CN102156076B - Method for measuring freeze thawing deformation of one-dimensional lateral limit loaded soil sample - Google Patents
Method for measuring freeze thawing deformation of one-dimensional lateral limit loaded soil sample Download PDFInfo
- Publication number
- CN102156076B CN102156076B CN 201110070078 CN201110070078A CN102156076B CN 102156076 B CN102156076 B CN 102156076B CN 201110070078 CN201110070078 CN 201110070078 CN 201110070078 A CN201110070078 A CN 201110070078A CN 102156076 B CN102156076 B CN 102156076B
- Authority
- CN
- China
- Prior art keywords
- sample
- freeze thawing
- controlled valve
- downcomer
- water tank
- Prior art date
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a method for measuring freeze thawing deformation of a one-dimensional lateral limit loaded soil sample by using a testing device. The device comprises a heating water tank 1, a loading framework 8, an evaporator 14, a freeze thawing chamber 17, a sample box 19, a weight 24 and a pressing lever 28. The heating water tank 1 is connected with freeze thawing chamber 17 through a lower water pipe 5 and an upper water pipe 6, the lower water pipe 5 is controlled by a switching valve 3, and the upper water pipe 6 is controlled by a water pump 2 and a switching valve 4. The device is simple to manufacture, has high measurement precision, meets the freezing and thawing requirements of the soil sample, is accurate to control temperature, and can be used for measuring expansion and shrinkage quantity and volume change of various frozen and thawed soils under a vertical load lateral limit pressure environment in the civil engineering.
Description
Technical field
The present invention is a kind of geotechnological method of testing, belongs to building (ground) field of engineering technology.
Background technology
For a long time, frost heave and thaw collapse are the one of the main reasons of cold district, northwest engineering freeze injury problem always.The frost heave of the soil body and the cyclic process of thaw collapse have been changed soil structures, having destroyed intergranular connection power, soil particle is rearranged, is to cause one of deteriorated major reason of soil mass property, especially have the soil body than strong constitutive property for the frozen soil in cold district and loess etc., all the more so.The soil property structures such as earth dam, dyke, roadbed, side slope produce the disaster accidents such as crack, seepage, landslide under long-term frost heave, the impact of thaw collapse cyclical factor, had a strong impact on normal construction and the safe operation of engineering.Therefore, to the soil body freeze at low temperatures with high temperature under the understanding research of cubic deformation rule under the ringing that melts very necessary.Also there is no at present the comparatively ripe test method that is used for measuring the swell-shrinking deformation rule of the soil body under confining pressure both at home and abroad.This application to invent exactly a kind of for the soil body under sharp freezing and high temperature melt environment, the body variable survey method under the pressure at right angle effect.
Summary of the invention
The object of the invention is to provide a kind of test method for measuring repeated expansion and shrinkage of soil sample, solve the perpendicular displacement amount and the measurement problem of cubic deformation amount of the soil body when repeatedly expanding or shrinking, be particularly useful for freezing soil and expand and the breathing measurement problem of melting in contraction process.
Technical solution of the present invention is characterized in that utilizing the distortion of a kind of test unit measuring repeated expansion and shrinkage of soil sample, and this test unit comprises heating water tank 1, loading frame 8, evaporator 14, freeze thawing chamber 17, pressurization lever 28.Wherein heating water tank 1 is connected with upper hose by downcomer 5 and is connected with freeze thawing chamber 17, and downcomer 5 is controlled by controlled valve 3, and upper hose 6 is by water pump 2 and controlled valve 4 controls.Evaporator 14 connects into a cover refrigeration system with cold-producing medium Storage Box 13, compressor 16, condenser 15, cold-producing medium Storage Box 13.Sample box 19 bottoms are placed with permeable stone 12, place sample 20 above permeable stone 12, put again a permeable stone 12 above sample 20, then cover permeable stone 12 with top cap 11, by 20 pressurizations of 10 pairs of samples of pressuring shaft, can change by vertical displacement meter 9 observed readings when breathing occurs sample 20.Polytene heat-insulation foam 18 and thermometer 7 are arranged in freeze thawing chamber 17, and thermometer 7 is connected with vertical displacement meter and can be connected computer and realize real-time data collection.Pressuring shaft 10 provides pressure at right angle by loading frame 8 by pressurization lever 28 and the counterweight 24 that gim peg 22 connects.Loading frame 8 is comprised of rotation axis 23, counterweight 24, large counterweight 27, pressurization lever 28, loading frame 8 is connected with instrument base 21 by gim peg 22, two rotation axiss 23 that drive framework 8 liftings connect by the first metal lift hook 25, and counterweight 24 is connected by the second metal lift hook 26 with lever 28.
