CN210180583U - Probe type soil body pore water pressure detection device - Google Patents
Probe type soil body pore water pressure detection device Download PDFInfo
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- CN210180583U CN210180583U CN201921425696.7U CN201921425696U CN210180583U CN 210180583 U CN210180583 U CN 210180583U CN 201921425696 U CN201921425696 U CN 201921425696U CN 210180583 U CN210180583 U CN 210180583U
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- detection device
- pore water
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Abstract
The utility model discloses a probe formula soil body pore water pressure detection device, the detection body includes the water inlet section from first end to second end order, pressure detection section and device installation section, the water inlet section is equipped with a plurality of first inlet openings, pressure detection section and water inlet section intercommunication, the device installation section is isolated with the pressure detection section, the drill bit is installed at detection body first end, the filter core is installed in the water inlet section, airtight film is located the pressure detection section, airtight film is filled with insulating liquid or gas, the sensor body among the pressure sensor is installed in the device installation section, piezo-resistor is located airtight film, piezo-resistor passes through the wire and is connected with the sensor body electricity, it is sealed to detect body second end; the second end of the detection pipe body is sealed, so that the sensor body cannot be in contact with moisture, the sensor body is prevented from being corroded by the moisture, the water pressure detection device can be buried in soil for a long time and can normally work, and the problem existing in the prior art is solved.
Description
Technical Field
The utility model relates to a civil engineering technical field especially relates to a probe formula soil body pore water pressure detection device.
Background
In geotechnical engineering, the problem of observing pore water pressure change of a foundation soil body or a side slope and the like under the action of external load or natural load is long-standing. Especially, in recent decades, the scale of artificial construction projects is getting larger and higher, and the observation of pore water pressure in soil is a problem which cannot be avoided in the judgment of indexes such as foundation stability, soil consolidation degree and the like.
The pressure detection device generally comprises a sensor body and a shell surrounding the sensor body, and the pressure detection device is buried in soil for a long time, so that the pressure sensor is easy to corrode in a humid environment, and improvement is needed.
SUMMERY OF THE UTILITY MODEL
For the technical problem who exists among the solution background art, the utility model provides a probe formula soil body pore water pressure detection device.
The utility model provides a probe type soil body pore water pressure detection device, which comprises a detection pipe body, a drill bit, a filter element, a closed film and a pressure sensor;
the detection pipe body sequentially comprises a water inlet section, a pressure detection section and a device installation section from a first end to a second end, wherein the water inlet section is provided with a plurality of first water inlet holes, the pressure detection section is communicated with the water inlet section, and the device installation section is isolated from the pressure detection section;
the drill bit is arranged at the first end of the detection pipe body;
the filter element is arranged in the water inlet section;
the closed film is positioned in the pressure detection section, the closed film is filled with insulating liquid or gas, and the closed film is in an expansion state;
the pressure sensor comprises a sensor body, a piezoresistor and a wire, wherein the sensor body is arranged in the device mounting section, the piezoresistor is positioned in the closed film, and the piezoresistor is electrically connected with the sensor body through the wire;
and sealing the second end of the detection pipe body.
Preferably, the gas is an inert gas.
Preferably, the pressure detection section has an internal volume of V1, the sealed membrane has a volume of V2, V1/V2= i, and 1 < i < 1.5.
Preferably, the piezoresistors are spaced a distance from the inner wall of the containment film.
Preferably, still include the cartridge filter, be equipped with a plurality of second inlet openings on the cartridge filter, the cartridge filter is coaxial fit in the section of intaking, is provided with geotechnological cloth between cartridge filter and the section of intaking.
Preferably, the drill is detachably mounted on the detection tube body.
Preferably, the outer wall of the detection pipe body is provided with threads.
In the probe type soil body pore water pressure detection device provided by the utility model, the water in the soil enters the water inlet section through the first water inlet hole, when entering the pressure detection end, because the piezoresistor is sealed in the closed film, the moisture in the soil can not contact with the piezoresistor, thereby preventing the piezoresistor from being corroded by moisture, the moisture in the pressure detection section can generate pressure to the closed film, so that the insulation liquid or gas in the closed film generates pressure on the piezoresistor, the pressure of the soil pore water can be detected by the piezoresistor, the pressure detection section is isolated from the device installation section, the second end of the detection tube body is sealed, so that the sensor body can not contact with moisture and can be prevented from being corroded by the moisture, and then water pressure detection device can bury in soil and can normally work for a long time, has solved the problem that exists among the prior art.
