CN111595747A - Model device for testing leakage of geomembrane composite vertical barrier and using method and application thereof - Google Patents
Model device for testing leakage of geomembrane composite vertical barrier and using method and application thereof Download PDFInfo
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Abstract
The invention discloses a model device for testing leakage of a geomembrane composite vertical barrier, and a use method and application thereof. The testing device can determine the seepage flow of the geomembrane composite vertical barrier, the influence of different barrier materials, the types of polluted liquid, the vertical stress and the seepage flow of the water stop strip on the geomembrane composite vertical barrier under the influence of factors such as damage and lap joint of the geomembrane. Meanwhile, the invention also provides a test method of the model device for testing the leakage of the geomembrane composite vertical barrier, which obtains hydrodynamic dispersion coefficient, retardation factor, effective diffusion coefficient, different barrier materials, vertical stress and the influence of a water stop strip on the leakage of the geomembrane composite vertical barrier by measuring the leakage flow, pollutant concentration, conductivity and pH value, and provides scientific basis for the design scheme of the geomembrane composite vertical barrier.
Description
Technical Field
The invention relates to the field of environmental and geotechnical engineering, in particular to a model device for testing leakage of a geomembrane composite vertical barrier and a using method and application thereof.
Background
The vertical isolation engineering barrier is an in-situ isolation technology for controlling the migration of pollutants in polluted underground water and soil of a polluted site. Geomembrane composite vertical barriers are an important type of vertical insulation engineering barrier. In the construction process of the geomembrane composite vertical barrier, the seepage-proofing performance of the geomembrane composite vertical barrier is reduced due to the damage of the geomembrane caused by human or accidental factors, and the seepage-proofing performance of the geomembrane composite vertical barrier is also reduced due to the lap joint form between the geomembranes, the type of the water stop strip material polluted liquid and the like. The difference that different barrier material types such as a soil-bentonite series vertical barrier material, a soil-cement-bentonite series vertical barrier material, a cement-bentonite series vertical barrier material or a magnesium oxide excited slag bentonite vertical barrier material continuously play a role in seepage prevention when the geomembrane leaks is greatly different, and the difference of stress caused by the depth of the soil body is also an important factor of the seepage prevention performance of the geomembrane composite vertical barrier.
At present, the problem of seepage of a geomembrane composite vertical barrier is not researched by considering factors of geomembrane seepage, lap joint form, water stop strip material, stress influence and barrier material, and a corresponding model device is lacked.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a model device for testing the leakage of a geomembrane composite vertical barrier and a using method and application thereof, the device can realize the shadows based on geomembrane leakage, lap joint form, water stop strip material, pollution liquid type, stress influence and barrier material (including one of soil-bentonite series vertical isolation material, soil-cement-bentonite series vertical isolation material, cement-bentonite series vertical isolation material or magnesia-excited slag bentonite vertical isolation material, or composite structure material of soil-bentonite series vertical isolation material, soil-cement-bentonite series vertical isolation material, cement-bentonite series vertical isolation material or magnesia-excited slag bentonite vertical isolation material, wherein a sand layer with the thickness of 1-2cm is clamped at the position parallel to the central axis).And (3) noise factors, simulating the leakage problem of the geomembrane composite vertical barrier, and measuring the flow, pollutant concentration, conductivity and pH value of the percolate to obtain a hydrodynamic dispersion coefficient D and a hysteresis factor RdAnd effective diffusion coefficient D*。
A model device for testing the leakage of a geomembrane composite vertical barrier comprises a bottom plate, a lower porous backing plate, a lower model box, a lower side wall, a geomembrane clamping plate with a geomembrane, an upper model box, an upper side wall, an upper porous backing plate and a cover plate; the bottom plate is provided with a lower porous base plate, and the bottom plate is longer than the lower porous base plate; the device comprises a bottom plate, a lower porous base plate, a force sensor, a data collector, a mechanical sensor, a bidirectional valve pipeline, a measuring cylinder and a pressure sensor, wherein the lower porous base plate is provided with a lower model box, the periphery of the lower model box is provided with a lower side wall which is padded on the bottom plate and has the same height with the bottom plate, a geomembrane clamping plate with a geomembrane is placed above the lower side wall, the geomembrane clamping plate is provided with an upper model box, the periphery of the upper model box is provided with an upper side wall, the upper porous base plate and a cover plate are sequentially arranged above the upper model box, the center of the bottom of the upper porous base plate is provided with the force sensor, the lower surfaces of; the lower part model box and the upper part model box are both hollow cylinders, hollow inner cavities are respectively a lower blocking material area and an upper blocking material area, a pipeline which is back to the lower blocking material area and faces outwards is arranged on the bottom plate, and a pressure gauge, a lower two-way valve, a water tank, a pneumatic control valve and an air compressor are sequentially arranged on the pipeline; the upper side wall, the geomembrane clamping plate, the lower side wall and the bottom plate are fixedly connected into a whole through bolts, the inner side end of the geomembrane clamping plate, the inner wall of the lower part model box and the inner wall of the upper part model box are flush, and the data collector is positioned outside the upper part barrier material area.
