JP2006068737A - Protective structure of liner sheet for base and slope of landfill facility of waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective structure of a liner sheet for base and slope of a landfill facility. <P>SOLUTION: A protective layer 124 for protecting the liner sheet 122 for the base 110 and slope 120 of the fill-up facility is replaced with protective blocks 140, and a water permeation layer 125 is formed thereon, and damage to the liner sheet 122 is prevented, and ventilation being a phenomenon of discharge of methane gas produced from filtration of leachate and drain or waste, and flow-in of air, becomes smooth. In this protective structure, for the purpose of protection of the liner sheet 122 for the base 110 and slope 120 of landfill facility, filtration, draining and ventilation, a synthetic resin draining layer 123 for civil engineering of the the base 110 and slope 120 is provided on the sheet 122, and the protective layer 124 is further formed on the layer 123. The protective layer 124 is lightweight, and constructed by the assembly of the combined protective blocks 140 formed of waste rubber chips and waste resin chips. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a protective structure for a water shielding sheet on a bottom surface and an inclined surface of a landfill facility for waste, and in particular, the water shielding sheet is protected, and filtration, drainage and ventilation are facilitated to enable an aerobic landfill facility. It relates to the protection structure of the water-impervious sheet on the bottom and inclined surfaces of the waste reclamation facility.

  FIG. 1 is a sectional view showing a waste landfill facility using waste tires to which a conventional technology is applied, and FIG. 2 is a waste used for a waste landfill facility using waste tires to which a conventional technology is applied. 3 is a perspective view showing a tire, FIG. 3 is a perspective view showing a connecting structure of waste tires used in a landfill facility for waste using waste tires to which the conventional technology is applied, and FIG. 4 is a diagram showing the conventional technology applied. It is a front view showing the protective layer which comprises the landfill facility of the waste using a waste tire, and background art is demonstrated with reference to FIGS. 1-4.

  In general, a waste landfill facility is a facility for landfilling wastes between depressions or mountains. The leachate generated inside the waste itself and the contaminated leachate generated by the rainwater being absorbed into the waste when it rains contaminate the groundwater and the earth.

  Therefore, in order to prevent such environmental pollution, after forming a water-impervious layer with clay and laying a water-impervious sheet on the bottom and inclined surfaces that form a general waste landfill facility, After forming the drainage layer, fill the waste and cover the top.

  However, due to the weight of the above-mentioned waste, after about 5 years, the settlement phenomenon of about 30% of the height of the waste occurs. As a result, the water-impervious sheet on the inclined surface and the water-impervious sheet on the bottom inclined downward toward the center are torn by the pulling force, so that the contaminated leachate is absorbed by the groundwater and the earth and becomes the main cause of environmental pollution. ing.

  Furthermore, since the inclined surface has poor air permeability, the inflow of air is blocked. For this reason, the landfill facility is anaerobic, and the decomposition of the waste becomes impossible, and the stabilization of the waste landfill facility cannot be realized.

In addition, since it is not easy to discharge methane gas generated from the inside of the landfill facility through the inclined surface, when an explosion occurs due to the volume expansion inside the landfill facility, an unequal settlement phenomenon occurs, and the water shielding sheet Is damaged.
At present, in order to solve such problems, the protection structure of the water-impervious sheet on the bottom surface and the inclined surface of the waste landfill facility using the waste tire attracts attention, but still has many problems.

Hereinafter, the protection structure of the water-impervious sheet on the bottom surface and the inclined surface of the waste landfill facility using the waste tire will be described.
The bottom surface 10 and the inclined surface 20 constituting the landfill facility are for civil engineering to form a clay layer 21 for water shielding and then lay a water shielding sheet 22 on the water shielding sheet 22 to drain leachate. The synthetic resin drainage layer 23 is formed, and only the sand layer is formed on the clay layer 21.

  Further, the water shielding sheet 22 is prevented from being torn by the sinking of the waste, and the protective layer 24 filled with sand 43 for drainage, filtration and ventilation is provided on the drainage layer 23 or the sand layer of the synthetic resin for civil engineering. To form. Next, the construction process of the protective layer 24 will be described.

