CN201817824U - Antiseepage liner for bottom side slope of refuse landfill - Google Patents
Antiseepage liner for bottom side slope of refuse landfill Download PDFInfo
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- CN201817824U CN201817824U CN2010205701490U CN201020570149U CN201817824U CN 201817824 U CN201817824 U CN 201817824U CN 2010205701490 U CN2010205701490 U CN 2010205701490U CN 201020570149 U CN201020570149 U CN 201020570149U CN 201817824 U CN201817824 U CN 201817824U
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- side slope
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- bottom side
- antiseepage
- refuse landfill
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Abstract
The utility model discloses an antiseepage liner for a bottom side slope of a refuse landfill. A geocomposite drainage network groundwater drainage guide layer, a GCL (geosynthetic clay liner) assistance antiseepage layer, an HDPE (high density polyethylene) geomembrane main antiseepage layer, a geocomposite drainage network drainage guide layer, a geogrid reinforced layer, and a bagged soil protective layer are sequentially arranged from bottom to top, wherein a relatively smooth surface formed by the bagged soil and the geogrid can effectively reduce shearing force transmitted to a lower covering liner system in the refuse settling process; the geogrid reinforced layer can help to bear pulling force of the geomembrane and the GCL, so that adverse effects caused by the refuse settling are effectively reduced and the safety, reliability and durability of the antiseepage liner for the bottom side slope are improved; and by adopting the antiseepage liner with favorable antiseepage effect and strong refuse settling resistance, the antiseepage function on the side slope of a valley type landfill can be better realized.
Description
Technical field
The utility model relates to the leakage preventing structure in a kind of municipal administration and the environment-friendly engineering, relates in particular to the impervious lining of the anti-rubbish sedimentation of a kind of refuse landfill bottom side slope.
Background technology
China has built up more than 660 city refuse landfill of size at present, and the rubbish of dissolving every year reaches more than 1.2 hundred million tons, accounts for more than 90% of processed rubbish total amount.In order to prevent a large amount of poisonous and hazardous inorganic pollutions (heavy metals such as mercury, lead) and organic pollution (COD, BOD, phenol etc.) pollution surrounding enviroment in the percolate,, need one deck impervious lining system be set in the landfill yard bottom according to China's related specifications.(as rubbish from cooking and the big part article of easily degrading) are bigger because perishable rubbish in China's rubbish, cause rubbish to produce bigger sedimentation along side slope, " the dragging power down " that causes liner system to bear applying in the rubbish infall process, cause that easily liner system produces tensile failure, makes it every the seepage of oozing performance failure and causing percolate.
China's related specifications suggestion landfill site seepage prevention liner can adopt following four kinds of structures: composite pad system, HDPE geomembrane individual layer leakage preventing structure that the composite pad system that natural compacting clay liner, high-density polyethylene (HDPE) geomembrane and compacting argillic horizon are formed, HDPE geomembrane and geosynthetics bentonite liner (GCL) are formed.Natural compacting clay liner system is difficult to construct on the steeper side slope in landfill yard bottom, and other structural shapes are not all considered the adverse effect that the rubbish sedimentation causes.
Summary of the invention
The purpose of this utility model is to provide the impervious lining of the anti-rubbish sedimentation of a kind of refuse landfill bottom side slope, and it can reduce the impervious lining distortion that the slope liner system causes in the rubbish sedimentation effectively.
The technical solution adopted in the utility model is:
The utility model is from bottom to top successively by soil engineering composite drainage network underground water lead layer, GCL auxiliary seepage proof layer, high-density polyethylene geomembrane master impervious barrier, soil engineering composite drainage network lead layer, geo-grid reinforcement layer and packeted soil topping.
Described soil engineering composite drainage network underground water lead layer and soil engineering composite drainage network lead layer are made by draining web-roll core double face binding nonweaven geotextile.