Advantage of the present invention:
Instrument manufacturing is simple, and measuring accuracy is high, satisfies that soil sample is freezed, the thaw collapse requirement, and breathing amount and body variable various soil properties are freezed thaw collapse under confining pressure after can be directly measured in the temperature precise control.
The scope of application of the present invention:
The breathing amount of the various soil properties that can be used for running in civil engineering work and volume change thereof measure, and both have been applicable to without measuring under load pressure free to contract and expand environment, are applicable to again measure under the confining pressure environment of vertical load.
Description of drawings:
Fig. 1 is for the test unit structural representation of measuring repeated expansion and shrinkage of soil sample.Wherein: heating water tank 1, water pump 2, downcomer controlled valve 3, upper hose controlled valve 4, downcomer 5, upper hose 6, thermometer 7, loading frame 8, vertical displacement meter 9, pressuring shaft 10, top cap 11, permeable stone 12, cold-producing medium Storage Box 13, evaporator 14, condenser 15, compressor 16, freeze thawing chamber 17, polytene heat-insulation foam 18, sample box 19, sample 20, instrument base 21, gim peg 22, rotation axis 23, counterweight 24 are arranged.
Fig. 2 is the A-A right view of Fig. 1.Wherein have: gim peg 22, rotation axis 23, counterweight 24, the first metal lift hook 25, the second metal lift hook 26, large counterweight 27, pressurization lever 28.
Embodiment:
Embodiment: the test method that is used for repeated expansion and shrinkage of soil sample under measurement lateral confinement perpendicular stress condition is as follows:
1. sample is installed: first permeable stone 12 is put into sample box 19, then put into sample 20, put into permeable stone 12, the top adds caping cap 11 again, and pressuring shaft 10 is aimed at top cap 11, counterweight 24 is placed on below the second metal lift hook 26, by loading frame 8, make pressuring shaft 10 aim at top cap 11, sample 20 is applied authorised pressure, and vertical displacement meter 9 is placed on top cap 11, reading is made zero;
2. freeze sample: start compressor 16, make cold-producing medium 13 by condenser 15, enter in evaporator 14, sample 20 is carried out frozen cooling, by the temperature of thermometer 7 Control Assays 20, treat that temperature reaches testing requirements, close compressor 16, by the measurement of vertical displacement meter 9, can draw the freezing expansion amount of sample 20 at regulation pressure at right angle and temperature;
3. melt sample: start heating water tank 1, open downcomer controlled valve 3, hot water flows in freeze thawing chamber 17 by downcomer 5, then valve-off 3, sample 20 after freezing is heated, after heat is transmitted, as do not reach the temperature of testing requirements, can open upper hose valve 4, open water pump 2, water in freeze thawing chamber 17 are drawn back heating water tank 1, then valve-off 4, again the heating of the water in water tank 1, and then open valve 3, allow hot water flow in freeze thawing chamber 17, valve-off 3, sample 20 after freezing is heated again, when thermometer 7 reaches the temperature of testing requirements, but stopped heating, open simultaneously valve 4, start water pump 2, water is drawn back water tank 1, then valve-off 4, can observe simultaneously the reading of vertical displacement meter 9, draw the thawing amount of contraction of sample 20 at regulation pressure at right angle and temperature,
4. as the breathing volume change of carrying out after the sample multigelation measure, can repeating step 2. 3., and read the volume swell-shrinking deformation amount of sample 20 at regulation pressure at right angle and temperature from vertical displacement meter 9.
