CN108181149A - Preparation device and method of gas-containing soil - Google Patents
Preparation device and method of gas-containing soil Download PDFInfo
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- CN108181149A CN108181149A CN201810014580.8A CN201810014580A CN108181149A CN 108181149 A CN108181149 A CN 108181149A CN 201810014580 A CN201810014580 A CN 201810014580A CN 108181149 A CN108181149 A CN 108181149A
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- tube
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- 239000002689 soil Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title description 5
- 239000004677 Nylon Substances 0.000 claims abstract description 74
- 229920001778 nylon Polymers 0.000 claims abstract description 74
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims description 31
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 239000004575 stone Substances 0.000 claims description 18
- 229920001971 elastomer Polymers 0.000 claims description 12
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 10
- 229920006395 saturated elastomer Polymers 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000004927 clay Substances 0.000 claims description 6
- 238000002474 experimental method Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000010998 test method Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 238000011160 research Methods 0.000 description 3
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention belongs to the technical field of indoor geotechnical tests and relates to a preparation device and a preparation method of gas-containing soil.A nylon pipe interface is respectively arranged on the same side of a lower sample base and an upper sample base and is respectively connected with a fourth nylon pipe and a third nylon pipe through the nylon pipe interface; the fourth nylon pipe is connected with the first three-way valve through the first valve, the first nylon pipe is connected with the third nylon pipe and the second three-way valve respectively, the second three-way valve is connected with the first gas-liquid displacer pipeline after being communicated with the first three-way valve, the second nylon pipe is connected to the top of the sandy soil sample, the second nylon pipe is connected with the second gas-liquid displacer pipeline through the third valve, the preparation process of the gas-containing soil sample is simple, the operation is convenient, and the cost is saved.
Description
Technical field：
The invention belongs to laboratory soil test technical fields, are related to a kind of preparation facilities and method of gassiness soil.
Background technology：
South China Sea, the East Sea and land permafrost region contain a large amount of gas hydrates and (are commonly called as " combustible ice ") resource,
Gas hydrates are very sensitive to Temperature-pressure Conditions, and slight perturbations, which will decompose, generates a large amount of natural gases, and gas is with the bubble that dissociates
Formal distribution in hole, soil layer therefore develop into gassiness soil, mechanical property changes, especially with the rigidity of soil layer and intensity
It is reduced to very, the deterioration of character can cause the disaster accidents such as landslide, liquefaction, yielding of foundation, and serious peace is brought to ocean engineering
It is complete to threaten.
At present, less to the research of gassiness soil both at home and abroad, mechanical property Quality Research is rarely seen to be related to, and be limited to scene
The difficulty and defect of coring and experimental technique in situ are general to carry out gassiness soil energy soil mechanical properties using laboratory soil test
Research.It has a wide range of applications in three-axis tester soil test indoors, the preparation of existing gassiness soil sample is mostly by changing
Three-axis tester is made to realize, but the prior art has the following problems：First, equipment modification amount is big, generally require heater and
Thermostat, reaction kettle etc.；Second is that required test material is more, such as sodium bicarbonate, tetrahydrofuran, zeolite granular；Third, step
It is complicated；Fourth, it is high to operate level requirement to experimenter.Therefore, there is an urgent need to design a kind of novel gassiness soil preparation facilities and
Method.
Invention content：
It is an object of the invention to overcome shortcoming of the existing technology, seek the preparation dress that design provides a kind of gassiness soil
It puts and method, by being transformed to traditional triaxial test system, the quantitative control of gas with various content is realized, so as to prepare
Meet the gassiness soil sample of requirement of experiment.
