CN112051157A - Temperature control testing device for large-size unsaturated coarse-grained soil - Google Patents
Temperature control testing device for large-size unsaturated coarse-grained soil Download PDFInfo
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- CN112051157A CN112051157A CN202010743326.9A CN202010743326A CN112051157A CN 112051157 A CN112051157 A CN 112051157A CN 202010743326 A CN202010743326 A CN 202010743326A CN 112051157 A CN112051157 A CN 112051157A
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- 239000002689 soil Substances 0.000 title claims abstract description 41
- 238000012360 testing method Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000011148 porous material Substances 0.000 claims description 38
- 239000000523 sample Substances 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000002955 isolation Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 239000002861 polymer material Substances 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 8
- 238000011160 research Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 239000011362 coarse particle Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- 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
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
- G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
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- 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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0224—Thermal cycling
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- 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
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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- Automation & Control Theory (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a temperature control testing device for large-size unsaturated coarse-grained soil, which comprises a base and a temperature control internal pressure chamber connected to the base, wherein the temperature control internal pressure chamber is provided with a temperature control channel and an inner cavity, the bottom of the temperature control channel is provided with a water inlet hole and a water drain hole, the base is provided with a first through hole and a second through hole which correspond to and are communicated with the water inlet hole and the water drain hole, and the lower openings of the first through hole and the second through hole are connected with an external temperature control circulating device through a pipeline. The device realizes the control of the dry and wet state and the temperature of unsaturated coarse-grained soil in a conventional large triaxial apparatus, and further carries out the research of unsaturated coarse-grained soil static and dynamic tests and the determination of a water holding curve under different temperature conditions.
Description
Technical Field
The invention relates to a geotechnical test kit, in particular to a large-size unsaturated coarse-grained soil temperature control testing device.
Background
Unsaturated coarse-grained soil is widely existed in roadbed fillers, road base layers, side slopes and other near-ground structures, and is influenced by environmental factors to be in a changing temperature field and humidity field condition for a long time, so that the static and dynamic stress characteristics of the unsaturated coarse-grained soil have obvious difference. Geotechnical test is a main means for obtaining physical and mechanical parameters of soil body, and the standard of geotechnical test method (GB/T50123-1999) is an instructive specification about geotechnical test in the fields of investigation and design in China. In the specification, a test determination method for the static and dynamic stress characteristics, water retention curves and soil body related physical parameters of unsaturated soil, particularly unsaturated coarse-grained soil considering thermal effect, is lacked.
The axis translation technology is the most advanced technical means which can be combined with a triaxial test in all matrix suction control methods at present, and has the advantages of accuracy, simplicity in operation, small influence of temperature, capability of being used together with other equipment and the like. The previous coarse-grained soil geotechnical test based on large triaxial equipment is relatively simple, is lack of large triaxial test equipment suitable for considering thermal effect influence, cannot measure static and dynamic stress characteristics and physical parameters of soil under a temperature control condition, and the triaxial equipment improved by the thermal effect often has the problems that the size of a sample is insufficient, a matrix suction control system needs to be upgraded when unsaturated soil test research is carried out, and the like, and cannot carry out related research on the static and dynamic stress characteristics and water holding characteristics of the unsaturated coarse-grained soil under the temperature control condition. Therefore, a temperature control testing device for large-size unsaturated coarse-grained soil is needed.
Disclosure of Invention
In view of the shortcomings of the background art, the technical problem to be solved by the invention is to provide a large-size unsaturated coarse-particle soil temperature control testing device which can control the suction force and temperature of a substrate and is suitable for researching the static and dynamic stress characteristics and the water retention characteristics of unsaturated coarse particles with larger particle sizes.
Therefore, the temperature control testing device for the large-size unsaturated coarse-grained soil comprises a base and a temperature control internal pressure chamber connected to the base, wherein the temperature control internal pressure chamber is provided with a temperature control channel and an inner cavity, the bottom of the temperature control channel is provided with a water inlet hole and a water drain hole, the base is provided with a first through hole and a second through hole which correspond to the water inlet hole and the water drain hole and are communicated with the water inlet hole and the water drain hole, and the lower openings of the first through hole and the second through hole are connected with an external temperature control circulating device through pipelines.
