CN110361522A - A kind of moisturizing freeze thawing device and method for frozen soil experiment - Google Patents
A kind of moisturizing freeze thawing device and method for frozen soil experiment Download PDFInfo
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- CN110361522A CN110361522A CN201910697946.0A CN201910697946A CN110361522A CN 110361522 A CN110361522 A CN 110361522A CN 201910697946 A CN201910697946 A CN 201910697946A CN 110361522 A CN110361522 A CN 110361522A
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- 239000002689 soil Substances 0.000 title claims abstract description 96
- 230000003020 moisturizing effect Effects 0.000 title claims abstract description 65
- 238000010257 thawing Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000002474 experimental method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000012360 testing method Methods 0.000 claims abstract description 16
- 230000008014 freezing Effects 0.000 claims abstract description 15
- 238000007710 freezing Methods 0.000 claims abstract description 15
- 230000001932 seasonal effect Effects 0.000 claims abstract description 10
- 238000004088 simulation Methods 0.000 claims abstract description 9
- 239000004793 Polystyrene Substances 0.000 claims abstract description 7
- 229920002223 polystyrene Polymers 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 3
- 238000004321 preservation Methods 0.000 claims abstract 4
- 230000004087 circulation Effects 0.000 claims description 7
- 239000003755 preservative agent Substances 0.000 claims description 6
- 230000002335 preservative effect Effects 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 5
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000002844 melting Methods 0.000 abstract description 2
- 230000008018 melting Effects 0.000 abstract description 2
- 238000011160 research Methods 0.000 description 7
- 230000006378 damage Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005945 translocation Effects 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 2
- 229940046466 freeze it Drugs 0.000 description 2
- 238000010309 melting process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- 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
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/04—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of melting point; of freezing point; of softening point
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- 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
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/04—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of melting point; of freezing point; of softening point
- G01N25/06—Analysis by measuring change of freezing point
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Pathology (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Geology (AREA)
- Food Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Remote Sensing (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to a kind of moisturizing freeze thawing device and methods for frozen soil experiment, for the two-way Frozen-thawed cycled for freezing-unidirectionally melting of the unidirectional freeze thawing in seasonal frost region outside simulating chamber and Permafrost Area.It includes: the heat-preservation case (1) encapsulated by extruded polystyrene board that the present invention forms substantially, poly (methyl methacrylate) plate (2), moisturizing soil layer (3), it tests soil sample (4), freeze refrigerating plant (5), temperature sensor (6), upper plate keep the temperature cap (7), data collecting instrument (9) controllable temperature recirculated water bath cabinet (10).This hair considers the freezing method and situation of the practical nature in seasonal frost region and Permafrost Area, passes through (5) two refrigerating plants up and down, the native temperature change of every layer of temperature sensor real-time monitoring of cooperation；Evaded previous closed system not moisturizing by moisturizing soil layer and the drawbacks of open system is directly connected to water source moisturizing and Permafrost Area Unidirectional Freezing, can with accurate simulation Unidirectional Freezing, two-way freeze.
Description
Technical field
The invention belongs to season permafrost regions and Permafrost Area open system Frozen-thawed cycled field, are related to a kind of for frozen soil examination
The moisturizing freeze thawing device and method tested.