To achieve these goals, the agent structure of gassiness soil preparation facilities of the present invention is replaced including the first gas-liquid
Device, heat-shrink tube, the first three-way valve, the first valve, the second valve, the second three-way valve, backpressure controllers interface, third valve
Door, the second gas-liquid displacer, the first nylon tube, geotechnical centrifuge model instrument pedestal, geotechnical centrifuge model instrument, axial displacement bracket,
Displacement sensor, pressure chamber base, the first confining pressure control unit interface, the second confining pressure control unit interface, balancing gate pit's pull rod, screw spiral shell
Under rotation, transmission rod, the second nylon tube, third nylon tube, the 4th nylon tube, sand sample, upper dankness stone, lower permeable stone, sample
Pedestal, sample upper bed-plate, balancing gate pit's footstock, O-ring slot, nylon interface tube, the first valve rubber, pottery clay plates and the second valve rubber；
The bottom of geotechnical centrifuge model instrument is equipped with soil test instrument pedestal, and geotechnical centrifuge model instrument side is equipped with the control of the second confining pressure
Device interface, the top of geotechnical centrifuge model instrument are equipped with axial displacement bracket, displacement sensor are equipped on axial displacement bracket,
Displacement sensor face pressure chamber base, pressure chamber base bottom are equipped with the first confining pressure control unit interface；Pressure chamber base
Crown center position is equipped with sample lower bottom base, and the top of sample lower bottom base is equipped with sample upper bed-plate, sample lower bottom base and sample
The same side of upper bed-plate is provided with nylon interface tube, and sample lower bottom base and sample upper bed-plate pass through nylon interface tube and the 4th respectively
Nylon tube is connected with third nylon tube, and the top of sample upper bed-plate is provided with O-ring slot, between sample upper bed-plate and sample lower bottom base
It seals to form core cavity using the first valve rubber and the second valve rubber, pottery clay plates is installed in core cavity；It is installed at the top of sample upper bed-plate
There is lower permeable stone, sand sample is housed at the top of lower permeable stone, upper dankness stone is installed, upper dankness stone top is certainly at the top of sand sample
Transmission rod and balancing gate pit's footstock are sequentially installed on down, balancing gate pit's footstock is connect by balancing gate pit's pull rod with pressure chamber base,
Screw spiral is installed at the top of balancing gate pit's footstock；4th nylon tube is connect by the first valve with the first three-way valve, third Buddhist nun
Dragon pipe is connect by the second valve with one end of the first nylon tube, and the other end of the first nylon tube is connect with the second three-way valve,
Backpressure controllers interface is connected on second three-way valve, the second three-way valve is put after being connected with the first three-way valve with the first gas-liquid
Parallel operation pipeline connects, and the pipeline between the first gas-liquid displacer and the first three-way valve is tightly connected using heat-shrink tube；Sand tries
The second nylon tube is connected at the top of sample, the second nylon tube is connect by third valve with the second gas-liquid displacer pipeline, third valve
Pipeline between door and the second gas-liquid displacer is tightly connected using heat-shrink tube.
The present invention connects the pipeline of third valve and the second gas-liquid displacer, connect the first gas-liquid displacer and the first threeway
The pipeline of valve is the high-pressure hose of φ 3mm or nylon tube high-pressure hose, and the pressure-resistant limit is more than the water inside sand sample
Pressure.
The present invention can prepare saturated sample and gassiness soil sample, specific preparation process using the gassiness soil preparation facilities
For：
(1) saturated sample is prepared：Backpressure controllers interface, the first nylon tube, the second valve, third nylon tube are connected successively
It connects, uses《Standard for test methods of earthworks GBT50123-1999》Saturated sample is prepared, screws screw spiral and pressure chamber base
It is completely embedded and water filling keeps 5-30kPa confining pressures to make sand sample upright, concrete numerical value is depending on the upright situation of sand sample；It is logical
It crosses and external backpressure controllers and confining pressure controller is set to carry out initial saturation, until the pore pressure parameter B of sand sample >=
When 0.90, sample saturation degree is further improved by back-pressure saturation, until B >=0.98, prepared by saturated sand sample completes；To preparing
Saturated sand sample when being tested, by control valve, by backpressure controllers interface, the second three-way valve, the first nylon
Pipe and third nylon tube are sequentially connected, and carry out experiment；
(2) gassiness soil sample is prepared：It closes the second valve, opens third valve and the first valve, by the first three-way valve
Steering is connected with the first gas-liquid displacer, slowly promotes the second gas-liquid displacer, makes nitrogen in the second gas-liquid displacer successively
Entered inside sand sample by heat-shrink tube, third valve, the second nylon tube, can be discharged simultaneously inside sand sample isometric
Water, the water of discharge enter the first gas-liquid displacer by the 4th nylon tube, the first valve, the first three-way valve, heat-shrink tube, complete
The gassiness soil sample of preparation is carried out soil test by the preparation of gassiness soil sample according to preset stress path.