  The waste tires 40 having a plurality of through holes 42 formed in the ground contact surface 41 are arranged so as to contact each other, and the ropes 50 are passed through the through holes 42 to bind the plurality of waste tires 40 together. Furthermore, sand 43 is filled between the inside of each waste tire 40 and between each waste tire 40 so as to function as filtration, drainage and ventilation.

  The protective layer 24 has a plurality of through-holes 42 formed in the ground contact surface 41 of each waste tire 40 and sand 43 filled in and between each waste tire 40 functions as filtration and drainage. Is filtered and discharged to the outside.

Furthermore, since the gas is discharged to the outside through the protective layer 24 applied to the inclined surface 20 and the air flows in from the outside, the inside of the waste landfill facility is made to be aerobic, and the microorganisms It aims to stabilize waste landfill facilities through waste decomposition activities.
However, the protection structure for the water-impervious sheet on the bottom surface and the inclined surface of the waste landfill facility to which such conventional technology is applied has the following problems.

In order to protect the impervious sheet 22 on the inclined surface 20, waste tires 40 filled with sand 43 are arranged on the impervious sheet 22, but because of its high weight, it is discarded outside the landfill facility during construction. Often, the rake 45 that supports the tire 40 through the rope is pulled out or the rope 50 is cut.
Further, when the waste 60 is filled on the waste tire 40, a larger load acts on the center of gravity, so that the pile 45 is pulled out or the rope 50 is cut as described above. In many cases, the water-impervious sheet 22 sinks and the water-impervious sheet 22 is torn.

The bottom surface 10 is formed so as to be inclined downward toward the center, and the weight of the waste 60 is added from the top, and the water shielding sheet 22 is often damaged.
Further, in the case of the sand 43 filled in the waste tire 40 constituting the protective layer 24, the permeability coefficient is low, so that the leachate is not easily drained, and it is difficult to discharge methane gas generated from the waste. There is a problem in that an explosion phenomenon due to volume expansion occurs, and a phenomenon of uneven settlement is induced to damage the water shielding sheet 22 of the inclined surface 20.

  Further, in the case of the waste tire 40, since the sand 43 having a low water permeability coefficient is blocked in the through hole 42, the waste tire 40 is filled with the sand 43, and the inflow of air becomes impossible and the aerobic landfill is made. The facility becomes impossible.

  In the present invention, in order to solve the above-mentioned problems, the water shielding sheet is permanently protected by improving the structure for forming a protective layer that is normally applied, and smooth drainage and filtration are possible. It becomes. Thereby, since the unequal subsidence phenomenon by the exhaust of the methane gas generated from waste is prevented, the water shielding sheet is protected. The main object of the present invention is to facilitate the inflow of air, enable the facility to be filled with aerobic waste, and protect the environment.

  In the present invention, the protective layer for protecting the water-impervious sheet on the bottom surface and the inclined surface of the waste landfill facility is constituted by a protective block, and the water-permeable layer is formed on the upper part thereof, so that the water-impermeable sheet is prevented from being damaged. Filtering and draining leachate, and easy discharge of methane gas generated from waste. Therefore, the unequal settlement of waste is prevented, the inflow of air becomes smooth, and the area of the aerobic structure is expanded. As a result, the environment for decomposing waste can be improved and the landfill can be stabilized at an early stage, so that the quality of leachate can be improved and resources can be reused.

Hereinafter, preferred embodiments and operations of the present invention for achieving the above object will be described with reference to the drawings.
FIG. 5 is a sectional view showing a waste landfill facility to which the technology of the present invention is applied. 6 (a), 6 (b), and 6 (c) are perspective views showing protection blocks of various shapes constituting a protection layer of a waste landfill facility to which the technology of the present invention is applied. 7 is a plan view of FIG. 6B viewed from the A direction, and FIG. 8 is a side view of FIG. 6B viewed from the B direction. FIG. 9 is a perspective view showing an embodiment of the protection block shown as FIG. 6B, and FIG. 10 is a perspective view showing an embodiment of the protection block shown as FIG.

