CN219430844U - Roadbed soil matrix suction testing device - Google Patents
Roadbed soil matrix suction testing device Download PDFInfo
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- CN219430844U CN219430844U CN202320708522.1U CN202320708522U CN219430844U CN 219430844 U CN219430844 U CN 219430844U CN 202320708522 U CN202320708522 U CN 202320708522U CN 219430844 U CN219430844 U CN 219430844U
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Abstract
The utility model discloses a roadbed soil matrix suction testing device which comprises a water storage pipe, wherein water used for testing is stored in the water storage pipe, a probe is arranged on one side of the water storage pipe, the probe is buried in soil during testing, two connecting hoses are fixedly arranged at the outer ends of the probe, one end of each connecting hose is connected with the water storage pipe, and an adjusting assembly comprises an air charging pipe arranged in the water storage pipe. According to the utility model, the space capable of containing water is compressed by the adjusting component, so that the water depth change range is larger and the water pressure change range is larger when the water quantity changes, the probe and the matrix suction force are utilized, the water quantity in the water storage pipe changes, the depth and the water pressure change are caused, the matrix suction force of the soil is detected through the water pressure change, and compared with the detection through the air pressure mode, the water pressure is not influenced by the temperature change, so that the accuracy is higher.
Description
Technical Field
The utility model relates to the field of soil testing, in particular to a roadbed soil matrix suction testing device.
Background
The matrix suction force is an interaction force generated on the surfaces of solid, liquid and gas media in the soil, and can obviously influence the mechanical properties of the road foundation soil. In reality, the matrix suction force of the roadbed soil is influenced by the external environment to change at any time, which is unfavorable for evaluating the safety performance of the roadbed structure, so that the technology for testing the matrix suction force of the roadbed soil is of great importance.
In the prior art, water is injected into a professional detection probe, when the suction force of a matrix is large, water is sucked into the soil from the probe, otherwise, the water in the soil is sucked into the probe, so that the suction force of the matrix is detected, as shown in the Chinese patent applied earlier by the team of the inventor: an indoor rapid automatic testing device and method for roadbed soil matrix suction with publication number of CN 115711983A.
In the above-mentioned comparison technique, the probe is communicated with the sealed water storage tube, when the water quantity in the water storage tube is changed, the change of air pressure is caused, and then the suction force of the substrate is detected through the change of air pressure, but the air pressure is easily influenced by temperature, so that the accuracy of detection is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a roadbed soil matrix suction testing device which can effectively solve the problem that the accuracy of matrix suction detection is reduced due to the fact that air pressure is extremely easy to be influenced by temperature.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the roadbed soil matrix suction testing device comprises a water storage pipe, wherein water used for testing is stored in the water storage pipe, one side of the water storage pipe is provided with a probe, the probe is buried in soil during testing, two connecting hoses are fixedly arranged at the outer ends of the probe, one end of each connecting hose is connected with the water storage pipe so as to connect the probe with the interior of the water storage pipe, and a pressure sensor and an adjusting component are arranged in the water storage pipe;
the adjusting component comprises an air charging pipe arranged in the water storage pipe, an elastic air bag is fixedly arranged at the outer end of the air charging pipe, the air bag can expand after being inflated, a plurality of air guide holes are formed in the outer end of the air charging pipe, the air guide holes are positioned in the air bag, and air can be injected into the air bag through the air guide holes;
the bottom end of the water storage pipe is provided with a lower end cover, the pressure sensor is fixedly arranged at the top end of the lower end cover, the position of the pressure sensor is fixed, and the pressure sensor is always positioned at the bottommost end inside the water storage pipe.
Further, the upper end cover is installed on the top end of the water storage pipe, the top end of the air inflation pipe extends to the top end of the upper end cover and is fixedly connected with the upper end cover, a valve is fixedly arranged on the air inflation pipe so as to inflate the air inflation pipe, and the air holes are formed in the upper end cover and are communicated with the inside and the outside of the water storage pipe, so that the air pressure inside and outside the water storage pipe is equal.
Further, sealing covers are fixedly arranged at the two ends of the probe, and the two ends of the probe are sealed through the sealing covers;
the probe comprises an inner permeable stone layer, a hydrophilic membrane is fixedly arranged at the outer end of the inner permeable stone layer, an outer permeable stone layer is fixedly arranged at the outer end of the hydrophilic membrane, and water can flow in and out through the probe.
Further, the water injection hose is fixedly arranged at the outer end of the water storage pipe, the valve is fixedly arranged on the water injection hose, the water adding hopper is fixedly arranged at one end of the water injection hose, water is added into the water storage pipe through the water adding hopper and the water injection hose, and water enters from the bottom, so that bubbles generated in the water pouring process can be reduced.