Compared with prior art, the present invention using the assembly type specimen mount of repacking, it is aided with pipeline connection and valve control,
The preparation section for making gassiness soil sample is simple, easy to operate, cost-effective, just can quickly prepare and contain using only less material
Gas soil sample can prepare saturated sample and gassiness soil sample simultaneously.
Description of the drawings：
Fig. 1 is the agent structure principle schematic of gassiness soil preparation facilities of the present invention.
Fig. 2 is the cross-sectional view of sample upper bed-plate of the present invention and sample lower bottom base.
Fig. 3 is sample upper bed-plate of the present invention and sample lower bottom base fractionation structural representation.
Specific embodiment：
The invention will be further described by way of example and in conjunction with the accompanying drawings.
Embodiment：
The agent structure of gassiness soil preparation facilities described in the present embodiment includes the first gas-liquid displacer 1, heat-shrink tube 2, first
Three-way valve 3, the first valve 4, the second valve 5, the second three-way valve 6, backpressure controllers interface 7, third valve 8, the second gas
Liquid displacer 9, the first nylon tube 10, geotechnical centrifuge model instrument pedestal 11, geotechnical centrifuge model instrument 12, axial displacement bracket 13,
Displacement sensor 14, pressure chamber base 15, the first confining pressure control unit interface 16, the second confining pressure control unit interface 17, balancing gate pit are drawn
Bar 18, screw spiral 19, transmission rod 20, the second nylon tube 21, third nylon tube 22, the 4th nylon tube 23, sand sample 24, on
Permeable stone 25, lower permeable stone 26, sample lower bottom base 27, sample upper bed-plate 28, balancing gate pit's footstock 29, O-ring slot 30, nylon tube connect
The 31, first valve rubber 32 of mouth, 33 and second valve rubber 34 of pottery clay plates；The bottom of geotechnical centrifuge model instrument 12 is equipped with soil test
Instrument pedestal 11,12 side of geotechnical centrifuge model instrument are equipped with the second confining pressure control unit interface 17, geotechnical centrifuge model instrument 12 it is upper
Portion is equipped with axial displacement bracket 13, and displacement sensor 14,14 face pressure of displacement sensor are equipped on axial displacement bracket 13
Power room pedestal 15,15 bottom of pressure chamber base are equipped with the first confining pressure control unit interface 16；The crown center of pressure chamber base 15
Position is equipped with sample lower bottom base 27, and the top of sample lower bottom base 27 is equipped with sample upper bed-plate 28, sample lower bottom base 27 and sample
The same side of upper bed-plate 28 is provided with nylon interface tube 31, and sample lower bottom base 27 and sample upper bed-plate 28 are connect respectively by nylon tube
Mouthfuls 31 connect with the 4th nylon tube 23 and third nylon tube 22, and the top of sample upper bed-plate 28 is provided with O-ring slot 30, bottom on sample
Core cavity is formed using the first valve rubber 32 and the sealing of the second valve rubber 34 between seat 28 and sample lower bottom base 27, is equipped in core cavity
Pottery clay plates 33；28 top of sample upper bed-plate is equipped with lower permeable stone 26, and lower 26 top of permeable stone is equipped with sand sample 24, sand examination
24 top of sample is equipped with upper dankness stone 25, and 25 top of upper dankness stone is sequentially installed with transmission rod 20 and balancing gate pit's footstock from bottom to top
29, balancing gate pit's footstock 29 is connect by balancing gate pit's pull rod 18 with pressure chamber base 15, and footstock 29 top in balancing gate pit's is equipped with screw
Spiral 19；4th nylon tube 23 is connect by the first valve 4 with the first three-way valve 3, and third nylon tube 22 passes through the second valve 5
It is connect with one end of the first nylon tube 10, the other end of the first nylon tube 10 is connect with the second three-way valve 6, the second three-way valve
Backpressure controllers interface 7 is connected on 6, the second three-way valve 6 is managed after being connected with the first three-way valve 3 with the first gas-liquid displacer 1
Road connects, and the pipeline between the first gas-liquid displacer 1 and the first three-way valve 3 is tightly connected using heat-shrink tube 2；Sand sample 24
Top be connected to the second nylon tube 21, the second nylon tube 2 is connect by third valve 8 with 9 pipeline of the second gas-liquid displacer, third
Pipeline between 8 and second gas-liquid displacer 9 of valve is tightly connected using heat-shrink tube 2.
