CN110553973A - Pore pressure measuring device and measuring system - Google Patents
Pore pressure measuring device and measuring system Download PDFInfo
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- CN110553973A CN110553973A CN201910955309.9A CN201910955309A CN110553973A CN 110553973 A CN110553973 A CN 110553973A CN 201910955309 A CN201910955309 A CN 201910955309A CN 110553973 A CN110553973 A CN 110553973A
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- 239000011148 porous material Substances 0.000 title claims abstract description 64
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 24
- 238000012806 monitoring device Methods 0.000 claims description 9
- 238000009530 blood pressure measurement Methods 0.000 abstract description 8
- 238000009434 installation Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 239000002689 soil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000009933 burial Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
the invention provides a pore pressure measuring device and a pore pressure measuring system, which belong to the field of pore pressure measurement, wherein the measuring device comprises a first shell, an inflation pressure stabilizing component, a first sensor, a second sensor and a data acquisition control module; a back pressure cabin is arranged in the first shell, and the inflation pressure stabilizing assembly is arranged in the back pressure cabin; the first sensor is arranged in the first shell and used for detecting the pressure in the back pressure cabin; the second sensor is used for detecting the pressure difference between the back pressure cabin and the outside; the data acquisition control module is used for calculating corresponding pressure values and pressure difference values; this measuring device can ensure higher measurement resolution ratio when higher range, can predict pressure value adjustment before the installation and aerify the pressure of steady voltage subassembly, and then the operating pressure scope in the adjustment backpressure cabin realizes stabilizing the backpressure pressure source, has solved and has detected the unusual problem of effective pressure fluctuation under the higher pore pressure condition, effectively improves measuring precision and pore pressure measuring's application ability.
Description
Technical Field
the invention relates to the field of pore pressure measurement, in particular to a pore pressure measuring device and a pore pressure measuring system.
background
The pore pressure measurement is a method for measuring water pressure in soil layers and rock layers, a sensor is buried in a soil body, water permeating in the soil body acts on the sensor to measure the pressure of the sensor, the pore pressure measurement is commonly used for monitoring pore water of rock soil bodies such as landslides and debris flows, the deep hole pore pressure measurement is also used for researching earthquake activities, and the pore water pressure is one of the frequently observed projects in geotechnical engineering construction and research.
The existing pore pressure measuring scheme is the same as the general water pressure measurement, but the difference is that a permeable stone is arranged at the water inlet of the sensor, the water permeability is close to the measured soil body for isolating impurities, the measuring characteristic of the sensor is consistent with the output characteristic of a common pressure sensor, and the typical output of the sensor is in a linear relation.
CECS 55: 93 & ltpore water pressure test regulation & gt, the proposal that in order to guarantee the precision of the pore water pressure meter, the selected measuring range is not too large, and the upper limit value is larger than the sum of the hydrostatic pressure value and the estimated excess pore water pressure value and is preferably 100-200 kPa.
the precision of the current pressure sensor is about 0.1% of the full range, and when the range of the sensor is increased, the precision of the sensor is reduced; for higher hydrostatic pressure at deeper burial depth, a pore pressure meter with a larger range must be selected, so that the measurement precision is reduced, and a pressure signal with smaller change cannot be measured.
Disclosure of Invention
The invention aims to provide a pore pressure measuring device, which can detect a pressure signal with small change when the pore pressure measuring device is deeply buried, effectively improve the measuring precision and provide more accurate basic data for scientific research work such as geology, disaster prevention and the like.
in view of the above object, the present invention provides a pore pressure measuring device, including: the device comprises a first shell, an inflation pressure stabilizing component, a first sensor, a second sensor and a data acquisition control module;
A back pressure cabin is arranged inside the first shell;
the inflation pressure stabilizing assembly is arranged in the back pressure cabin, and the volume of the air part in the back pressure cabin is ensured by adjusting the air pressure of the inflation pressure stabilizing assembly in the back pressure cabin, so that the pressure in the back pressure cabin is ensured to be stable, and the stability of data acquisition is improved;
The first sensor is arranged inside the first shell and used for detecting the pressure in the back pressure cabin;
One end of the second sensor extends into the backpressure cabin in the first shell, and the other end of the second sensor extends out of the first shell and is used for detecting the pressure difference between the backpressure cabin and the outside;
The data acquisition control module is used for acquiring a pressure signal detected by the first sensor and calculating a basic pressure value according to the pressure signal; and the data acquisition control module acquires the pressure difference signal detected by the second sensor, calculates a pressure difference value according to the pressure difference signal, and combines the two pressure values to obtain a high-precision pore pressure value so as to provide more accurate basic data for scientific research work such as geology, disaster prevention and the like.
