CN220568615U - Test device for detecting permeability coefficient of soil body by constant water head - Google Patents
Test device for detecting permeability coefficient of soil body by constant water head Download PDFInfo
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- CN220568615U CN220568615U CN202321318400.8U CN202321318400U CN220568615U CN 220568615 U CN220568615 U CN 220568615U CN 202321318400 U CN202321318400 U CN 202321318400U CN 220568615 U CN220568615 U CN 220568615U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 211
- 239000002689 soil Substances 0.000 title claims abstract description 28
- 230000035699 permeability Effects 0.000 title claims abstract description 16
- 230000001502 supplementing effect Effects 0.000 claims description 23
- 230000008595 infiltration Effects 0.000 claims description 17
- 238000001764 infiltration Methods 0.000 claims description 17
- 230000003204 osmotic effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 8
- 230000035515 penetration Effects 0.000 description 4
- 230000003020 moisturizing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model provides a test device for detecting the permeability coefficient of a soil body by a constant water head, which comprises a permeation container, wherein an exhaust pipe is arranged at the bottom of the permeation container, a water outlet pipe is arranged at the top of the permeation container, a water supply bottle is connected to the exhaust pipe, a water head measuring pipe is communicated with the side wall of the water supply bottle, and a measuring cylinder is arranged at the bottom of the water outlet pipe.
Description
Technical Field
The utility model relates to the technical field of geotechnical tests, in particular to a test device for detecting soil permeability coefficient by a constant water head.
Background
As shown in figure 1, the national standard GB/T50123-2019 section 16.2 variable head penetration test method comprises the following steps,
(1) the infiltration container (2) filled with soil body samples is communicated with a water supply bottle (3) and a variable water head pipe (1).
(2) The water supply bottle is used for filling the water inlet pipe, the exhaust pipe (6) is opened after the water is injected into the infiltration container, and the exhaust pipe is closed after the air at the bottom of the infiltration container is removed.
(3) Standing for a period of time under the action of a certain water head, and starting to perform test measurement after water overflows from the outlet pipe (7).
(4) After the variable water head pipe is filled with water to the required height, the water clamp 5 (2) is closed, the initial water head height Hb1 and the initial time in the variable water head pipe are measured and recorded, the water head height Hb2 is measured according to a preset time interval, and one-time data measurement and recording are completed. After the water is continuously measured and recorded for 2 to 3 times, the water stop clamp 5 (2) is opened again, so that the water level of the water head pipe is raised to the required height, the water is continuously measured and recorded for several times, and the test is repeated for 5 to 6 times.
The osmotic coefficient calculation formula is as follows:
kT＝2.3*a*L/(A*t)*lg(Hb1/Hb2)
wherein a is a cross section area (cm 2) of a variable head pipe; l is the seepage diameter (cm) which is equal to the height of the sample; a the cross-sectional area (cm 2) of the sample; time(s) between termination and start at t; hb1 head (cm) at the beginning; head (cm) at the end of Hb 2. Because the water head height in the infiltration container and the action after the test starts to measure and record is Hb and is changed in real time, the state that the soil body bears the normal pressure water head in the natural environment cannot be simulated; and along with the increase of test time, it is difficult to provide sufficient water head pressure to carry out the penetration test when the water level of the variable water head pipe drops to lower, need to interrupt test survey and record, reopen the stagnant water clamp and make the water supply bottle provide water pressure to the water level in the variable water head pipe rise back to the required height, then begin test data survey and record again, can accomplish the test, test operation step is loaded down with trivial details.
Disclosure of Invention
The utility model aims to provide a test device for detecting the permeability coefficient of a soil body by a constant water head so as to overcome the defects in the prior art.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the utility model provides a constant head detects test device of soil body osmotic coefficient, infiltration container bottom is provided with the blast pipe, infiltration container top is provided with the outlet pipe, infiltration container has the water supply bottle through inlet tube connection, water supply bottle lateral wall intercommunication has the head to survey buret, the bottom of outlet pipe is provided with the graduated flask.
In the scheme, (1) the infiltration container filled with the soil body sample is communicated with a water supply bottle;
(2) the water supply bottle is used for filling the water inlet pipe, the exhaust pipe is opened after the water is injected into the infiltration container, and the exhaust pipe is closed after the air at the bottom of the infiltration container is removed.
(3) Standing for a period of time under the action of a certain water head, and starting to perform test measurement after water overflows from a water outlet pipe orifice.
(4) Supplementing water into the water supply bottle so as to ensure that the water head height in the water supply bottle is kept at a constant value, and measuring the water head height H through a water head measuring pipe; starting to measure the initial liquid level volume Vb1 and the initial time in the measuring cylinder, measuring the end liquid level volume Vb2 according to a preset time interval, and completing one-time data measurement. This measurement was performed 5 to 6 times or more.
