CN107144514B - Device for radial penetration experiment of cylindrical hollow soil sample and using method - Google Patents
Device for radial penetration experiment of cylindrical hollow soil sample and using method Download PDFInfo
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- CN107144514B CN107144514B CN201710517344.3A CN201710517344A CN107144514B CN 107144514 B CN107144514 B CN 107144514B CN 201710517344 A CN201710517344 A CN 201710517344A CN 107144514 B CN107144514 B CN 107144514B
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- 239000002689 soil Substances 0.000 title claims abstract description 57
- 230000035515 penetration Effects 0.000 title claims abstract description 20
- 238000002474 experimental method Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 239000004575 stone Substances 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 230000008595 infiltration Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000005341 toughened glass Substances 0.000 claims description 3
- 230000035699 permeability Effects 0.000 abstract description 12
- 239000012466 permeate Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a device for a radial penetration experiment of a cylindrical hollow soil sample and a using method thereof. The water inlet chamber is positioned in the cylindrical water permeable net. A cylindrical hollow soil sample is placed between the cylindrical water permeable net and the cylindrical shell, and an annular water permeable stone is arranged between the soil sample and the cylindrical shell; the bottom of the columnar shell is provided with a water outlet channel, the bottom end of the annular permeable stone is communicated with the water outlet channel, and the water outlet channel is communicated with the water outlet. The problem that no targeted test equipment in the prior art tests the permeability and water stability of the soil body under the condition of radial seepage is solved, and the evolution law of the permeability of the soil body under the condition of radial seepage can be reflected more truly.
Description
Technical Field
The invention belongs to the field of water and soil conservation and soil mechanics, and particularly relates to a device for a radial penetration experiment of a cylindrical hollow soil sample and a using method of the device.
Background
The permeability of the soil is one of the basic engineering characteristics of the soil, and is one of indexes which must be measured in actual engineering and soil test research, the permeability of the soil relates to the stability of the soil under the seepage action, the water and soil loss in loess areas is serious, and the permeability and the water stability of the soil are closely related.
The permeability of the soil sample has vertical, horizontal and radial permeability modes, and longitudinal and horizontal permeability test methods and equipment are relatively mature, but the prior tests on the permeability and water stability of the soil under the radial seepage condition are not mature, have no more targeted test methods and test equipment, and have poor test controllability.
Therefore, how to design a device capable of truly reflecting the evolution law of the permeability of the soil body under the condition of radial seepage is a technical problem to be solved.
Disclosure of Invention
The invention aims to provide a device for a radial penetration test of a cylindrical hollow soil sample and a using method thereof, and solves the problem that no more specific test equipment is available in the prior art for testing the permeability and water stability of a soil body under the radial seepage condition. The invention can truly reflect the evolution law of the permeability of the soil body under the condition of radial seepage.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a device for a radial penetration experiment of a cylindrical hollow soil sample, which comprises a cylindrical shell, wherein the top of the cylindrical shell is provided with a top cover, the middle part of the top cover is provided with a through hole, a water inlet chamber capable of moving up and down along the through hole is arranged in the through hole, and the upper part of the water inlet chamber is communicated with a water inlet.
The water inlet device is characterized by further comprising a cylindrical water permeable net, the upper end of the cylindrical water permeable net is in contact with or connected with the inner wall of the top cover, the lower end of the cylindrical water permeable net is connected with the inner wall of the bottom of the cylindrical shell, and the water inlet chamber is located in the cylindrical water permeable net.
A cylindrical hollow soil sample is placed between the cylindrical water permeable net and the cylindrical shell, and an annular water permeable stone is arranged between the cylindrical hollow soil sample and the cylindrical shell; the bottom of the columnar shell is provided with a water outlet channel, the bottom end of the annular permeable stone is communicated with the water outlet channel, and the water outlet channel is communicated with the water outlet.
Furthermore, the invention is characterized in that:
the upper part of the pressurizing clamp is connected with the upper part of the top cover, the lower part of the pressurizing clamp is connected with the lower part of the columnar shell, and a screwing screw is arranged between the upper part of the pressurizing clamp and the top cover.
A rubber gasket is arranged between the water inlet chamber and the through hole of the top cover.
