CN102527702B - Method for detecting pollutants generated by leakage of leachate in landfill and repairing polluted soil - Google Patents

Method for detecting pollutants generated by leakage of leachate in landfill and repairing polluted soil Download PDF

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Publication number
CN102527702B
CN102527702B CN 201110460723 CN201110460723A CN102527702B CN 102527702 B CN102527702 B CN 102527702B CN 201110460723 CN201110460723 CN 201110460723 CN 201110460723 A CN201110460723 A CN 201110460723A CN 102527702 B CN102527702 B CN 102527702B
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China
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contaminated soil
test point
landfill
grouting
soil test
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CN 201110460723
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Chinese (zh)
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CN102527702A (en
Inventor
薛强
陈亿军
赵颖
陈朱蕾
李振泽
刘勇
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中国科学院武汉岩土力学研究所
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Publication of CN102527702A publication Critical patent/CN102527702A/en
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Abstract

The invention relates to a method for detecting pollutants generated by leakage of leachate in a landfill and repairing the polluted soil, and belongs to the technical field of environmental geotechnology. The method comprises the following steps: by reasonably setting polluted soil detecting points, according to the detected average concentration of pollutants at each polluted soil detecting point, drawing a distribution map of the concentration of pollutants in the polluted soil around the landfill, and determining grouting points; drilling grouting holes by a drilling device, and preparing grout by taking precipitated mud which is taken out in the drilling process as part of materials; and injecting the grout into all selected and new grouting holes by a grouting device, wherein the grouting holes can be connected into a cut-off wall body, the bottom of the whole cut-off wall body stretches into an impermeable layer, and an impermeable system can be effectively formed to achieve a very good permeability-preventing and repairing effect on the surrounding soil of the landfill. The method has the characteristics of high pollutant concentration detecting speed, reasonable arrangement of grouting points and grouting apertures, reuse of drilling mud, low construction cost and the like.

Description

Waste landfill site leachate leakage pollution quality testing is surveyed and is polluted native restorative procedure

Technical field

The present invention relates to a kind of waste landfill site leachate leakage pollution quality testing and survey and the native restorative procedure of pollution, belong to the environmental geotechnical technical field.

Background technology

The safety problem of refuse landfill seepage control project is the great strategic demand of National Environmental and security fields.Along with the continuous increase of China's domestic waste landfill disposal amount, the environment that produces in the landfill yard running and safe catastrophe problem highlight day by day.For a long time, numerous research institutions and scholar are carrying out a large amount of research work aspect the reduction of discharging of landfill pollutant and the control, obtained certain achievement, but the landfill yard ecological safety fails to obtain fine solution with stability control, there are many potential safety hazards and disastrous accident, especially informal refuse landfill or because the vertical dilatation of landfill yard, mechanical execution rolls etc. and to cause seepage control system to lose efficacy to cause causing that landfill yard oozes drop liquid potentiality and leaks, water and soil environment around polluting, cause the serious environmental geological disaster, caused showing great attention to of international environment Geotechnical Engineering circle.

At present, aspect landfill yard leakage pollution detection method, adopt usually in the antiseepage film and to arrange that variation that electrode detects resistivity in real time reflects the breakthrough of antiseepage film, but this method can not determine directly that the leakage pollution thing is to pollution range and the pollution level of the peripheral soil of landfill yard; Whether soil pollutes although high-density electric instrument can determine landfill yard periphery, can not the quantitative assay pollution level and pollute the degree of depth; After detecting pollution range, how to repair and be a complex engineering problem, conventional concrete curing seepage proof curtain method is limited to effective antiseepage phase of oozing drop liquid of high concentration, the anti-seepage effect of in-situ solidifying grouting water-tight wall is subject to the influence of original position soil property, and whole construction technology also has great influence to anti-seepage effect.Therefore, on the prior art basis, by the existing instrument and equipment of reasonable utilization, effective waste landfill site leachate leakage pollution thing is detected and repairs is that the especially informal waste landfill site leachate potentiality of current refuse landfill leakage pollution needing to demand the Important Project difficult problem that solves urgently.

Summary of the invention

At the problem of above-mentioned existence, the object of the present invention is to provide that a kind of pollutant levels test speed is fast, slip casting point and the slip casting aperture is rationally distributed, the drilling slurry recycling, waste landfill site leachate leakage pollution quality testing that engineering cost is low is surveyed and pollute native restorative procedure.

To achieve these goals, its technical solution is: waste landfill site leachate leakage pollution quality testing is surveyed and is polluted native restorative procedure.

Described detection of oozing drop liquid leakage pollution thing is adopted:

A is being basic point along refuse landfill ground surface center, ooze drop liquid leakage pollution soil to refuse landfill ground surface periphery contaminated soil test point 2 is set radially, contaminated soil test point 2 arranges evenly that along the radiation direction each contaminated soil test point 2 spacing is 2-4m.

B measures the pollutant levels of each contaminated soil test point 2 different depths at the contaminated soil test point 2 usefulness pollutant levels original positions boring determinator of arranging 4, wireless pollutant levels testing arrangement 17 is installed in the drill bit 16 of pollutant levels original position boring determinator 4, measure once by the every 5-10 rice of drilling depth, till getting into impermeable stratum, wireless pollutant levels testing arrangement 17 is transmitted into determination data on the data sink 21.

