CN109085039B - Device and method for preparing soil sample for ground penetrating radar polluted soil detection simulation test - Google Patents
Device and method for preparing soil sample for ground penetrating radar polluted soil detection simulation test Download PDFInfo
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- CN109085039B CN109085039B CN201811098170.2A CN201811098170A CN109085039B CN 109085039 B CN109085039 B CN 109085039B CN 201811098170 A CN201811098170 A CN 201811098170A CN 109085039 B CN109085039 B CN 109085039B
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- 239000002689 soil Substances 0.000 title claims abstract description 72
- 230000000149 penetrating effect Effects 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000004088 simulation Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 14
- 230000002265 prevention Effects 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000003900 soil pollution Methods 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 208000003643 Callosities Diseases 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005464 sample preparation method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A control system of an electrohydraulic servo press of the device is connected with a loading cylinder, the loading cylinder is connected with a loading platform, a vertical force transfer component is arranged below a counterforce device, a U-shaped long side plate and a short side plate of an easy-demolding assembly type die are assembled and connected through bolts, side expansion prevention ribs are in a grid shape and are welded on the outer side of the U-shaped long side plate in parallel, a vertical force transfer component is arranged on a top plate, and a bottom plate is arranged on the loading platform; the grille is placed in the easy-to-demould split mold, and the vertical force transmission component is placed on the appointed position of the top plate surface. The invention can realize the preparation of uniform contaminated soil samples with different pollution degrees, different compactness and different water contents, and meets the requirements of the ground penetrating radar method contaminated soil detection simulation test.
Description
Technical Field
The invention relates to the field of detection of soil polluted by a ground penetrating radar method, in particular to a device and a method for preparing a soil sample for a ground penetrating radar polluted soil detection simulation test.
Background
In recent years, chinese economy is developed at a high speed, but with various activities of human beings, harmful substances are continuously introduced into soil, and soil pollution is increasingly serious. If crops such as vegetables, corns, paddy rice and the like are planted on the polluted land, the crops can cause great harm to human health. Therefore, extensive soil pollution detection and remediation work must be constantly performed.
At present, a chemical detection method is generally adopted for soil pollution detection, the method has high cost and time-consuming detection process, the collected sample only represents the condition of the nearby area, and when the polluted area is too large or the sampling environment of the polluted area is complex, the collection of the sample becomes very difficult. Ground Penetrating Radar (GPR) is a geophysical method for detecting the attribute and distribution of an underground medium by using electromagnetic waves, is convenient to carry and operate, has a fast detection process, is very suitable for large-scale underground exploration work, and has been widely focused in the aspect of polluted soil detection in recent years.
Because the pollutants can change the electrical parameters of the underground soil medium, the change of the electrical parameters can lead to the change of the reflected wave characteristics of the ground penetrating radar, which is the theoretical basis for detecting the polluted soil by using the ground penetrating radar. To achieve qualitative and quantitative detection of the degree of pollution, a large number of simulation tests must be performed to build a model of the relationship between the contaminated soil and the ground penetrating radar signals. The simulation test should include test soil samples of different pollution levels, different compactibility and different water contents, and the test soil sample size should satisfy the separation of the reflected wave and the direct wave of the ground penetrating radar and be not affected by boundary reflection. However, no related test device capable of meeting the simulation test soil sample of the ground penetrating radar polluted soil detection exists at present.
Disclosure of Invention
Aiming at the defects, the invention provides a device and a method for preparing a soil sample for a ground penetrating radar contaminated soil detection simulation test, which can prepare large-volume contaminated soil samples with different pollution degrees, different compactness and different water contents.
The technical scheme adopted by the invention is as follows: the utility model provides a device of preparation ground penetrating radar contaminated soil detects analogue test soil sample, includes electrohydraulic servo press, easy drawing of patterns pin-connected panel mould, grid and vertical biography power component, and concrete structure and relation of connection are:
the electrohydraulic servo press comprises a control system, a loading platform, a loading oil cylinder and a counterforce device, wherein the control system is connected with the loading oil cylinder, the loading oil cylinder is connected with the loading platform, a vertical force transmission component is arranged below the counterforce device,
the easy-to-demold assembled die comprises a top plate, a bottom plate, a U-shaped long side plate, a short side plate, side expansion prevention ribs, bolts and handles, wherein the U-shaped long side plate and the short side plate are assembled and connected through the bolts, the side expansion prevention ribs are in a grid shape and are welded on the outer side of the U-shaped long side plate in parallel, a vertical force transmission component is placed on the top plate, the bottom plate is placed on a loading platform, the grid is placed in the easy-to-demold assembled die, the vertical force transmission component consists of a plurality of equal-height rigid test blocks, and the vertical force transmission component is placed on an appointed position on the surface of the top plate;
the grids are formed by arranging smooth hard thin plates in parallel at equal intervals to form a plurality of units with equal volumes, and the heights of the grids are consistent with those of the easy-to-demould assembled die;
a handle is arranged on the top plate;
the top plate, the bottom plate, the U-shaped long side plates and the short side plates are all made of stainless steel with the thickness of 2 cm;
the vertical force transfer component consists of at least 4 equal-height rigid test blocks;
and each side of the bolts is at least 4 through the bolt assembly connection of the long side plate and the short side plate.