  The protection structure of the water impervious sheet on the bottom surface and the inclined surface of the waste landfill facility to which the technology of the present invention is applied is generally formed after the clay layer 121 is formed on the bottom surface 110 and the inclined surface 120 for water impediment. A water-impervious sheet 122 is laid, and a drainage layer 123 of a synthetic resin for civil engineering (synthetic resin nonwoven fabric) is formed on the water-impervious sheet 122 for drainage of leachate. This prevents the waterproof sheet 122 on the civil engineering synthetic resin drainage layer 123 from being torn, drains and filters, discharges methane gas generated from the inside of waste, and inflow of air, that is, ventilation. For this purpose, a protective layer 124 is provided.

  In the present invention, since the protective layer 124 located above the water-impervious sheet 122 of the waste landfill facility is improved, the leachate can be filtered, drained, methane gas discharged, and air can flow smoothly. This prevents damage to the water-impervious sheet 122 due to the unequal subsidence phenomenon of the waste, enables aerobic or semi-aerobic of the waste landfill facility, enables early stabilization, and allows the water-impervious sheet 122 to be stabilized. It is characterized by preventing damage.

  In the present invention, the bottom rubber 110 and the inclined surface 120 are formed by mixing a waste rubber chip or a waste resin chip that is lightweight and capable of aerobic or semi-aerobic with an adhesive, and is formed by a method such as vulcanization molding. After the protective block 140 is combined, the protective layer 124 is formed by binding with the rope 150, and a material having high water permeability such as sand mixed with gravel for filtering leachate on the protective layer 124. More configured water-permeable layers 125 are formed.

  The protection block 140 is formed in a puzzle manner so that the protection blocks 140 are combined. The protection block 140 is composed of waste rubber chips or waste resin chips, and allows drainage or ventilation through the space between the chips. A body 141 configured to be tempered or semi-aerobic, and a plurality of through holes 145 for drainage and ventilation are formed in the body 141, and a plurality of holes for drainage and ventilation are formed on one side. The ventilation groove 142 is formed, and the connection hole 143 and the connection groove 144 are formed so as to bind the protection blocks 140 with the rope 150.

  As an example of the protection block 140, when the shape is a cross as shown in FIG. 6B, a plurality of through holes 145 are formed through the front surface and the rear surface, and the upper end, the lower end, and the upper and lower portions 146, 147 are formed. Since the connecting holes 143 are drilled on both side surfaces and the connecting grooves 144 are formed perpendicularly to the left and right ends 148, 149, the ropes 150 can be easily bundled after being combined.

  The protection block 140 is not limited to the cross shape described above, and any shape can be used as long as the puzzles can be combined. The connection hole 143 and the connection groove 144 are formed so that the rope 150 can be bound. If so, there is no problem.

Hereinafter, the cross-shaped protection block 140 according to the present invention will be described as an example.
In order to configure the protective layer 124 with the plurality of protective blocks 140 as described above, first, the connecting grooves 144 are aligned with each other so that the left and right ends 148 and 149 of the protective block 140 are in contact with each other. Thus, a vertical hole is formed. In addition, the upper portion 146 or the lower portion 147 of the protection block 140 flows in through the recessed grooves 155 formed at the top and bottom.

Therefore, the connecting holes 143 formed at the upper and lower ends of the protective block 140 are connected to the connecting grooves 144 that coincide with each other, and in the case of the through holes 145 formed in the front-rear direction, the water permeable layers 115 and 125 of the bottom surface 110 and the inclined surface 120. Communicated with.
In this way, the ropes 150 are vertically passed through the connecting grooves 144 coincident with the connecting holes 143 formed at the upper and lower ends for bundling the combined protective blocks 140, and the right and left connecting holes coincide with each other. The rope 150 is passed horizontally through 143 and bound together.

Further, the plurality of protection blocks 140 bound together are supported by a rope 150 and a support such as a pile 158 provided outside the waste landfill facility.
Thus, the permeable layer 125 formed of sand and gravel was formed on the upper surface of the protective layer 124 constructed on the bottom surface 110 and the inclined surface 120 of the waste landfill facility, and the leachate was filtered and drained. Thereafter, the water is drained through the through hole 145 of the protection block 140 and the body 141 composed of waste rubber chips and waste resin chips. The reason for forming the water permeable layer 125 is to prevent the waste 160 from blocking the through-hole 145 of the protection block 140 constructed by the bottom surface 110 and the inclined surface 120 and to filter leachate.

