JP2010240501A - Cover structure for buried waste in final waste-disposal site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a reclaimed site easy to use as the ground to prompt early and effective utilization of the same, and to reduce the cost of treating leachate, by clearly defining the area of the responsibility in the management and the treatment of upper water and lower water by shielding the upper water such as rain water falling on the reclaimed waste disposal site and water used upon utilizing the buried waste therein as the ground, from leachate (lower water) coming out of the buried waste therein. <P>SOLUTION: Asphalt paving 3 is laid over buried waste 1, an impervious sheet 5 coated with a pair of protective mats 4 covering the upper and the lower faces thereof is laid over the paving 3, a plurality of perforated water-collection pipes 6 for collecting leachate are disposed over the upper protected mat 4a at a prescribed distance apart from each other, a layer of earth-covering sand is overlaid to cover the plurality of water collection pipes 6, and a layer of bank suitable for individual objectives of utilizing the reclaimed site are laid over the layer 7 of earth-covering sand to construct a banking layer 8, in order to construct a cover structure 2. A gutter is disposed in the vicinity of roughly whole circumference of the cover structure 2 to allow water flowing on the surface of the cover structure 2 to flow thereinto, and a plurality of water-collection boxes are disposed in the vicinity of the gutter to allow water coming out of the gutter and the water-collection pipes 6 buried in the cover structure 2 to flow thereinto, which water is discharged from the water collection boxes outside. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a structure for covering landfill waste at a final disposal site.

  Conventionally, waste to be disposed of as unnecessary is general waste discharged with daily life and industrial waste generated with business activities. General waste refers to waste other than industrial waste. Depending on the type of such waste, safe ones are either landfilled or sent to an incineration site for incineration. However, if the organic waste is landfilled as it is at the time of disposal of the waste, it is easily decomposed to generate gas and a bad odor is generated. In addition, the waste contains heavy metals such as mercury and cadmium, and dioxins are eluted.

  Therefore, “In a waste landfill treatment plant, an air supply pipe having a vent hole disposed in the lowermost layer is installed, and the air supply pipe is covered with a breathable water-impervious sheet, and an appropriate amount of the air-impermeable sheet is coated on the water-impermeable sheet. A waste layer is formed by waste, and an uppermost layer formed by appropriately embedding on the waste layer coated with a degassed water shielding sheet is formed, and air is supplied to the lowermost layer portion through the air supply pipe. A waste disposal method of “supply” is proposed (refer to Japanese Patent Laid-Open No. 5-123659). According to the waste disposal method, “It is possible to completely prevent rainwater from entering the waste layer, thereby preventing the dissolution of harmful components in the waste, and the retention of moisture in the waste. Since the anaerobic decomposition is suppressed and the generation of gas is prevented, the aerobic decomposition of the organic matter in the waste is promoted and the gas and water vapor generated from the waste can be released at an early stage. It is possible to stabilize the ground of the waste disposal site early, and to realize the early use of the ruins.

  On the other hand, in the method of infiltrating rainwater into waste, for example, infiltration that adjusts the permeated rainwater to be uniform between the final covering soil covering the upper side of the waste and the infiltration adjusting embankment provided on the covering soil. A method for adjusting osmotic rainwater in a waste treatment plant (see Japanese Patent Application Laid-Open No. 2002-113437) in which an adjustment sheet is interposed, a coarse soil layer formed with a gradient on a waste layer, and the coarse particle A breathable waterproof sheet laid on the soil layer and provided with a water-permeable portion formed by a plurality of scattered small holes, and a fine soil layer formed on the breathable waterproof sheet The soil covering structure in the waste final disposal site (see Japanese Patent Application Laid-Open No. 2006-2117) and the like are presented.

JP-A-5-123659 JP 2002-113437 A JP 2006-21117 A JP 2009-54303 A

  However, when organic waste is contained in the waste to be disposed of, the organic waste is extremely small in density and bulky. Therefore, when adopting a waste disposal method such as covering the waste layer with a degassing impermeable sheet, “in order to completely prevent rainwater from entering the waste layer, Prevents leaching of harmful components and makes it difficult for moisture to stay in the waste, so that anaerobic decomposition can be suppressed, thereby preventing gas generation and further promoting aerobic decomposition of organic matter in the waste. Even if we can claim that gas and water vapor generated from waste can be released at an early stage, it is impossible to stabilize the ground at the waste disposal site. I don't think. In addition, as a disposal method for preventing generation of gas from waste, there is a disposal method by solidifying the waste. However, even if the waste is kneaded with cement and put in a mold and solidified, if the waste contains organic waste, the portion is brittle and the strength of the solidified product cannot be increased. There is.