C calculates the pollutant mean concentration of contaminated soil test point 2 according to the pollutant levels of each contaminated soil test point 2 different depths of measuring, draws refuse landfill periphery contaminated soil concentration distribution of pollutants figure.

Described reparation of oozing drop liquid leakage pollution soil is adopted:

D selects a contaminated soil test point 2 as slip casting point 3 by the setting of national formulation the " household refuse landfill sites pollutes control criterion GB16889-2008 " according to refuse landfill periphery contaminated soil concentration distribution of pollutants figure in the contaminated soil test point of evenly arranging on each bar radiation 2.

E on the air line distance of selecting slip casting point 3 on the adjacent radiation by every 1-1.5m apart from setting up slip casting point 3, and to all slip casting points 3 employing drilling equipments 5 brill injected holes, the aperture of injected hole is 1-1.5m, the injected hole degree of depth is till getting into impermeable stratum, and the glar that injected hole takes out is standby as injecting paste material.

F presses in the glar that takes out:

Glar 1

Clay 1

Curing agent is 0.05

Ratio preparation injecting paste material.

G adopts grouting device 1 to inject in the injected hole that all brill is good the injecting paste material of preparation.

Owing to adopted above technical scheme, waste landfill site leachate leakage pollution quality testing of the present invention is surveyed and is polluted native restorative procedure, the pollutant levels testing arrangement is installed in the drill bit of pollutant levels original position boring determinator can real-time convenient measurement, measurement data can be handled in wireless sending in the data sink, has saved the testing time; Draw out refuse landfill periphery concentration distribution of pollutants figure by the pollutant mean concentration of measuring rule layout test point, and determine the slip casting point according to the setting that country formulates " household refuse landfill sites pollutes control criterion GB 16889-2008 ", can under situation free from environmental pollution, dwindle the reparation radius, save rehabilitation cost; Drilling equipment can filter out the foreign material in the earth, and the glar that makes boring take out can have been saved the Master Cost of grouting serous fluid as the material of grouting serous fluid, saves the cost that slip casting is repaired; Utilize the set of clay and curing agent can give full play of the antiseepage effect of hardening slurry; By rational layout slip casting point with the slip casting aperture is set, make injected hole connect into a leakage proof wall, whole leakage proof wall bottom can form a seepage prevention system effectively up to impermeable stratum, and refuse landfill periphery soil is played good antiseepage repairing effect.

Description of drawings

Accompanying drawing 1 is three-dimensional structure schematic diagram of the present invention

Accompanying drawing 2 is horizontal layout schematic diagram of the present invention

Accompanying drawing 3 is the pollution concentration schematic diagram of test point on the radiation of the present invention

Accompanying drawing 4 is drilling equipment structural representation of the present invention

Accompanying drawing 5 is pollutant levels original position boring assay device structures schematic diagram of the present invention

Accompanying drawing 6 is grouting device structural representation of the present invention

The specific embodiment

Below in conjunction with accompanying drawing the present invention is explained in further detail.

See accompanying drawing

Waste landfill site leachate leakage pollution quality testing is surveyed and is polluted native restorative procedure.

Described detection of oozing drop liquid leakage pollution thing is adopted:

A is being basic point along refuse landfill ground surface center, ooze drop liquid leakage pollution soil to refuse landfill ground surface periphery contaminated soil test point 2 is set radially, contaminated soil test point 2 arranges evenly that along the radiation direction each contaminated soil test point 2 spacing is 2-4m.

B measures the pollutant levels of each contaminated soil test point 2 different depths at the contaminated soil test point 2 usefulness pollutant levels original positions boring determinator of arranging 4, pollutant levels original position boring determinator 4 comprises drill bit 16, drilling rod 18, wireless pollutant levels testing arrangement 17, rig 19, power set 20 and data sink 21, wireless pollutant levels testing arrangement 17 is installed in the drill bit 16 of pollutant levels original position boring determinator 4, drill bit 16 is connected with rig 19 by drilling rod 18, rig 19 provides energy by power set 20, measure once by the every 5-10 rice of drilling depth, till getting into impermeable stratum, wireless pollutant levels testing arrangement 17 is transmitted into determination data on the data sink 21.

C calculates the pollutant mean concentration of contaminated soil test point 2 according to the pollutant levels of each contaminated soil test point 2 different depths of measuring, draws refuse landfill periphery contaminated soil concentration distribution of pollutants figure.