As a modification, the lower and upper mold boxes are made of organic glass, and have an inner diameter of 0.25m and a height of 0.1 m.
The improvement is that the bottom plate, the geomembrane splint, the cover plate, the lower porous backing plate and the upper porous backing plate are all made of polytetrafluoroethylene.
The improvement is that the lower porous backing plate and the upper porous backing plate have an opening rate of 85%, and the holes are communicated through the grooves.
As an improvement, a rubber sealing ring is arranged between the cover plate and the upper side wall, so that no gap is reserved between the upper porous base plate, the cover plate and the upper model box.
The use method of the model device for testing the leakage of the geomembrane composite vertical barrier comprises the following steps:
step 2, filling a lower barrier material area by controlling slump, and adding water for saturation after filling is finished;
step 3, placing the force sensor on the upper porous backing plate, placing the force sensor on the filler in the lower barrier material area, then placing the cover plate, connecting the cover plate with a pipeline with the two-way valve, and placing the measuring cylinder below the other end of the pipeline;
step 5, closing the upper two-way valve, stopping loading, removing the upper porous backing plate, the heightening plate, the cover plate, the force sensor, the data collector, the upper two-way valve and the measuring cylinder, removing the lower blocking material region higher than the lower model box, sequentially covering the upper porous backing plate, the lower porous backing plate and the bottom plate, and connecting the upper porous backing plate, the heightening plate, the cover plate, the force sensor, the data collector, the upper two-way valve and the;
step 7, filling an upper barrier material area by controlling slump, and adding water for saturation after filling is finished;
8, placing a force sensor on the upper porous backing plate, placing the force sensor on the filler in the lower barrier material area, placing an upper cover plate, connecting a pipeline with an upper two-way valve on the cover plate, placing a measuring cylinder below the other end of the pipeline, and connecting the lower porous backing plate with a pressure gauge, a lower two-way valve, a water tank, an air pressure control valve and an air compressor through the pipeline;
and 11, respectively measuring the flow, the pollutant concentration, the conductivity and the pH value of the collected solution, and fitting data according to the formula (1) to obtain a hydrodynamic dispersion coefficient D and a retardation factor RdThe effective diffusion coefficient D is obtained from the formulae (2), (3) and (4)*；
D＝D*+DmdFormula (2)
D*＝τD0(3)
Dmd＝αLu type (4)
In formula (2), c is the left-side contaminant concentration; c. C0Right pollutant concentration; v is the seepage velocity; t is time; rdIs the retardation coefficient; d is hydrodynamic dispersion coefficient; x is the calculated distance; dmdIs the mechanical dispersion coefficient; d*Is effective diffusion coefficient, tau is bending factor of soil pore space, αLIs the longitudinal dispersion.
As a refinement, the height of the raised panel is greater than 10 cm.
The improvement is that the filler in the step 2 and the step 7 is one of a soil-bentonite series vertical isolation material, a soil-cement-bentonite series vertical isolation material, a cement-bentonite series vertical isolation material or a magnesium oxide excited slag bentonite series vertical isolation material, or a composite structure material of the soil-bentonite series vertical isolation material, the soil-cement-bentonite series vertical isolation material, the cement-bentonite series vertical isolation material or the magnesium oxide excited slag bentonite series vertical isolation material, wherein a sand soil layer with the thickness of 1-2cm is clamped at the position parallel to the central axis, and the position is 0-10cm away from the central axis.
The model device for testing the leakage of the geomembrane composite vertical barrier is applied to retarding the migration of pollutants.
The improvement is that the pollutant is heavy metal polluted liquid or organic polluted liquid.