  Accordingly, the present applicant has previously disclosed various inorganic materials as JP 2009-54303 (a large number of unit solidified material forming disposal methods and a large number of unit solidified material forming disposal structures by separating and integrating inorganic waste at the final disposal site). When the waste is kneaded with cement, or when the amount of water contained in the inorganic waste does not reach the required amount, further water is added and kneaded, and the kneaded product is compressed and solidified. The unit solidified products are placed and arranged in the horizontal direction one after the other, and are placed in the vertical direction one after the other and stacked, and a number of unit solidified products are joined together so that the entire inorganic waste landfilled in the final disposal site is solidified as cement. A number of unit solidified molding disposal methods and a number of unit solidified molding disposal structures in the final disposal site formed by integration by disposal were presented.

  According to the disposal method and the structure, “It is difficult to dissolve various contained substances, especially harmful substances, in the water retained in the disposal site, and the water quality of the retained water always satisfies the release standard after water treatment. Processing costs can be greatly reduced, and the amount of carbon dioxide released into the atmosphere can be greatly reduced, resulting in a significant reduction in gas generation and odors at the disposal site, thus increasing safety and reliability against pollution in the surrounding environment. And since the structure becomes solid during the disposal, it is possible to freely run the transport vehicle, heavy equipment, etc. on the disposal structure, and the waste can be disposed of quickly. Since the type of inorganic waste and the disposal position of the waste can be determined with high accuracy, the management of the inorganic waste can be ensured, and the support capacity of the disposal structure stabilizes early after the end of the disposal. Manage quickly Therefore, the site of the disposal site will be stabilized at an early stage, and it will become easier to effectively use the site in a wide range of forests, parks, residential areas, factory sites, playgrounds, etc., and waste can be recycled as ground. ” Insisted.

  However, when landfill waste from the final disposal site is recycled as ground, rainwater that falls on the site, upper water such as water used in parks installed on the site waste, and landfill disposal of the disposal site The relationship with the leachate from the stored water becomes a problem. If the upper water reaches the landfill waste, when an abnormality appears in the amount of leachate or the water quality test results, it may not be possible to clarify the responsibility of management pursuing the cause. . Therefore, even if the final disposal site is stabilized at an early stage, it is difficult to use landfill waste as the ground as it is, and early effective use cannot be promoted.

  The present invention has been made paying attention to such conventional problems, such as rain water falling on the site of the final disposal site and upper water such as water used when using the landfill waste of the site as ground. The site is used as the ground by blocking the relationship with leachate (lower water) from the landfill waste at the disposal site and clarifying the responsibility for the management and treatment of the upper and lower water for the landfill waste An object of the present invention is to provide a landfill waste covering structure for a final disposal site that facilitates early effective use and can reduce leachate water treatment costs.

  In order to achieve the above object, the landfill waste covering structure of the final disposal site according to the present invention is a mixture of various inorganic wastes with cement, or the required amount of water contained in such inorganic wastes. If not reached, knead by further adding water, compress the kneaded product, solidify and form unit solidified products sequentially placed in the horizontal direction and arranged, stacked in the vertical direction sequentially, stacked, Adjacent ones of unit solidified materials are joined together to form a structure that covers the landfill waste of the final disposal site formed by integrating the entire inorganic waste landfilled in the final disposal site by cement solidification disposal.

  Then, the covering structure is subjected to asphalt pavement on the landfill waste, a water shielding sheet covering the top and bottom with a protective mat is laid on the asphalt pavement, and a porous permeated water collection is provided on the upper protective mat. The water pipes are arranged at predetermined intervals, and the sand for covering soil that covers each water collecting pipe is applied in layers, and the embankment according to the purpose of use is applied in layers on the sand-covering sand layer to form a bank layer. It consists of.

  In addition, a side groove into which water flowing on the ground surface of the structure flows is arranged near the entire periphery of the landfill waste covering structure, and further, water flows from the side groove and the water collecting pipe embedded in the structure near the side groove. It is preferable to install a catchment basin and discharge water from the catchment basin.