Furthermore, the temperature control pressure chamber comprises an outer sleeve and an inner sleeve, the inner sleeve is nested in the outer sleeve, a temperature control channel is formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve, a double spiral groove is formed in the outer wall of the inner sleeve, the temperature control channel is a double spiral channel, and the water inlet hole and the water drain hole are correspondingly formed in the bottom of the double spiral channel.
Further, the base includes sample base, temperature isolating device and fixing device, be equipped with top disc, middle part disc and bottom disc on the sample base, the surface of top disc has the holding tank, install the argil board of high air admission value in the holding tank, inside first pore and the second pore of being equipped with of sample base, the upper open end in first pore and second pore is located the holding tank bottom to switch on with the holding tank, the lower open end in first pore and second pore is located the both sides of base respectively, the lower open end in first pore and second pore is connected with water pressure system through the hose respectively.
Further, the method comprises the following steps: a temperature sensor is arranged in the sample base, and a probe of the temperature sensor is arranged on the middle disc.
Furthermore, the first through hole and the second through hole are respectively arranged on the bottom disc, and the first through hole and the second through hole respectively correspond to and are communicated with the water drain hole and the water inlet hole.
Furthermore, the inner wall of the containing groove is provided with an annular convex edge, the bottom of the high-air-intake-value argil plate is abutted against the annular convex edge, a cavity is formed below the annular convex edge, and the first pore channel and the second pore channel are communicated with the cavity.
Furthermore, the temperature isolation device is arranged between the sample base and the fixing device and consists of a high polymer material heat insulation block and a built-in dryer.
Furthermore, at least one sealing ring is arranged between the base and the temperature control internal pressure chamber.
Further, the external temperature control circulating device is a heating and refrigerating bath circulator, a temperature control medium circulates in the heating and refrigerating bath circulator, and the temperature control medium is low-consistency silicone oil.
In the invention, a sample is placed in a temperature control inner pressure cavity, and a double-helix pore passage in a temperature control channel of the temperature control inner pressure cavity is connected with an external temperature control circulating device through a pipeline to form an external circulating passage. The external temperature control circulating device is a heating and refrigerating bath circulator, and a temperature control medium circulates in the heating and refrigerating bath circulator. The heating and refrigerating bath circulator can heat or refrigerate the temperature of the temperature control medium by taking the low-consistency silicone oil as the temperature control medium, so that the temperature of the temperature control medium is regulated. The temperature control medium circulates in the double-helix pore channel of the temperature control internal pressure chamber through the external heating and refrigerating bath circulator and the pipeline. The temperature control medium enters the double-spiral pore passage from the first through hole and the water inlet through the pipeline, spirals from bottom to top along the double-spiral pore passage to the top of the internal pressure chamber, then spirals downwards along the pore passage and is discharged through the second through hole, so that the uniformity and stability of the internal temperature of the internal pressure chamber are ensured, the temperature rise or the temperature reduction of the liquid in the internal pressure chamber is completed, and the temperature control of the whole sample is realized. Further carrying out the research of the unsaturated coarse-grained soil static and dynamic test and the measurement of the water holding curve under different temperature conditions.
Drawings
FIG. 1 is a schematic structural diagram of a large-sized unsaturated coarse-grained soil temperature control testing device according to the present invention;
FIG. 2 is a schematic exploded view of the temperature control testing device for large-sized unsaturated coarse-grained soil in FIG. 1;
FIG. 3 is a schematic cross-sectional view of the temperature control testing apparatus for large-sized unsaturated coarse-grained soil in FIG. 1;
FIG. 4 is a schematic cross-sectional view of a base of the temperature control testing apparatus for large-sized unsaturated coarse-grained soil in FIG. 1;
FIG. 5 is a schematic top view of the base of the temperature control testing apparatus for large-sized unsaturated coarse-grained soil in FIG. 4;
FIG. 6 is a schematic structural diagram of an outer sleeve of the large-sized unsaturated coarse-grained soil temperature control testing device in FIG. 1;
fig. 7 is a schematic view of an inner sleeve structure of the large-sized unsaturated coarse-grained soil temperature control testing device in fig. 1.