Has the advantages that:
compared with the prior art, the model device for testing the leakage of the geomembrane composite vertical barrier and the using method and application thereof have the following advantages:
1) the monitoring of the leakage of the geomembrane composite vertical barrier is realized. The seepage problem of the geomembrane composite vertical barrier is simulated by the influence factors based on geomembrane seepage, lap joint form, water stop strip material, pollution liquid type, stress influence and barrier material (comprising soil-bentonite series vertical isolation material, soil-cement-bentonite series vertical isolation material, cement-bentonite series vertical isolation material or magnesium oxide excited slag bentonite vertical isolation material), and the flow, the pollutant concentration, the conductivity and the pH value of seepage liquid are measured. Providing scientific basis for evaluating the seepage-proofing performance change caused by the leakage problem of the geomembrane composite vertical barrier in the operation process;
2) the method realizes the analysis of the seepage influence of the geomembrane composite vertical barrier caused by the uneven distribution of the barrier material due to construction, such as a sand layer with the height of 1-2cm, and determines the flow, the pollutant concentration, the conductivity and the pH value of the seepage liquid. Providing scientific basis for evaluating the seepage-proofing performance change caused by the leakage problem of the geomembrane composite vertical barrier in the operation process;
3) the influence analysis of the relative position of the sand layer and the geomembrane leakage point caused by uneven distribution of the barrier material due to construction on the leakage amount of the geomembrane composite vertical barrier is realized, and the flow, the pollutant concentration, the conductivity and the pH value of the seepage liquid are measured. Providing scientific basis for evaluating the seepage-proofing performance change caused by the leakage problem of the geomembrane composite vertical barrier in the operation process;
4) the test cost is low, and the operation is simple and convenient. The seepage problem and the seepage-proofing characteristic of the geomembrane composite vertical barrier under various conditions can be simulated by changing factors such as the overlapping form of the geomembrane, the material of the water stop strip, the type of polluted liquid, stress and the like.
Drawings
Fig. 1 is a schematic structural view of a model device for testing leakage of a geomembrane composite vertical barrier according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an apparatus used in steps 1 to 3 in example 2 of the present invention;
the device comprises a base plate 1, a lower model box 2, a geomembrane clamping plate 3, an upper model box 4, a cover plate 5, an upper isolating material area 6, a lower isolating material area 7, a lower porous pad 8, an upper porous pad 9, a force sensor 10, a data collector 11, a geomembrane 12, a bolt 13, an upper two-way valve 14, a measuring cylinder 15, a pressure gauge 16, a lower two-way valve 17, a water tank 18, an air pressure control valve 19, an air compressor 20, a rubber sealing ring 21, a heightening plate 22, a special-shaped plate 23, a lower side wall 24, an upper side wall 25 and a pipeline 26.
Detailed Description
The invention is further described with reference to specific examples.
Example 1
A model device of a vertical isolation engineering barrier based on dry-wet circulation comprises a bottom plate 1, a lower porous backing plate 8, a lower model box 2, a lower side wall 24, a geomembrane clamping plate 3 with an geomembrane, an upper model box 4, an upper side wall 25, an upper porous backing plate 9 and a cover plate 5; a lower porous base plate 8 is arranged on the bottom plate 1, and the bottom plate 5 is longer than the lower porous base plate 8; a lower part model box 2 is arranged on the lower porous backing plate 8, a lower side wall 24 which is padded on the bottom plate 1 and has the same height is arranged at the periphery of the lower part model box, a geomembrane clamping plate 3 with a geomembrane 12 is placed above the lower side wall 24, an upper part model box 4 is arranged on the geomembrane clamping plate 3, an upper side wall 25 is arranged at the periphery of the upper part model box 4, an upper porous backing plate 9 and a cover plate 5 are sequentially arranged above the upper part model box, a force sensor 10 is arranged at the center of the bottom of the upper porous backing plate 9, the lower surfaces of the upper porous backing plate 9 and the force sensor 10 are flush, the mechanical sensor 10 is connected with a data collector 11, a pipeline 14 with a two-way valve is arranged on the upper porous backing plate 9; the lower model box 2 and the upper model box 4 are both hollow cylinders, hollow inner cavities are respectively a lower barrier material area 7 and an upper barrier material area 6, a pipeline 26 facing away from the lower barrier material area 7 is arranged on the bottom plate 1, and a pressure gauge 16, a lower two-way valve 17, a water tank 18, an air pressure control valve 19 and an air compressor 20 are sequentially arranged on the pipeline 26; the upper side wall 25, the geomembrane clamping plate 3, the lower side wall 24 and the bottom plate 1 are fixedly connected into a whole through bolts, the inner side end of the geomembrane clamping plate 3, the inner wall of the lower model box 2 and the inner wall of the upper model box 4 are flush, and the data collector 11 is positioned outside the upper barrier material area 6.
