CN205475357U

CN205475357U - A compound lining seepage prevention structure of double -deck HDPE membrane that is used for domestic waste landfill yard that seepage discharge is big

Info

Publication number: CN205475357U
Application number: CN201520889926.0U
Authority: CN
Inventors: 姜新新; 李雪薇; 吕永欢
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2015-11-10
Filing date: 2015-11-10
Publication date: 2016-08-17
Anticipated expiration: 2025-11-10

Abstract

The utility model discloses an adopt a compound lining seepage prevention structure of double -deck HDPE membrane that is used for domestic waste landfill yard that seepage discharge is big, the HDPE membrane that causes when can furthest reducing this moment because of the lining construction with the overburden construction destroys, and it includes geotechnological cloth, clay layer (thick 50cm), geotechnique's complex drainage scheme, two -layer HDPE membrane and GCL pad. The utility model discloses an anti -seepage system is: it is equally its guard action of HDPE membrane to the main barrier layer of conduct to lay one deck geotechnique's cloth and clay layer (favoring 50cm) and lay the HDPE membrane again after the drainage guide system construction completion is collected to filtration liquid, mainly be at this moment to the HDPE membrane protective as main barrier layer and prevent that the HDPE membrane receives temperature to change emergence breathing, avoid forming phenomenons such as swell, dead pleat in follow -up collection drainage guide system construction, then lay one deck geotechnique cloth again, laying the compound drainage scheme of geotechnique under this HDPE membrane, laying geotechnological cloth again and as the HDPE membrane of time barrier layer, lay GCL pads at last, it mainly acts on is sealed and the prevention of seepage, then is to accomplish basal layer and groundwater collection drainage guide system, and this is exactly double -deck HDPE membrane complex lining seepage prevention structure. This seepage prevention structure is suitable for the domestic waste landfill yard that the seepage discharge is big, presss from both sides some other impervious material between two -layer HDPE membrane, infiltration that can effectual prevention filtration liquid to and avoid polluting the groundwater water source, reduce the cost of environmental protection.

Description

A kind of double-deck HDPE film compound lining of the household refuse landfill sites big for seepage discharge Leakage preventing structure

Technical field

This utility model relates to the double-deck HDPE film compound lining leakage preventing structure of one way of life refuse landfill, particularly relates to The household refuse landfill sites that seepage discharge is big.

Background technology

Past is it has been recognized that rubbish and percolate thereof can be degraded by clay and subsoil water, without polluting Subsoil water.From the 1950's, the lasting research of some mechanisms of western countries shows, garbage loading embeading really can be impurely Lower water.And China is, over the past two decades, the harmless treatment rate of house refuse is had raising by a relatively large margin.In 1991, raw Rubbish processing to be harmless rate of living, less than 3%, substantially achieved 20% by 1998.Therefore, landfill site seepage prevention liner systems just becomes One of requisite facility of landfill yard, its effect is will to completely cut off inside and outside landfill yard, controls percolate and enters clay and subsoil water The generation amount of percolate is increased with stoping extraneous water to enter landfill yard.The versatile material of this system mainly has clay and artificial conjunction Becoming material, synthetic material is most commonly used that high density polyethylene (HDPE), i.e. HDPE, and antiseep research is mainly with the seepage of HDPE Launch.Wherein the monitoring of the landfill yard lining that one, the U.S. is best shows, in engineering best in quality, that expense is the highest, The percolation ratio of HDPE is 20L/(hm2d), this seepage is that the duck eye stayed when the pinprick owing to staying when manufacturing and construction causes 's.Additionally, due to the leak and the HDPE film that produce when landfill allow that some chemical substances are passed through, percolation ratio can be bigger, over the ground The pollution of lower water is the biggest.Therefore, in order to prevent underground water pollution, the improvement of refuse landfill leakage preventing structure is the heaviest Want.

Double-deck HDPE film is used to be primarily due to it:

1: antiseepage coefficient high antiseepage film has the anti-seepage effect that common waterproof material is incomparable, and HDPE antiseepage film has High-strength pulling-resisting stretches mechanicalness, and elasticity and deformability that it is excellent make it be highly suitable for expansion or shrinkage basal plane, can effective gram Take the differential settlement of basal plane.