Furthermore, a pipeline for communicating the back pressure cabin with the outside is arranged on the first shell; the pipeline is communicated with a control valve, and the control valve is electrically connected with the data acquisition control module.
further, the data acquisition control module is suitable for judging whether the pressure difference value is within a preset pressure difference threshold range;
if the pressure difference value exceeds the preset pressure difference threshold range, the data acquisition control module controls the control valve to open so that the back pressure cabin is communicated with the outside;
and if the pressure difference value is within the preset pressure difference threshold range, the data acquisition control module controls the control valve to be closed, so that the back pressure cabin is isolated from the outside. The second sensor is ensured to be in a good working state, and the sensor is prevented from being damaged.
Further, the data acquisition control module is also used for calculating a pore pressure value according to the basic pressure value and the pressure difference signal.
Further, the inflation pressure stabilizing assembly comprises an air bag, and an inflation head of the air bag extends out of the first shell.
Further, the first sensor is a pressure sensor, and the second sensor is a differential pressure sensor.
Furthermore, a plurality of first assembling holes are formed in the first shell, and the first sensor, the second sensor, the inflating head of the air bag and the pipeline are assembled in the corresponding first assembling holes.
Further, the intelligent monitoring device comprises a second shell, an instrument cabin is arranged in the second shell, the first sensor, the second sensor and the data acquisition control module are arranged in the instrument cabin, and the second sensor and the end part of the pipeline extend out of the second shell.
furthermore, a plurality of second assembling holes are formed in the second shell, and the second sensor and the pipeline are assembled in the corresponding second assembling holes.
The invention also provides a pore pressure measuring system which comprises a data monitoring device and the pore pressure measuring device, wherein the data monitoring device is electrically connected with the data acquisition control module through a signal wire.
by adopting the technical scheme, the pore pressure measuring device provided by the invention has the technical effects that:
a back pressure cabin is arranged in the first shell, the inflation pressure stabilizing assembly is arranged in the back pressure cabin, and the working pressure range in the back pressure cabin can be adjusted by using the inflation pressure stabilizing assembly; the first sensor is used for detecting the pressure in the back pressure chamber and can acquire the basic condition of pore pressure; the second sensor is used for detecting the pressure difference between the back pressure cabin and the outside; the data acquisition control module is used for calculating corresponding pressure values and pressure difference values so as to conveniently acquire the change condition of the pore pressure;
The output sensitivity of the pore pressure measuring device provided by the invention is irrelevant to the measuring range, and higher measuring resolution can still be ensured in a higher range, the pressure of the inflatable pressure stabilizing component can be adjusted by predicting the pressure value before installation, so that the pressure stabilizing range in the backpressure cabin is adjusted, the backpressure pressure source is stabilized, the problem of detecting the abnormal effective pressure fluctuation under the condition of higher pore pressure is solved, and the application capability of pore pressure measurement is improved. Particularly, when the buried depth is deeper, the pressure signal with small change can be detected, the measurement precision is effectively improved, and more accurate basic data is provided for scientific research work such as geology, disaster prevention and the like.
The pore pressure measuring system provided by the invention comprises the pore pressure measuring device and has the characteristics of a data monitoring device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a pore pressure measuring device according to a first embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a first housing according to a first embodiment of the invention;
FIG. 3 is a schematic structural diagram of a pore pressure measuring device according to a first embodiment of the present invention;
Fig. 4 is a schematic structural diagram of a second housing according to a first embodiment of the invention;
Fig. 5 is a schematic diagram of a pore pressure measuring device according to a first embodiment of the invention.