Described GCL auxiliary seepage proof layer transmission coefficient is not more than 5 * 10-
9Cm/s, specification must not be less than 4800g/m
2
Described high-density polyethylene geomembrane master impervious barrier thickness is not less than 1.5mm.
Described geo-grid reinforcement layer adopts unidirectional HDPE geo-grid, and tensile strength is not less than 100kN/m.
Described packeted soil topping adopts ganoid woven bag to load sand or silt.
The beneficial effect that the utlity model has is:
1) interfacial friction factor of packeted soil topping and geo-grid reinforcement layer composition is less, can reduce being delivered to down the shearing that covers liner system in the rubbish infall process;
2) the geo-grid resistance to tension is stronger, can stop on the one hand that covering the liner system boundary strength develops into softening stress-displacement stage down, when sharing bigger pulling force with geomembrane and GCL when stressed, plays the purpose of protecting geomembrane and GCL on the other hand.
3) have the ability of good anti-seepage effect and anti-rubbish sedimentation, can realize the antiseepage function on the mountain valley-type landfill slope preferably.
Description of drawings
Accompanying drawing is a structural principle schematic diagram of the present utility model.
In the accompanying drawing: 1, soil engineering composite drainage network underground water lead layer, 2, GCL auxiliary seepage proof layer, 3, high-density polyethylene geomembrane master impervious barrier, 4, the soil engineering composite drainage network lead layer, 5, geo-grid reinforcement layer, 6, the packeted soil topping.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
As shown in drawings; the utility model is from bottom to top successively by soil engineering composite drainage network underground water lead layer 1, GCL auxiliary seepage proof layer 2, high density polyethylene (HDPE) (HDPE) geomembrane master impervious barrier 3; soil engineering composite drainage network lead layer 4, geo-grid reinforcement layer 5 and packeted soil topping 6.
Wherein geo-grid reinforcement layer is bigger because of its stretch modulus, can effectively reduce the adverse effect of rubbish sedimentation, has improved the security reliability and the endurance quality of bottom impervious lining.
Before laying the bottom impervious lining, a basal surface must carry out smooth, and it is closely knit that particularly crack, ditch, cavity etc. need filling.Soil engineering composite drainage network underground water lead layer 1 is made by draining web-roll core double face binding nonweaven geotextile; combine the function of nonweaven geotextile (anti-filter and protective effect) and geonet (drainage); drainage network water guide performance need satisfy in load 720kPa and 2% time permeability of gradient and is not less than the requirement that 2500m/d and flow rate are not less than 13pm/m; nonweaven geotextile need satisfy and punctures intensity and be not less than 580N and grip the requirement that hot strength is not less than 900N; the necessary termination in composite earthwork drainage network; adjacent geonet is coupled together with plastics button or polymer belt, simultaneously adjacent nonweaven geotextile is overlapped along material webs.GCL auxiliary seepage proof layer 2 transmission coefficient are not more than 5 * 10-
9Cm/s, specification must not be less than 4800g/m
2, should be selected in fine day during construction and carry out, should lay geomembrane as early as possible after finishing, prevent swell soil suction aquation in the GCL auxiliary seepage proof layer influence its internal shear intensity and with the boundary strength of geomembrane.High-density polyethylene geomembrane master impervious barrier 3 thickness are not less than 1.5mm; launch back welding in time; protect it not to be damaged during construction; forbid that vehicle directly travels on geomembrane; the requirement of soil engineering composite drainage network lead layer 4 is identical with soil engineering composite drainage network underground water lead layer 1; play the guide percolate and protect the effect of main impervious barrier; geo-grid reinforcement layer 5 adopts unidirectional HDPE geo-grid; tensile strength is not less than 100kN/m; adopt artificial tension to make its surfacing during construction; after finishing, construction in time lays packed topping 6; avoid it to be subjected to directly being exposed to the sun for a long time; packed topping 6 is formed the continuous topping of one deck by a plurality of packeted soils; wherein packeted soil can adopt ganoid woven bag to load sand or silt; reduce and the following friction factor that covers between the liner system, thereby play the effect of protecting impervious barrier.