The lower model box 2 and the upper model box 4 are made of organic glass materials, the middle part is separated by a geomembrane clamping plate 3 and a geomembrane 12, and the whole model box is in a sealing state during the test. The test device is assembled in two steps, wherein in the first step, the lower model box 2, the special-shaped plate 23, the heightening plate 22, the upper porous backing plate 9 and the cover plate 5 are assembled firstly to perform consolidation test on the lower isolation material area 7, in the second step, the special-shaped plate 23 and the heightening plate 22 are removed, the bottom plate 1, the lower model box 2, the geomembrane clamping plate 3, the upper model box 4, the cover plate 5, the lower porous backing plate 8 and the upper porous backing plate 9 are assembled, the upper isolation material area 6 is consolidated, and then the leakage test is performed. The inside of the lower and upper mold boxes 2 and 4 had a diameter of 0.25m and a height of 0.1 m. The bottom plate 1, the geomembrane clamping plate 3, the cover plate, the lower porous backing plate 8 and the upper porous backing plate 9 are all made of Polytetrafluoroethylene (PTFE). Rubber sealing rings 21 are arranged between the upper porous backing plate 9, the cover plate 5 and the upper model box 4, so that no gap is reserved between the upper porous backing plate 9, the cover plate 5 and the upper model box 4. The lower porous backing plate 8 and the upper porous backing plate 9 have an opening ratio of 85%, and the holes are communicated with each other through grooves. The profile plate 23 is the same shape as one side of the geomembrane 12.
Example 2
The use method of the model device for testing the leakage of the geomembrane composite vertical barrier comprises the following steps:
step 2, filling a lower barrier material area 7 formed in the lower model box 2 by controlling slump, and adding water for saturation after filling;
step 3, placing a force sensor 10 on an upper porous backing plate 9, placing the force sensor on the filler of a lower barrier material area 7, then placing a cover plate 5, connecting the cover plate 5 with a pipeline with a two-way valve 14, and placing a measuring cylinder below the other end of the pipeline;
step 5, closing the upper two-way valve 14, stopping loading, removing the upper porous backing plate 9, the heightening plate 22, the cover plate 5, the force sensor 10, the data collector 11, the upper two-way valve 14 and the measuring cylinder 15, removing the lower blocking material area 7 higher than the lower model box 2, sequentially covering the upper porous backing plate 8 and the bottom plate 1, and connecting the upper porous backing plate and the bottom plate by using bolts 13;
7, filling an upper blocking material area 6 formed in the upper model box 4 by controlling slump, and adding water for saturation after filling;
8, placing a force sensor 10 on an upper porous backing plate 9, placing the force sensor on a filler of a lower barrier material area 7, placing an upper cover plate 5, connecting a pipeline with an upper two-way valve 14 on the cover plate 5, placing a measuring cylinder below the other end of the pipeline, and connecting a lower porous backing plate 8 with a pressure gauge 16, a lower two-way valve 17, a water tank 18, an air pressure control valve 19 and an air compressor 20 through pipelines;
and 11, respectively measuring the flow, the pollutant concentration, the conductivity and the pH value of the collected solution, and fitting data according to the formula (1) to obtain a hydrodynamic dispersion coefficient D and a retardation factor RdThe effective diffusion coefficient D is obtained from the formulae (2), (3) and (4)*；
D＝D*+DmdFormula (2)
D*＝τD0(3)
Dma＝αLv type (4)
In formula (2), c is the left-side contaminant concentration; c. C0Right pollutant concentration; v is the seepage velocity; t is time; rdIs the retardation coefficient; d is hydrodynamic dispersion coefficient; x is the calculated distance; dmdIs the mechanical dispersion coefficient; d*Is effective diffusion coefficient, tau is bending factor of soil pore space, αLIs the longitudinal dispersion.