Drawings
Fig. 1 is an axonometric view of a probe type soil body pore water pressure detection device provided by the utility model;
fig. 2 is an explosion schematic view of a probe type soil body pore water pressure detection device provided by the utility model;
fig. 3 is the utility model provides a cross-sectional view of probe formula soil body pore water pressure detection device.
Detailed Description
As shown in fig. 1-3, fig. 1 is the utility model provides a probe formula soil body pore water pressure detection device's axonometric drawing, fig. 2 is the utility model provides a probe formula soil body pore water pressure detection device's explosion schematic diagram, fig. 3 is the utility model provides a probe formula soil body pore water pressure detection device's cross-sectional view.
Referring to fig. 1-3, the utility model provides a probe type soil body pore water pressure detection device, which comprises a detection tube body 1, a drill bit 2, a filter element 3, a closed film 4 and a pressure sensor;
the detection pipe body 1 is of a cylindrical pipe body structure, the detection pipe body 1 sequentially comprises a water inlet section 11, a pressure detection section 12 and a device installation section 13 from a first end to a second end, the water inlet section 11 is provided with a plurality of first water inlet holes, moisture in soil enters the water inlet section 11 through the first water inlet holes, the pressure detection section 12 is communicated with the water inlet section 11, the moisture entering the water inlet section 11 enters the pressure detection section 12 again, and the device installation section 13 is isolated from the pressure detection section 12 through a partition plate;
the drill bit 2 is arranged at the first end of the detection pipe body 1, and the drill bit 2 is convenient for the water pressure detection device to drill into a hole dug in advance or directly drill into soil;
the filter element 3 is arranged in the water inlet section 11, and the filter element 3 filters water entering the water inlet section 11 to prevent impurities from entering the pressure detection section 12;
the closed film 4 is positioned in the pressure detection section 12, the closed film 4 is filled with insulating liquid or gas, the closed film 4 is in an expansion state, the gas is filled in the embodiment, moisture in the pressure detection section 12 can generate pressure on the closed film 4, and the gas in the closed film 4 can generate pressure on the piezoresistor 52, so that the moisture pressure of the pressure detection section 12 is transmitted to the piezoresistor 52, and further the soil pore water pressure which can be detected by the piezoresistor 52 is detected;
the pressure sensor comprises a sensor body 51, a piezoresistor 52 and a lead 53, wherein the sensor body 51 is arranged in the device mounting section 13, the piezoresistor 52 is positioned in the closed film 4, and the piezoresistor 52 is electrically connected with the sensor body 51 through the lead 53; in addition, the pressure sensor also comprises a communication line, the communication line is connected with the sensor body 51, and the communication line penetrates out of the detection tube body 1 so as to transmit data measured by the pressure sensor.
The second end of the detection pipe body 1 is sealed.
The probe formula soil body pore water pressure detection device that this embodiment provided, moisture in the soil gets into water section 11 through first inlet opening, get into pressure detection end, because it is sealed in airtight film 4 during piezo-resistor 52, moisture in the soil can not contact with piezo-resistor 52, thereby prevent piezo-resistor 52 by the moisture corrosion, pressure detection section 12 is isolated with device installation section 13 again, it is sealed to detect 1 second end of body, thereby sensor body 51 can not contact with moisture, avoided sensor body 51 again by the moisture corrosion, and then water pressure detection device can bury in soil and can normally work for a long time, the problem that exists among the prior art has been solved.
The gas is an inert gas, in this embodiment, the gas is helium; in other embodiments, the insulating liquid may be, for example, mineral oil, silicone oil, or the like.
The volume in the pressure detection section 12 is V1, the volume of the sealing film 4 is V2, V1/V2= i, 1 < i < 1.5, i =1.3 in this embodiment, so that moisture can be contained between the pressure detection section 12 and the sealing film 4.
The piezoresistor 52 is spaced from the inner wall of the sealed film 4, specifically, the material of the lead 53 positioned in the sealed film 4 is hard, the piezoresistor 52 is supported in the sealed film 4 and is not contacted with the inner wall of the sealed film 4, so that the piezoresistor 52 is prevented from contacting with the sealed film 4 to cause the sealed film 4 to apply pressure on the piezoresistor 52, and further the piezoresistor 52 is prevented from being tested inaccurately.
In order to further prevent the impurity entering in the soil, still include cartridge filter 6, be equipped with a plurality of second inlet openings on the cartridge filter 6, 6 coaxial arrangements of cartridge filter are in section 11 intakes, 6 periphery walls of cartridge filter and the section 11 inner wall of intaking laminate mutually, impurity in the cartridge filter 6 further prevention soil gets into in the cartridge filter 6, and be provided with geotechnological cloth 7 between cartridge filter 6 and the section 11 of intaking, geotechnological cloth 7 filters the moisture that gets into in the cartridge filter 6, in order to prevent tiny impurity entering cartridge filter 6, geotechnological cloth 7 has good water permeability, moisture in the soil can pass through smoothly, geotechnological cloth 7 is corrosion-resistant, can be corrosion-resistant for a long time in the earth and the aquatic of the pH valve of difference.