  The landfill waste covering structure of the final disposal site according to the present invention can strengthen the foundation of the covering structure by applying asphalt pavement on the landfill waste. Moreover, according to the asphalt pavement, the upper surface of the foundation can be easily formed smoothly, and a protective mat, a water shielding sheet and the like laid thereon can be favorably supported. In addition, even if the water shielding sheet is damaged, the water shielding effect can be increased so that the water from above is blocked by asphalt pavement so as not to reach the landfill waste.

  Then, a water-impervious sheet covering the asphalt pavement with a protective mat is laid on the asphalt pavement, and perforated permeate water collecting pipes are arranged on the upper protective mat at predetermined intervals, and each of the water collecting pipes. By applying layered sand to cover the soil and layering the layered sand according to the purpose of use to form a bank layer, the rainwater and landfill waste from the final disposal site are grounded. Covering soil that allows water to pass through under the embankment layer even if the water used when using it as an upper water, such as water used in a park constructed on it, penetrates into the embankment layer and moves downward Since there is a sand layer, the embankment layer can be drained well.

  In addition, the permeated water collecting pipes with holes are arranged on the upper protection mat at predetermined intervals, and these water collecting pipes are embedded in the sand-covering sand layer so that they penetrate into the sand-covering sand layer. The incoming upper water can be smoothly collected and guided by each collecting pipe and discharged to the outside. The sand cover sand layer functions as a protective material that absorbs and protects each water collecting pipe, a protective mat laid on the lower side, a water shielding sheet, and the like. Naturally, each protective mat is also a protective material that absorbs and protects the impact on the water shielding sheet.

  When the landfill waste at the site of the final disposal site is covered with such a structure, the rainwater that falls on the site of the final disposal site, the upper water such as water used when using the site as the ground, and the landfill waste at the site of the final disposal site The relationship with the leachate (lower water) coming out of the water can be cut off. Therefore, it is possible to clarify the scope of responsibility for the management and treatment of upper and lower water for landfill waste, to make it easier to use the site as the ground, and to promote early effective use. Moreover, leachate water treatment costs can be reduced.

  In addition, a side ditch into which water flowing on the ground surface of the structure flows is installed near the entire circumference of the landfill waste covering structure, and further, a water flow from the water collecting pipe embedded in the side ditch and the structure is provided near the side groove. By installing a water tank and discharging the water from the water collecting tank, the upper water is cut off from the lower water, which is the leachate of landfill waste, and can be managed and treated well.

The best mode for carrying out the present invention will be described below with reference to FIGS.
FIG. 1 is a longitudinal sectional view showing a main part of a landfill waste covering structure of a final disposal site to which the present invention is applied. FIG. 2 is a plan view of the landfill waste covering structure of the final disposal site. This landfill waste 1 is the waste landfilled at the final disposal site. When landfilling, for example, various inorganic wastes are mixed with cement, or the amount of water contained in these inorganic wastes is reduced to the required amount. If not, knead by adding water, compress the kneaded product, solidify and form unit solidified products in the horizontal direction and place them one after the other, or install them in the vertical direction one after the other. Adjacent ones of the unit solidified materials are combined and buried in the final disposal site, and the entire inorganic waste landfilled in the final disposal site is formed by integration by cement solidification disposal.

  Then, a covering structure 2 is provided on the landfill waste 1. At that time, the asphalt pavement 3 is first formed on the landfill waste 1 in the form of a horizontal layer having a thickness of, for example, 3 cm. Then, the foundation of the covering structure 2 can be strengthened. Moreover, according to the asphalt pavement 3, the upper surface of the foundation can be easily formed smoothly, and the protective mats 4 (4a, 4b), the water shielding sheet 5 and the like laid thereon can be favorably supported. In addition, even if the water-impervious sheet 5 is damaged, the asphalt pavement 3 can block water from above so that it does not reach landfill waste. Therefore, the water shielding effect is increased by the asphalt pavement 3.

  Next, a water shielding sheet 5 is laid on the asphalt pavement 3 so as to cover the upper and lower sides with the protective mat 4. This water-impervious sheet 5 is a sheet that blocks the penetration of water downward, and both protective mats 4 are sheets that absorb and protect the impact on the water-impervious sheet 5 and set them together. Are commercially available.