Reference numerals: 100-first housing, 110-ballast compartment, 120-first assembly hole, 200-inflatable pressure stabilizing assembly, 210-airbag, 211-inflation head, 300-first sensor, 400-second sensor, 500-data acquisition control module, 600-tubing, 700-control valve, 800-second housing, 810-instrument compartment, 820-second assembly hole.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
in the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
example one
As shown in fig. 1 and 2, the pore pressure measuring device provided by the present invention includes: the first housing 100, the inflation pressure stabilizing assembly 200, the first sensor 300, the second sensor 400, and the data acquisition control module 500.
The first casing 100 is provided inside with a back pressure cabin 110; the inflation pressure stabilizing assembly 200 is arranged in the back pressure cabin 110, and the volume of the inflation pressure stabilizing assembly 200 is changed by inflating the inflation pressure stabilizing assembly 200, so as to adjust the working pressure range in the back pressure cabin 110;
The first sensor 300 is disposed inside the first casing 100 to detect the pressure inside the back pressure cabin 110;
One end of the second sensor 400 extends into the back pressure compartment 110 in the first housing 100, and the other end extends outside the first housing 100, for detecting a pressure difference between the back pressure compartment 110 and the outside;
the data acquisition control module 500 is electrically connected with the first sensor 300 and the second sensor 400 respectively, and the data acquisition control module 500 is used for acquiring a pressure signal detected by the first sensor 300, calculating a base pressure value according to the pressure signal and facilitating a worker to acquire base pressure data;
meanwhile, the data acquisition control module is further configured to acquire a pressure difference signal detected by the second sensor 400, and calculate a pressure difference value according to the pressure difference signal, so that the pressure difference between the inside of the back pressure cabin 110 and the outside is conveniently adjusted in application, and further, a higher measurement resolution can still be ensured in a higher range.
The working pressure range in the back ballast 110 refers to a common pressure range of gas and water in the back ballast 110 when the pore pressure measuring device works in the soil;
in addition, since the second sensor 400 is dedicated to measure and detect the pressure difference change between the back ballast 110 and the outside, and the range of the second sensor 400 is small, the first sensor 300 is required to detect the value of the base pressure in the back ballast 110 during the application, so as to adjust the pressure sensing range of the pore pressure measuring device.
According to the pore pressure measuring device provided by the embodiment of the invention, the first shell 100 is internally provided with the back pressure cabin 110, the inflation pressure stabilizing component 200 is arranged in the back pressure cabin 110, and the working pressure range in the back pressure cabin 110 can be adjusted by utilizing the inflation pressure stabilizing component 200, so that the pressure stability in the back pressure cabin 110 is ensured, and the stability of data acquisition is improved; the first sensor 300 is connected to the first housing 100 for detecting the pressure in the back pressure chamber 110, so as to obtain the value of the base pressure in the back pressure chamber 110 for research by researchers; the second sensor 400 is used to detect a pressure difference between the back ballast 110 and the outside; the data acquisition control module is used for calculating corresponding pressure values and pressure difference values.
The output sensitivity of the pore pressure measuring device provided by the embodiment of the invention is irrelevant to the measuring range, and can still ensure higher measuring resolution in a higher range, the pressure of the inflatable pressure stabilizing assembly 200 can be adjusted according to the estimated pressure value of a working site before installation, so that the working pressure range in the back pressure cabin 110 can be adjusted, the stable back pressure source can be realized, the problem of detecting the abnormal effective pressure fluctuation under the condition of higher pore pressure can be solved, the measuring quality can be ensured, and the application capability of pore pressure measurement can be improved.
In an optional embodiment of the invention, the data acquisition control module is further configured to calculate a pore pressure value according to the base pressure value and the pressure difference signal, so that scientific researchers can conveniently obtain higher-precision pore pressure data.
In an alternative embodiment of the present invention, first sensor 300 is a pressure sensor and second sensor 400 is a differential pressure sensor.
