CN203383316U

CN203383316U - Municipal solid waste sanitary landfill percolate leakage monitoring structure

Info

Publication number: CN203383316U
Application number: CN201320505229.1U
Authority: CN
Inventors: 徐建玲; 王汉席
Original assignee: Northeast Normal University
Current assignee: Northeast Normal University
Priority date: 2013-08-19
Filing date: 2013-08-19
Publication date: 2014-01-08
Anticipated expiration: 2023-08-19

Abstract

The utility model relates to a municipal solid waste sanitary landfill percolate leakage monitoring structure. The structure is characterized in that when the direct foundation stratum is a viscous soil layer, drainage ditches are formed in the direct foundation stratum, the drainage ditches are located below an anti-leakage structure layer and are attached to the anti-leakage structure layer, the drainage ditches are filled with medium-coarse sand, and the drainage ditches are arranged in both an annular mode and a radial mode; blind ditches are formed in the direct foundation stratum, the blind ditches are located below the anti-leakage structure layer and are attached to the anti-leakage structure layer, the blind ditches are communicated with the drainage ditches, drainage pipes are arranged in the blind ditches, and the blind ditches are filled with gravel pack to protect the drainage pipes and guarantee the drainage effect of filter pipes in the drainage pipes; the top end of each drainage pipe is exposed from a waste dam, underground water or percolate is pumped and discharged by means of a water pump through a top opening of each drainage pipe, the filter pipes are the parts, located at the lowest position of base elevation of the direct foundation stratum, of the drainage pipes, and filter holes are formed in the filter pipes. The municipal solid waste sanitary landfill percolate leakage monitoring structure is simple, practical, capable of facilitating construction, and saving in investment. According to the municipal solid waste sanitary landfill percolate leakage monitoring structure, the structure is prevented from being damaged caused by settlement deformation of landfill bodies 7 during normal operation, the underground water pollution condition in a landfill can be detected directly, the pollution treatment range is narrowed, pollution treatment difficulty is reduced, and treatment cost is saved.

Description

A kind of municipal solid waste sanitary landfill leakage of leachate monitoring of structures

Technical field

The utility model relates to a kind of municipal solid waste sanitary landfill leakage of leachate monitoring of structures, the monitoring technology that belongs to municipal solid waste sanitary landfill leakage of leachate polluted underground water, lower mainly for groundwater table, msw landfill and impervious barrier are not had a negative impact, do not need to arrange the situation of underground water guide system, all applicable for plain type landfill yard and Valley Type Landfill Site.

Background technology

The method that the monitoring of leakage of current Leachate Treatment in Landfill of Municipal Solid Wastes mainly adopts " household refuse landfill sites pollution control criterion " (GB16889-2008) and " requirement of Sanitary Landfill environmental monitoring technology " (GB/T18772-2008) stipulates, arrange background well, catch pit, contamination well and pollution monitoring well.To underground water level lower than the landfill site seepage prevention structure layer, underground water does not have a negative impact to permeation-resisting structure layer, do not need to arrange catch pit, rely on this time regularly the contamination well around landfill yard and the sampling of pollution monitoring well are analyzed, to understand the groundwater pollution situation.Because contamination well and pollution monitoring well spacing have with a certain distance from the landfill zone, when monitoring pollution, Polluted area has been greater than the landfill zone, in addition, carry out governance process and also need certain hour owing to occur polluting, often, during this, percolate further enlarges the pollution of underground water.Therefore, the leakage of leachate polluted underground water is administered to technical difficulty is large and expense is higher.

Summary of the invention

The purpose of this utility model is to provide a kind of municipal solid waste sanitary landfill leakage of leachate monitoring of structures, it is simple and practical, easy construction, be a kind of percolation liquid of city life garbage landfill monitoring of leakage means of small investment, this monitoring of structures can be not destroyed because of the msw landfill sedimentation and deformation in normal operation process, can play the effect that landfill yard zone groundwater pollution situation the most directly detected, reduce the treatment range after polluting, also can reduce the pollution control difficulty, and can save control expense simultaneously.

The technical solution of the utility model is achieved in that a kind of municipal solid waste sanitary landfill leakage of leachate monitoring of structures, it is characterized in that: the stratum, direct foundation is viscous soil horizon, the stratum, direct foundation is provided with gutter, gutter is arranged under permeation-resisting structure layer and is pasting the location arrangements of permeation-resisting structure layer, filling medium coarse sand in gutter, gutter adopts annular configuration and radial arrangement to combine; Direct foundation arranges french drain on stratum, and french drain is positioned under permeation-resisting structure layer and is pasting the location arrangements of permeation-resisting structure layer, with gutter, is communicated with, and gutter is arranged in french drain, fills the gravel material in french drain; Expose at the waste dam place on the top of gutter, and water pump is by gutter top ports pump drainage underground water or percolate, and the pipeline that gutter is positioned at stratum, direct foundation substrate absolute altitude extreme lower position is the drainage floral tube, on the drainage floral tube, has treatment hole.

When stratum, described direct foundation is sandy soils, the pipeline that gutter is positioned at stratum, direct foundation substrate absolute altitude extreme lower position connects branch drain, branch drain is deep into below groundwater table, drainage floral tube on gutter is arranged on the following position of bottom groundwater table of arm, arm bottom end seal.

The annular configuration spacing distance in described gutter is 100m～200m, and radial arrangement interval angle is 30 °～60 °.