The above-mentioned specific embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (6)
1. impervious lining that is used for refuse landfill bottom side slope; it is characterized in that: from bottom to top successively by soil engineering composite drainage network underground water lead layer (1); GCL auxiliary seepage proof layer (2); high-density polyethylene geomembrane master impervious barrier (3); soil engineering composite drainage network lead layer (4), geo-grid reinforcement layer (5) and packeted soil topping (6) are formed.
2. a kind of impervious lining that is used for refuse landfill bottom side slope according to claim 1, it is characterized in that: described soil engineering composite drainage network underground water lead layer (1) and soil engineering composite drainage network lead layer (4) are made by draining web-roll core double face binding nonweaven geotextile.
3. according to a kind of impervious lining that is used for refuse landfill bottom side slope shown in the claim 1, it is characterized in that: described GCL auxiliary seepage proof layer (2) transmission coefficient is not more than 5 * 10-
9Cm/s, specification must not be less than 4800g/m
2
4. a kind of impervious lining that is used for refuse landfill bottom side slope according to claim 1, it is characterized in that: described high-density polyethylene geomembrane master impervious barrier (3) thickness is not less than 1.5mm.
5. a kind of impervious lining that is used for refuse landfill bottom side slope according to claim 1, it is characterized in that: described geo-grid reinforcement layer (5) adopts unidirectional HDPE geo-grid, and tensile strength is not less than 100kN/m.
6. a kind of impervious lining that is used for refuse landfill bottom side slope according to claim 1, it is characterized in that: described packeted soil topping (6) adopts ganoid woven bag to load sand or silt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205701490U CN201817824U (en) | 2010-10-19 | 2010-10-19 | Antiseepage liner for bottom side slope of refuse landfill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205701490U CN201817824U (en) | 2010-10-19 | 2010-10-19 | Antiseepage liner for bottom side slope of refuse landfill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201817824U true CN201817824U (en) | 2011-05-04 |
Family
ID=43915787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205701490U Expired - Lifetime CN201817824U (en) | 2010-10-19 | 2010-10-19 | Antiseepage liner for bottom side slope of refuse landfill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201817824U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002961A (en) * | 2010-10-19 | 2011-04-06 | 浙江大学 | Impermeable gasket for bottom side slope of refuse landfill |
| CN102817379A (en) * | 2012-08-31 | 2012-12-12 | 中国市政工程西北设计研究院有限公司 | Upper protective layer structure of impervious barrier structure of municipal solid waste landfill |
| CN105143069A (en) * | 2013-02-11 | 2015-12-09 | Gse环境工程有限责任公司 | Leak detectable geomembrane liners and method and apparatus for forming |
| CN107219132A (en) * | 2017-05-31 | 2017-09-29 | 南昌大学 | A kind of simplification determination method of sodium-based bentonite waterproof carpet and geomembrane compound lining shear strength |
-
2010
- 2010-10-19 CN CN2010205701490U patent/CN201817824U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002961A (en) * | 2010-10-19 | 2011-04-06 | 浙江大学 | Impermeable gasket for bottom side slope of refuse landfill |
| CN102817379A (en) * | 2012-08-31 | 2012-12-12 | 中国市政工程西北设计研究院有限公司 | Upper protective layer structure of impervious barrier structure of municipal solid waste landfill |
| CN105143069A (en) * | 2013-02-11 | 2015-12-09 | Gse环境工程有限责任公司 | Leak detectable geomembrane liners and method and apparatus for forming |
| CN107219132A (en) * | 2017-05-31 | 2017-09-29 | 南昌大学 | A kind of simplification determination method of sodium-based bentonite waterproof carpet and geomembrane compound lining shear strength |
| CN107219132B (en) * | 2017-05-31 | 2020-01-21 | 南昌大学 | Simplified determination method for shear strength of bentonite waterproof blanket and geomembrane composite lining |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110504 |
|
| CX01 | Expiry of patent term |