CN104963365A - Impermeable clay liner at bottom of refuse landfill and application thereof - Google Patents
Impermeable clay liner at bottom of refuse landfill and application thereof Download PDFInfo
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- CN104963365A CN104963365A CN201510385808.0A CN201510385808A CN104963365A CN 104963365 A CN104963365 A CN 104963365A CN 201510385808 A CN201510385808 A CN 201510385808A CN 104963365 A CN104963365 A CN 104963365A
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- clay
- illite
- kaolinite
- refuse landfill
- liner
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Abstract
The invention relates to an impermeable clay liner at the bottom of a refuse landfill and application thereof. The clay liner is formed by mixing kaolinite clay, illite clay and water and then crushing the mixture, and the porosity is smaller than or equal to 40 percent; the percentage of the mass of the kallinite clay accounting for the total mass of the kallinite clay and the illite clay is denoted as X, wherein 10%<=X<70%; the percentage of the mass of the illite clay accounting for the total mass of the kallinite clay and the illite clay is denoted as Y, wherein 30%<Y<=90%. By seriously controlling the porosity of the clay liner and the proportion of the kaolinite clay and the illite clay, the unexpected effect that a start hydraulic gradient (i0) starts to occur in the clay liner is generated, and therefore permeation of pollutant leachate can be stopped.
Description
Technical field
The invention belongs to landfill site seepage prevention field, relate to a kind of clay liner, be specifically related to the waterproof clay liner bottom a kind of refuse landfill and application thereof.
Background technology
China is populous nation, simultaneously Ye Shi Municipal Garbage Yield big country.Trash processing way conventional at present has three kinds, burning, landfill and compost.In various method of disposal, sanitary landfills is because of its safety and sanitation, disposal amount is large, efficiency is high advantage and being adopted widely, and the household garbage of China more than 80% all adopts landfill stabilization, and increasing refuse landfill is built.
For the rubbish in refuse landfill along with the time constantly degrades, can produce the pollutant of a large amount of high concentration, complicated, these pollutants can pass bed course by the mode of convection current and diffusion, thus to underground environment.In order to preventing pollution thing is to the pollution of underground environment, needs construction bottom refuse landfill to form clay liner, make its osmotic coefficient k≤10
-7cm/s, to guarantee that pollutant can not pass through clay liner.
Summary of the invention
The present invention seeks to provide waterproof clay liner bottom a kind of refuse landfill and application thereof to overcome the deficiencies in the prior art.
For achieving the above object, the technical solution used in the present invention is: the waterproof clay liner bottom a kind of refuse landfill, and it is form through rolling after the mixing of kaolinite clay, illite clay and water, its porosity≤40%; The percentage of the quality of described kaolinite clay and described kaolinite clay and described illite clay total amount is X, 10≤X < 70%; The percentage of the quality of described illite clay and described kaolinite clay and described illite clay total amount is Y, 30 < Y≤90%.
Optimally, the quality of described water and the percentage of described kaolinite clay and described illite clay total amount are 20 ~ 25%.
Optimally, the mineralogical composition of following mass fraction is comprised in described kaolinite clay:
Kaolinite 70 ~ 75%;
Illite 5 ~ 10%;
Montmorillonite 5 ~ 10%;
Quartz 10 ~ 20%.
Further, the mineralogical composition of following mass fraction is comprised in described illite clay:
Kaolinite 10 ~ 15%;
Illite 50 ~ 60%;
Montmorillonite 10 ~ 15%;
Quartz 15 ~ 20%.
Optimally, described kaolinite clay and described illite clay are the clay particle of particle diameter at below 1mm.
Optimally, described X is 10 ~ 30%, and described Y is 70 ~ 90%.
Optimally, described X is 30%, and described Y is 70%, and the percentage of the quality of described water and described kaolinite clay and described illite clay total amount is 22%.
Optimally, its effective drainage porosity≤8.5%.
Optimally, as Leachate site water level≤12m, the thickness >=20cm of described clay liner.
The present invention is also in particular to the application of waterproof clay liner in garbage loading embeading bottom a kind of above-mentioned refuse landfill, and bottom refuse landfill, construction formation thickness is more than or equal to the described clay liner of 20cm in advance, then landfill waste.