The device and the method for preparing the soil sample for the ground penetrating radar polluted soil detection simulation test comprise the following steps:
(1) Preparing polluted soil with different pollution degrees and different water contents according to the purpose of a ground penetrating radar method polluted soil detection simulation test;
(2) Assembling an easy-demolding assembled mold on a loading platform of an electrohydraulic servo press, putting grids, putting the same amount of prepared polluted soil into each grid equal volume unit, wherein the weight of the put polluted soil is calculated according to the soil sample height and compactness required by a test;
(3) Pulling out the grille, installing a top plate of the easy-to-demould split mold, and placing a test block with equal high rigidity on a designated position on the surface of the top plate;
(4) Starting an electrohydraulic servo press, moving a loading platform to a designated position, setting a displacement value of a loading oil cylinder, loading in a displacement control mode, and maintaining the time for at least 30 seconds after loading to the set displacement;
(5) Unloading the electrohydraulic servo press, lifting the easy-to-demold assembled die and the prepared sample to a simulation test position, and dismantling the easy-to-demold assembled die.
The invention has the outstanding advantages that:
1. the displacement control loading mode of the electrohydraulic servo press can accurately control the height of the compressed polluted soil sample;
2. the easy-to-demold assembled die has enough rigidity, so that the deformation of the side plate is extremely small in the soil sample loading and compressing process;
3. the grid equally divides the polluted soil to be compressed in the easy-demolding spliced mold, ensures that the compactness of each position of the finally prepared soil sample is uniform, realizes the preparation of large-volume test soil samples with different pollution degrees, compactness and water contents, and meets the requirement of uniformity;
4. the size of the large-volume test soil sample prepared by the soil sample preparation device can meet the separation of the reflected wave and the direct wave of the ground penetrating radar and is not influenced by boundary reflection, and meanwhile, the device has the characteristics of simple structure, convenience in operation and high control precision.
Drawings
Fig. 1 is a schematic structural diagram of a device for preparing a soil sample for a simulation test of detecting soil polluted by a ground penetrating radar.
FIG. 2 is a schematic diagram of an electrohydraulic servo press for preparing a soil sample for a simulation test of the detection of the polluted soil by the ground penetrating radar.
Fig. 3 is a schematic diagram of an easily-demoulded split mold of the device for preparing a soil sample for a simulation test of detecting soil polluted by a ground penetrating radar.
FIG. 4 is a schematic diagram of a grating of the device for preparing a soil sample for a simulation test of the detection of contaminated soil by a ground penetrating radar according to the present invention.
Fig. 5 is a schematic view of a vertical force transmission member of the device for preparing a soil sample for a simulation test of the detection of polluted soil by a ground penetrating radar.
Marked in the figure as: the reaction force device 1, the control system 2, the loading cylinder 3, the loading platform 4, the bottom plate 5, the U-shaped long side plate 6, the side expansion prevention ribs 7, the bolts 8, the short side plate 9, the top plate 10, the equal-height rigidity test block 11, the handle 12, the short smooth hard thin plate 13 and the long smooth hard thin plate 14.
Detailed Description
The technical scheme of the present invention is further described in detail below with reference to the accompanying drawings and examples, but is not limited thereto.