The pipeline of the present embodiment connecting valve and gas-liquid displacer is the high-pressure hose of φ 3mm or nylon tube high-pressure hose,
The limit that it is pressure-resistant is more than the hydraulic pressure inside sand sample 24.
The present embodiment can prepare saturated sample and gassiness soil sample using the gassiness soil preparation facilities, specifically prepare
Cheng Wei：
(1) saturated sample is prepared：By backpressure controllers interface 7, the first nylon tube 10, the second valve 5, third nylon tube 22
It is sequentially connected, uses《Standard for test methods of earthworks GBT50123-1999》Saturated sample is prepared, screws screw spiral 19 and pressure
Power room pedestal 15 is completely embedded and water filling keeps 5-30kPa confining pressures to make sand sample 24 upright, and concrete numerical value regards sand sample 24
Depending on upright situation；By the way that external backpressure controllers and confining pressure controller is set to carry out initial saturation, until sand sample 24
During pore pressure parameter B >=0.90, sample saturation degree is further improved by back-pressure saturation, until B >=0.98, saturated sand examination
Prepared by sample completes；When testing the saturated sand sample of preparation, by control valve, by backpressure controllers interface 7, second
Three-way valve 6, the first nylon tube 10 and third nylon tube 22 are sequentially connected, and carry out experiment；
(2) gassiness soil sample is prepared：It closes the second valve 5, opens third valve 8 and the first valve 4, by the first triple valve
Door 3 is turned to be connected with the first gas-liquid displacer 1, slowly promotes the second gas-liquid displacer 9, makes the nitrogen in the second gas-liquid displacer
It passes sequentially through heat-shrink tube 2, third valve 8, the second nylon tube 21 to enter inside sand sample 24, the 24 inside meeting simultaneously of sand sample
Discharge isometric water, the water of discharge enters the by the 4th nylon tube 23, the first valve 4, the first three-way valve 3, heat-shrink tube 2
One gas-liquid displacer 1, complete gassiness soil sample preparation, by the gassiness soil sample of preparation according to preset stress path into
Row soil test.
Claims (3)
1. a kind of preparation facilities of gassiness soil, it is characterised in that agent structure includes the first gas-liquid displacer, heat-shrink tube, the one or three
Port valve door, the first valve, the second valve, the second three-way valve, backpressure controllers interface, third valve, the second gas-liquid displacer,
First nylon tube, geotechnical centrifuge model instrument pedestal, geotechnical centrifuge model instrument, axial displacement bracket, displacement sensor, balancing gate pit bottom
Seat, the first confining pressure control unit interface, the second confining pressure control unit interface, balancing gate pit's pull rod, screw spiral, transmission rod, the second nylon
Pipe, third nylon tube, the 4th nylon tube, sand sample, upper dankness stone, lower permeable stone, sample lower bottom base, sample upper bed-plate, pressure
Power ceiling seat, O-ring slot, nylon interface tube, the first valve rubber, pottery clay plates and the second valve rubber；The bottom of geotechnical centrifuge model instrument
Portion is equipped with soil test instrument pedestal, and geotechnical centrifuge model instrument side is equipped with the second confining pressure control unit interface, geotechnological three axis examination
The top for testing instrument is equipped with axial displacement bracket, and displacement sensor, displacement sensor face pressure are equipped on axial displacement bracket
Power room pedestal, pressure chamber base bottom are equipped with the first confining pressure control unit interface；The crown center position installation of pressure chamber base
There is a sample lower bottom base, the top of sample lower bottom base is equipped with sample upper bed-plate, and the same side of sample lower bottom base and sample upper bed-plate is equal
Nylon interface tube is provided with, sample lower bottom base and sample upper bed-plate pass through nylon interface tube and the 4th nylon tube and third nylon respectively
Pipe connects, and the top of sample upper bed-plate is provided with O-ring slot, between sample upper bed-plate and sample lower bottom base using the first valve rubber and
Second valve rubber seals to form core cavity, and pottery clay plates are equipped in core cavity；Lower permeable stone is installed at the top of sample upper bed-plate, under it is permeable
Upper dankness stone is installed equipped with sand sample, sand sample top at the top of stone, upper dankness stone top is sequentially installed with from bottom to top
Transmission rod and balancing gate pit's footstock, balancing gate pit's footstock are connect by balancing gate pit's pull rod with pressure chamber base, are pacified at the top of balancing gate pit's footstock
Equipped with screw spiral；4th nylon tube is connect by the first valve with the first three-way valve, and third nylon tube passes through the second valve
It is connect with one end of the first nylon tube, the other end of the first nylon tube is connect with the second three-way valve, is connect on the second three-way valve
There are backpressure controllers interface, the second three-way valve to be connect after being connected with the first three-way valve with the first gas-liquid displacer pipeline, the
Pipeline between one gas-liquid displacer and the first three-way valve is tightly connected using heat-shrink tube；Second is connected at the top of sand sample
Nylon tube, the second nylon tube are connect by third valve with the second gas-liquid displacer pipeline, and third valve and the second gas-liquid are replaced
Pipeline between device is tightly connected using heat-shrink tube.