Good effect of the present utility model is its seepage situation that can directly monitor percolate, considers two kinds of different geological conditions of sand formation and viscous soil horizon, adopts respectively different structure, guarantees monitoring effect; In addition, when monitoring leakage of leachate to natural stratum, this monitoring pipe-line system can play again the effect of percolate or the contaminated underground water of guide seepage; Have simple in structurely, easy to operate, expense is low, and economically feasible is not affected by the sedimentation and deformation of msw landfill.

The accompanying drawing explanation

Fig. 1 is section arrangement figure of the present utility model.

Fig. 2 is the section arrangement figure that stratum, direct foundation of the present utility model is sandy soils.

Fig. 3 is french drain sectional view of the present utility model.

Fig. 4 is gutter of the present utility model, french drain plane arrangement structure figure.

Fig. 5 is branch drain structure chart of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail: as Fig. 1, shown in Fig. 3 and Fig. 4, a kind of municipal solid waste sanitary landfill leakage of leachate monitoring of structures, it is characterized in that: stratum, direct foundation 3 is viscous soil horizon, comprise clay, silt and silty clay, stratum, direct foundation 3 is provided with gutter 10, gutter 10 is arranged on the direct foundation layer 3 under permeation-resisting structure layer 6, for guaranteeing the guide effect, gutter 10 is being pasted permeation-resisting structure layer 6 and is being laid, the interior filling medium coarse sand in gutter 10, gutter 10 adopts annular configuration and radial arrangement to combine, the annular configuration spacing distance is 100m～200m, radial arrangement interval angle is 30 °～60 °, gutter 10 sectional dimensions are 100mm * 100mm, the effect that gutter is set is by the percolate of seepage in time in the organized french drain 9 that drains into substrate, french drain 9 be arranged on stratum, direct foundation 3 and permeation-resisting structure layer 6 under, with gutter 10, be communicated with, gutter 1 is arranged in french drain 9, and french drain 9 sectional dimensions are 100mm * 200mm, the drainage effect of drainage floral tube 4 in the interior filling gravel of french drain 9 material protection gutter 1 and assurance gutter 1, and pellet selects degree of rounding good, contain the shale amount lower than 1%, and grating is good, gutter 1 arranges in french drain 9, is the destruction that prevents that uneven settlement of foundation that imposed load that msw landfill 7 produces causes from causing pipe-line system, gutter 1 is positioned at the pipeline of stratum, direct foundation 3 substrate absolute altitude extreme lower positions and establishes drainage floral tube 4, on drainage floral tube 4, has treatment hole, and the treatment hole diameter is 5mm, and plum blossom-shaped is arranged, for guaranteeing long-term operation, drainage floral tube 4 length are not less than 5m, expose at waste dam 2 places on the pipe top of gutter 1, gutter 1 port seals with capping at ordinary times, during monitoring, open the port capping, gutter 1 port is by being connected pump drainage underground water or percolate with water pump 5, to pump drainage, percolate or underground water is out detected, and the leakage pollution situation according to testing result judgement percolate provides foundation for pollution control simultaneously.

Gutter 1 adopts the steel pipe of external diameter 50mm～80mm, and wall thickness is not less than 4mm, and gutter 1 is embedded in french drain 9, and in order to meet water pump 5 pump drainage Capability Requirements, the Guan Ding of gutter 1 and the difference in height at the pipe end are not more than 10m.

As shown in Fig. 2,5, when stratum, described direct foundation 3 is sandy soils, stratum, direct foundation 3 does not arrange gutter 10, the pipeline that gutter 1 is positioned at stratum, direct foundation 3 substrate absolute altitude extreme lower positions connects branch drain 8, branch drain 8 is deep into below groundwater table and is not less than 4m, is provided with drainage floral tube 4 on branch drain 8, and drainage floral tube 4 is positioned at the following position of bottom groundwater table of branch drain 8, its length is not less than 1.0m, the branch drain bottom end seal.

This monitoring system, detecting permeation-resisting structure layer 6 failures, and leakage of leachate, can be using this monitoring system as underground water guide system in underground natural soil layer and underground water the time, pump drainage percolate or contaminated underground water.

Claims

1. a municipal solid waste sanitary landfill leakage of leachate monitoring of structures, it is characterized in that: the stratum, direct foundation is viscous soil horizon, the stratum, direct foundation is provided with gutter, gutter is arranged under permeation-resisting structure layer and is pasting the location arrangements of permeation-resisting structure layer, filling medium coarse sand in gutter, gutter adopts annular configuration and radial arrangement to combine; Direct foundation arranges french drain on stratum, and french drain is positioned under permeation-resisting structure layer and is pasting the location arrangements of permeation-resisting structure layer, with gutter, is communicated with, and gutter is arranged in french drain, fills the gravel material in french drain; Expose at the waste dam place on the top of gutter, and water pump is by gutter top ports pump drainage underground water or percolate, and the pipeline that gutter is positioned at stratum, direct foundation substrate absolute altitude extreme lower position is the drainage floral tube, on the drainage floral tube, has treatment hole.

2. according to a kind of municipal solid waste sanitary landfill leakage of leachate monitoring of structures described in claim 1, while it is characterized in that stratum, described direct foundation is sandy soils, the pipeline that gutter is positioned at stratum, direct foundation substrate absolute altitude extreme lower position connects branch drain, branch drain is deep into below groundwater table, drainage floral tube on gutter is arranged on the following position of bottom groundwater table of arm, arm bottom end seal.

3. according to a kind of municipal solid waste sanitary landfill leakage of leachate monitoring of structures described in claim 1, the annular configuration spacing distance that it is characterized in that described gutter is 100m～200m, and radial arrangement interval angle is 30 °～60 °.