CN206844170U - Vertical volume expansion structure for refuse landfill - Google Patents

Abstract

The vertical volume expansion structure for refuse landfill that the utility model is related to, including former refuse landfill and former garbage loading embeading thing, also include liner system, new garbage loading embeading thing and newly-increased dam, the newly-increased dam is arranged on the surrounding of former garbage loading embeading thing in former refuse landfill, liner system is integrally coated with the top on newly-increased dam, the medial surface on newly-increased dam, former refuse landfill and former garbage loading embeading thing, and the new garbage loading embeading thing is deposited on the liner system within newly-increased dam inner side；By laying new gasket construction on former refuse landfill junk-heap body, and add geosynthetics in new gasket construction and play reinforced action, prevent new liner system from producing excessive elongation strain, influence heap body stability.It is vertical to improve garbage loading embeading height by way of newly-built waste dam, increase the landfill storage capacity of refuse landfill.

Description

Vertical Expansion Structures for Landfills

technical field

The utility model relates to an expansion structure for a garbage landfill, in particular to a vertical expansion structure for a garbage landfill.

Background technique

With the continuous improvement of living standards and the rapid development of science and technology, the garbage generated in the production and living process continues to increase, which leads to a significant increase in the pressure of various landfills, some landfills are running out of storage capacity, and even some The landfill has reached the designed landfill storage capacity, but new landfills often have many problems such as difficult site selection, large area, high investment, and opposition from the masses, and the remaining storage capacity of old landfills is difficult to meet the waste demand. Landfill storage capacity needs.

In view of this, the main purpose of this utility model is to provide a vertical expansion structure for landfills. Through this technical solution, new garbage dams and liner structures are built in the original landfills, and the existing garbage A reinforced soil layer is laid on the pile body to ensure the stability of the pile body and achieve the purpose of vertically increasing the storage capacity of the landfill.

Contents of the invention

In order to achieve the above purpose, the technical solution of the utility model is realized in the following way: a vertical expansion structure for landfill, including the original landfill and the original landfill, and also includes a liner system, a new Landfills and new dams, the new dams are set around the original landfills on the original landfill site, and the liner system is laid on the top of the new dam, the inner side of the new dam, the original garbage The new landfill is stacked on the liner system inside the new dam and on the old landfill.

As a further technical solution, the liner system from top to bottom is the upper protective layer, the reverse filter layer, the leachate drainage layer, the protective layer on the membrane, the main anti-seepage layer, the auxiliary anti-seepage layer, the secondary anti-seepage layer, the protective layer under the film, the reinforced soil layer, and the lower protective layer.

As a further technical solution, the upper protective layer is medium sand with a thickness not less than 300mm and a permeability coefficient not less than 2.0×10 ^-2 cm/s; the reverse filter layer is a geotechnical filter with a specification not less ^than 200g/m2 ; The leachate drainage layer is a geotechnical composite drainage network with a thickness of not less than 5.0mm; the protective layer on the membrane is a non-woven geotextile with a specification of not less than 600g/m ² ; the main anti-seepage layer can be low Density polyethylene (LLDPE) geomembrane, flexible polypropylene (FPP) geomembrane, polyvinyl chloride (PVC) geomembrane and high-density polyethylene (HDPE) geomembrane; the auxiliary anti-seepage layer has a permeability coefficient not greater than 5.0× 10 ^{- 9} cm/s, ^sodium -based bentonite pad (GCL) with a specification of not less than 4800g/m2; the secondary anti-seepage layer can be low-density polyethylene (LLDPE) geomembrane, flexible polypropylene (FPP) geomembrane and Polyvinyl chloride (PVC) geomembrane and high-density polyethylene (HDPE) geomembrane; the protective layer under the film is a non-woven geotextile with a specification of not less ^than 600g/m2; the reinforced soil layer is a geogrid Or a high-strength geotextile, the lower protective layer is compacted clay with a permeability coefficient not greater than 1.0×10 ^-5 cm/s and a thickness not less than 300mm.

The beneficial effect of adopting the above-mentioned technical scheme is: a vertical expansion structure for landfill, by laying a new liner structure on the waste pile of the original landfill, and adding a geotechnical structure to the new liner structure. The synthetic material acts as reinforcement to prevent excessive tensile strains in the new liner system that could affect the stability of the pile. By building a new garbage dam, the height of the garbage landfill will be increased vertically, and the storage capacity of the garbage landfill will be increased.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a structural schematic diagram of the gasket system in the utility model.

In the figure, 1 original landfill, 2 original landfill, 3 liner system, 4 new landfill, 5 new dam, 6 upper protective layer, 7 reverse filter layer, 8 leachate drainage layer, 9 protective layers on the membrane, 10 main anti-seepage layers, 11 auxiliary anti-seepage layers, 12 secondary anti-seepage layers, 13 protective layers under the membrane, 14 reinforced soil layers, and 15 lower protective layers.

detailed description

The specific embodiments of the present utility model will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1-2, the utility model relates to a vertical expansion structure for landfills, including the original landfill 1 and the original landfill 2, and also includes a liner system 3, new waste The landfill 4 and the new dam 5, the new dam 5 is set around the original landfill 2 on the original landfill 1, the liner system 3 is laid on the top of the new dam 5 as a whole, and the new dam 5, the original landfill 1 and the original landfill 2, and the new landfill 4 is stacked on the lining system 3 inside the new dam 5.