2. the preparation facilities of gassiness soil according to claim 1, it is characterised in that the connection third valve and the second gas-liquid
The pipeline of the pipeline of displacer, the first gas-liquid displacer of connection and the first three-way valve is the high-pressure hose or nylon of φ 3mm
Pipe high-pressure hose, the pressure-resistant limit are more than the hydraulic pressure inside sand sample.
3. a kind of application of the preparation facilities of gassiness soil as claimed in claim 2, it is characterised in that can be prepared using the device
Saturated sample and gassiness soil sample, specific preparation process are：
(1) saturated sample is prepared：Backpressure controllers interface, the first nylon tube, the second valve, third nylon tube are sequentially connected,
Using《Standard for test methods of earthworks GBT50123-1999》Saturated sample is prepared, screw spiral is screwed and is connect with pressure chamber base
Close and water filling keeps 5-30kPa confining pressures to make sand sample upright, and concrete numerical value is depending on the upright situation of sand sample；By setting
It puts external backpressure controllers and confining pressure controller carries out initial saturation, until pore pressure parameter B >=0.90 of sand sample
When, sample saturation degree is further improved by back-pressure saturation, until B >=0.98, prepared by saturated sand sample completes；Satisfy to preparation
When being tested with sand sample, by control valve, by backpressure controllers interface, the second three-way valve, the first nylon tube and
Third nylon tube is sequentially connected, and carries out experiment；
(2) gassiness soil sample is prepared：The second valve is closed, third valve and the first valve is opened, turns to the first three-way valve
It is connected with the first gas-liquid displacer, slowly promotes the second gas-liquid displacer, passes sequentially through the nitrogen in the second gas-liquid displacer
Heat-shrink tube, third valve, the second nylon tube enter inside sand sample, and isometric water can be discharged simultaneously inside sand sample,
The water of discharge enters the first gas-liquid displacer by the 4th nylon tube, the first valve, the first three-way valve, heat-shrink tube, completes to contain
The gassiness soil sample of preparation is carried out soil test by the preparation of gas soil sample according to preset stress path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014580.8A CN108181149B (en) | 2018-01-08 | 2018-01-08 | Preparation device and method of gas-containing soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014580.8A CN108181149B (en) | 2018-01-08 | 2018-01-08 | Preparation device and method of gas-containing soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108181149A true CN108181149A (en) | 2018-06-19 |
| CN108181149B CN108181149B (en) | 2020-11-06 |
Family
ID=62550033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810014580.8A Expired - Fee Related CN108181149B (en) | 2018-01-08 | 2018-01-08 | Preparation device and method of gas-containing soil |
Country Status (1)
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| CN (1) | CN108181149B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337337A (en) * | 2020-03-20 | 2020-06-26 | 中国科学院武汉岩土力学研究所 | Variable-density gas-containing soil sample preparation device and method based on zeolite displacement reaction |
| CN111474022A (en) * | 2020-03-20 | 2020-07-31 | 中国科学院武汉岩土力学研究所 | Sample preparation device and method capable of quantitatively preparing gas-containing soil samples with different densities |
| CN115126009A (en) * | 2022-06-10 | 2022-09-30 | 河海大学 | Device for reducing relative compactness of saturated sandy soil field and construction method |
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