Detailed Description
Referring to fig. 1-7, the temperature control testing device for the large-size unsaturated coarse-grained soil provided by the invention comprises a base 1 and a temperature control internal pressure chamber 2 connected to the base, wherein at least one sealing ring 34 is arranged between the base 1 and the temperature control internal pressure chamber 2, a plurality of bolt grooves 7 are arranged on the base 1, bolt holes 8 are arranged at positions of the temperature control internal pressure chamber corresponding to the bolt grooves, bolts sequentially penetrate through the threaded holes 8 to be in threaded connection with the bolt grooves 7, and the base 1 and the temperature control internal pressure chamber 2 are in sealed connection and fixed through bolts.
The temperature control internal pressure chamber 2 is provided with a temperature control channel 3 and an inner cavity 4, the temperature control pressure chamber 2 comprises an outer sleeve 5 and an inner sleeve 6, the inner sleeve 6 is nested in the outer sleeve 5, sealing rubber is arranged at the connection position of the inner sleeve 6 and the outer sleeve 5, and the inner sleeve 6 is hermetically connected with the outer sleeve 5. A temperature control channel 3 is formed between the outer wall of the inner sleeve 6 and the inner wall of the outer sleeve 5. The outer sleeve 5 and the inner sleeve 6 are made of high-quality stainless steel, and the inner wall and the outer wall of the outer sleeve 5 and the inner wall of the inner sleeve 6 are smooth in surface. The bottom of the temperature control channel 3 is provided with a water inlet hole 9 and a water outlet hole 10. The outer wall of the inner sleeve 6 is provided with a double spiral groove 11, the temperature control channel 3 is a double spiral channel, and the water inlet hole 9 and the water drain hole 10 are correspondingly arranged at the bottom of the double spiral channel. The base 1 is provided with a first through hole 12 and a second through hole 13. The upper openings of the first through hole 12 and the second through hole 13 correspond to the water inlet hole 9 and the water drain hole 10 respectively and are in conduction connection, the lower openings of the first through hole 12 and the second through hole 13 are connected with an external temperature control circulating device through a pipeline 14, and the pipeline 14 is an heat insulation pipeline.
The temperature control channel 3 of the temperature control internal pressure chamber is connected with an external temperature control circulating device through a pipeline 14 to form an external circulating channel, the external temperature control circulating device is a heating and refrigerating bath circulator 15, a temperature control medium circulates in the heating and refrigerating bath circulator 15, and the temperature control medium is low-consistency silicone oil. The parts of the heating and cooling bath circulator 15, which are immersed in the temperature control medium, are all made of high-quality stainless steel and high-grade plastic, so that the service life of the heating and cooling bath circulator 15 is prolonged. The heating-cooling bath circulator 15 can heat or cool the temperature of the temperature-control medium, thereby adjusting the temperature of the temperature-control medium. The temperature control medium passes through an external heating and refrigerating bath circulator 15 and a pipeline 14, and the circulation of the temperature control medium is realized in a double-spiral pore channel of a temperature control internal pressure chamber. The temperature control medium enters the double-spiral pore channel of the inner clamping cavity 3 from the first through hole 12 and the water inlet 9 through the pipeline 14, spirals from bottom to top along the double-spiral pore channel to the top of the inner pressure chamber, then spirals downwards along the pore channel and is discharged through the second through hole 13, so that the uniformity and stability of the temperature in the temperature control inner pressure chamber 2 are ensured, the temperature rise or the temperature drop of the liquid in the temperature control inner pressure chamber is completed, and the temperature control of the whole sample 16 is realized.
The base 1 comprises a sample base 17, a temperature isolation device 18 and a fixing device 19, wherein the temperature isolation device 18 is arranged between the sample base 17 and the fixing device 19, and the temperature isolation device 18 is connected with the metal sample base 17 and the metal fixing device 19 through bolts. The temperature isolation device 18 is composed of a high polymer material heat insulation block and a built-in dryer. And bolt through holes are symmetrically formed in the bottom of the metal fixing device 19 and are connected with the actuating base at the lower part of the conventional large triaxial apparatus through bolts.