  Next, the permeated water collecting pipes 6 are arranged at predetermined intervals, for example, every 10 m, in direct contact with the upper protective mat 4a, and the covering soil for covering the water collecting pipes 6 is layered. Apply. At that time, the thickness of the soil covering sand layer 7 is set to 30 cm, for example. Next, the embankment according to the purpose of use is layered on the sand covering sand layer 7. At that time, as the embankment according to the purpose of use, for example, when using the former site as a park or forest, mountain soil including humus, when using it as a field, black soil, when using it as a factory or playground, sand etc. Is used. Then, the thickness of the embankment layer 8 is set to 50 cm, for example, but the central portion thereof is slightly increased, and the slope that increases in the direction indicated by the dotted arrows 9 is given to the ground surface. Flow in the directions indicated by arrows 10 respectively. It should be noted that the thicknesses of the soil covering sand layer 7 and the embankment layer 8 can be appropriately selected according to the purpose of use.

  After forming the main part of the covering structure 2 in this way, the structure 2 so that water flowing on the ground surface of the structure 2 flows into the U-shaped side grooves 11 as shown in FIG. For example, it is arranged in a rectangular shape on almost the entire periphery. Further, two water collecting basins 12 shown in FIG. 4 are installed at both ends of a rectangular diagonal line corresponding to the intersection of the side grooves 11 extending in the perpendicular direction, and each side groove 11 and each seepage water collecting pipe are provided there. As shown by the thin line arrows 13 from 6, water flows in each. Then, the covering structure 2 that covers the landfill waste 1 at the final disposal site is completed. In addition, 21 is a gas vent pipe supported by protective concrete, which is installed in the asphalt pavement penetration part, and is released in the atmosphere to the atmosphere. To do.

  After providing such a covering structure 2 on the landfill waste 1, when using the landfill waste 1 as the ground and constructing and using a park or the like on it, rain water (snowfall etc.) falls on it. Even if upper water such as water used in a park or the like penetrates into the embankment layer 8 and moves downward, there is a sand-carrying sand layer 7 under the embankment layer 8 that allows easy passage of water. 8 can be well drained.

  Moreover, since the perforated water collecting pipes 6 are directly arranged on the upper protective mat 4a at predetermined intervals, and these water collecting pipes 6 are embedded in the covering soil sand layer 7, the covering soil sand layer. The upper water that has permeated into the water 7 can be smoothly collected and guided by the water collecting pipes 6. The soil covering sand layer 7 functions as a protective material that absorbs and protects each water collecting pipe 6, the protection mat 4 laid on the lower side, the water shielding sheet 5 and the like. Naturally, each of the protective mats 4 is also a protective material that absorbs and protects the impact on the water shielding sheet 5.

  In this way, when upper water such as rain water or used water flows from the gutters 11 and the water collecting pipes 6 to the respective water collecting basins 13 and is collected, the water is further discharged through the vertical side walls 14 and the like of the final disposal site. After that, it can be discharged into a U-shaped side groove 17 installed on the external ground surface 16. In addition, protective sheets 18 (18a, 18b) and water-impervious sheets 19 (19a, 19b) are alternately and alternately disposed on the inner side of the side wall 14, and further, a spray urethane layer 20 is disposed on the inner side of the water-impervious sheet 18b. Is provided. Then, the relationship between the upper water and the permeated water (lower water) from the landfill waste at the final disposal site can be well blocked. Therefore, the responsibility range of the upper and lower water for the landfill waste 1 can be clarified, the landfill waste 1 at the final disposal site can be easily used as the ground, and early effective use can be promoted. Moreover, leachate water treatment costs can be reduced.

It is a longitudinal cross-sectional view which shows the principal part of the landfill waste covering structure of the final disposal site to which this invention is applied. It is a top view of the landfill waste covering structure of the final disposal site. It is a longitudinal cross-sectional view of a part periphery vicinity cut | disconnected perpendicularly to the side ditch and the water collection pipe | tube of the same final disposal site. It is a longitudinal cross-sectional view of a part periphery part cut | disconnected in the parallel direction with the side ditch and the water collection pipe | tube of the same final disposal site.