Referring to fig. 5, in order to adjust the pressure difference between the back ballast 110 and the outside, in an alternative embodiment of the present invention, a pipe 600 for communicating the back ballast 110 and the outside is provided on the first casing 100; the pipeline 600 is communicated with a control valve 700, the control valve 700 is electrically connected with the data acquisition control module 500, and the data acquisition control module 500 is used for controlling the control valve 700 to open or close, so that the backpressure cabin 110 is communicated with the outside or isolated. For example, when the back ballast 110 is in communication with the outside, the pressure differential between the back ballast 110 and the outside may be adjusted.
the pore pressure measuring device provided by the embodiment of the invention can adjust the pressure of the inflatable pressure stabilizing assembly 200 according to the estimated pressure value of the working site before installation, thereby adjusting the pressure in the back pressure cabin 110.
The data collection control module 500 regulates the pressure difference between the back pressure compartment 110 and the outside by using the following method:
The data acquisition control module 500 is adapted to determine whether the pressure difference value is within a preset pressure difference threshold range;
If the pressure difference value exceeds the maximum value within the preset pressure difference threshold range, the data acquisition control module 500 controls the control valve 700 to open, so that the back pressure cabin 110 is communicated with the outside, an external water source enters the back pressure cabin 110, and the back pressure cabin 110 is depressurized or pressurized until the pressure difference value is within the preset pressure difference threshold range;
If the pressure difference value is within the preset pressure difference threshold range, the data acquisition control module 500 controls the control valve 700 to close, so that the back ballast 110 is kept in the isolation device with the outside.
through the adjusting mode, the pressure sensing range can be adjusted during application, for example, the specially designed measuring range is 6-7 MPa instead of the traditional 0-7 MPa.
In an alternative embodiment of the present invention, the inflatable pressure stabilizing assembly 200 includes an air bag 210, an inflation head 211 of the air bag 210 extends to the outside of the first housing 100, the air bag 210 is inflated through the inflation head 211, and the pressure in the back pressure chamber 110 is adjusted by the volume change of the air bag 210.
Referring to fig. 2, in order to facilitate assembly of the inflation head 211, the first sensor 300, the second sensor 400, and the tube 600, a plurality of first assembly holes 120 are provided on the first housing 100, and the first sensor 300, the second sensor 400, the inflation head 211 of the airbag, and the tube 600 are respectively assembled in the corresponding first assembly holes 120. The respective components are sealed with the first fitting hole 120 by a sealing member.
Referring to fig. 3 and 4, in an alternative embodiment of the present invention, the pore pressure measuring apparatus further includes a second housing 800, an instrument chamber 810 is disposed in the second housing 800, the first housing 100, the first sensor 300, the second sensor 400, and the data acquisition control module 500 are disposed in the instrument chamber 810, and the instrument chamber 810 plays a role in protecting the above components. The ends of the second sensor 400 and the duct 600 extend outside the second casing 800, and the second sensor 400 and the duct 600 are communicated with the outside.
Referring to fig. 4, in an alternative embodiment of the present invention, a plurality of second fitting holes 820 are formed in the second housing 800, and the second sensor 400 and the pipe 600 are fitted into the corresponding second fitting holes 820, so that the external pressure can be detected.
Example two
the embodiment of the invention provides a pore pressure measuring system which comprises a data monitoring device and the pore pressure measuring device provided by the embodiment.
since the structure of the pore pressure measuring device has been described in one embodiment, it is not described in detail in this embodiment;
The data monitoring device is electrically connected with the data acquisition control module through a signal line, and can acquire the basic pressure value, the pressure difference value and the pore pressure value calculated by the data acquisition control module, so that the data monitoring device is convenient for workers to monitor.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A pore pressure measuring device, comprising: the device comprises a first shell, an inflation pressure stabilizing component, a first sensor, a second sensor and a data acquisition control module;
A back pressure cabin is arranged inside the first shell;
The inflation pressure stabilizing assembly is arranged in the back pressure cabin and is used for adjusting the working pressure range in the back pressure cabin;
The first sensor is arranged inside the first shell and used for detecting the pressure in the back pressure cabin;
One end of the second sensor extends into the back pressure cabin, and the other end of the second sensor extends out of the first shell and is used for detecting the pressure difference between the back pressure cabin and the outside;
The data acquisition control module is used for acquiring a pressure signal detected by the first sensor and calculating a basic pressure value according to the pressure signal; and the data acquisition control module acquires the pressure difference signal detected by the second sensor and calculates a pressure difference value according to the pressure difference signal.