The inner wall of the top cover is provided with a rubber waterproof gasket.
The inner wall of the bottom of the columnar shell is provided with a notch for embedding the columnar water permeable net.
The water inlet is communicated with a pressurized water source or a non-pressure water source.
The side wall of the water inlet chamber is provided with scales.
And water stop valves are arranged at the water inlet and the water outlet.
The intake chamber adopts transparent toughened glass material, and column shell and top cap all adopt high strength stainless steel, and the net that permeates water of column is the steel mesh.
The invention also provides a using method of the device for the radial penetration experiment of the cylindrical hollow soil sample, wherein the opening and closing valves of the water inlet and the water outlet are opened; fluid enters the water inlet chamber from the water inlet, then flows through the cylindrical hollow soil sample through the cylindrical permeable net, and finally is discharged into the drainage channel at the bottom of the cylindrical shell through the annular permeable stone; and after the test is finished, closing the opening and closing valve.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the device and the using method for the radial penetration experiment of the cylindrical hollow soil sample, provided by the invention, fluid enters the water inlet chamber from the water inlet at the top, then flows through the soil sample through the cylindrical permeable net, and finally is discharged from the soil to the drainage channel at the bottom of the cylindrical shell in the radial direction through the annular permeable stone, so that the evolution rule of the penetration of the soil under the condition of radial penetration can be reflected more truly. The device has the advantages of small occupation area, convenient and flexible use in the soil body penetration test process, effective improvement of test efficiency, enhancement of test controllability and resource saving. In addition, the invention has the advantages of simple and understandable principle, convenient and safe operation and good use and popularization value.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for radial permeation experiments of cylindrical hollow soil samples, provided by the invention;
wherein, 1, a water inlet chamber; 11. a water inlet; 2. a rubber gasket; 3. a rubber waterproof gasket; 4. a ring-shaped porous stone; 5. a water outlet; 6. a columnar water permeable net; 7. a cylindrical housing; 8. a water outlet channel; 9. a pressurizing clamp; 10. and (5) screwing the screw tightly.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the invention provides a device for a radial penetration experiment of a cylindrical hollow soil sample, which comprises a cylindrical shell 7, wherein a top cover is arranged at the top of the cylindrical shell 7, a through hole is formed in the middle of the top cover, a water inlet chamber 1 capable of moving up and down along the through hole is arranged in the through hole, and the upper part of the water inlet chamber 1 is communicated with a water inlet 11. Still include the column net 6 that permeates water, the upper end of the column net 6 that permeates water contacts or is connected with the inner wall of top cap, the lower extreme of the column net 6 that permeates water is connected with the bottom inner wall of column shell 7, intake chamber 1 is located the column net 6 that permeates water. A cylindrical hollow soil sample is placed between the cylindrical water permeable net 6 and the cylindrical shell 7, and an annular water permeable stone 4 is arranged between the cylindrical hollow soil sample and the cylindrical shell 7; the bottom of the columnar shell 7 is provided with a water outlet channel 8, the bottom end of the annular permeable stone 4 is communicated with the water outlet channel 8, and the water outlet channel 8 is communicated with the water outlet 5.
Illustratively, the columnar shell 7 is made of high-strength stainless steel materials, ensures no deformation in the whole process, is a main body component of the invention, and is provided with a water outlet channel 8 at the bottom for the outflow of seepage water and a notch in the middle for the embedding of the columnar water permeable net 6.
The annular permeable stone 4 is used for discharging seepage in a soil body to a drainage channel of the base from the radial direction, the cross section of the annular permeable stone 4 is in a closed circular ring shape, the outer diameter of the annular permeable stone 4 is the same as the inner diameter of the cylindrical shell 7, and the inner diameter of the annular permeable stone 4 is the same as the outer diameter of a soil body sample, so that the coincidence of the soil body sample, the annular permeable stone 4 and the cylindrical shell 7 is ensured.
The columnar water permeable net 6 is used for separating the water inlet chamber 1 from the soil body sample, the outer diameter of the columnar water permeable net is just the same as the inner diameter of the soil body sample, and the steel net has strong anti-deformation capacity, so that the soil body is prevented from being damaged and deformed greatly in the infiltration process, and the columnar water permeable net 6 is just matched with the notch reserved on the base.