2: chemical stability antiseepage film has the chemical stability of excellence, is widely used in sewage disposal, chemical reaction Pond, refuse landfill.

3: ageing-resistant performance antiseepage film has outstanding aging resistance, uvioresistant, antidecomposition ability, can exposed use, The materials'use life-span reaches 50-70, provides good material to ensure for environmental barrier.

4: low cost high efficiency HDPE antiseepage film uses new technique to improve anti-seepage effect, makes production technology more section , speed victory, so product cost is on the contrary less than conventional waterproof material, the common engineering calculating employing HDPE antiseepage film through reality is wanted Cost-effective about 50%.

This utility model uses GCL pad rather than compacting soil, is because GCL pad and is solving sealing, isolation, antiseep problem The effect of aspect is fine, and anti-destructive is strong.It is essential that through checking computations, the compacting soil role phase that 1.2m is thick When the GCL pad thick in 6mm, so having only to lay the GCL pad of 10mm in the case of laying the thick compacting soil of 2m, and Effect is better than compacting soil.

Summary of the invention

In view of this, the purpose of this utility model is to provide one more effectively to reduce consumer waste landfill percolate Method to underground water pollution.

In order to reach above-mentioned purpose, solution of the present utility model is: complete at leachate collection guide system construction One layer of geotextiles of rear laying and argillic horizon (thick 50cm) re-lay HDPE film, are now mainly the HDPE film as main impervious barrier Shield and prevent HDPE film by temperature Change generation breathing, it is to avoid in later collection guide system construction, forming drum The phenomenons such as bag, deadfold, then re-lay one layer of geotextiles, are to shield the HDPE film as main impervious barrier equally；Should Lay soil engineering composite drainage network under HDPE film, re-lay geotextiles and the HDPE film as time impervious barrier, finally lay GCL pad, Its Main Function is to seal and antiseepage, has been then basal layer and subsoil water collection guide system.

The geotextiles of described double-deck HDPE film compound lining leakage preventing structure, it is by middle terylene short fiber layer and upper layer Polypropylene long fibre layer constitute, and this three-decker is combined with each other closely, and specification is no less than 600g/m², work as employing When sewing up overlap joint, its lap width is 75 ± 15mm, has good endurance quality.

The argillic horizon of described double-deck HDPE film compound lining leakage preventing structure, its thickness is 50cm, infiltration coefficient is less than 10^- ⁷cm/s。

The HDPE film of described double-deck HDPE film compound lining leakage preventing structure, its thickness is no less than 1.5mm, and the fabric width of film is not Preferably less than 6.5m, and its outward appearance need to meet: otch is straight, without obvious crenellated phenomena；Do not allow to there is perforation and repair point；Every square Stiff block in meter is less than 10 pieces；Do not exist or mechanical mark is inconspicuous；Do not allow to there is bubble and impurity.

The GCL pad of described double-deck HDPE film compound lining leakage preventing structure, its surface should be smooth, and thickness is uniform, without broken hole, breaks Limit phenomenon, and unit are gross mass is no less than 4800g/m², wherein unit are bentonite quality is no less than 4500g/ m²；Bentonite volumetric expansion degree is no less than 24mL/2g；Tensile strength is no less than 800N/10cm；Peel strength is no less than 65N/10cm；Infiltration coefficient should be less than 5 × 10^-11m/s；Hydrostatic pressure resistant power 0.6MPa/1h；Ne-leakage.

Profitable fruit of the present utility model is: leakage preventing structure of the present utility model is mainly by geotextiles, argillic horizon, HDPE Film, soil engineering composite drainage network and GCL pad composition, its principle is to set drainage blanket between two impervious barriers, is used for controlling and collecting The liquid oozed out from landfill yard, the main impervious barrier on top and the secondary impervious barrier of bottom all use HDPE film, and impervious barrier On be leachate collection guide system, lower section is subsoil water collection system.This bilayer HDPE film compound lining leakage preventing structure has Have that resistant to damage ability is strong, robustness good, good seepage-proof property, high safety, and can more effectively stop percolate to pass through, with protection Subsoil water is the most contaminated, reduces the cost of later stage environmental conservation.