As a further embodiment, the liner system from top to bottom is the upper protective layer 6, the reverse filter layer 7, the leachate drainage layer 8, the protective layer 9 on the membrane, the main anti-seepage layer 10, the auxiliary anti-seepage Layer 11, secondary anti-seepage layer 12, protective layer 13 under the film, reinforced soil layer 14, and lower protective layer 15.

As a further embodiment, the upper protective layer 6 is medium sand with a thickness not less than 300 mm and a permeability coefficient not less than 2.0× ^{10 -2} cm/s; filter screen; the leachate drainage layer 8 is a geotechnical composite drainage network with a thickness of not less than 5.0mm; the protective layer 9 on the membrane is a non-woven geotextile with a specification of not less ^than 600g/m2; the main anti-seepage Layer 10 can be low-density polyethylene (LLDPE) geomembrane, flexible polypropylene (FPP) geomembrane, polyvinyl chloride (PVC) geomembrane and high-density polyethylene (HDPE) geomembrane; the auxiliary anti-seepage layer 11 is A sodium-based bentonite cushion (GCL) with a permeability coefficient not greater than 5.0×10 ^-9 cm/s and a specification not less than 4800 g/m ² ; the secondary anti-seepage layer 12 can be a low-density polyethylene (LLDPE) geomembrane, flexible poly Propylene (FPP) geomembrane, polyvinyl chloride (PVC) geomembrane and high-density polyethylene (HDPE) geomembrane; the protective layer 13 under the film is a non-woven geotextile with a specification of not less ^than 600g/m2; the added The reinforced soil layer 14 is a geogrid or a high-strength geotextile, and the lower protective layer 15 is compacted clay with a permeability coefficient not greater than 1.0×10 ⁻⁵ cm/s and a thickness not less than 300 mm.

The liner system 3 in the utility model is a double-layer liner system, and the newly added dam 5 must undergo safety and stability analysis, that is, through seepage calculation, anti-sliding stability calculation, shear strength calculation and deformation calculation; The specific specifications of each layer of the liner system 3 need to be determined according to the maximum tensile strain caused by uneven settlement of the landfill, and the properties of the selected liner layer materials must be able to meet the maximum tensile strain caused by uneven settlement.

The above descriptions are only preferred feasible embodiments of the present utility model, and are not intended to limit the scope of the present utility model.

Claims (3)

1. A vertical expansion structure for landfills, comprising former landfills and former landfills, characterized in that it also includes liner systems, new landfills and newly added dams, so The new dam mentioned above is installed around the original landfill on the original landfill, and the liner system is laid on the top of the new dam, the inner side of the new dam, the original landfill and the original landfill. , the new landfill is stacked on the liner system within the inside of the newly added dam. 2. The vertical expansion structure for landfill according to claim 1, characterized in that, the liner system consists of an upper protective layer, an anti-filtration layer, and a leachate drainage layer from top to bottom. , Protective layer on the membrane, main anti-seepage layer, auxiliary anti-seepage layer, secondary anti-seepage layer, protective layer under the membrane, reinforced soil layer, and lower protective layer. 3. The vertical expansion structure for landfill according to claim 2, characterized in that, the upper protective layer is a medium layer with a thickness not less than 300 mm and a permeability coefficient not less than 2.0×10 ^-2 cm/s. sand; the reverse filter layer is a geotechnical filter with a specification not less ^than 200g/m2; the leachate drainage layer is a geotechnical composite drainage network with a thickness not less than 5.0mm; the protective layer on the membrane is a specification not less than 600g/ ^m2 non-woven geotextile; the primary barrier layer can be low-density polyethylene (LLDPE) geomembrane, flexible polypropylene (FPP) geomembrane and polyvinyl chloride (PVC) geomembrane and high-density polyethylene (HDPE) geomembrane; the auxiliary anti-seepage layer is a sodium-based bentonite cushion (GCL) with a permeability coefficient not greater than 5.0×10 ^-9 cm/s and a specification not less than 4800g/m ² ; the secondary anti-seepage layer can be Low-density polyethylene (LLDPE) geomembrane, flexible polypropylene (FPP) geomembrane, polyvinyl chloride (PVC) geomembrane and high-density polyethylene (HDPE) geomembrane; the protective layer under the film is not less than 600g/ ^m2 of non-woven geotextile; the reinforced soil layer is geogrid or high-strength geotextile, and the lower protective layer is a compression layer with a permeability coefficient not greater than 1.0×10 ^-5 cm/s and a thickness not less than 300mm. solid clay.