The sample base 17 is provided with a top disc 20, a middle disc 21 and a bottom disc 22. The surface of the top disc 20 is provided with a holding groove 23, a high-air-intake-value argil plate 24 is mounted in the holding groove 23, the inner wall of the holding groove 23 is provided with an annular convex edge 25, the bottom of the high-air-intake-value argil plate 24 abuts against the annular convex edge 25, and a cavity is formed below the annular convex edge 25. The sample base 17 is internally provided with a first pore passage 26 and a second pore passage 27, the upper open ends of the first pore passage 26 and the second pore passage 27 are positioned at the bottom of the accommodating groove 23 and communicated with the cavity of the accommodating groove 23, the lower open ends of the first pore passage 26 and the second pore passage 27 are respectively positioned at two sides of the base 17, and the lower open ends of the first pore passage 26 and the second pore passage 27 are respectively connected with a hydraulic system 29 through a hose 28. The hydraulic system 29 is used for controlling the internal hydraulic pressure of the sample 16, the first through hole 12 and the second through hole 13 are respectively arranged on the bottom disc 22, and the first through hole 12 and the second through hole 13 respectively correspond to and are communicated with the drain hole 9 and the water inlet hole 10. The temperature sensor 30 is arranged in the sample base 17, the probe 31 of the temperature sensor is arranged on the middle disc 21, and when the temperature control internal pressure chamber 2 is connected with the base 1, the probe 31 of the temperature sensor is arranged in the inner cavity 4 to detect the temperature in the temperature control internal pressure chamber 2 in real time.
During the test, the temperature control testing device is firstly installed in the large triaxial apparatus, and the fixing device 19 of the temperature control testing device is tightly connected with the actuating base at the lower part of the triaxial apparatus through bolts. And sleeving the unsaturated coarse-grained soil sample 16 with a rubber membrane, placing the membrane-packaged sample in a temperature-controlled internal pressure chamber 2, and communicating the bottom of the sample 16 with a high-air-intake-value argil plate 24. The lower part of the clay plate 24 is connected with a water pressure control system 29 through a first duct 26 and a second duct 27 for controlling the water pressure inside the sample, and the device can accurately control the matrix suction inside the sample by means of an axial translation technology. And a metal top cap 32 is arranged on the top of the sample, and an exhaust hole on the metal top cap 32 is externally connected with an air pressure control system 33 through a pipeline and used for controlling the air pressure in the sample 16. The external heating and cooling bath circulator 15 adjusts the temperature of the temperature control medium, and the liquid of the temperature control medium in the double-spiral pore channel circulates through the circulating pump in the heating and cooling bath circulator, so that the temperature rise (the temperature reduction) of the liquid in the pressure chamber 2 can be completed. The real-time temperature monitoring and data acquisition of the PT100 temperature sensor 30 inside the temperature control internal pressure chamber 2 are combined, and the result is fed back, so that the accurate regulation of the temperature of the sample is realized. The controllable temperature range of the sample is-20 ℃ to 60 ℃, and the control precision is +/-0.5 ℃.
The device can accurately control the substrate suction inside a sample by a shaft translation technology through a high-air-intake-value argil plate base 24, an air pressure control system 33 and a water pressure control system 29, and realizes the control of the dry-wet state and the temperature of unsaturated coarse-grained soil in a conventional large triaxial apparatus by combining a temperature control system, so that the research of the static and dynamic test of the unsaturated coarse-grained soil and the determination of a water holding curve under the condition of cold and hot circulation are carried out.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A temperature control testing device for large-size unsaturated coarse-grained soil is characterized in that: the temperature control internal pressure chamber is connected to the base and provided with a temperature control channel and an inner cavity, a water inlet hole and a water drain hole are formed in the bottom of the temperature control channel, a first through hole and a second through hole which correspond to and are communicated with the water inlet hole and the water drain hole are formed in the base, and the lower openings of the first through hole and the second through hole are connected with an external temperature control circulating device through pipelines.
2. The temperature control testing device for the large-size unsaturated coarse-grained soil as claimed in claim 1, wherein: the temperature control pressure chamber comprises an outer sleeve and an inner sleeve, the inner sleeve is nested in the outer sleeve, a temperature control channel is formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve, a double spiral groove is formed in the outer wall of the inner sleeve, the temperature control channel is a double spiral channel, and the water inlet hole and the water drain hole are correspondingly formed in the bottom of the double spiral channel.