The outer wall of the detection pipe body 1 is provided with threads, the detection pipe body 1 is rotated under the condition that holes are not dug in advance in soil, the detection device can be screwed into the soil, and when the detection pipe body 1 is rotated reversely, the detection device is screwed out of the soil.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. A probe type soil body pore water pressure detection device is characterized by comprising a detection pipe body (1), a drill bit (2), a filter element (3), a closed film (4) and a pressure sensor;
the detection pipe body (1) sequentially comprises a water inlet section (11), a pressure detection section (12) and a device installation section (13) from a first end to a second end, the water inlet section (11) is provided with a plurality of first water inlet holes, the pressure detection section (12) is communicated with the water inlet section (11), and the device installation section (13) is isolated from the pressure detection section (12);
the drill bit (2) is arranged at the first end of the detection pipe body (1);
the filter element (3) is arranged in the water inlet section (11);
the closed film (4) is positioned in the pressure detection section (12), the closed film (4) is filled with insulating liquid or gas, and the closed film (4) is in an expansion state;
the pressure sensor comprises a sensor body (51), a piezoresistor (52) and a lead (53), wherein the sensor body (51) is arranged in the device mounting section (13), the piezoresistor (52) is positioned in the closed film (4), and the piezoresistor (52) is electrically connected with the sensor body (51) through the lead (53);
the second end of the detection tube body (1) is sealed.
2. The probe type soil body pore water pressure detection device according to claim 1, wherein the gas is an inert gas.
3. The probe type soil body pore water pressure detection device as claimed in claim 1, wherein the internal volume of the pressure detection section (12) is V1, the volume of the sealing film (4) is V2, V1/V2= i, and 1 < i < 1.5.
4. The probe type soil body pore water pressure detection device as claimed in claim 1, wherein the piezoresistor (52) is spaced from the inner wall of the airtight film (4).
5. The probe type soil body pore water pressure detection device according to claim 1, further comprising a filter cartridge (6), wherein a plurality of second water inlet holes are formed in the filter cartridge (6), the filter cartridge (6) is coaxially matched in the water inlet section (11), and a geotextile (7) is arranged between the filter cartridge (6) and the water inlet section (11).
6. The probe type soil body pore water pressure detection device according to claim 1, wherein the drill bit (2) is detachably mounted on the detection pipe body (1).
7. The probe type soil body pore water pressure detection device according to claim 1, wherein the outer wall of the detection pipe body (1) is provided with threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921425696.7U CN210180583U (en) | 2019-08-30 | 2019-08-30 | Probe type soil body pore water pressure detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921425696.7U CN210180583U (en) | 2019-08-30 | 2019-08-30 | Probe type soil body pore water pressure detection device |
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| Publication Number | Publication Date |
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| CN210180583U true CN210180583U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921425696.7U Expired - Fee Related CN210180583U (en) | 2019-08-30 | 2019-08-30 | Probe type soil body pore water pressure detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877299A (en) * | 2020-08-06 | 2020-11-03 | 水利部交通运输部国家能源局南京水利科学研究院 | High-precision pore water pressure gauge based on sealing membrane |
| CN114486673A (en) * | 2022-01-04 | 2022-05-13 | 中交第四航务工程局有限公司 | In-situ pore pressure testing device and method for field vibration liquefaction test |
| CN114935907A (en) * | 2022-07-25 | 2022-08-23 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Underground space data monitoring device and monitoring system |
-
2019
- 2019-08-30 CN CN201921425696.7U patent/CN210180583U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111877299A (en) * | 2020-08-06 | 2020-11-03 | 水利部交通运输部国家能源局南京水利科学研究院 | High-precision pore water pressure gauge based on sealing membrane |
| CN114486673A (en) * | 2022-01-04 | 2022-05-13 | 中交第四航务工程局有限公司 | In-situ pore pressure testing device and method for field vibration liquefaction test |
| CN114486673B (en) * | 2022-01-04 | 2023-01-17 | 中交第四航务工程局有限公司 | In-situ pore pressure testing device and method for field vibration liquefaction test |
| CN114935907A (en) * | 2022-07-25 | 2022-08-23 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Underground space data monitoring device and monitoring system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200324 Termination date: 20210830 |
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| CF01 | Termination of patent right due to non-payment of annual fee |