  DESCRIPTION OF SYMBOLS 1 ... Landfill waste 2 ... Covering structure 3 ... Asphalt pavement 4, 18 ... Protective sheet 5, 19 ... Water shielding sheet 6 ... Permeated water collecting pipe 7 ... Sand cover layer 8 ... Filling layer 11, 17 ... Ditch 12 ... Collection Minamata 15 ... Water discharge pipe 16 ... External ground surface 20 ... Urethane spray layer 21 ... Gas vent pipe

JP-A-5-123659 JP 2002-113437 A JP 2006-21117 A Japanese Patent Application No. 2009-54303

Therefore, the present applicant JP Application 2009-54303 is ahead (number of units solidified by inorganic waste separation and integration in the final disposal site molding disposal as well as a number of unit solidified molded disposal structure), various inorganic When the waste is kneaded with cement, or when the amount of water contained in the inorganic waste does not reach the required amount, further water is added and kneaded, and the kneaded product is compressed and solidified. The unit solidified products are placed and arranged in the horizontal direction one after the other , and the vertical unit is placed and stacked one after the other . Many unit solidified products are adjacent to each other . objects to be bound together by binding action during cementation, many units solidified molding processing the entire inorganic waste in the final disposal site formed by integrally by cementation disposal landfill in final disposal sites Method and presented a number of unit solidified molded disposal structure.

To achieve the above object, the final disposal site of landfill waste covering structure according to the present invention, the inorganic waste cement and kneaded, or the case where the water contained in the inorganic wastes not reach the required amount In addition, water is added and kneaded, the kneaded product is compressed, and solidified unit solidified products are sequentially placed and arranged in the horizontal direction, and then placed and stacked in the vertical direction in succession to form a large number of unit solidified products. Adjacent ones and unit solids installed earlier are united by uniting the unit solids installed later by the cementing action at the time of cement solidification , and the entire inorganic waste landfilled in the final disposal site is cement solidified A structure that covers the landfill waste of the final disposal site formed by the integration by.

Then, the covering structure is subjected to asphalt pavement on the landfill waste, a water shielding sheet covering the top and bottom with a protective mat is laid on the asphalt pavement, and a porous permeated water collection is provided on the upper protective mat. constructed by the water tube is disposed at predetermined intervals, further subjected the to the cover soil sand covering each water collecting pipes layered, the embankment according to the intended use on the soil covering for sand to form a embankment layer subjected layered To do.

Further, the near entire periphery of landfill waste coating structure, disposed water collecting gutters flowing water flowing through the ground surface of the structure, further near the water collecting groove, buried in the water collecting gutter and structures It is preferable to install a water collecting basin into which water flows from the water collecting pipe and discharge the water from the water collecting basin to the outside.
In addition, a vertical side wall is arranged around the landfill site of the inorganic waste at the final disposal site, and a protective sheet and a water shielding sheet are arranged inside the vertical side wall, and further inside the water shielding sheet. A spray urethane layer is preferably provided.

Then, the upper and lower on the asphalt pavement water-barrier sheet laid covering with a protective mat, disposed the upper protective osmosis water collecting water pipe perforated on the mat at predetermined intervals, to cover the respective water collecting pipes By applying sand for covering soil in layers and forming the embankment layer on top of the sand layer for covering soil according to the purpose of use, rainwater falling on the site of the final disposal site and landfill waste from the site are used as the ground Even if the upper water such as water used in the park, such as a park constructed on it, penetrates into the embankment layer and moves downward, it is easy to pass water under the embankment layer. Therefore, it is possible to drain the embankment layer well.

Moreover, with disposing the permeate water water collecting tube perforated at predetermined intervals on the upper protective mat, since the buried each water collecting pipes in the soil covering for sand, it came penetrate into the sand layer for soil covering The upper water can be smoothly collected and guided by each collecting pipe and discharged to the outside. Moreover, the sand cover layer serves as a protective material that absorbs and protects each water collecting pipe, a protective mat laid on the lower side, a shock shielding sheet, and the like. Naturally, each protective mat is also a protective material that absorbs and protects the impact on the water shielding sheet.

