CN107421679A - A kind of test probe for being used to monitor frozen soil Pore Pressure - Google Patents
A kind of test probe for being used to monitor frozen soil Pore Pressure Download PDFInfo
- Publication number
- CN107421679A CN107421679A CN201710695837.6A CN201710695837A CN107421679A CN 107421679 A CN107421679 A CN 107421679A CN 201710695837 A CN201710695837 A CN 201710695837A CN 107421679 A CN107421679 A CN 107421679A
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- CN
- China
- Prior art keywords
- adapter
- pressure
- plastic conduit
- pressure sensor
- monitor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/004—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces
- G01L11/006—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces hydraulic or pneumatic counterbalancing forces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to a kind of test probe for being used to monitor frozen soil Pore Pressure, the probe includes pot clay end, plastic conduit, pressure sensor and adapter.The pressure sensor is connected with the adapter, and the adapter is connected through snap joint with one end of plastic conduit；The other end of the plastic conduit is bonded together with the pot clay end；The adapter is provided with steam vent, and the steam vent is provided with nut.The present invention is stable, reliable, easy to use, can meet to monitor the pore water pressure situation of change in Freezing Soils, so as to which the water translocation for the soil body in analysis frozen-thaw process and segregated ice process provide foundation.
Description
Technical field
The present invention relates to a kind of test equipment tested needed for soil body frozen-thaw process soil body mechanics internal variable, more particularly to one
Kind is used for the test probe for monitoring frozen soil Pore Pressure.
Background technology
Frost heave and thaw collapse are two most important diseases of cold regions engineering construction, are brought to cold regions engineering construction and its operation
Great harm.Water translocation and segregated ice are to cause frost heave and thaw collapse to deform most the underlying cause.The soil body is in freezing process
In, the soil body can form stratiform Taber ice, so as to produce frost heave.And when temperature is less than the chill point of water, the soil body still has necessarily
The water that do not freeze of amount is present, and the pore water pressure at segregated ice sharp side can produce decline, so as to cause moisture in pore water pressure ladder
Under degree via do not freeze moisture film to cold end migrate.The soil body segregates ice-out, pore water pressure increase, so as to lead in melting process
Cause soil body thaw collapse.Thus, pore water pressure is the key parameter of water translocation and segregated ice process in reflection freezing process.But
It is that the test of frozen soil Pore Pressure is always the priority and difficulty of geotechnical testament technology, relative research is less, there is presently no
Ripe frozen soil Pore Pressure method of testing, and corresponding test probe.
In soil is melted, the test of pore water pressure is typically using the method for tensometer.But in subzero temperature environment, tension force
Power transmission medium in meter（Aqueous water）Freeze, the failure of probe will be caused, thus the pore water pressure that tradition is melted in soil is surveyed
Examination technology can not be applied to the pore water pressure test in frozen soil.Therefore, in order to further explore the water of soil body frozen-thaw process
Divide migration and segregated ice mechanism, so that the effectively frost heave and thaw collapse disease of understanding, improvement and pre- cold-proof area's road, needs one kind badly
Stable, reliable, the easy to use test probe for being used to monitor frozen soil Pore Pressure.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of stabilization, reliable, easy to use are used to monitor in frozen soil
The test probe of pore water pressure.
To solve the above problems, a kind of test probe for being used to monitor frozen soil Pore Pressure of the present invention, its
It is characterised by：The probe includes pot clay end, plastic conduit, pressure sensor and adapter；The pressure sensor with it is described
Adapter is connected, and the adapter is connected through snap joint with one end of plastic conduit；The other end of the plastic conduit with
The pot clay end is bonded together；The adapter is provided with steam vent, and the steam vent is provided with nut.
The pressure sensor is connected by screw thread with the adapter.
The probe cavity that the pot clay end, the plastic conduit, the adapter and the pressure sensor are formed
It is interior to be full of alcohol.
The present invention has advantages below compared with prior art：
1st, the present invention can monitor the pore water pressure of frozen soil under the conditions of subzero temperature.In subzero temperature environment, in plastic conduit
Power transmission medium（Alcohol）It will not freeze, when reaching thermodynamical equilibrium, pore water pressure and plastic conduit in the soil body
The pressure of interior alcohol keeps balance, can know the pore water of inside soil body so as to test the pressure of alcohol via pressure sensor
Pressure.