Claims (1)
1. the method for measurement of a lateral confinement vertical loading soil sample freeze thawing deformation, it is characterized in that utilizing a kind of test unit to measure soil sample freeze thawing deformation, this device comprises heating water tank (1), loading frame (8), evaporator (14), freeze thawing chamber (17), pressurization lever (28), heating water tank (1) is connected 6 by downcomer (5) with upper hose) be connected with freeze thawing chamber (17), downcomer (5) is controlled by downcomer controlled valve (3), upper hose (6) is controlled by water pump (2) and upper hose controlled valve (4), evaporator (14) and cold-producing medium Storage Box (13), compressor (16), condenser (15), cold-producing medium Storage Box (13) connects into a cover refrigeration system, sample box (19) bottom is placed with permeable stone (12), place sample (20) above permeable stone (12), put again a permeable stone (12) above sample (20), then use top cap (11) to cover the permeable stone (12) that sample is placed above, by pressuring shaft (10), sample (20) is pressurizeed, change by vertical displacement meter (9) observed reading when breathing occurs sample (20), polytene heat-insulation foam (18) and thermometer (7) are arranged in freeze thawing chamber (17), thermometer (7) is connected 9 with vertical displacement meter) connect computer and realize real-time data collection, pressuring shaft (10) provides pressure at right angle by loading frame (8) by pressurization lever (28) and the counterweight (24) that gim peg (22) connects, loading frame (8) is by rotation axis (23), counterweight (24), large counterweight (27), pressurization lever (28) forms, loading frame (8) is connected with instrument base (21) by gim peg (22), two rotation axiss (23) that drive loading frame (8) lifting connect by the first metal lift hook (25), counterweight (24) is connected by the second metal lift hook (26) with pressurization lever (28), utilize the method for this device measurement soil sample freeze thawing deformation under lateral confinement vertical loading condition as follows:
1. sample is installed: first permeable stone (12) is put into sample box (19), then put into sample (20), put into again permeable stone (12), the top adds caping cap (11), pressuring shaft (10) is aimed at top cap (11), counterweight (24) is placed on below the second metal lift hook (26), by loading frame (8), make pressuring shaft (10) aim at top cap (11), sample (20) is applied authorised pressure, and vertical displacement meter (9) is placed on top cap (11), reading is made zero;
2. freeze sample: start compressor (16), make cold-producing medium (13) by condenser (15), enter in evaporator (14), sample (20) is carried out frozen cooling, by the temperature of thermometer (7) Control Assay (20), treat that temperature reaches testing requirements, close compressor (16), by the measurement of vertical displacement meter (9), draw the freezing expansion amount of sample (20) at regulation pressure at right angle and temperature;
3. melt sample: start heating water tank (1), open downcomer controlled valve (3), hot water flows in freeze thawing chamber (17) by downcomer (5), then close downcomer controlled valve (3), sample after freezing (20) is heated, after heat is transmitted, as do not reach the temperature of testing requirements, open upper hose controlled valve (4), open water pump (2), water in freeze thawing chamber (17) is drawn back heating water tank (1), then close upper hose controlled valve (4), again the heating of the water in heating water tank (1), and then open downcomer controlled valve (3), allow hot water flow in freeze thawing chamber (17), close downcomer controlled valve (3), sample after freezing (20) is heated again, when thermometer (7) reaches the temperature of testing requirements, stopped heating, open simultaneously upper hose controlled valve (4), start water pump (2), water is drawn back heating water tank (1), then close upper hose controlled valve (4), observe simultaneously the reading of vertical displacement meter (9), draw the thawing amount of contraction of sample (20) at regulation pressure at right angle and temperature,
4. as the breathing volume change of carrying out after the sample multigelation measure, 2. 3. repeating step and reads the volume swell-shrinking deformation amount of sample (20) at regulation pressure at right angle and temperature from vertical displacement meter (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110070078 CN102156076B (en) | 2010-03-26 | 2010-03-26 | Method for measuring freeze thawing deformation of one-dimensional lateral limit loaded soil sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110070078 CN102156076B (en) | 2010-03-26 | 2010-03-26 | Method for measuring freeze thawing deformation of one-dimensional lateral limit loaded soil sample |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101326240A Division CN101806686B (en) | 2010-03-26 | 2010-03-26 | Testing method used for measuring repeated expansion , shrinkage and deformation of soil sample |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102156076A CN102156076A (en) | 2011-08-17 |
| CN102156076B true CN102156076B (en) | 2013-05-15 |
Family
ID=44437653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110070078 Expired - Fee Related CN102156076B (en) | 2010-03-26 | 2010-03-26 | Method for measuring freeze thawing deformation of one-dimensional lateral limit loaded soil sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102156076B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568599B (en) * | 2015-01-19 | 2017-04-12 | 浙江大学 | Vacuum negative pressure/positive pressure/heat combined loading consolidation apparatus |