As shown in figures 1 to 5, the device for preparing the soil sample for the simulation test of the soil detection of the ground penetrating radar provided by the invention comprises an electrohydraulic servo press, an easy-to-demold assembly type die, a grid and a vertical force transmission component. The specific structure and the connection relation are as follows:
the electro-hydraulic servo press comprises a counterforce device 1, a control system 2, a loading oil cylinder 3, a loading platform 4 and a control system 2, wherein the control system 2 is connected with the loading oil cylinder 3, the loading oil cylinder 3 is connected with the loading platform 4, and the counterforce device 1 is positioned above a vertical force transmission component;
the easy-demolding assembled die comprises a bottom plate 5, a U-shaped long side plate 6, side expansion prevention ribs 7, bolts 8, a short side plate 9, a top plate 10 and a handle 12, wherein the U-shaped long side plate 6 and the short side plate 9 are assembled and connected through the bolts 8, the long sides of the side expansion prevention ribs 7 are welded on the outer sides of the U-shaped long side plate 6 in parallel, vertical force transmission components are arranged on the top plate 10, the handle 12 is arranged on the top plate 10, and the bottom plate 5 is arranged on the loading platform 4;
the grid comprises a short smooth hard thin plate 13 and a long smooth hard thin plate 14, and is placed in an easy-to-demould split mold;
the vertical force transfer component comprises 4 equal-height rigid test blocks 11, and the equal-height rigid test blocks 11 are placed on the appointed position of the surface of the top plate 10;
the model of the electrohydraulic servo press is YAW-10000J type hydraulic press;
the easy-to-demold assembled die is in a cuboid shape, and the side expansion prevention ribs 7 are in a grid shape;
the bottom plate 5, the U-shaped long side plate 6, the short side plate 9 and the top plate 10 of the easy-demolding assembly type mold are all made of stainless steel with the thickness of 2 cm;
the length, width and thickness of the bottom plate 5 are 1000mm multiplied by 500mm multiplied by 20mm;
the U-shaped long side plate 6 is formed by combining 1 web plate and 2 wing plates, wherein the length, the width and the thickness of the web plate are 960mm multiplied by 300mm multiplied by 20mm, and the length, the width and the thickness of the wing plates are 300mm multiplied by 120mm multiplied by 20mm;
the side expansion prevention ribs 7 are in a grid shape, are welded on the outer side of the U-shaped long side plate in parallel, the grids are rectangular, the inner side of each grid is 225mm multiplied by 40mm, the number of the grids is 8, and the thickness of the side expansion prevention ribs 7 is 20mm;
the length, width and thickness of the short side plates 9 are 700mm multiplied by 300mm multiplied by 20mm;
the top plate 10 has a length, width and thickness of 1000mm by 500mm by 20mm,
the U-shaped long side plate 6 is spliced and connected with the short side plate 9 through bolts 8, the diameter of each bolt is 20mm, the model is M20, and the number of bolts at each connecting edge is 4;
as shown in fig. 4, the grid 3 is formed by arranging 3 short smooth hard sheets 13 and 1 long smooth hard sheet 14 to form 8 equal volume units; the short smooth hard sheet 13 has a length, width and thickness of 500mm×300mm×2mm; the long smooth hard sheet 14 has a length, width and thickness of 1000mm×300mm×2mm;
as shown in fig. 5, the vertical force transfer component is composed of 4 equal-height rigid test blocks 11, the equal-height rigid test blocks 11 are i-shaped, the length, width and height of a web plate are 60mm×40mm×150mm, the length, width and height of wing plates at two sides are 200mm×30mm×150mm, and the material is cast iron;
the invention relates to a test soil sample preparation method for a device for preparing a ground penetrating radar polluted soil detection simulation test soil sample, which comprises the following steps:
(1) Preparing polluted soil with different pollution degrees and different water contents according to the purpose of a ground penetrating radar method polluted soil detection simulation test;
(2) Assembling an easy-demolding assembled mold on a loading platform 4 of an electrohydraulic servo press, putting grids, putting the same amount of prepared polluted soil into each grid equal volume unit, wherein the weight of the put polluted soil is calculated according to the soil sample height and compactness required by a test;
(3) Pulling out the grille, installing a top plate 10 of the easy-to-demould split mold, and placing a test block 11 with equal high rigidity on a designated position on the surface of the top plate;
(4) Starting an electrohydraulic servo press, moving a loading platform 4 to a designated position, setting a displacement value of a loading cylinder 3, loading in a displacement control mode, and maintaining the time for at least 30 seconds after loading to the set displacement;
(5) Unloading the electrohydraulic servo press, lifting the easy-to-demold assembled die and the prepared sample to a simulation test position, and dismantling the easy-to-demold assembled die.