2nd, clay area of bed in front end of the present invention is smaller, can meet the test job of laboratory test, and easy to use.Pot clay end
If size is too big, it is placed into soil sample, the original structure of the soil body can be destroyed, influence freezing-thawing test effect；In addition laboratory test
Sample it is typically small, the relatively smaller measuring accuracy of size of probe is higher.
3rd, the pot clay end of front end of the present invention plays a part of pellicle, and it allows moisture to pass through in the range of certain pressure
Without allowing alcohol, gas by the way that such alcohol cannot pass freely through pot clay end into soil sample so as to disturb the part of soil sample
Moisture field and the field of force；Gas in the soil body, which can not enter probe, which destroys thermodynamical equilibrium, causes probe to fail.
4th, the present invention is stable, reliable, easy to use, can meet to monitor the pore water pressure change feelings in Freezing Soils
Condition, so as to which the water translocation for the soil body in analysis frozen-thaw process and segregated ice process provide foundation.
Brief description of the drawings
The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of the present invention.
In figure：1- pot clay ends；2- plastic conduits；3- snap joints；4- nuts；5- pressure sensors；6- adapters.
Embodiment
It is used to monitoring the test probe of frozen soil Pore Pressure as shown in figure 1, a kind of, the probe includes pot clay end 1, hard
Matter plastic tube 2, pressure sensor 5 and adapter 6.Pressure sensor 5 is connected with adapter 6, and the adapter 6 is through snap joint 3
It is connected with one end of plastic conduit 2；The other end of plastic conduit 2 is bonded together with pot clay end 1；Adapter 6 is provided with
Steam vent, the steam vent are provided with nut 4.
Wherein：Pressure sensor 5 is connected by screw thread with adapter 6.
Alcohol is full of in the probe cavity that pot clay end 1, plastic conduit 2, adapter 6 and pressure sensor 5 are formed.
The job step of the present invention：
(1) saturation before testing：
Alcohol is injected into the plastic conduit 2 with pot clay end 1, plastic conduit 2 through snap joint 3 and adapter after filling
6 connections, then then pressure sensor 5 is connected through screw thread with adapter 6 again, had therebetween toward alcohol is injected in adapter 6 again
Sealing gasket, middle hole of now popping one's head in is entirely alcohol filling, and nut 4 finally is screwed on into sealing, stands saturation for a period of time, hair
There is no bubble now.
During standing, pot clay end 1 is placed in degassing distilled water, is avoided contacting with gas, is led in order to avoid influenceing its water guide
Smooth property.
(2) bubble is vented in testing：
By in the 1 fully-inserted soil body of pot clay end during experiment, fully contact with the soil body, seen by transparent plastic conduit 2
Whether wherein have bubble generation, if bubble, back out nut 4 and be vented by steam vent, then reinject alcohol if examining；If not yet
There is bubble, probe can be applied.
(3) pot clay end 1 and part rigid rubber pipe 2 are inserted inside experiment soil sample, pressure sensor 5 is adopted instrument with number and is connected, i.e.,
Experiment can be carried out.
(4) experiment post processing：
It is noted that cleaning the soil body on pot clay end 1 after experiment, in order to avoid the soil body causes the blocking of pot clay end 1 after drying, handle has been cleaned
Pot clay end 1 is placed in clear water, in order to avoid the drying shrinkage fracturing of pot clay end 1.
(5) the pore water pressure determined by pressure sensor 5 can be used to water translocation and ice in analytical soil sample frozen-thaw process
Segregation process.
Claims (3)
- A kind of 1. test probe for being used to monitor frozen soil Pore Pressure, it is characterised in that：The probe includes pot clay end（1）、 Plastic conduit（2）, pressure sensor（5）And adapter（6）；The pressure sensor（5）With the adapter（6）It is connected, The adapter（6）Through snap joint（3）With plastic conduit（2）One end be connected；The plastic conduit（2）The other end with The pot clay end（1）It is bonded together；The adapter（6）Steam vent is provided with, the steam vent is provided with nut（4）.
- A kind of 2. test probe for being used to monitor frozen soil Pore Pressure as claimed in claim 1, it is characterised in that：It is described Pressure sensor（5）Pass through screw thread and the adapter（6）It is connected.