| CN106501489B (en) * | 2016-12-09 | 2018-10-02 | 长安大学 | Coarse Saline salt is swollen and molten sunken multifunction test device |
| CN107907655A (en) * | 2017-11-09 | 2018-04-13 | 安徽理工大学 | Multifunctional Frozen complex boundary thaw collapse coefficient measuring instrument |
| CN110186809A (en) * | 2019-06-04 | 2019-08-30 | 河北建筑工程学院 | A kind of novel frozen soil rheometer |
| CN111855735B (en) * | 2020-08-06 | 2021-06-22 | 兰州理工大学 | Efficient and accurate measuring device for salt expansion and frost heaving of salt solution |
| CN112083028B (en) * | 2020-10-09 | 2024-04-16 | 中国民航大学 | Frozen soil melting consolidation test device considering rainfall process |
| CN112362691B (en) * | 2020-10-29 | 2024-02-13 | 辽宁科技大学 | Device and method for detecting coal expansion pressure |
| CN113238026A (en) * | 2021-04-29 | 2021-08-10 | 中山大学 | Tester for freezing and melting soil body |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1173243A1 (en) * | 1983-11-28 | 1985-08-15 | Предприятие П/Я В-2679 | Process of testing material for long term plasticity |
| GB2220270A (en) * | 1988-07-01 | 1990-01-04 | China Steel Corp | Determination of metal properties during phase transformation |
| CN2479498Y (en) * | 2001-05-26 | 2002-02-27 | 中国科学院寒区旱区环境与工程研究所 | Low-temperature and high pressure ko consolidation instrument |
| CN101509865A (en) * | 2009-03-25 | 2009-08-19 | 中国科学院地质与地球物理研究所 | Nonsaturated soil hydraulic parameter measuring device and measuring method |
| CN201359584Y (en) * | 2009-01-07 | 2009-12-09 | 吉林大学 | Mechanics parameters tester for roadbed material under cyclic freezing and thawing conditions |
-
2010
- 2010-03-26 CN CN 201110070078 patent/CN102156076B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1173243A1 (en) * | 1983-11-28 | 1985-08-15 | Предприятие П/Я В-2679 | Process of testing material for long term plasticity |
| GB2220270A (en) * | 1988-07-01 | 1990-01-04 | China Steel Corp | Determination of metal properties during phase transformation |
| CN2479498Y (en) * | 2001-05-26 | 2002-02-27 | 中国科学院寒区旱区环境与工程研究所 | Low-temperature and high pressure ko consolidation instrument |
| CN201359584Y (en) * | 2009-01-07 | 2009-12-09 | 吉林大学 | Mechanics parameters tester for roadbed material under cyclic freezing and thawing conditions |
| CN101509865A (en) * | 2009-03-25 | 2009-08-19 | 中国科学院地质与地球物理研究所 | Nonsaturated soil hydraulic parameter measuring device and measuring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102156076A (en) | 2011-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101806686B (en) | Testing method used for measuring repeated expansion , shrinkage and deformation of soil sample | |
| CN102156076B (en) | Method for measuring freeze thawing deformation of one-dimensional lateral limit loaded soil sample | |
| CN110596177A (en) | Rock tunnel frozen-expansion force model based on rock-water-ice force in-situ test | |
| CN107727517A (en) | A kind of energy stake stake Soil Interface shearing experiment device and experimental method | |
| CN109283086B (en) | Method for accurately measuring and calculating elastic modulus of cold region tunnel rock after repeated freeze-thaw damage | |
| CN201622199U (en) | Measurement device of soil sample repeat freeze thawing deformation | |
| Zhu et al. | A constitutive model of frozen soil with damage and numerical simulation for the coupled problem | |
| CN103822875A (en) | Device and method for testing energy pile-soil contact surface frictional force | |
| Shen et al. | The impact of environmental temperature change on the interior temperature of quasi-sandstone in cold region: experiment and numerical simulation | |
| CN103728185A (en) | Low-temperature dynamic triaxial apparatus | |
| CN106645261A (en) | Large-sized multifunctional artificial freezing platform | |
| Davies et al. | Laboratory measurement of the shear strength of ice-filled rock joints | |
| CN204479570U (en) | A kind of device for fast detecting being applicable to saliferous clay frost heave and molten sunken property | |
| Qi et al. | Model test on the development of thermal regime and frost heave of a gravelly soil under seepage during artificial freezing | |
| Feng et al. | Experimental study of the anisotropic frost heave characteristics of rock surrounding tunnels in cold regions | |
| Evirgen et al. | A physical soil freezing model for laboratory applications | |
| CN106124553B (en) | A kind of novel and multifunctional frost heave test instrument | |
| CN207215736U (en) | A kind of body frost heaving amount, thaw collapse deflection and frost-heave force simultaneous determination device | |
| Wasif Naqvi et al. | Investigating the Frost Action in Soils | |
| Tang et al. | Frost heave performance of a foundation at an overhead transmission line in the alpine seasonal frozen regions | |
| Qian et al. | Experimental study on convection characteristics of crushed-rock layer | |
| Swan et al. | Characteristics of Chicago Blue Clay Subjected to a Freeze–Thaw Cycle | |
| Lu et al. | Hydro-thermal characteristics and deformation behaviors of silty clay subjected to freeze–thaw cycles | |
| Lao et al. | Research on the temperature field of a partially freezing sand barrier with groundwater seepage | |
| CN207439836U (en) | A kind of energy stake Pile Soil interface shearing experimental provision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20190326 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |