CN109253941A - A kind of unsaturated soil freezing-thawing test device - Google Patents
A kind of unsaturated soil freezing-thawing test device Download PDFInfo
- Publication number
- CN109253941A CN109253941A CN201811338541.XA CN201811338541A CN109253941A CN 109253941 A CN109253941 A CN 109253941A CN 201811338541 A CN201811338541 A CN 201811338541A CN 109253941 A CN109253941 A CN 109253941A
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- China
- Prior art keywords
- iron stand
- sample box
- sample
- stand bar
- test
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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
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/60—Investigating resistance of materials, e.g. refractory materials, to rapid heat changes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0057—Generation of the force using stresses due to heating, e.g. conductive heating, radiative heating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
Abstract
The present invention is a kind of unsaturated soil freezing-thawing test device, including iron stand pedestal, the iron stand pedestal is fixedly installed with displacement sensor by supporting mechanism, and displacement sensor is electrically connected with external power supply, the upside of the iron stand pedestal is equipped with mechanism for testing, drainage mechanism is equipped between the iron stand pedestal and mechanism for testing, the mechanism for testing includes sample box, and the upside of iron stand pedestal is arranged in sample box, the inside of the sample box is equipped with sheet copper and test sample, and the upper surface of test sample and the sheet copper on the downside of displacement sensor fit closely, the sample box side wall offers vertical cut (V. cut).The invention device realizes the variable quantity of land movement and temperature measurement during the freezing-thawing test of the unsaturation soil body by the cooperation of supporting mechanism, drainage mechanism and mechanism for testing, experimental rig integrated operation is convenient and simple, greatly enhance test efficiency, all parts connection is reliable, has stronger applicability.
Description
Technical field
The present invention relates to ground the field of test technology, specially a kind of unsaturated soil freezing-thawing test device.
Background technique
There are vast ever-frozen ground and Frozen Area in China, and ever-frozen ground is mainly distributed on Qinghai-Tibet Platean and northeast size
Xing'an Mountains area, accounts for about the 25% of territory land area, and seasonal frozen soil region distribution area more very extensively, accounts for about China territory
The 53.5% of area, wherein freezing the deep severe frost zone greater than 1m is mainly distributed on these three ground of northeast, North China and northwest
Area accounts for about the 1/3 of territory total area, if considering Frozen Ground Area in short-term, China be in the national territorial area of permafrost region up to 90% with
On.
When the soil body on level of ground water is within the scope of the freeze thawing soil body, there is no filling for moisture in soil body frozen-thaw process
Divide supply, the soil body is generally in unsaturation freeze thawing state.Live original position freezing-thawing test is very long there are the test period, test influence because
The problems such as element is numerous, and experimental condition is uncontrollable.So being the effective of research soil body freeze thawing rule using indoor soil body freezing-thawing test
Approach.Therefore, the freezing-thawing test device of the indoor unsaturation soil body needs to meet the boundary condition of the original soil body, i.e. the periphery soil body
In effect of contraction and melting process, discharge effect of moisture etc..
Summary of the invention
The purpose of the present invention is to provide a kind of unsaturated soil freezing-thawing test devices, it can be good at being suitable for unsaturation
The freezing-thawing test of the soil body obtains the measuring function of the soil body temperature and corresponding displacement in frozen-thaw process, and experimental rig is easy to operate,
Usability is strong, and the simultaneous test of multiple samples under same experimental condition may be implemented.
To achieve the above object, the invention adopts the following technical scheme: a kind of unsaturated soil freezing-thawing test device, including iron
Pallet pedestal, the iron stand pedestal are fixedly installed with displacement sensor, and displacement sensor and external electricity by supporting mechanism
The upside of source electrical connection, the iron stand pedestal is equipped with mechanism for testing, the row of being equipped between the iron stand pedestal and mechanism for testing
Water dispenser structure；
The mechanism for testing includes sample box, and sample box is arranged in the upside of iron stand pedestal, the sample box it is interior
Side is equipped with sheet copper and test sample, and the upper surface of test sample and the sheet copper on the downside of displacement sensor closely paste
It closes, the sample box side wall offers vertical cut (V. cut), and the height value of vertical cut (V. cut) is greater than the height value of test sample, described perpendicular
It is equipped with temperature sensor to the inside of notch, and temperature sensor is electrically connected with external power supply.
The drainage mechanism includes cushion block, and cushion block is between sample box inner sidewall bottom surface and test sample, the examination
The bottom end of sample box offers multiple sample box drainage holes, multiple cushion block drainage holes is offered on the cushion block, and sample box drains
Hole and cushion block drainage hole are arranged in a one-to-one correspondence, and the lower surface of the sample box is fixedly installed with rhone by porous disc, and arranges
Sink is fixedly mounted on the upper surface of iron stand pedestal.
The supporting mechanism includes iron stand bar, and the iron stand bar includes lateral iron stand bar and longitudinal iron stand bar,
The two sides of the transverse direction iron stand bar are fixedly installed with cross, and the side of the transverse direction iron stand is pacified by the way that cross is fixed
Equipped with the longitudinal iron stand bar vertical with lateral iron stand bar, and longitudinal iron stand bar is fixedly mounted on the iron stand pedestal
Upper surface, the other side of the transverse direction iron stand bar are fixedly installed with and perpendicular described of transverse direction iron stand bar by cross
Displacement sensor.
Institute's displacement sensors are fixedly mounted on cross by pipe collar.
The lateral wall of the test box is equipped with graduation mark.
Displacement readings when contact of institute's displacement sensors with sheet copper are set as 0.
A kind of beneficial effect of unsaturated soil freezing-thawing test device of the present invention is:
The invention device is mainly made of supporting mechanism, drainage mechanism and mechanism for testing three parts, and supporting mechanism is real
The fixed function of integrally-built stabilization and displacement sensing is showed；Drainage mechanism realizes the migration function of water in sample melting process
Energy；Mechanism for testing realizes the transmission and recording function of data in soil body frozen-thaw process, is realized by the cooperation of three mechanisms
The variable quantity of land movement and temperature measures during the freezing-thawing test of the unsaturation soil body, and experimental rig integrated operation facilitates letter
It is single, test efficiency is greatly enhanced, all parts connection is reliable, has stronger applicability, same examination may be implemented
The simultaneous test of multiple samples under the conditions of testing.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of sample box of the present invention；
Fig. 3 is the schematic cross-sectional view of sample box of the present invention；
Fig. 4 is the schematic top plan view of sample box of the present invention；
Fig. 5 is the schematic top plan view of cushion block of the present invention；
In figure: 1, displacement sensor；2, cross；3, sheet copper；4, sample box；5, test sample；6, cushion block；7, brandreth
Platform pedestal；8, iron stand bar；81, lateral iron stand bar；82, longitudinal iron stand bar；9, porous disc；10, rhone；11, pipe collar；
12, vertical cut (V. cut)；13, sample box drainage hole；14, graduation mark；15, cushion block drainage hole.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figures 1 to 4, the present invention provides a kind of unsaturated soil freezing-thawing test device, including iron stand pedestal 7, iron
Pallet pedestal 7 is fixedly installed with displacement sensor 1 by supporting mechanism, and displacement sensor 1 is electrically connected with external power supply, brandreth
The upside of platform pedestal 7 is equipped with mechanism for testing, and drainage mechanism is equipped between iron stand pedestal 7 and mechanism for testing；
Mechanism for testing includes sample box 4, and the upside of iron stand pedestal 7 is arranged in sample box 4, and the inside of sample box 4 is set
There are sheet copper 3 and test sample 5, and the upper surface of test sample 5 and the sheet copper 3 positioned at 1 downside of displacement sensor closely paste
It closes, 4 side wall of sample box offers vertical cut (V. cut) 12, and the height value of vertical cut (V. cut) 12 is greater than the height value of test sample 5, vertically
The inside of notch 12 is equipped with temperature sensor, and temperature sensor is electrically connected with external power supply.
In the present embodiment, sheet copper 3 is fitted closely with 5 upper surface of test sample, guarantees that sheet copper 3 can be freely with survey
Have a try sample 5 change in displacement and change；The vertical cut (V. cut) 12 that 4 side of sample box opens up can be convenient temperature sensor in soil layer
Setting；The height of vertical cut (V. cut) 12 should include the height of entire test sample 5 so that it is convenient to measure 5 arbitrary height of test sample
The temperature change at place.
As shown in Figure 1 and Figure 5, drainage mechanism includes cushion block 6, and cushion block 6 is located at 4 inner sidewall bottom surface of sample box and test examination
Between sample 5, the bottom end of sample box 4 offers multiple sample box drainage holes 13, and multiple cushion block drainage holes 15 are offered on cushion block 6,
And sample box drainage hole 13 and cushion block drainage hole 15 are arranged in a one-to-one correspondence, the lower surface of sample box 4 is fixedly mounted by porous disc 9
There is rhone 10, and rhone 10 is fixedly mounted on the upper surface of iron stand pedestal 7.
In the present embodiment, the quantity of sample box drainage hole 13 and cushion block drainage hole 15 is 5,13 side of sample box drainage hole
Just moisture is constantly migrated and is discharged when test sample 5 melts；Cushion block 6 can raise entire test sample 5, while on cushion block 6
Cushion block drainage hole 15 and sample box drainage hole 13 position correspond, facilitate the row of moisture in 5 melting process of test sample
Out, the migration of moisture is hindered when preventing from melting.
As shown in Figure 1, supporting mechanism includes iron stand bar 8, iron stand bar 8 includes lateral iron stand bar 81 and longitudinal brandreth
Platform bar 82, the two sides of lateral iron stand bar 81 are fixedly installed with cross 2, and the side of lateral iron stand 81 passes through cross 2
It is fixedly installed with the longitudinal iron stand bar 82 vertical with lateral iron stand bar 81, and longitudinal iron stand bar 82 is fixedly mounted on brandreth
The other side of the upper surface of platform pedestal 7, lateral iron stand bar 81 is fixedly installed with and lateral 81 phase of iron stand bar by cross 2
Vertical displacement sensor 1.
In the present embodiment, longitudinal 82 bottom end of iron stand bar is fixedly connected with iron stand pedestal 7, prevents longitudinal iron stand bar 82
It is deformed by temperature change, the normal measurement of displacement sensor 1 is influenced, to avoid error.
As shown in Figure 1, displacement sensor 1 is fixedly mounted on cross 2 by pipe collar 11.
In the present embodiment, displacement sensor 1 is secured by pipe collar 11 and the cross 2 being fixed on lateral iron stand bar 81
Connection prevents displacement sensor 1 from loosening, and influences the measurement of displacement.
As shown in Figures 2 and 3, the lateral wall of test box 4 is equipped with graduation mark 14.
In the present embodiment, pass through the reliability of the data record of the initial reading auxiliary detection displacement sensor 1 of graduation mark 14.
As shown in Figure 1, displacement sensor 1 is set as 0 with the displacement readings when contact of sheet copper 3.
In the present embodiment, 0 is set by the displacement readings of displacement sensor 1 before test, can be convenient displacement sensing in this way
Reading numerical values when device 1 measures.
A kind of course of work of unsaturated soil freezing-thawing test device is as follows:
Firstly, supporting mechanism realizes integrally-built stabilization, and operator passes through lateral iron stand bar 81 and ten
The output end of displacement sensor 1 is directed at sheet copper 3 by cabinet frame 2, during the freezing-thawing test of the unsaturation soil body sheet copper 3 with
Land movement measures the displacement of test sample 5 and temperature by displacement sensor 1 and temperature sensor at the same time in time respectively
Variable quantity, such mechanism for testing realizes the transmission and recording function of data in soil body frozen-thaw process, then, soil body freeze thawing
Moisture is flowed in rhone 10 by sample box drainage hole 13, cushion block drainage hole 15 and the porous disc 9 of 5 downside of test sample,
It completes the discharge of moisture in entire melting process and collects process, experimental rig integrated operation is convenient and simple, largely mentions
High test efficiency.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (6)
1. a kind of unsaturated soil freezing-thawing test device, which is characterized in that including iron stand pedestal, the iron stand pedestal passes through branch
Support mechanism is fixedly installed with displacement sensor, and displacement sensor is electrically connected with external power supply, the upside of the iron stand pedestal
Equipped with mechanism for testing, drainage mechanism is equipped between the iron stand pedestal and mechanism for testing；
The mechanism for testing includes sample box, and the upside of iron stand pedestal is arranged in sample box, sets on the inside of the sample box
There are sheet copper and test sample, and the upper surface of test sample and the sheet copper on the downside of displacement sensor fit closely, institute
It states sample box side wall and offers vertical cut (V. cut), and the height value of vertical cut (V. cut) is greater than the height value of test sample, it is described vertical scarce
The inside of mouth is equipped with temperature sensor, and temperature sensor is electrically connected with external power supply.
2. a kind of unsaturated soil freezing-thawing test device according to claim 1, it is characterised in that: the drainage mechanism includes
Cushion block, and cushion block, between sample box inner sidewall bottom surface and test sample, the bottom end of the sample box offers multiple samples
Box drainage hole offers multiple cushion block drainage holes on the cushion block, and sample box drainage hole and cushion block drainage hole one-to-one correspondence are set
It sets, the lower surface of the sample box is fixedly installed with rhone by porous disc, and rhone is fixedly mounted on iron stand pedestal
Upper surface.
3. a kind of unsaturated soil freezing-thawing test device according to claim 1, it is characterised in that: the supporting mechanism includes
Iron stand bar, the iron stand bar include lateral iron stand bar and longitudinal iron stand bar, and the two sides of the transverse direction iron stand bar are equal
It is fixedly installed with cross, the side of the transverse direction iron stand is fixedly installed with vertical with lateral iron stand bar by cross
Longitudinal iron stand bar, and longitudinal iron stand bar is fixedly mounted on the upper surface of the iron stand pedestal, the transverse direction iron stand bar
The other side institute displacement sensors perpendicular with lateral iron stand bar are fixedly installed with by cross.
4. a kind of unsaturated soil freezing-thawing test device according to claim 3, it is characterised in that: institute's displacement sensors are logical
Pipe collar is crossed to be fixedly mounted on cross.
5. a kind of unsaturated soil freezing-thawing test device according to claim 1, it is characterised in that: the outside of the test box
Wall is equipped with graduation mark.
6. a kind of unsaturated soil freezing-thawing test device according to claim 1, it is characterised in that: institute's displacement sensors with
The displacement readings when contact of sheet copper are set as 0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338541.XA CN109253941A (en) | 2018-11-12 | 2018-11-12 | A kind of unsaturated soil freezing-thawing test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811338541.XA CN109253941A (en) | 2018-11-12 | 2018-11-12 | A kind of unsaturated soil freezing-thawing test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109253941A true CN109253941A (en) | 2019-01-22 |
Family
ID=65044568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811338541.XA Pending CN109253941A (en) | 2018-11-12 | 2018-11-12 | A kind of unsaturated soil freezing-thawing test device |
Country Status (1)
| Country | Link |
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| CN (1) | CN109253941A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN202486125U (en) * | 2012-01-05 | 2012-10-10 | 中国科学院寒区旱区环境与工程研究所 | Experimental device for indoor frozen soil freezing and thawing circulation process |
| CN203148869U (en) * | 2013-04-09 | 2013-08-21 | 长安大学 | Coarse-grain salty soil freeze-thaw characteristic test device |
| CN203148930U (en) * | 2013-04-09 | 2013-08-21 | 长安大学 | Coarse-grain salty soil melt-sinking characteristic test device |
| CN203287337U (en) * | 2013-06-04 | 2013-11-13 | 中国科学院寒区旱区环境与工程研究所 | Soil body freezing-thawing process visualized testing device |
| RU2586271C1 (en) * | 2015-01-12 | 2016-06-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Северный (Арктический) федеральный университет имени М.В. Ломоносова" (САФУ) | Device for determining frost boil and water permeability of soil during cyclic frost heave-thawing |
| CN205826656U (en) * | 2016-07-27 | 2016-12-21 | 长安大学 | A kind of frozen soil freeze thawing laboratory testing rig |
| CN108344850A (en) * | 2017-12-29 | 2018-07-31 | 吉林大学 | By load soil mass water-Re-power-shift assays system and method under freezing-thawing |
| CN207850876U (en) * | 2018-01-26 | 2018-09-11 | 黑龙江省水利科学研究院 | A kind of bentonite waterproof blanket test specimen tube and the apparatus for measuring permeability coefficient containing the test specimen tube |
-
2018
- 2018-11-12 CN CN201811338541.XA patent/CN109253941A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN202486125U (en) * | 2012-01-05 | 2012-10-10 | 中国科学院寒区旱区环境与工程研究所 | Experimental device for indoor frozen soil freezing and thawing circulation process |
| CN203148869U (en) * | 2013-04-09 | 2013-08-21 | 长安大学 | Coarse-grain salty soil freeze-thaw characteristic test device |
| CN203148930U (en) * | 2013-04-09 | 2013-08-21 | 长安大学 | Coarse-grain salty soil melt-sinking characteristic test device |
| CN203287337U (en) * | 2013-06-04 | 2013-11-13 | 中国科学院寒区旱区环境与工程研究所 | Soil body freezing-thawing process visualized testing device |
| RU2586271C1 (en) * | 2015-01-12 | 2016-06-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Северный (Арктический) федеральный университет имени М.В. Ломоносова" (САФУ) | Device for determining frost boil and water permeability of soil during cyclic frost heave-thawing |
| CN205826656U (en) * | 2016-07-27 | 2016-12-21 | 长安大学 | A kind of frozen soil freeze thawing laboratory testing rig |
| CN108344850A (en) * | 2017-12-29 | 2018-07-31 | 吉林大学 | By load soil mass water-Re-power-shift assays system and method under freezing-thawing |
| CN207850876U (en) * | 2018-01-26 | 2018-09-11 | 黑龙江省水利科学研究院 | A kind of bentonite waterproof blanket test specimen tube and the apparatus for measuring permeability coefficient containing the test specimen tube |
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Application publication date: 20190122 |