Accompanying drawing explanation

Fig. 1 is double-deck HDPE film compound lining leakage preventing structure schematic diagram of the present utility model

In figure, 1, leachate collection guide system, 2, geotextiles, 3, argillic horizon, 4, HDPE film, 5, geosynthetics draining Net, 6, GCL pad, 7, basal layer, 8, subsoil water collect guide system.

Detailed description of the invention

Referring to the drawings 1, leakage preventing structure of the present utility model is that the situation of the household refuse landfill sites big based on seepage discharge sets Put, be the double-deck HDPE film compound lining leakage preventing structure of a kind of household refuse landfill sites big for seepage discharge, it is characterized by: Leachate collection guide system 1 lays one layer of geotextiles 2 and the argillic horizon 3 of thick 50cm after having constructed, re-lay HDPE film 4, Now be mainly the HDPE film 4 as main impervious barrier shielded and prevents HDPE film by temperature Change generation breathing, Avoid being formed the phenomenon such as bulge, deadfold in later collection guide system construction, then re-lay one layer of geotextiles 2, be equally HDPE film 4 as main impervious barrier is shielded；Lay soil engineering composite drainage network 5 under this HDPE film, re-lay geotextiles 2 With the HDPE film 4 as secondary impervious barrier, finally laying GCL pad 6, its Main Function is to seal and antiseepage, has been then basis 7 Guide system 8 is collected with subsoil water.

Claims

1. it is used for a double-deck HDPE film compound lining leakage preventing structure for the big household refuse landfill sites of seepage discharge, including geotechnique Cloth, the thick argillic horizon of 50cm, soil engineering composite drainage network, two-layer HDPE film and GCL pad, is characterized in that: in leachate collection guide System construction lays one layer of geotextiles and the argillic horizon of thick 50cm after completing, re-lay HDPE film, then lays one layer of geotextiles And soil engineering composite drainage network, re-lay geotextiles and the HDPE film as time impervious barrier, finally lay GCL pad, then complete Basal layer and subsoil water collect guide system.

The double-deck HDPE film compound lining of a kind of household refuse landfill sites big for seepage discharge is prevented Ooze structure, it is characterised in that: the geotextiles of described double-deck HDPE film compound lining leakage preventing structure, it is by middle terylene short fiber layer Long fibre layer is constituted with the polypropylene of upper layer, and this three-decker is combined with each other closely, and specification is no less than 600g/ m², when using stitching overlap joint, its lap width is 75 ± 15mm, has good endurance quality.

The double-deck HDPE film compound lining of a kind of household refuse landfill sites big for seepage discharge is prevented Ooze structure, it is characterised in that: the argillic horizon of described double-deck HDPE film compound lining leakage preventing structure, its thickness is 50cm, infiltration system Number is less than 10^-7cm/s。

The double-deck HDPE film compound lining of a kind of household refuse landfill sites big for seepage discharge is prevented Ooze structure, it is characterised in that: the HDPE film of described double-deck HDPE film compound lining leakage preventing structure, its thickness is no less than 1.5mm, The fabric width of film is not preferably less than 6.5m.

The double-deck HDPE film compound lining of a kind of household refuse landfill sites big for seepage discharge is prevented Ooze structure, it is characterised in that: the GCL pad of described double-deck HDPE film compound lining leakage preventing structure, and unit are gross mass do not answers Less than 4800g/m², wherein unit are bentonite quality is no less than 4500g/m²；Bentonite volumetric expansion degree is no less than 24mL/2g；Tensile strength is no less than 800N/10cm；Peel strength is no less than 65N/10cm；Infiltration coefficient should be less than 5 × 10^-11m/s；Hydrostatic pressure resistant power 0.6MPa/1h；Ne-leakage.