Because technique scheme is used, the present invention compared with prior art has following advantages: the waterproof clay liner bottom refuse landfill of the present invention, for forming through rolling after the mixing of kaolinite clay, illite clay and water, by the ratio of the porosity and kaolinite clay and illite clay that strictly control clay liner, achieve beyond thought effect: clay liner starts to occur initial hydraulic gradient (i
0), thus can the infiltration of block contaminant Leachate site.
Accompanying drawing explanation
The different initial hydraulic gradient that accompanying drawing 1 possesses when being the illite clay containing different proportion in the waterproof clay liner bottom refuse landfill of the present invention and transmission coefficient.
Detailed description of the invention
Waterproof clay liner bottom refuse landfill of the present invention, it is form through rolling after the mixing of kaolinite clay, illite clay and water, its porosity≤40%; The percentage of the quality of described kaolinite clay and described kaolinite clay and described illite clay total amount is X, 10≤X < 70%; The percentage of the quality of described illite clay and described kaolinite clay and described illite clay total amount is Y, 30 < Y≤90%.By strictly controlling the ratio of the porosity of clay liner and kaolinite clay, illite clay, which produces beyond thought effect: clay liner starts to occur initial hydraulic gradient (i
0), thus can the infiltration of block contaminant Leachate site; And the hydraulic gradient i of refuse landfill clay liner is less than its initial hydraulic gradient i
0time, can the infiltration of block water pollutant Leachate site completely.Wherein, the quality of water and the percentage of described kaolinite clay and described illite clay total amount are 20 ~ 25%.The mineralogical composition of following mass fraction is preferably comprised: kaolinite 70 ~ 75% in described kaolinite clay; Illite 5 ~ 10%; Montmorillonite 5 ~ 10%; Quartz 10 ~ 20%.The mineralogical composition of following mass fraction is preferably comprised: kaolinite 10 ~ 15% in described illite clay; Illite 50 ~ 60%; Montmorillonite 10 ~ 15%; Quartz 15 ~ 20%.The effect of the clay liner block contaminant Leachate site infiltration adopting above-mentioned kaolinite clay and illite clay to obtain is best.Described kaolinite clay and described illite clay are less than the clay particle of 1mm preferably past the particle diameter drying, pulverize and obtain after Screening Treatment, and such clay possesses less transmission coefficient after rolling.
Wherein, described X is preferably 10 ~ 30%, and described Y is preferably 70 ~ 90%, initial hydraulic gradient i now
0be greater than 45; And when X be preferably 30%, Y be preferably 70% time, the initial hydraulic gradient of refuse landfill clay liner can reach 60, and refuse landfill clay liner transmission coefficient reaches minimum substantially, initial hydraulic gradient i
0substantially reach maximum (as shown in Figure 1), now when the hydraulic gradient i of refuse landfill clay liner is less than i
0time, can the infiltration of block water completely.Effective drainage porosity≤the 8.5%(of refuse landfill clay liner and be greater than 0), owing to having certain Bound moisture in clay, therefore effective drainage porosity is that overall porosity deducts porosity corresponding to Bound moisture.And consider the highest Leachate site water level of China general≤12m, the thickness of above-mentioned refuse landfill clay liner needs to guarantee >=20cm, so just can guarantee the infiltration of complete block water.
Below in conjunction with accompanying drawing, the preferred embodiment of the invention is described in detail:
Embodiment 1
The present embodiment provides the waterproof clay liner bottom a kind of refuse landfill, add appropriate water mixing and stirring, and compacting forms by kaolinite clay and illite clay two kinds of clays.Kaolinite clay is the clay based on kaolinite, concrete mineral composition is: 71wt% kaolinite, 7wt% illite, 6wt% montmorillonite and 16wt% quartz, this clay through drying, pulverize, Screening Treatment and obtain the particle (recording this clay optimum moisture content is 19.70wt%) that particle diameter is less than 1mm.Illite clay is the clay based on illite, concrete mineral composition is: 11wt% kaolinite, 58wt% illite, 12wt% montmorillonite and 19wt% quartz, this clay through drying, pulverize, Screening Treatment and obtain the particle (recording this clay optimum moisture content is 18.80wt%) that particle diameter is less than 1mm.Kaolinite clay and illite clay carried out mixing (percentage that the quality defining illite clay accounts for described kaolinite clay and described illite clay total amount is Y) according to different quality ratio, the addition of concrete illite clay is respectively 0%, 10%, 30%, 50%, 70%, 90%.