Compared with the prior art, the utility model provides a roadbed soil matrix suction testing device, which has the following beneficial effects:
the water storage pipe is compressed through the adjusting component, so that the water depth change range is larger when the water quantity changes, the water pressure change range is also larger, the probe and the matrix suction force are utilized, the water quantity in the water storage pipe changes, the depth and the water pressure change are caused, the matrix suction force of the soil is detected through the water pressure change, and the accuracy is high.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of a roadbed soil matrix suction testing apparatus according to the present utility model.
FIG. 2 is a cross-sectional view of a probe of the foundation soil matrix suction testing device of the present utility model.
FIG. 3 is a perspective view of the conditioning assembly of the foundation soil matrix suction testing device of the present utility model.
FIG. 4 is a perspective cross-sectional view of a water storage tube of the foundation soil matrix suction testing device of the present utility model.
FIG. 5 is a perspective cross-sectional view of a water storage tube of the foundation soil matrix suction testing device of the present utility model.
Fig. 6 is a perspective cross-sectional view of a probe of the roadbed soil matrix suction testing device of the present utility model.
In the figure: 1. a water storage pipe; 2. a connecting hose; 3. a probe; 301. an outer permeable stone layer; 302. a hydrophilic membrane; 303. an inner permeable stone layer; 4. a water injection hose; 5. a water adding hopper; 6. an adjustment assembly; 601. an inflation tube; 602. an air guide hole; 603. an air bag; 7. an upper end cap; 8. sealing cover; 9. a lower end cap; 10. a pressure sensor; 11. and (5) ventilation holes.
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 figures 1-5, the utility model provides a roadbed soil matrix suction testing device, which comprises a water storage pipe 1, wherein water used for testing is stored in the water storage pipe 1, one side of the water storage pipe 1 is provided with a probe 3, the probe 3 is buried in soil during testing, the outer end of the probe 3 is fixedly provided with two connecting hoses 2, one end of each connecting hose 2 is connected with the water storage pipe 1, the probe 3 is connected with the water storage pipe 1, a pressure sensor 10 and an adjusting component 6 are arranged in the water storage pipe 1, and the water pressure in the water storage pipe 1 is tested through the pressure sensor 10.
The adjusting component 6 comprises an air charging pipe 601 arranged in the water storage pipe 1, an elastic air bag 603 is fixedly arranged at the outer end of the air charging pipe 601, the air bag 603 can be inflated after being inflated, a plurality of air guide holes 602 are formed in the outer end of the air charging pipe 601, the air guide holes 602 are located in the air bag 603, and air can be injected into the air bag 603 through the air guide holes 602.
The bottom end of the water storage pipe 1 is provided with a lower end cover 9, the pressure sensor 10 is fixedly arranged at the top end of the lower end cover 9, the position of the pressure sensor 10 is fixed, and the pressure sensor is always positioned at the bottommost end inside the water storage pipe 1.
In the testing process, firstly, water is injected into the water storage pipe 1, the probe 3 is communicated with the water storage pipe 1 through the connecting hose 2, so that water in the water storage pipe 1 flows into the probe 3, the probe 3 is placed at a position lower than the water storage pipe 1, the connecting hose 2 is straightened, bubbles in the probe 3 flow into the water storage pipe 1 under the action of buoyancy, and finally rise to the liquid level, so that the bubbles are discharged. Then the probe 3 is buried in the soil to be detected, the position of the probe 3 is lower than the liquid level in the water storage tube 1, then the air is inflated into the air inflation tube 601, the air enters the water storage tube 1 through the air guide holes 602 at the outer end of the air inflation tube 601, the air bag 603 is inflated, the inflated air bag 603 presses the water in the water storage tube 1, and the space for containing the water in the water storage tube 1 is compressed, so that after the water quantity in the water storage tube 1 is changed, the depth change amplitude of the water in the water storage tube 1 is larger, and the change of the hydraulic pressure is more obvious.
At this time, when water in the probe 3 seeps out due to the matrix suction force or water in the soil is sucked into the probe 3, the water amount in the water storage pipe 1 is changed, and the water pressure detected by the pressure sensor 10 is changed, so that the matrix suction force of the soil is detected through the water pressure change, and compared with the detection through the air pressure mode, the accuracy is higher.
In order to balance the air pressure inside and outside the water storage pipe 1, as shown in fig. 1 and 4, the top end of the water storage pipe 1 is provided with an upper end cover 7, the top end of the air charging pipe 601 extends to the top end of the upper end cover 7 and is fixedly connected with the upper end cover 7, and a valve is fixedly arranged on the air charging pipe 601 so as to charge the air charging pipe 601. The upper end cover 7 is provided with the air holes 11, the air holes 11 are communicated with the inside and the outside of the water storage pipe 1, so that the air pressure inside and outside the water storage pipe 1 is equal, the water quantity change inside the water storage pipe 1 can not cause the change of the air pressure inside the water storage pipe 1, and the influence of the air pressure change of the liquid level on the water pressure is avoided.
