arc-shaped bottom grooves 14 in the vertical and horizontal directions on the bottom surface and a bottom notch 15 on the peripheral edge. When a large number of are arranged vertically and horizontally, they communicate with each other to form a drain passage 16 between the water-blocking sheet 11 and the protection block 13.

Further, according to the protection structure 10 of this embodiment, the connecting portion, that is, the contact portion of the adjacent protection block 13 is made of a cushion material such as a water-permeable mat or rubber packing so that the protection block 13 is not damaged. 17
Is sandwiched, and the gap formed between the connection portions is filled with sand as a filling material 18 to prevent waste 31 from entering below the protection block 13 through the connection portion. .

According to the protection structure 10 of this embodiment having the above-described configuration, the protection block 13 laid vertically and horizontally by the laying operation is not damaged by the overload by the heavy equipment, the waste 31, and the like. Because of its strength, after the completion of the laying work, a dump, a bulldozer or other heavy equipment can be run to immediately dump and reclaim the waste 31, and the waste 31 can be protected by the laid protection block. Since the sheet 13 does not penetrate, it is possible to easily prevent the water impermeable sheet 11 from being damaged.

Further, the protection structure 1 for the water-impervious sheet of the present invention
According to No. 0, the planar shape of the protection block 13 is not limited to the square shape as described above, but may be a rectangular shape or a shape as shown in FIG. Although various shapes such as a triangular shape can be used, as shown in FIGS. 4B and 4C, a shape having an uneven surface around the surface is adopted, and the convex surface is changed to a concave surface. The adjacent protection blocks 13 are fitted together.
When connecting a large number of protective blocks 13 vertically and horizontally while connecting them, the connecting and arranging work can be easily performed by using such a convex surface or a concave surface as a guide, and the installed protective blocks 13 can be easily connected. Can be easily prevented from shifting due to running of heavy equipment.

Further, according to the water-impervious sheet protection structure 10 of the present invention, as shown in FIG. 5, the protection block 13 is provided with an upper surface notch 19 at the peripheral edge of the upper surface, and the protection block 13 is connected vertically and horizontally. It is also possible to fill a gap filling material 18 such as sand into the upper surface concave groove 21 formed by the upper surface notch 19 of the pair of adjacent protection blocks 13 when arranged.

That is, as shown in FIGS. 6A and 6B, the filling material 18 is filled with sand in the concave groove 21 (see FIG. 6A). ,
Alternatively, sand is filled together with non-woven fabric, synthetic resin, rubber, iron plate, sponge, permeable mat, etc. ((b)
Reference), but provided at the connection portion, but by being provided in such a form as to fill the concave groove 21,
The filling material 21 is installed in a stable state.

FIG. 7 shows a water-blocking sheet protection structure 22 according to a second embodiment of the present invention, and a protection block 23 constituting the protection structure 22 of the second embodiment.
As shown in FIGS. 8A and 8B, is a planar square member made of precast concrete having substantially the same strength as the protection block 13 according to the first embodiment, and has two members in the thickness direction. By dividing into layers and translating the upper layer portion 24 diagonally with respect to the lower layer portion 25,
A pair of first side portions 26 from which the lower layer portion 25 projects laterally
And a pair of second side portions 27 in which the upper layer portion 24 protrudes laterally, which is located at a diagonal portion thereof.

Then, as shown in FIG.
After laying a protective mat 12 made of, for example, a nonwoven fabric on the upper surface of the
Is used as a supporting surface, and the lower surface of the second side portion 27 is superposed on the supporting surface of the first side portion 26 as a supported surface. The protection structure 22 is formed by going, but if the protection block 23 having the above-described shape is used, the supported surface of the second side portion 27 is placed on the support surface of the first side portion 26. It is possible to easily perform the connecting and laying work of the protection block 23 in the vertical and horizontal directions while performing the positioning.

According to the protection structure 22 for the water-blocking sheet according to the second embodiment, the surface of the protection block 23 on the first side 26 and the surface of the second side 27 on the side are supported. Is a case where a water-permeable mat is sandwiched and interposed as a cushioning material 17 for preventing breakage, and an adjacent protective block 2 is provided.
3 is filled with sand as a filling material 18 in the gap between the connection portions 3.

The bottom surface of the protection block 23 is provided with an arc-shaped bottom groove 28 in one row vertically and horizontally, and a bottom notch 29 at the peripheral edge. When a large number of protection blocks 23 are vertically and horizontally connected. In addition, these are communicated with each other to form a drain passage 32 between the water-blocking sheet 11 and the protection block 23.

The protection structure 22 of the second embodiment
Also, since the protection block 23 laid vertically and horizontally by the laying work has a strength not to be damaged by the overload by the heavy equipment and the waste 31, etc., after the laying work is completed, the dump, the bulldozer or other heavy equipment is removed. By running, the waste 31 can be immediately dumped and landfilled, and the waste 31 does not penetrate the laid protection block 23, so that damage to the impermeable sheet 11 can be easily caused. It becomes possible to avoid.