2. The pore pressure measuring device according to claim 1, wherein a pipe for communicating the back pressure cabin with the outside is provided on the first housing;
the pipeline is communicated with a control valve, and the control valve is electrically connected with the data acquisition control module.
3. the pore pressure measuring device according to claim 2, wherein the data acquisition control module is adapted to determine whether the pressure difference value is within a preset pressure difference threshold range;
if the pressure difference value exceeds the preset pressure difference threshold range, the data acquisition control module controls the control valve to open so that the back pressure cabin is communicated with the outside;
And if the pressure difference value is within the preset pressure difference threshold range, the data acquisition control module controls the control valve to be closed, so that the back pressure cabin is isolated from the outside.
4. the pore pressure measuring device of claim 1, wherein the data acquisition control module is further configured to calculate a pore pressure value from the base pressure value and the pressure difference signal.
5. The pore pressure measuring device of claim 2, wherein the inflation pressure stabilizing assembly comprises an air bag, an inflation head of the air bag protruding outside the first housing.
6. The pore pressure measuring device of claim 1, wherein the first sensor is a pressure sensor and the second sensor is a differential pressure sensor.
7. The pore pressure measuring device according to claim 5, wherein the first housing is provided with a plurality of first fitting holes, and the first sensor, the second sensor, the inflation head of the air bag, and the pipe are fitted in the corresponding first fitting holes.
8. The pore pressure measuring device according to claim 2, further comprising a second housing, wherein an instrument chamber is disposed in the second housing, the first sensor, the second sensor and the data acquisition control module are disposed in the instrument chamber, and the second sensor and the end of the pipe each extend out of the second housing.
9. The pore pressure measuring device according to claim 8, wherein a plurality of second fitting holes are provided on the second housing, and the second sensor and the pipe are fitted in the corresponding second fitting holes.
10. A pore pressure measuring system, which is characterized by comprising a data monitoring device and the pore pressure measuring device as claimed in any one of claims 1 to 9, wherein the data monitoring device is electrically connected with the data acquisition control module through a signal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910955309.9A CN110553973A (en) | 2019-10-09 | 2019-10-09 | Pore pressure measuring device and measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910955309.9A CN110553973A (en) | 2019-10-09 | 2019-10-09 | Pore pressure measuring device and measuring system |
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| CN110553973A true CN110553973A (en) | 2019-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910955309.9A Pending CN110553973A (en) | 2019-10-09 | 2019-10-09 | Pore pressure measuring device and measuring system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86208798U (en) * | 1986-11-07 | 1987-09-09 | 国家地震局地壳应力研究所 | Pressure-differential pore gauge with adjustable range |
| CN201732048U (en) * | 2010-06-01 | 2011-02-02 | 新疆北新路桥建设股份有限公司 | Porous concrete water permeability testing instrument |
| CN103471976A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院广州能源研究所 | Device for measuring permeability of porous deposit sediments containing hydrates |
| CN105547963A (en) * | 2016-01-13 | 2016-05-04 | 长沙理工大学 | Simulation testing device and method for bituminous pavement pore water pressure |
| CN210626279U (en) * | 2019-10-09 | 2020-05-26 | 中国地质科学院地质力学研究所 | Pore pressure measuring device and measuring system |
-
2019
- 2019-10-09 CN CN201910955309.9A patent/CN110553973A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86208798U (en) * | 1986-11-07 | 1987-09-09 | 国家地震局地壳应力研究所 | Pressure-differential pore gauge with adjustable range |
| CN201732048U (en) * | 2010-06-01 | 2011-02-02 | 新疆北新路桥建设股份有限公司 | Porous concrete water permeability testing instrument |
| CN103471976A (en) * | 2013-09-18 | 2013-12-25 | 中国科学院广州能源研究所 | Device for measuring permeability of porous deposit sediments containing hydrates |
| CN105547963A (en) * | 2016-01-13 | 2016-05-04 | 长沙理工大学 | Simulation testing device and method for bituminous pavement pore water pressure |
| CN210626279U (en) * | 2019-10-09 | 2020-05-26 | 中国地质科学院地质力学研究所 | Pore pressure measuring device and measuring system |
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