3. The temperature control testing device for the large-size unsaturated coarse-grained soil as claimed in claim 1 or 2, wherein: the base includes sample base, temperature isolating device and fixing device, be equipped with top disc, middle part disc and bottom disc on the sample base, the surface of top disc has the holding tank, install the argil board of high air admission value in the holding tank, inside first pore and the second pore of being equipped with of sample base, the upper open end in first pore and second pore is located the holding tank bottom to switch on with the holding tank, the lower open end in first pore and second pore is located the both sides of base respectively, the lower open end in first pore and second pore is connected with hydraulic system through the hose respectively.
4. The temperature control testing device for the large-size unsaturated coarse-grained soil as claimed in claim 3, wherein: a temperature sensor is arranged in the sample base, and a probe of the temperature sensor is arranged on the middle disc.
5. The temperature control testing device for the large-size unsaturated coarse-grained soil as claimed in claim 3, wherein: the first through hole and the second through hole are respectively arranged on the bottom disc, and correspond to and are communicated with the drain hole and the water inlet hole respectively.
6. The temperature control testing device for the large-size unsaturated coarse-grained soil as claimed in claim 3, wherein: the inner wall of the containing groove is provided with an annular convex edge, the bottom of the high-air-intake-value argil plate is abutted against the annular convex edge, a cavity is formed below the annular convex edge, and the first pore channel and the second pore channel are communicated with the cavity.
7. The temperature control testing device for the large-size unsaturated coarse-grained soil as claimed in claim 3, wherein: the temperature isolation device is arranged between the sample base and the fixing device and consists of a high polymer material heat insulation block and a built-in dryer.
8. The temperature control testing device for large-size unsaturated coarse-grained soil according to claim 1, 2, 4, 5, 6 or 7, wherein: at least one sealing ring is arranged between the base and the temperature control internal pressure chamber.
9. The temperature control testing device for large-size unsaturated coarse-grained soil according to claim 1, 2, 4, 5, 6 or 7, wherein: the external temperature control circulating device is a heating and refrigerating bath circulator, and a temperature control medium circulates in the heating and refrigerating bath circulator.
10. The temperature control testing device for the large-size unsaturated coarse-grained soil as claimed in claim 9, wherein: the temperature control medium is low-consistency silicone oil.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010743326.9A CN112051157A (en) | 2020-07-29 | 2020-07-29 | Temperature control testing device for large-size unsaturated coarse-grained soil |
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| CN202010743326.9A CN112051157A (en) | 2020-07-29 | 2020-07-29 | Temperature control testing device for large-size unsaturated coarse-grained soil |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4710948A (en) * | 1985-12-13 | 1987-12-01 | Atlantic Richfield Company | Geologic core holder with composite barrel |
| CN104614256A (en) * | 2015-02-06 | 2015-05-13 | 河海大学 | Temperature-controlled cold-hot cyclic unsaturated soil triaxial instrument |
| CN104964878A (en) * | 2015-07-14 | 2015-10-07 | 中国科学院武汉岩土力学研究所 | Triaxial test system and method for unsaturated soil multi-field coupling |
| CN206990362U (en) * | 2017-06-27 | 2018-02-09 | 北京建筑大学 | A kind of frozen soil static lateral pressure coefficient determines device |
| US20180120476A1 (en) * | 2016-03-08 | 2018-05-03 | South China Sea Institute Of Oceanology, Chinese Academy Of Sciences | System and method for determining the adiabatic stress derivative of the temperature for rocks under water |
-
2020
- 2020-07-29 CN CN202010743326.9A patent/CN112051157A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4710948A (en) * | 1985-12-13 | 1987-12-01 | Atlantic Richfield Company | Geologic core holder with composite barrel |
| CN104614256A (en) * | 2015-02-06 | 2015-05-13 | 河海大学 | Temperature-controlled cold-hot cyclic unsaturated soil triaxial instrument |
| CN104964878A (en) * | 2015-07-14 | 2015-10-07 | 中国科学院武汉岩土力学研究所 | Triaxial test system and method for unsaturated soil multi-field coupling |
| US20180120476A1 (en) * | 2016-03-08 | 2018-05-03 | South China Sea Institute Of Oceanology, Chinese Academy Of Sciences | System and method for determining the adiabatic stress derivative of the temperature for rocks under water |
| CN206990362U (en) * | 2017-06-27 | 2018-02-09 | 北京建筑大学 | A kind of frozen soil static lateral pressure coefficient determines device |
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Application publication date: 20201208 |