Wherein, the filler in the step 2 and the step 7 is one of a soil-bentonite series vertical isolation material, a soil-cement-bentonite series vertical isolation material, a cement-bentonite series vertical isolation material or a magnesium oxide excited slag bentonite vertical isolation material, or a composite structure material of the soil-bentonite series vertical isolation material, the soil-cement-bentonite series vertical isolation material, the cement-bentonite series vertical isolation material or the magnesium oxide excited slag bentonite vertical isolation material, wherein a sandy soil layer with the thickness of 1-2cm is clamped in the position parallel to the central axis, and the position is 0-10cm away from the central axis.
Claims (10)
1. The model device for testing the leakage of the geomembrane composite vertical barrier is characterized by comprising a bottom plate (1), a lower porous base plate (8), a lower part model box (2), a lower side wall (24), a geomembrane clamping plate (3) with a geomembrane, an upper part model box (4), an upper side wall (25), an upper porous base plate (9) and a cover plate (5); a lower porous base plate (8) is arranged on the bottom plate 1, and the length of the bottom plate (5) is longer than that of the lower porous base plate (8); the lower porous backing plate (8) is provided with a lower model box (2), the periphery of the lower model box is provided with a pad on the bottom plate (1), a lower side wall (24) with equal height, a geomembrane clamping plate (3) with a geomembrane (12) is arranged above the lower side wall (24), an upper model box (4) is arranged on the geomembrane clamping plate (3), an upper side wall (25) is arranged on the periphery of the upper model box (4), an upper porous backing plate (9) and a cover plate (5) are sequentially arranged above the upper side wall, a force sensor (10) is arranged in the center of the bottom of the upper porous base plate (9), the upper porous backing plate (9) is flush with the lower surface of the force sensor (10), the mechanical sensor (10) is connected with the data collector (11), a pipeline with a bidirectional valve (14) is arranged on the upper porous backing plate (9), and a measuring cylinder (15) is arranged below the other end of the pipeline; the lower model box (2) and the upper model box (4) are both hollow cylinders, hollow inner cavities are respectively a lower blocking material area (7) and an upper blocking material area (6), a pipeline (26) facing away from the lower blocking material area (7) is arranged on the bottom plate (1), and a pressure gauge (16), a lower two-way valve (17), a water tank (18), an air pressure control valve (19) and an air compressor (20) are sequentially arranged on the pipeline (26); the upper side wall (25), the geomembrane clamping plate (3), the lower side wall (24) and the bottom plate (1) are fixedly connected into a whole through bolts (13), the inner side end of the geomembrane clamping plate (3), the inner wall of the lower model box (2) and the inner wall of the upper model box (4) are flush, and the data collector (11) is located outside the upper blocking material area (6).
2. The model arrangement for testing geomembrane composite vertical barrier leakage according to claim 1, characterized in that said lower and upper model boxes (2, 4) are made of perspex, having an internal diameter of 0.25m and a height of 0.1 m.
3. The model device for testing the leakage of the geomembrane composite vertical barrier according to claim 1, wherein the material of the bottom plate (1), the geomembrane clamping plate (3), the cover plate (5), the lower porous backing plate (8), the upper porous backing plate (9) and the pipeline (26) is polytetrafluoroethylene.
4. The model apparatus for testing geomembrane composite vertical barrier leakage according to claim 1, wherein said lower perforated liner plate (8) and said upper perforated liner plate (9) have an opening ratio of 85% and the holes are communicated with each other by means of a trench.
5. The model device for testing the leakage of geomembrane composite vertical barriers according to claim 1, wherein a rubber packing (21) is provided between said cover plate (5) and the upper side wall (25).