Further, in the vicinity of the entire periphery of the landfill waste coating structure, set up a collecting gutter water flowing ground surface of the structure flows further near the water collecting groove, buried in the water collecting gutter and structures collecting By installing a drainage basin into which water flows from the water pipe and discharging the water from the basin, the upper water can be well managed and treated by blocking the lower water, which is the leachate of landfill waste. .
In addition, a vertical side wall is arranged around the landfill site of the inorganic waste at the final disposal site, and a protective sheet and a water shielding sheet are arranged inside the vertical side wall, and further inside the water shielding sheet. By providing a sprayed urethane layer, the upper water and the infiltrated water from the landfill waste at the final disposal site (bottom water) will not enter the side of the inorganic waste landfilled at the final disposal site. ) Can be well cut off.

The best mode for carrying out the present invention will be described below with reference to FIGS.
FIG. 1 is a longitudinal sectional view showing a main part of a landfill waste covering structure of a final disposal site to which the present invention is applied. FIG. 2 is a plan view of the landfill waste covering structure of the final disposal site. This landfill waste 1 is the waste landfilled at the final disposal site. When landfilling, for example, various inorganic wastes are mixed with cement, or the amount of water contained in these inorganic wastes is reduced to the required amount. If not, knead by adding water, compress the kneaded product, solidify and form unit solidified products in the horizontal direction and place them one after the other, or install them in the vertical direction one after the other. The unit solidified product of the adjoining unit, the unit solidified product installed earlier, and the unit solidified product to be installed later are united together by the binding action at the time of cement solidification , and then buried in the final disposal site, the final The whole inorganic waste landfilled at the disposal site is formed by integration by cement solidification disposal.

After forming the main part of the covering structure 2 in this way, the structure of the U-shaped water collecting side grooves 11 as shown in FIG. For example, the body 2 is disposed in a substantially rectangular shape around the entire periphery. Also, two water collecting troughs 12 shown in FIG. 4 are installed at both ends of a rectangular diagonal line corresponding to the intersection of the water collecting side grooves 11 respectively extending in the right-angle direction, and each water collecting side groove 11 and each Water is allowed to flow from the permeate water collecting pipe 6 as indicated by thin line arrows 13. Then, the covering structure 2 that covers the landfill waste 1 at the final disposal site is completed. In addition, 21 is a gas vent pipe supported by protective concrete, which is installed in the asphalt pavement penetration part, and is released in the atmosphere to the atmosphere. To do.

In this way, when upper water such as rain water or used water flows from the water collecting side grooves 11 and the water collecting pipes 6 to the water collecting basins 13 and is collected, the water is further collected around the inorganic waste landfill site of the final disposal site. The water can be discharged into a U-shaped discharge side groove 17 installed on the external ground surface 16 through a water discharge pipe 15 penetrating through the vertical side wall 14 and the like disposed in FIG. In addition, protective sheets 18 (18a, 18b) and water-impervious sheets 19 (19a, 19b) are alternately stacked on the inner side of the vertical side wall 14, and a spray urethane layer is further disposed on the inner side of the water-impervious sheet 18b. 20 is provided. Then, the upper water does not enter from the side, and the relationship between the upper water and the permeated water (lower water) from the landfill waste at the final disposal site can be well blocked. Therefore, the responsibility range of the upper and lower water for the landfill waste 1 can be clarified, the landfill waste 1 at the final disposal site can be easily used as the ground, and early effective use can be promoted. Moreover, leachate water treatment costs can be reduced.

It is a longitudinal cross-sectional view which shows the principal part of the landfill waste covering structure of the final disposal site to which this invention is applied. It is a top view of the landfill waste covering structure of the final disposal site. It is a longitudinal cross-sectional view of a part periphery part cut | disconnected in the perpendicular direction with the water collection side ditch and water collection pipe | tube of the same final disposal site. It is a longitudinal cross-sectional view of a part periphery part cut | disconnected in the parallel direction with the water collection side ditch and the water collection pipe of the same final disposal site.