The rubber waterproof gasket 3 is used for preventing fluid from overflowing from the top cover in the permeation process, so that the fluid is arranged below the top cover and plays a sealing role after the pressure test of the top cover.
The water inlet chamber 1 is arranged in the columnar water permeable net 6, can move up and down according to needs, is made of transparent toughened glass, and is provided with scales, so that the change condition of the internal water quantity can be observed;
the water inlet 11 is arranged above the water inlet chamber 1, can be connected to a water source with or without pressure to provide water for the water inlet chamber 1, and is provided with an opening and closing valve.
The top cover is a solid top cover made of stainless steel materials with a through hole reserved in the middle, and is used for isolating the inside of the device from the outside and playing a role in water isolation;
the pressurizing clamp 9 is mainly used for applying vertical pressure to the top cover, is made of stainless steel, is provided with a screwing screw 10, and is installed and fastened after sample loading is finished, so that the pressurizing clamp 9 is installed and the screwing screw 10 is fastened to play a pressurizing role, and the sealing performance of the whole system is guaranteed.
The water outlet 5 is positioned at the bottom end and used for collecting and measuring the amount of the permeated water, and an opening and closing valve is arranged on the water outlet.
The invention also provides a using method of the device for the radial penetration experiment of the cylindrical hollow soil sample, wherein the opening and closing valves of the water inlet 11 and the water outlet 5 are opened; fluid enters the water inlet chamber 1 from the water inlet 11, then flows through the cylindrical hollow soil sample through the cylindrical permeable net 6, and finally is discharged into a drainage channel at the bottom of the cylindrical shell 7 through the annular permeable stone 4; and after the test is finished, closing the opening and closing valve.
The device for the radial penetration experiment of the cylindrical hollow soil sample and the use method provided by the invention can reflect the evolution law of the penetration of the soil body under the condition of radial seepage more truly. The device has the advantages of small occupation area, convenient and flexible use in the soil body penetration test process, effective improvement of test efficiency, enhancement of test controllability and resource saving. In addition, the invention has the advantages of simple and understandable principle, convenient and safe operation and good use and popularization value.
Claims (6)
1. The device for the radial penetration experiment of the cylindrical hollow soil sample is characterized by comprising a cylindrical shell (7), wherein a top cover is arranged at the top of the cylindrical shell (7), a through hole is formed in the middle of the top cover, a water inlet chamber (1) capable of moving up and down along the through hole is arranged in the through hole, and the upper part of the water inlet chamber (1) is communicated with a water inlet (11);
the water inlet device is characterized by further comprising a columnar water permeable net (6), wherein the upper end of the columnar water permeable net (6) is in contact with or connected with the inner wall of the top cover, the lower end of the columnar water permeable net (6) is connected with the inner wall of the bottom of the columnar shell (7), and the water inlet chamber (1) is located in the columnar water permeable net (6);
a cylindrical hollow soil sample is placed between the cylindrical water permeable net (6) and the cylindrical shell (7), and an annular water permeable stone (4) is arranged between the cylindrical hollow soil sample and the cylindrical shell (7); a water outlet channel (8) is arranged at the bottom of the columnar shell (7), the bottom end of the annular permeable stone (4) is communicated with the water outlet channel (8), and the water outlet channel (8) is communicated with the water outlet (5);
the upper part of the pressurizing clamp (9) is connected with the upper part of the top cover, the lower part of the pressurizing clamp (9) is connected with the lower part of the columnar shell (7), and a screwing screw (10) is arranged between the upper part of the pressurizing clamp (9) and the top cover;
the inner wall of the bottom of the columnar shell (7) is provided with a notch for embedding the columnar water permeable net (6);
the water inlet (11) is communicated with a pressurized water source or a non-pressure water source;
and water stop valves are arranged at the water inlet (11) and the water outlet (5).
2. The device for the radial infiltration experiment of the cylindrical hollow soil sample according to claim 1 is characterized in that a rubber gasket (2) is arranged between the water inlet chamber (1) and the through hole of the top cover.