  By mixing gravel as described above, the water permeability of sand is improved and the inside of the protective block 140 is not forcedly filled with sand and gravel, so that the weight of the protective layer 124 can be reduced and drainage is also prevented. Ventilation can also be made smooth.

  Since the protective layer 124 is formed of a lightweight waste rubber chip or waste resin chip, it is possible to prevent a phenomenon that the water shielding sheet 122 is damaged due to settlement. Since a space is naturally formed between the waste rubber chip or the waste resin chip, drainage and ventilation of the leachate are smoothed, and the quality of the leachate can be improved. This facilitates the discharge of methane gas generated from waste, prevents the unequal settlement of waste, and facilitates the supply of air, thus promoting the decomposition process of microbial waste and disposing of it. The aerobic or semi-aerobic property of the landfill is quickly realized.

  Furthermore, by recycling waste rubber chips or waste resin chips that are difficult to dispose as protective blocks 140 for stabilizing the landfill site of waste, the effect of reusing resources is great. Since the waste rubber chip or the waste resin chip is a material supplied free of charge, the construction budget of the waste landfill can be reduced.

FIG. 1 is a cross-sectional view showing a waste landfill facility using waste tires to which a conventional technique is applied. FIG. 2 is a perspective view showing a waste tire used in a waste landfill facility using a waste tire to which a conventional technique is applied. FIG. 3 is a perspective view showing a connection structure of waste tires used in a waste landfill facility using waste tires to which a conventional technique is applied. FIG. 4 is a front view showing a protective layer constituting a waste landfill facility using waste tires to which a conventional technique is applied. FIG. 5 is a sectional view showing a waste landfill facility to which the technology of the present invention is applied. 6 (a), (b), and (c) are perspective views showing protection blocks of various shapes constituting a protection layer of a waste landfill facility to which the technology of the present invention is applied. FIG. 7 is a plan view of FIG. 6B viewed from the A direction. FIG. 8 is a side view of FIG. 6B viewed from the B direction. FIG. 9 is a perspective view showing an embodiment of the protection block shown as FIG. FIG. 10 is a perspective view showing an embodiment of the protection block shown as FIG.

Explanation of symbols

120: Inclined surface 121: Clay layer 122: Water shielding sheet 124: Protective layer 140: Protective block

Claims (4)

A clay layer 121 formed for water shielding on the bottom surface 110 and the inclined surface 120 constituting the waste landfill facility;
A water shielding sheet 122 formed on the clay layer 121 for water shielding;
A drainage layer 123 of a synthetic resin for civil engineering to be formed on the water shielding sheet 122 for drainage;
Water shielding on the bottom and inclined surfaces of waste landfill facilities comprising a protective layer 124 formed for protection and filtration, drainage and ventilation of the water shielding sheet 122 on the synthetic resin drainage layer 123 for civil engineering A protective structure for the seat,
The protective layer 124 includes a body 141 formed of waste rubber chips and waste resin chips so as to allow drainage and ventilation of leachate and having a space between the chips. The protection block 140 is formed to be combined in a puzzle manner. A structure for protecting a water shielding sheet on a bottom surface and an inclined surface of a landfill facility for waste, which is characterized by comprising an assembly of the above. 2. The water shielding sheet for bottom and inclined surfaces of a waste reclamation facility according to claim 1, wherein the body 141 of the protection block 140 is formed with a plurality of through holes 145 for draining and ventilating leachate. Protection structure. 2. The waste according to claim 1, wherein the body 141 of the protection block 140 includes a connection hole 143 and a connection groove 144 formed to allow the rope 150 to pass therethrough for bundling with the adjacent protection block 140. Protective structure for water-impervious sheet on bottom and inclined surface of landfill facilities. The bottom surface and the inclined surface of the waste reclamation facility according to claim 1, wherein a plurality of ventilation grooves (142) are formed on one side surface of the body (141) of the protection block (140) for draining and aeration of leachate. Protective structure for water shielding sheet.

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