The osmotic coefficient calculation formula is as follows:
kT＝(Vb2-Vb1)*L/(A*t*H)
wherein A is the cross-sectional area (cm 2) of a sample; h is the height (cm) of a constant water head; l is the seepage diameter (cm) which is equal to the height of the sample; time(s) between termination and start at t; vb1 initially measuring the volume of water (ml) in the cylinder; volume of water (ml) in the cylinder was measured upon termination of Vb 2. The water head measuring pipe and the water supply bottle are made to be U-shaped communicating vessels so as to keep the liquid level of the water head measuring pipe constant, thereby realizing soil body penetration test under the condition of indoor constant water head measuring pipe liquid level H, and being more in line with the state that the soil body bears normal pressure water head under the real environment.
As an improvement of the test device for detecting the soil permeability coefficient by the constant water head, the top of the water supply bottle is connected with the water supplementing bottle.
In the above-mentioned scheme, because its height is in the state of descending gradually when supplying water of water supply bottle, in order to keep the height of water supply bottle and water head buret constant, consequently, increase the moisturizing bottle, through moisturizing bottle to the interior moisturizing of water supply bottle to make the height of water supply bottle and water head buret constant.
As an improvement of the test device for detecting the soil permeability coefficient by the constant head, the water supplementing bottle is connected with a water receiving source pipe, and the water receiving source pipe is connected with the water supplementing bottle and the water supply pipe in parallel.
In the scheme, when the water supplementing bottle cannot be used, the water supplementing bottle can be supplemented with water by connecting a water source through the water receiving source pipe.
As an improvement of the test device for detecting the soil permeability coefficient by the constant water head, the utility model is characterized in that an overflow pipe is arranged on the side wall of the top of the water supply bottle, and an overflow water collecting bottle is arranged below the overflow pipe.
In the scheme, the joint between the water supply bottle and the overflow pipe is set to be at a constant height, and when the water of the water supply bottle is lower than the constant height, the water supplementing bottle or the water receiving source pipe supplements water for the water supply bottle, and redundant water flows into the overflow water collecting bottle through the overflow pipe.
As an improvement of the test device for detecting the soil permeability coefficient by the constant water head, the utility model further comprises a water stop clamp, wherein the water stop clamp is arranged on the exhaust pipe and the water inlet pipe, the water receiving source pipe and the pipeline between the water supplementing bottle and the water supplying bottle.
In the scheme, the water stop clamp is used for controlling the opening and closing of the exhaust pipe and the water inlet pipe and the opening and closing of the water receiving source pipe, and the opening and closing between the water supplementing bottle and the water supplying bottle.
Compared with the prior art, the utility model has the beneficial effects that: the water head measuring pipe, the water supplementing bottle, the overflow pipe and the overflow water collecting bottle are added, so that the soil body permeability test is continuously carried out under the condition of indoor constant water head height H, and the condition that the soil body is subjected to the normal pressure water head under the real environment is more met.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic diagram of a national standard test device structure in the background art;
FIG. 2 is a schematic diagram of the structure of the test device of the present utility model.
Wherein, 1, a measuring cylinder; 2. a permeation vessel; 3. a water supply bottle; 4. connecting a water source pipe; 5. a water stop clamp; 6. an exhaust pipe; 7. a water outlet pipe; 8. an overflow pipe; 9. an overflow water collection bottle; 10. supplementing water bottles; 11. a water head measuring tube; 12. a water inlet pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 2, a test device for detecting the permeability coefficient of soil body by using a constant water head is characterized in that an exhaust pipe 6 is arranged at the bottom of a permeation container 2, a water outlet pipe 7 is arranged at the top of the permeation container 2, a water supply bottle 3 is connected with the permeation container 2 through a water inlet pipe 12, a water head measuring pipe 11 is communicated with the side wall of the water supply bottle 3, and a measuring cylinder 1 is arranged at the bottom of the water outlet pipe 7.
(2) The infiltration container 2 filled with the soil body sample is communicated with the water supply bottle 3;
(2) the water supply bottle 3 is used for filling the water inlet pipe 12, the exhaust pipe 6 is opened after the water is injected into the infiltration container 2, and the exhaust pipe 6 is closed after the air at the bottom of the infiltration container 2 is discharged.
(3) Standing for a period of time under the action of a certain water head, and starting to perform test measurement after water overflows from the 7 ports of the water outlet pipe.
(4) Supplementing water into the water supply bottle 3 so that the water head height in the water supply bottle 3 is kept at a constant value and the water head height H is measured by the water head measuring pipe 11; starting to measure the initial liquid level volume Vb1 and the initial time in the measuring cylinder 1, and measuring the end liquid level volume Vb2 at predetermined time intervals to complete one data measurement. The measurement is continuously performed for 5 to 6 times.