3. The device for the radial penetration experiment of the cylindrical hollow soil sample according to claim 1, wherein the inner wall of the top cover is provided with a rubber waterproof gasket (3).
4. The device for the radial infiltration experiment of the cylindrical hollow soil sample according to claim 1, is characterized in that the side wall of the water inlet chamber (1) is provided with scales.
5. The device for the radial penetration experiment of the cylindrical hollow soil sample according to claim 1, wherein the water inlet chamber (1) is made of transparent toughened glass, the cylindrical shell (7) and the top cover are both made of high-strength stainless steel, and the cylindrical water permeable net (6) is a steel net.
6. The use method of the device for the radial penetration test of the cylindrical hollow soil sample according to claim 1 is characterized in that the opening and closing valves of the water inlet (11) and the water outlet (5) are opened; fluid enters the water inlet chamber (1) from the water inlet (11), then flows through the cylindrical hollow soil sample through the cylindrical permeable net (6), and finally is discharged into a drainage channel at the bottom of the cylindrical shell (7) through the annular permeable stone (4); and after the test is finished, closing the opening and closing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710517344.3A CN107144514B (en) | 2017-06-29 | 2017-06-29 | Device for radial penetration experiment of cylindrical hollow soil sample and using method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710517344.3A CN107144514B (en) | 2017-06-29 | 2017-06-29 | Device for radial penetration experiment of cylindrical hollow soil sample and using method |
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| Publication Number | Publication Date |
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| CN107144514A CN107144514A (en) | 2017-09-08 |
| CN107144514B true CN107144514B (en) | 2023-04-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444887B (en) * | 2018-04-16 | 2024-05-24 | 天津大学 | Test device capable of directly and indirectly measuring horizontal permeability coefficient of soft clay |
| CN114324099A (en) * | 2021-10-22 | 2022-04-12 | 深圳先进技术研究院 | Radial penetration experimental device and method |
| CN116183460B (en) * | 2022-12-21 | 2024-03-15 | 中山大学 | Roadbed filler permeability testing device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2502784A (en) * | 1983-02-25 | 1984-08-30 | Gary L. Vondran | Concrete permeability testing device |
| JP2000081429A (en) * | 1998-09-07 | 2000-03-21 | National Agriculture Research Center | High precision easy measurement device for leaching amount of fertilizer constituent and environmental contaminant and the like |
| CN102033034A (en) * | 2010-10-29 | 2011-04-27 | 四川大学 | Soil body horizontal osmotic coefficient measuring apparatus |
| CN106872249A (en) * | 2017-03-31 | 2017-06-20 | 榆林学院 | The experimental provision of soluble ion in a kind of non-destructive removal soil body sample |
| CN206906209U (en) * | 2017-06-29 | 2018-01-19 | 榆林学院 | A kind of radial penetration experimental provision for being used to evaluate soil body radial penetration characteristic |
-
2017
- 2017-06-29 CN CN201710517344.3A patent/CN107144514B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2502784A (en) * | 1983-02-25 | 1984-08-30 | Gary L. Vondran | Concrete permeability testing device |
| JPS59159068A (en) * | 1983-02-25 | 1984-09-08 | ゲイリイ・エル・ボンドラン | Infiltration capacity test core forming device for concrete,test device and method |
| JP2000081429A (en) * | 1998-09-07 | 2000-03-21 | National Agriculture Research Center | High precision easy measurement device for leaching amount of fertilizer constituent and environmental contaminant and the like |
| CN102033034A (en) * | 2010-10-29 | 2011-04-27 | 四川大学 | Soil body horizontal osmotic coefficient measuring apparatus |
| CN106872249A (en) * | 2017-03-31 | 2017-06-20 | 榆林学院 | The experimental provision of soluble ion in a kind of non-destructive removal soil body sample |
| CN206906209U (en) * | 2017-06-29 | 2018-01-19 | 榆林学院 | A kind of radial penetration experimental provision for being used to evaluate soil body radial penetration characteristic |
Non-Patent Citations (1)
| Title |
|---|
| 重塑黏土空心圆柱试样制备技术改进及应用;沈扬等;《岩土力学》;全文 * |
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