Claims (4)
1. The preparation method of the soil sample for the ground penetrating radar polluted soil detection simulation test is characterized by comprising the following steps:
(1) Preparing polluted soil with different pollution degrees and different water contents according to the purpose of a ground penetrating radar method polluted soil detection simulation test;
(2) Assembling an easy-demolding assembled mold on a loading platform of an electrohydraulic servo press, putting grids, putting the same amount of prepared polluted soil into each grid equal volume unit, wherein the weight of the put polluted soil is calculated according to the soil sample height and compactness required by a test;
(3) Pulling out the grille, installing a top plate of the easy-to-demould split mold, and placing a test block with equal high rigidity on a designated position on the surface of the top plate;
(4) Starting an electrohydraulic servo press, moving a loading platform to a designated position, setting a displacement value of a loading oil cylinder, loading in a displacement control mode, and maintaining the time for at least 30 seconds after loading to the set displacement;
(5) Unloading the electrohydraulic servo press, lifting the easy-to-demold assembled die and the prepared sample to a simulation test position, and dismantling the easy-to-demold assembled die;
the device adopted by the preparation method of the soil sample for the ground penetrating radar polluted soil detection simulation test comprises an electrohydraulic servo press, an easy-to-demold assembled die, a grid and a vertical force transmission component,
the electrohydraulic servo press comprises a control system, a loading platform, a loading oil cylinder and a counterforce device, wherein the control system is connected with the loading oil cylinder, the loading oil cylinder is connected with the loading platform, a vertical force transmission component is arranged below the counterforce device,
the easy-to-demold assembled die comprises a top plate, a bottom plate, a U-shaped long side plate, a short side plate, side expansion prevention ribs, bolts and handles, wherein the U-shaped long side plate and the short side plate are assembled and connected through the bolts, the side expansion prevention ribs are in a grid shape and are welded on the outer side of the U-shaped long side plate in parallel, a vertical force transmission component is placed on the top plate, the bottom plate is placed on a loading platform, the grid is placed in the easy-to-demold assembled die, the vertical force transmission component consists of a plurality of equal-height rigid test blocks, and the vertical force transmission component is placed on an appointed position on the surface of the top plate;
the bottom plate, the U-shaped long side plate, the short side plate and the top plate of the easy-demolding assembly type mold are all made of stainless steel with the thickness of 2 cm;
the length, width and thickness of the bottom plate are 1000mm multiplied by 500mm multiplied by 20mm;
the U-shaped long side plate is formed by combining 1 web plate and 2 wing plates, wherein the length, width and thickness of the web plate are 960mm multiplied by 300mm multiplied by 20mm, and the length, width and thickness of the wing plates are 300mm multiplied by 120mm multiplied by 20mm;
the side expansion-preventing ribs are in a grid shape, are welded on the outer side of the U-shaped long side plate in parallel, the grids are rectangular, the inner side of each grid is 225mm multiplied by 40mm, the number of the grids is 8, and the thickness of each side expansion-preventing rib is 20mm;
the length, width and thickness of the short side plates are 700mm multiplied by 300mm multiplied by 20mm;
the length, width and thickness of the top plate are 1000mm multiplied by 500mm multiplied by 20mm,
the grid is formed by arranging 3 short smooth hard thin plates and 1 long smooth hard thin plate to form 8 equal volume units; the length, width and thickness of the short smooth hard thin plate are 500mm multiplied by 300mm multiplied by 2mm; the length, width and thickness of the long smooth hard thin plate are 1000mm multiplied by 300mm multiplied by 2mm;
the vertical force transfer component is composed of equal-height rigid test blocks, the equal-height rigid test blocks are I-shaped, the length, width and height of web plates are 60mm multiplied by 40mm multiplied by 150mm, and the length, width and height of wing plates at two sides are 200mm multiplied by 30mm multiplied by 150mm.
2. The method for preparing the soil sample for the ground penetrating radar polluted soil detection simulation test according to claim 1, wherein the grids are formed by arranging smooth hard thin plates in parallel at equal intervals to form a plurality of equal volume units, and the heights of the grids are consistent with those of the easily-demoulded split type die.
3. The method for preparing a soil sample for a simulation test of detecting contaminated soil by a ground penetrating radar according to claim 1, wherein a handle is provided on the top plate.
4. The method for preparing the soil sample for the simulation test of the detection of the polluted soil by the ground penetrating radar according to claim 1, wherein at least 4 bolts are assembled on each side of the U-shaped long side plate and the short side plate through bolts.
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| CN109085039B true CN109085039B (en) | 2024-04-09 |
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