The osmotic coefficient calculation formula is as follows:
kT＝(Vb2-Vb1)*L/(A*t*H)
wherein A is the cross-sectional area (cm 2) of a sample; h is the height (cm) of a constant water head; l is the seepage diameter (cm) which is equal to the height of the sample; time(s) between termination and start at t; vb1 initially measuring the volume (ml) of water in cylinder 1; volume of water (ml) in cylinder 1 upon termination of Vb 2. The water head measuring pipe 11 and the water supply bottle 3 are made to be U-shaped communicating vessels so as to keep the liquid level height of the water head measuring pipe 11 constant, thereby realizing soil body penetration test under the condition of indoor constant water head measuring pipe 11 liquid level height H, and being more in line with the state that the soil body is subjected to normal pressure water head under the real environment.
The top of the water supply bottle 3 is connected with a water supplementing bottle 10.
Since the height of the water supply bottle 3 is in a gradually lowered state at the time of water supply, in order to keep the heights of the water supply bottle 3 and the water head measuring pipe 11 constant, the water replenishment bottle 10 is added, and water is replenished into the water supply bottle 3 through the water replenishment bottle 10 so that the heights of the water supply bottle 3 and the water head measuring pipe 11 are constant.
The water supplementing bottle 10 is connected with a water receiving source pipe 4, and the water receiving source pipe 4 is connected with the water supplementing bottle 10 and a water supply pipe in parallel.
When the water replenishing bottle 10 cannot be used, the water replenishing bottle 3 can be replenished by connecting the water source through the water receiving source pipe 4.
The top lateral wall of water supply bottle 3 is provided with overflow pipe 8, and overflow pipe 8 below is provided with overflow water collecting bottle 9.
The joint between the water supply bottle 3 and the overflow pipe 8 is set to be at a constant height, and when the water in the water supply bottle 3 is lower than the height, the water supplementing bottle 10 or the water receiving source pipe 4 supplements water for the water supply bottle 3, and the redundant water flows into the overflow water collecting bottle 9 through the overflow pipe 8.
The test device further comprises a water stop clamp 5, wherein the water stop clamp 5 is arranged on the exhaust pipe 6 and the water inlet pipe 12, is arranged on the water receiving source pipe 4 and is arranged on a pipeline between the water supplementing bottle 10 and the water supplying bottle 3.
The water stop clamp 5 is used for controlling the opening and closing of the exhaust pipe 6 and the water inlet pipe 12 and the opening and closing of the water receiving source pipe 4 and the opening and closing between the water supplementing bottle 10 and the water supplying bottle 3.
The beneficial effects of the utility model are as follows: the water head measuring pipe 11, the water supplementing bottle 10, the overflow pipe 8 and the overflow water collecting bottle 9 are added, so that the soil body permeability test is continuously carried out under the condition of indoor constant water head height H, and the condition that the soil body is subjected to the normal pressure water head in the real environment is more met.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (5)
1. The utility model provides a test device of constant head detection soil body osmotic coefficient, includes the infiltration container, its characterized in that, infiltration container bottom is provided with the blast pipe, infiltration container top is provided with the outlet pipe, infiltration container has the water supply bottle through inlet tube connection, water supply bottle lateral wall intercommunication has the head to survey the pipe, the bottom of outlet pipe is provided with the graduated flask.
2. The test device for detecting the permeability coefficient of soil body by using a constant head according to claim 1, wherein the top of the water supply bottle is connected with a water supplementing bottle.
3. The test device for detecting the permeability coefficient of soil body by using a constant head according to claim 2, wherein the water supplementing bottle is connected with a water receiving source pipe, and the water receiving source pipe is connected with the water supplementing bottle and the water supply pipe in parallel.
4. The test device for detecting the permeability coefficient of soil body by using a constant head according to claim 1, wherein an overflow pipe is arranged on the side wall of the top of the water supply bottle, and an overflow water collecting bottle is arranged below the overflow pipe.
5. The test device for detecting the permeability coefficient of soil body by using a constant head according to claim 1, further comprising a water stop clamp, wherein the water stop clamp is arranged at the exhaust pipe and the water inlet pipe, on the water receiving source pipe and on the pipeline between the water supplementing bottle and the water supplying bottle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321318400.8U CN220568615U (en) | 2023-05-29 | 2023-05-29 | Test device for detecting permeability coefficient of soil body by constant water head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321318400.8U CN220568615U (en) | 2023-05-29 | 2023-05-29 | Test device for detecting permeability coefficient of soil body by constant water head |
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| Publication Number | Publication Date |
|---|---|
| CN220568615U true CN220568615U (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321318400.8U Active CN220568615U (en) | 2023-05-29 | 2023-05-29 | Test device for detecting permeability coefficient of soil body by constant water head |
Country Status (1)
| Country | Link |
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| CN (1) | CN220568615U (en) |
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2023
- 2023-05-29 CN CN202321318400.8U patent/CN220568615U/en active Active
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