In the present embodiment, form through common compacting the clay experiment bed course that thickness is 4cm after the clay of employing aforementioned proportion adds water and mixes, and be placed in flexible wall permeameter and carry out infiltration test, penetrating fluid adopts deionized water, assuming that experiment condition is: above landfill yard bottom cushion, rubbish body is 20m, waste density is 1g/cm
3, then confined pressure be set to 200kPa, the transmission coefficient recorded, initial hydraulic gradient i
0(in Fig. 1, abscissa refers to the addition of illite clay, and namely the quality of illite clay accounts for the percentage of described kaolinite clay and described illite clay total amount as shown in Figure 1; Ordinate is respectively transmission coefficient and the initial hydraulic gradient of clay liner); And the quality wherein adding water accounts for 22% of dry batching quality (dry batching quality is the quality sum of kaolinite clay and illite clay).In Fig. 1, along with the increase of illite clay addition, transmission coefficient reduces gradually, but all meets k≤1.0 × 10 that " Sanitary Landfill seepage control system engineering legislation " (CJ113-2007) specify
-7cm/s;
When in mixed clay during illite clay addition>=30%, illite and smectite composition total content>=27% in clay mineral, porosity≤40%, initial hydraulic gradient i
0start to occur, and initial hydraulic gradient i
0increase along with the increase of illite clay addition, when illite clay addition reaches 70%, transmission coefficient reaches minimum substantially, initial hydraulic gradient reaches maximum substantially, and now, porosity is 40%, effective drainage porosity is 8.5%(because Bound moisture is difficult to permeate, therefore, deduct porosity corresponding to Bound moisture with overall porosity, be effective drainage porosity).
Because the true landfill yard lead layer of China easily blocks, cause Leachate site depth rise, namely the highest Leachate site water level can reach the situation of 10 ~ 12m, mixed proportion in the present embodiment can be adopted to be the antiseepage bed course that 70wt% illite clay and 30wt% kaolinite clay form, in corresponding argillic horizon, illite and montmorillonite gross mass account for the percentage of the quality sum of kaolinite clay and illite clay is the quality sum that 53%(accounts for kaolinite clay and illite clay), complete fluid-tight antiseepage bed course can be formed when laying depth is 20cm.
Above-described embodiment is only for illustrating technical conceive of the present invention and feature; its object is to person skilled in the art can be understood content of the present invention and implement according to this; can not limit the scope of the invention with this; all equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (10)
1. the waterproof clay liner bottom refuse landfill, is characterized in that: it is for forming through rolling after the mixing of kaolinite clay, illite clay and water, its porosity≤40%; The percentage of the quality of described kaolinite clay and described kaolinite clay and described illite clay total amount is X, 10%≤X < 70%; The percentage of the quality of described illite clay and described kaolinite clay and described illite clay total amount is Y, 30% < Y≤90%.
2. the waterproof clay liner bottom refuse landfill according to claim 1, is characterized in that: the percentage of the quality of described water and described kaolinite clay and described illite clay total amount is 20 ~ 25%.
3. the waterproof clay liner bottom refuse landfill according to claim 1, is characterized in that, comprises the mineralogical composition of following mass fraction in described kaolinite clay:
Kaolinite 70 ~ 75%;
Illite 5 ~ 10%;
Montmorillonite 5 ~ 10%;
Quartz 10 ~ 20%.
4. the waterproof clay liner bottom the refuse landfill according to claim 1 or 3, is characterized in that, comprises the mineralogical composition of following mass fraction in described illite clay:
Kaolinite 10 ~ 15%;
Illite 50 ~ 60%;
Montmorillonite 10 ~ 15%;
Quartz 15 ~ 20%.
5. the waterproof clay liner bottom refuse landfill according to claim 1, is characterized in that: described kaolinite clay and described illite clay are the clay particle of particle diameter at below 1mm.
6. the waterproof clay liner bottom refuse landfill according to claim 1, is characterized in that: described X is 10 ~ 30%, and described Y is 70 ~ 90%.
7. the waterproof clay liner bottom refuse landfill according to claim 1, is characterized in that: described X is 30%, and described Y is 70%, and the percentage of the quality of described water and described kaolinite clay and described illite clay total amount is 22%.