DESCRIPTION OF SYMBOLS 1 ... Landfill waste 2 ... Covering structure 3 ... Asphalt pavement 4, 18 ... Protective sheet 5, 19 ... Water shielding sheet 6 ... Permeated water collecting pipe 7 ... Sand cover layer 8 ... Filling layer 11 ... Water collecting side groove 12 ... Collection Water tank 14 ... vertical side wall 15 ... water discharge pipe 16 ... external ground surface 17 ... discharge side groove 20 ... sprayed urethane layer 21 ... gas vent pipe

Therefore, the present applicant previously described as Japanese Patent Application No. 2009-54303 (multiple unit solidified molding disposal methods and multiple unit solidified molding disposal structures by separation and integration of inorganic waste at the final disposal site) as inorganic waste. was cement and kneaded, or when said not reach the inorganic waste required amount of water contained in the product is further kneaded by adding water, the unit solid formed by compressing the kneaded product, its Unit solids are placed and arranged sequentially in the horizontal direction, and placed and stacked sequentially in the vertical direction , the unit solids are sequentially solidified and molded, and the unit solids formed by the solidification molding are adjacent to each other, relative units solidified product was installed earlier, be coupled together by coupling action in cement solidification unit solidified product units solids installed after the entire inorganic waste landfill final disposal site by cementation disposal The number of units solidified molding disposal methods as well as a number of unit solidified molded disposal structure in the final disposal site formed by the body of presented.

In order to achieve the above object, the landfill waste covering structure of the final disposal site according to the present invention is a case where inorganic waste is kneaded with cement or water contained in the inorganic waste does not reach the required amount. In addition, water is further added and kneaded, the kneaded product is compressed to form unit solids, the unit solids are sequentially placed and arranged in the horizontal direction, and sequentially placed and stacked in the vertical direction . unit solid successively solidified molded, during cementation of the solidified molded adjacent ones of the plurality of unit solidified product obtained, with respect to the unit solidified product which was installed earlier, the unit solidified product units solids installed after The entire inorganic waste landfilled in the final disposal site is made into a structure that covers the landfill waste in the final disposal site formed by the integration by cement solidification disposal.

In addition, a water collection side ditch into which water flowing on the ground surface of the structure flows is arranged near the entire periphery of the landfill waste covering structure, and further embedded in the water collection side ditch and the structure near the water collection side ditch. established the catchment basins of water flows from the water collecting pipe, its was discharged from the water collection basins of water to the outside, and arranged vertical sidewalls further around the inorganic waste landfill location of the final disposal site, inside the vertical side walls In addition, a protective sheet and a water shielding sheet are disposed in an overlapping manner, and a spray urethane layer is further provided inside the water shielding sheet.

The best mode for carrying out the present invention will be described below with reference to FIGS.
FIG. 1 is a longitudinal sectional view showing a main part of a landfill waste covering structure of a final disposal site to which the present invention is applied. FIG. 2 is a plan view of the landfill waste covering structure of the final disposal site. This landfill waste 1 is the waste landfilled at the final disposal site. When landfilling, for example, various inorganic wastes are mixed with cement, or the amount of water contained in these inorganic wastes is reduced to the required amount. If not, add water and knead, compress the kneaded product to form unit solids, install the unit solids in the horizontal direction and arrange them in sequence, and install them in the vertical direction sequentially. Stacking and solidifying unit solids one after another, and adhering a large number of unit solidified products adjacent to each other, the unit solids installed later to the unit solids installed earlier are unit solids. The entire inorganic waste landfilled in the final disposal site is formed by integration by cement solidification disposal through a process of being united by a binding action during cement solidification and being landfilled in the final disposal site.

Claims (2)

  When various inorganic wastes are kneaded with cement, or when the amount of water contained in these inorganic wastes does not reach the required amount, further water is added and kneaded, and the kneaded product is compressed and solidified. The unitized solids that have been molded are placed and arranged sequentially in the horizontal direction, and are placed and stacked one after another in the vertical direction, and a large number of unitized solids are joined together to bury them in the final disposal site. Is a structure that covers landfill waste at the final disposal site formed by integration by cement solidification disposal, where asphalt pavement is applied to the landfill waste, and the top and bottom of the asphalt pavement are covered with protective mats. A water sheet is laid, and perforated permeated water collecting pipes are arranged at predetermined intervals on the upper protective mat, and the covering sand is applied in layers to cover each collecting pipe. According to the purpose of use Landfill waste covering structure of the final disposal site for soil and forming a embankment layer is subjected to laminar.   Near the entire circumference of the landfill waste covering structure, a side groove into which water flowing on the ground surface of the structure flows is arranged. Further, near the side groove, water flows from the side groove and a water collecting pipe embedded in the structure. 2. A landfill waste covering structure for a final disposal site according to claim 1, wherein a water collecting basin is installed and water is discharged from the water collecting basin to the outside.

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