6. The use method of the model device for testing the leakage of the geomembrane composite vertical barrier according to claim 1, characterized by comprising the following steps:
step 1, selecting a special plate (23), placing a lower model box (2) on the special plate (23), enclosing the lower model box (2) by a lower side wall (24), placing a heightening plate (22) above the lower side wall (24), and fixedly connecting the special plate (23), the lower side wall (24) and the heightening plate (22) by bolts (13);
step 2, filling a lower barrier material area (7) by controlling slump, and adding water for saturation after filling is finished;
step 3, placing a force sensor (10) on an upper porous backing plate (9), placing the force sensor on a filler of a lower barrier material area (7), then placing a cover plate (5), connecting the cover plate (5) with a pipeline with a bidirectional valve (14), and placing a measuring cylinder (15) below the other end of the pipeline;
step 4, opening the upper two-way valve (14), loading on the cover plate (5) by adopting a servo device, controlling loading force through the force sensor (10), solidifying the lower blocking material area (7) until solidification is finished, repeating the step 3 if water leakage occurs, and performing the step 5 if no water leakage occurs;
step 5, closing the upper two-way valve (14), stopping loading, removing the upper porous backing plate (9), the heightening plate (22), the cover plate (5), the force sensor (10), the data collector (11), the upper two-way valve (14) and the measuring cylinder (15), removing the lower blocking material area (7) higher than the lower model box (2), sequentially covering the upper porous backing plate (8) and the lower porous backing plate (1) and connecting the upper porous backing plate and the lower porous backing plate with the bottom plate (1) by using bolts (13);
step 6, turning over the model assembled in the step 5, removing the special plate (23), sequentially placing a geomembrane clamping plate (3) with a geomembrane (12) and an upper model box (4) on the lower side wall (24), surrounding the upper model box (4) by using the upper side wall 25, and fixedly connecting the upper side wall (25), the geomembrane clamping plate (3), the lower side wall (24) and the bottom plate (1) by using bolts (13), wherein the geomembrane rotates for 180 degrees and has the same shape as the special plate (23);
step 7, filling an upper barrier material area (6) by controlling slump, and adding water for saturation after filling is finished;
step 8, placing a force sensor (10) on an upper porous base plate (9), placing the force sensor on a filler of a lower barrier material area (7), placing an upper cover plate (5), connecting a pipeline with an upper two-way valve (14) on the cover plate (5), placing a measuring cylinder (15) below the other end of the pipeline, and connecting a lower porous base plate (8) with a pressure gauge (16), a lower two-way valve (17), a water tank (18), an air pressure control valve (19) and an air compressor (20) through pipelines;
step 9, opening an upper two-way valve (14), closing a lower two-way valve (17), loading on a cover plate (5) by adopting a servo device, controlling loading force through a force sensor (10), solidifying an upper blocking material area (6) until solidification is finished, repeating the step 8 if water leakage occurs, and performing the step 10 if no water seepage occurs;
step 10, opening a lower two-way valve (17), setting the water pressure in a water tank (18) filled with polluted liquid by adjusting a gas pressure control valve (19), performing a permeation test, and collecting the solution collected in a measuring cylinder (15);
step 11, respectively measuring the flow rate, the pollutant concentration, the conductivity and the pH value of the collected solution, and fitting data according to the formula (1) to obtain the hydrodynamic dispersion coefficient D and the retardation factor RdThe effective diffusion coefficient D is obtained from the formulae (2), (3) and (4)*；
D＝D*+DmdFormula (2)
D*＝τD0Formula (3)
Dmd＝αLv type (4)
In formula (2), c is the left-side contaminant concentration; c. C0Right pollutant concentration; v is the seepage velocity; t is time; rdIs the retardation coefficient; d is hydrodynamic dispersion coefficient; x is the calculated distance; dmdIs the mechanical dispersion coefficient; d*Is effective diffusion coefficient, tau is bending factor of soil pore space, αLIs the longitudinal dispersion.
7. The method of using the formwork apparatus for testing geomembrane composite vertical barrier leakage according to claim 6, wherein the height of the run-up plate (22) is greater than 10 cm.
8. The method for using the model device for testing the leakage of the geomembrane composite vertical barrier according to claim 6, wherein the filler in the step 2 and the step 7 is one of a soil-bentonite series vertical isolation material, a soil-cement-bentonite series vertical isolation material, a cement-bentonite series vertical isolation material or a magnesia-activated slag bentonite series vertical isolation material, or a composite structural material of a soil-bentonite series vertical isolation material, a soil-cement-bentonite series vertical isolation material, a cement-bentonite series vertical isolation material or a magnesia-activated slag bentonite series vertical isolation material sandwiching a sandy soil layer with a thickness of 1-2cm at a position parallel to the central axis, which is 0-10cm from the central axis.
9. Use of the model device for testing geomembrane composite vertical barrier leakage according to claim 1 for retarding contaminant migration.
10. Use according to claim 9, wherein the contaminant is a heavy metal contaminated liquid or an organic contaminated liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010402504.1A CN111595747B (en) | 2020-05-13 | 2020-05-13 | Model device for testing leakage of geomembrane composite vertical barrier and using method and application thereof |
Applications Claiming Priority (1)
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