- A kind of 3. test probe for being used to monitor frozen soil Pore Pressure as claimed in claim 1, it is characterised in that：It is described Pot clay end（1）, the plastic conduit（2）, the adapter（6）And the pressure sensor（5）The probe cavity of formation It is interior to be full of alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710695837.6A CN107421679A (en) | 2017-08-15 | 2017-08-15 | A kind of test probe for being used to monitor frozen soil Pore Pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710695837.6A CN107421679A (en) | 2017-08-15 | 2017-08-15 | A kind of test probe for being used to monitor frozen soil Pore Pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107421679A true CN107421679A (en) | 2017-12-01 |
Family
ID=60438106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710695837.6A Pending CN107421679A (en) | 2017-08-15 | 2017-08-15 | A kind of test probe for being used to monitor frozen soil Pore Pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107421679A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239188A (en) * | 2018-09-18 | 2019-01-18 | 天津大学 | A kind of bottom sediment ultrasonic device for measuring and its ultrasonic measurement method |
| CN112251265A (en) * | 2020-10-21 | 2021-01-22 | 中国科学院西北生态环境资源研究院 | Method for forming hydrate by clay medium |
| CN113739984A (en) * | 2021-08-18 | 2021-12-03 | 中国科学院西北生态环境资源研究院 | Device for measuring frozen soil pore water pressure change |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4453401A (en) * | 1982-03-12 | 1984-06-12 | The United States Of America As Represented By The Secretary Of The Air Force | Pressure sensor and soil stress isolation filter arrangement in a pore pressure probe |
| CN102590468A (en) * | 2011-11-29 | 2012-07-18 | 中国科学院寒区旱区环境与工程研究所 | Testing system for deep soil freezing/thawing process |
| WO2012141460A2 (en) * | 2011-04-11 | 2012-10-18 | (주)엘지하우시스 | Apparatus for measuring the degree of vacuum of a multistage vacuum heat-insulating member, and measurement method using same |
| CN202599591U (en) * | 2012-04-18 | 2012-12-12 | 苏州筑邦测控科技有限公司 | Pore water pressure measuring device |
| CN202836859U (en) * | 2012-10-10 | 2013-03-27 | 基康仪器(北京)有限公司 | Measurement device for frozen earth pore water pressure |
| CN103512699A (en) * | 2012-06-21 | 2014-01-15 | 中国科学院寒区旱区环境与工程研究所 | Device for measuring pore water pressure in frozen soil |
-
2017
- 2017-08-15 CN CN201710695837.6A patent/CN107421679A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4453401A (en) * | 1982-03-12 | 1984-06-12 | The United States Of America As Represented By The Secretary Of The Air Force | Pressure sensor and soil stress isolation filter arrangement in a pore pressure probe |
| WO2012141460A2 (en) * | 2011-04-11 | 2012-10-18 | (주)엘지하우시스 | Apparatus for measuring the degree of vacuum of a multistage vacuum heat-insulating member, and measurement method using same |
| CN102590468A (en) * | 2011-11-29 | 2012-07-18 | 中国科学院寒区旱区环境与工程研究所 | Testing system for deep soil freezing/thawing process |
| CN202599591U (en) * | 2012-04-18 | 2012-12-12 | 苏州筑邦测控科技有限公司 | Pore water pressure measuring device |
| CN103512699A (en) * | 2012-06-21 | 2014-01-15 | 中国科学院寒区旱区环境与工程研究所 | Device for measuring pore water pressure in frozen soil |
| CN202836859U (en) * | 2012-10-10 | 2013-03-27 | 基康仪器(北京)有限公司 | Measurement device for frozen earth pore water pressure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239188A (en) * | 2018-09-18 | 2019-01-18 | 天津大学 | A kind of bottom sediment ultrasonic device for measuring and its ultrasonic measurement method |
| CN112251265A (en) * | 2020-10-21 | 2021-01-22 | 中国科学院西北生态环境资源研究院 | Method for forming hydrate by clay medium |
| CN113739984A (en) * | 2021-08-18 | 2021-12-03 | 中国科学院西北生态环境资源研究院 | Device for measuring frozen soil pore water pressure change |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171201 |
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| RJ01 | Rejection of invention patent application after publication |