It should be noted that the present invention is not limited to the embodiments of the above embodiments, but can be variously modified and adopted within the scope of the configuration described in each claim. For example, it is not always necessary to provide a concave groove or a notch for forming a drainage channel on the bottom surface of the protection block, and the protection block itself is provided with water permeability so that the protection structure has a drainage function. In addition, it is not always necessary to provide a space between connection portions of adjacent protection blocks.

[0038] Even if the protective block has a groove or a notch on the bottom surface for forming a drainage channel, if a protective block having water permeability is used, the protective structure can be improved. The drainage function can be more easily secured.

Further, the protection block can be easily laid vertically and horizontally on the ground at the bottom of the slope to form a protection structure.

[0040]

As described above in detail, according to the protection structure of the seepage control sheet in the waste disposal site of the present invention,
The protective block is constructed by connecting a number of protective blocks vertically and horizontally on the top surface of the water-impervious sheet that are not damaged by the overload of heavy equipment or waste. By arranging the blocks, they can be installed quickly and easily, and after the work of arranging the protection blocks vertically and horizontally, run dumps and other heavy equipment to immediately dump and reclaim waste. Further, since the waste does not penetrate through the laid protection block, it is possible to easily avoid the breakage of the impermeable sheet.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view illustrating an example of a waste disposal site that employs a protection structure of a seepage control sheet of the present invention.

FIG. 2 is an enlarged view of a portion A in FIG. 1 showing a configuration of a protection structure according to the first embodiment of the present invention.

FIG. 3 is a plan view of FIG. 2 as viewed from above.

FIGS. 4A to 4C are plan views showing other shapes of the protection block and a situation in which the protection block is connected and arranged.

FIG. 5 is a schematic sectional view showing another example of a connection portion between adjacent protection blocks.

6 (a) and 6 (b) are enlarged views of a portion B in FIG. 5 showing a state in which a filling material is filled in a concave groove of a connection portion.

FIG. 7 is an enlarged view of a portion A in FIG. 1 showing a configuration of a protection structure according to a second embodiment of the present invention.

FIG. 8A is a plan view of a protection block constituting a protection structure according to a second embodiment of the present invention, and FIG. 8B is a cross-sectional view taken along the line CC of FIG.

FIG. 9 is an enlarged view of a portion A of FIG. 1 showing a configuration of a conventional protection structure.

[Explanation of symbols]

 10, 22 Protective structure of water-blocking sheet 11 Water-blocking sheet 12 Protective mat 13, 23 Protective block 14, 28 Bottom concave groove 15, 29 Bottom notch 16 Drainage channel 18 Filling material 19 Top notch 20 Bottom ground 21 Upper surface Groove 24 Upper layer part 25 Lower layer part 26 First side part 27 Second side part 30 Waste disposal site 31 Waste

Claims (7)

[Claims] 1. A protection structure for protecting a water-impervious sheet that is installed on the bottom ground of a waste disposal site and that prevents sewage from leaking from the inside of the disposal site to the surrounding ground, A protective structure for a water-impervious sheet in a waste disposal site, wherein a number of protective blocks having strength not to be damaged by an overload due to heavy equipment, waste, and the like are arranged on the upper surface of the sheet in a vertical and horizontal manner. 2. The protection block has a groove or a notch on a bottom surface thereof, which forms a drainage channel between the protection block and the impermeable sheet when the protection block is vertically and horizontally connected and communicates with each other. The protection structure of a seepage control sheet in a waste disposal site according to claim 1, characterized in that: 3. The protection block, which is arranged vertically and horizontally, is provided with a space at a connection portion of an adjacent protection block to prevent waste from entering downward through a gap between the connection portions. Claim 1 or Claim 2
The protection structure of the seepage control sheet in the waste disposal site described in 3. 4. The protection block has an uneven surface around its periphery, and a large number of protection blocks are vertically and horizontally connected while connecting adjacent protection blocks such that the convex surface is fitted to the concave surface. The structure for protecting a water-impervious sheet in a waste disposal site according to any one of claims 1 to 3. 5. The protection block has a planar rectangular shape or a square shape, and is divided into two layers in a thickness direction, and an upper layer portion is moved in a diagonal direction with respect to a lower layer portion so that a lower layer portion is formed. A pair of first side portions projecting sideways, and located at a diagonal portion thereof, has an upper layer portion has a shape including a pair of second side portions projecting sideways, a large number of the protection block The upper surface of the first side portion is used as a supporting surface, and the lower surface of the second side portion is used as a supported surface so as to overlap the supporting surface. The protection structure of a seepage control sheet in a waste disposal site according to any one of claims 1 to 3, wherein the protection sheet is provided. 6. The protection block is provided with a notch in a peripheral portion of an upper surface, and the gap is formed in a notch formed by a notch of a pair of adjacent protection blocks when the protection block is arranged vertically and horizontally. The protection structure of a waterproof sheet in a waste disposal site according to any one of claims 3 to 5, wherein the protection sheet is provided. 7. The structure for protecting a water-blocking sheet in a waste disposal site according to claim 1, wherein the protection block has water permeability.