In order to ensure that water can pass through the probe 3, as shown in fig. 2 and 6, sealing covers 8 are fixedly arranged at two ends of the probe 3, and the two ends of the probe 3 are sealed through the sealing covers 8;
the probe 3 comprises an inner permeable stone layer 303, a hydrophilic film 302 is fixedly arranged at the outer end of the inner permeable stone layer 303, an outer permeable stone layer 301 is fixedly arranged at the outer end of the hydrophilic film 302, and water can flow in and out through the probe 3.
Because the permeability coefficient of the outer permeable stone layer 301 and the inner permeable stone layer 303 is 5-20 times of that of the hydrophilic membrane 302, only moisture can pass through the hydrophilic membrane 302 under the action of certain air pressure, and the moisture can pass through quickly, the water in the device is isolated from the outside by utilizing the characteristic that the hydrophilic membrane 302 is permeable and airtight in a certain pressure range, the water depth in the water storage tube 1 is regulated by the regulating component 6, and the height of the probe 3 is controlled, so that the pressure born by the hydrophilic membrane 302 is in the pressure range, when the matrix suction force is large, the moisture is sucked into the soil from the probe 3, otherwise, the moisture in the soil is sucked into the probe 3, and the water quantity in the water storage tube 1 is changed.
The water injection hose 4 is fixedly arranged at the outer end of the water storage pipe 1, the valve is fixedly arranged on the water injection hose 4, the water adding hopper 5 is fixedly arranged at one end of the water injection hose 4, water entering the water adding hopper 5 flows into the water storage pipe 1 through the water injection hose 4 by pouring water into the water adding hopper 5, after the liquid level passes through the joint of the water injection hose 4 and the water storage pipe 1, the subsequent water flows into the water storage pipe 1 through the position below the liquid level, and compared with pouring water on the liquid level, fewer bubbles are generated in the mode, and the interference of the bubbles is reduced.
In this specification, each embodiment is described in a related manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims (4)
1. Roadbed soil matrix suction testing arrangement, including aqua storage tube (1), aqua storage tube (1) one side is equipped with probe (3), probe (3) outer end is fixed and is equipped with two coupling hose (2), and coupling hose (2) one end is connected its characterized in that with aqua storage tube (1): a pressure sensor (10) and an adjusting component (6) are arranged in the water storage pipe (1);
the adjusting component (6) comprises an air charging pipe (601) arranged in the water storage pipe (1), an elastic air bag (603) is fixedly arranged at the outer end of the air charging pipe (601), a plurality of air guide holes (602) are formed in the outer end of the air charging pipe (601), and the air guide holes (602) are positioned in the air bag (603);
the bottom end of the water storage pipe (1) is provided with a lower end cover (9), and the pressure sensor (10) is fixedly arranged at the top end of the lower end cover (9).
2. The roadbed soil matrix suction testing device according to claim 1, wherein: the upper end cover (7) is installed on the top end of the water storage pipe (1), the top end of the air inflation pipe (601) extends to the top end of the upper end cover (7) and is fixedly connected with the upper end cover (7), a valve is fixedly arranged on the air inflation pipe (601), and an air hole (11) is formed in the upper end cover (7).
3. The roadbed soil matrix suction testing device according to claim 1, wherein: sealing covers (8) are fixedly arranged at two ends of the probe (3), and the two ends of the probe (3) are sealed through the sealing covers (8);
the probe (3) comprises an inner permeable stone layer (303), a hydrophilic membrane (302) is fixedly arranged at the outer end of the inner permeable stone layer (303), and an outer permeable stone layer (301) is fixedly arranged at the outer end of the hydrophilic membrane (302).
4. The roadbed soil matrix suction testing device according to claim 1, wherein: the water storage device is characterized in that a water injection hose (4) is fixedly arranged at the outer end of the water storage tube (1), a valve is fixedly arranged on the water injection hose (4), a water adding hopper (5) is fixedly arranged at one end of the water injection hose (4), and water is added into the water storage tube (1) through the water adding hopper (5) and the water injection hose (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320708522.1U CN219430844U (en) | 2023-04-03 | 2023-04-03 | Roadbed soil matrix suction testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320708522.1U CN219430844U (en) | 2023-04-03 | 2023-04-03 | Roadbed soil matrix suction testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219430844U true CN219430844U (en) | 2023-07-28 |
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ID=87343010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320708522.1U Active CN219430844U (en) | 2023-04-03 | 2023-04-03 | Roadbed soil matrix suction testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219430844U (en) |
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2023
- 2023-04-03 CN CN202320708522.1U patent/CN219430844U/en active Active
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