8. the waterproof clay liner bottom the refuse landfill according to claim 1 or 7, is characterized in that: effective drainage porosity≤8.5% of described clay liner.
9. the waterproof clay liner bottom refuse landfill according to claim 7, is characterized in that: as Leachate site water level≤12m, the thickness >=20cm of described clay liner.
10. the application of waterproof clay liner in garbage loading embeading bottom the refuse landfill any one of claim 1-9 as described in claim, it is characterized in that: bottom refuse landfill, construction formation thickness is more than or equal to the described clay liner of 20cm in advance, then landfill waste.
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| CN201510385808.0A CN104963365B (en) | 2015-06-30 | 2015-06-30 | A kind of waterproof clay liner of refuse landfill bottom and its application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510385808.0A CN104963365B (en) | 2015-06-30 | 2015-06-30 | A kind of waterproof clay liner of refuse landfill bottom and its application |
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| CN104963365A true CN104963365A (en) | 2015-10-07 |
| CN104963365B CN104963365B (en) | 2017-06-27 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246033A (en) * | 2017-07-30 | 2017-10-13 | 扬州大学 | A kind of sand clay for refuse landfill base impervious cracking resistance mixes pad |
| CN107653916A (en) * | 2017-10-30 | 2018-02-02 | 滨州学院 | A kind of waterproof clay liner of super-hydrophobic self-healing |
| CN108226003A (en) * | 2017-12-14 | 2018-06-29 | 河海大学 | A kind of projectional technique of stratum absorption block characteristics |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0362193A2 (en) * | 1988-09-28 | 1990-04-04 | Girmes Gmbh | Process for sealing against the penetration of liquids and/or gases |
| CN1201062A (en) * | 1998-06-03 | 1998-12-09 | 吉林大学 | Setting of soil water-retaining film |
| JP2005097069A (en) * | 2002-09-19 | 2005-04-14 | Natoo Kenkyusho:Kk | Cold hydraulic treating material, effective utilization method for treating material, modified article modified with treating material, and inorganic formed article worked and prepared by treating material |
| CN1792979A (en) * | 2006-01-04 | 2006-06-28 | 湖南大学 | Process for mfg., impervious lining of refuse health filling field by urban sewage mud |
| CN102464474A (en) * | 2010-11-08 | 2012-05-23 | 天津市耀新科技发展有限公司 | Waterproof material |
| CN102966123A (en) * | 2012-11-29 | 2013-03-13 | 河海大学 | Double-layer clay liner for preventing seepage and resisting compression at bottom of refuse landfill |
-
2015
- 2015-06-30 CN CN201510385808.0A patent/CN104963365B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0362193A2 (en) * | 1988-09-28 | 1990-04-04 | Girmes Gmbh | Process for sealing against the penetration of liquids and/or gases |
| CN1201062A (en) * | 1998-06-03 | 1998-12-09 | 吉林大学 | Setting of soil water-retaining film |
| JP2005097069A (en) * | 2002-09-19 | 2005-04-14 | Natoo Kenkyusho:Kk | Cold hydraulic treating material, effective utilization method for treating material, modified article modified with treating material, and inorganic formed article worked and prepared by treating material |
| CN1792979A (en) * | 2006-01-04 | 2006-06-28 | 湖南大学 | Process for mfg., impervious lining of refuse health filling field by urban sewage mud |
| CN102464474A (en) * | 2010-11-08 | 2012-05-23 | 天津市耀新科技发展有限公司 | Waterproof material |
| CN102966123A (en) * | 2012-11-29 | 2013-03-13 | 河海大学 | Double-layer clay liner for preventing seepage and resisting compression at bottom of refuse landfill |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246033A (en) * | 2017-07-30 | 2017-10-13 | 扬州大学 | A kind of sand clay for refuse landfill base impervious cracking resistance mixes pad |
| CN107653916A (en) * | 2017-10-30 | 2018-02-02 | 滨州学院 | A kind of waterproof clay liner of super-hydrophobic self-healing |
| CN108226003A (en) * | 2017-12-14 | 2018-06-29 | 河海大学 | A kind of projectional technique of stratum absorption block characteristics |
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| Publication number | Publication date |
|---|---|
| CN104963365B (en) | 2017-06-27 |
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