Described reparation of oozing drop liquid leakage pollution soil is adopted:

D is according to refuse landfill periphery contaminated soil concentration distribution of pollutants figure, select a contaminated soil test point 2 as slip casting point 3 by the setting of country's formulation " household refuse landfill sites pollutes control criterion GB16889-2008 " in the contaminated soil test point of on each bar radiation, evenly arranging 2, setting such as the following table of main reference:

E on the air line distance of selecting slip casting point 3 on the adjacent radiation by every 1-1.5m apart from setting up slip casting point 3, and to all slip casting points 3 employing drilling equipments 5 brill injected holes, drilling equipment 5 is by slush pump 6, slotter 7, slurry supply pump 8, slurry tank 9, device 10 removes sand, tonified the slurry pump 12, storage vat 14 and slurry mixer 15 are formed, the mud that drilling equipment 5 provides boring to need by slurry tank 9 by slurry supply pump 8, the mud that slotter 7 gets out is transported in the device 10 that removes sand by slush pump 6, the device 10 that removes sand is discharged boring mud 11, the device 10 that removes sand turns back in the silt jar 9 mud recycling, storage vat 14 is imported clay in the silt mixer 15 and by first water source 13 mixing water is provided, tonified the slurry pump 12 is input to the mud that stirs the deficiency of replenishing cement mortar in the silt jar 9 in the silt jar 9, the aperture of injected hole is 1-1.5m, the injected hole degree of depth is till getting into impermeable stratum, and the glar that injected hole takes out is standby as injecting paste material.

F presses in the glar that takes out:

Glar 1

Clay 1

Curing agent is 0.05

Ratio preparation injecting paste material.

G adopts grouting device 1 to inject in the injected hole that all brill is good the injecting paste material of preparation, grouting device 1 is by slip casting shower nozzle 22, pump for mortar transmission 23, curing agent hopper 24, clay hopper 26 and mixing and blending machine 27 are formed, wherein curing agent is by in the curing agent hopper 24 input mixing and blending machines 27, clay is by in the clay hopper 26 input mixing and blending machines 27, the glar that injected hole takes out directly drops in the mixing and blending machine 27, not enough water is replenished by second water source 25, allow mixing and blending machine 27 fully stir and make injecting paste material, the injecting paste material that is mixed with injects in the injected hole by pump for mortar transmission 23 and by slip casting shower nozzle 22, the injected hole that injects grouting serous fluid connects into a leakage proof wall, whole leakage proof wall bottom is up to impermeable stratum, can form a seepage prevention system effectively, refuse landfill periphery soil is played good antiseepage repairing effect.

Claims (1)

1. waste landfill site leachate leakage pollution quality testing is surveyed and is polluted native restorative procedure, comprises to the detection of oozing drop liquid leakage pollution thing with to oozing the reparation of drop liquid leakage pollution soil, it is characterized in that:
Described detection of oozing drop liquid leakage pollution thing is adopted,
A is being basic point along refuse landfill ground surface center, ooze drop liquid leakage pollution soil to refuse landfill ground surface periphery contaminated soil test point (2) is set radially, contaminated soil test point (2) arranges evenly that along the radiation direction each contaminated soil test point (2) spacing is 2-4m;
B measures the pollutant levels of each contaminated soil test point (2) different depth with pollutant levels original position boring determinator (4) at the contaminated soil test point of arranging (2), wireless pollutant levels testing arrangement (17) is installed in the drill bit (16) of pollutant levels original position boring determinator (4), measure once by the every 5-10 rice of drilling depth, till getting into impermeable stratum, wireless pollutant levels testing arrangement (17) is transmitted into determination data on the data sink (21);
C calculates the pollutant mean concentration of contaminated soil test point (2) according to the pollutant levels of each contaminated soil test point (2) different depth of measuring, draws refuse landfill periphery contaminated soil concentration distribution of pollutants figure;
Described reparation of oozing drop liquid leakage pollution soil is adopted,
D selects a contaminated soil test point (2) as slip casting point (3) by the setting of national formulation the " household refuse landfill sites pollutes control criterion GB16889-2008 " according to refuse landfill periphery contaminated soil concentration distribution of pollutants figure in the contaminated soil test point of evenly arranging on each bar radiation (2);
E on the air line distance of selecting slip casting point (3) on the adjacent radiation by setting up slip casting point (3) every the 1-1.5m distance, and to all slip casting point (3) employing drilling equipment (5) brill injected holes, the aperture of injected hole is 1-1.5m, the injected hole degree of depth is till getting into impermeable stratum, and the glar that injected hole takes out is standby as injecting paste material;
F presses in the glar that takes out,
Glar 1
Clay 1
Curing agent is 0.05
Ratio preparation injecting paste material;
G adopts grouting device (1) to inject in the injected hole that all brill is good the injecting paste material of preparation.
CN 201110460723 2011-12-31 2011-12-31 Method for detecting pollutants generated by leakage of leachate in landfill and repairing polluted soil CN102527702B (en)

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CN105158301A (en) * 2015-10-16 2015-12-16 上海岩土工程勘察设计研究院有限公司 Polluted soil detection method based on cross-hole resistivity CT method
CN107497848A (en) * 2017-09-25 2017-12-22 南京律智诚专利技术开发有限公司 A kind of method of Determination of organochlorine pesticides in soil reparation
CN108130921B (en) * 2017-12-19 2018-12-25 浙江科技学院 The refuse landfill seepage control layer and its selfreparing anti-seepage method of intelligent drives selfreparing
CN109269944A (en) * 2018-11-09 2019-01-25 同济大学 A kind of experimental rig and test method monitoring landfill percolate horizontal proliferation

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