Background technique
China's permafrost region is widely distributed, and wherein season frozen soil accounts for about the 53.5% of national territorial area, and ever-frozen ground accounts for about territory face
Long-pending 21.5%.Many mega projects are built in permafrost region, railway, and highway network constantly expands development, many roads and roadbed
There is frost heave, thaw collapse is bursted and become muddy when a thaw sets in, and the disasters such as cracking cause huge economic loss, seriously affect the traveling of road, or even make
At traffic accident.Therefore, very urgent to the research of soil strength under Frozen-thawed cycled and physico-mechanical properties.And it is well-known
Frozen-thawed cycled is an extremely complex process, the more bad control of outdoor test, many natural causes unavoidably with control,
Therefore, the practical Frozen-thawed cycled studied using relevant issues of the laboratory experiment to Frozen-thawed cycled to reflect nature is current
Main research means.Currently, the research to Frozen-thawed cycled problem, many scholars have been carried out comparable research, also achieve
Many achievements, the three-dimensional since most are freezed, and then with the deep discovery of research, many roadbed three-dimensionals are freezed to be not meet certainly
Right practical freeze thawing mode；Therefore, it is proposed to Unidirectional Freezing.And generally there is water translocation benefit during nature Unidirectional Freezing
The moisturizing given, but studied in the past is that test sample bottom is directly connected with external source, but the underground water source of nature is general
It all buries relatively deeply, the depth freezed generally fails the position for being frozen into underground water source, and therefore, this freezing method can not be universal
Reflect the process of nature freeze thawing.Meanwhile being that individual event is freezed-unidirectionally melted for studying mostly in Permafrost Area before, ignore
The influence of Permafrost Area Frozen-thawed cycled layer, and roadbed Frozen-thawed cycled of lower season layer is between atmosphere and permafrost,
Along with the variation of seasonal climate, what unfreezing showed as with temperature gradient two-way freezes-unidirectional melting process.Cause
This, research is two-way to freeze-unidirectionally melts influence of the Frozen-thawed cycled effect to soil strength and physico-mechanical properties with very heavy
The meaning wanted.A kind of moisturizing freeze thawing device and method for frozen soil experiment can really reflect the roadbed freeze thawing of nature seasonal frost region
Mode, while realizing unidirectional freeze thawing, sample can obtain the supply of water translocation, real simulation nature from the soil of lower part
True freeze thawing water supplementing method.Simultaneously true simulation Permafrost Area it is two-way freeze-it is unidirectional melt Frozen-thawed cycled process, evade
The drawbacks of previous Unidirectional Freezing.
Summary of the invention
The object of the present invention is to provide a kind of moisturizing freeze thawing device and methods for frozen soil experiment.
Above-mentioned purpose is achieved through the following technical solutions
A kind of moisturizing freeze thawing device for frozen soil experiment, composition includes: the native case encapsulated by extruded polystyrene board thermal insulation material,
Native chamber interior wall and bottom are both provided with machine glass plate, prevent the destruction of extruded polystyrene board thermal insulation material during the test, described
Upper plate cap, be designed to certain size build-in in native case, guarantee the closure of native case.
The moisturizing soil layer be placed in moisturizing soil case and be layered carry out setting compactness hit reality, the sample is thereon
Portion and surrounding, which wrap up lower openings with preservative film, contacts it with moisturizing soil layer, and sample is inserted into build-in on the top of moisturizing soil layer
In moisturizing soil layer and to soil layer around carry out it is certain hit reality, but sample to be prevented to be extruded destruction, the top of sample and benefit
The top of water and soil layer is directly contacted with the refrigerating plant, it is ensured that refrigeration effect reaches reality that is best and more meeting nature
Situation has reappeared scene completely and has freezed water supplementing method, while being also equipped with refrigerating plant in moisturizing soil layer bottom, and cooperation temperature passes
Two-way the drawbacks of freezing-unidirectionally melting Frozen-thawed cycled process, evaded previous Unidirectional Freezing, is simulated in the use of sensor.
Its internal pipeline that can lead to for circulation of the refrigerating plant, outside connect by two interfaces, respectively with controllable temperature
The connection of recirculated water bath cabinet is freezed and thaw cycle process by setting target temperature circulation pumping anti-icing fluid to realize.
The temperature sensor and data collecting instrument, every layer of all embedding temperature while reality is hit in the layering of moisturizing soil layer
It sensor and is directly contacted in the sensor of topmost with refrigerating plant, the data collecting instrument is by temperature sensor come real
The temperature change of Shi Fanying soil layer.
A kind of moisturizing freezing-thawing method for frozen soil experiment, basic step are as follows: will prepare certain moisture content first
The compactness that soil layering is designed hits reality, and every layer of embedding temperature sensor, places after reaching a certain height and pounds in advance
Test soil sample, surrounding and top wrapped up with preservative film, and bottom is directly contacted with moisturizing soil layer by filter paper, and to soil sample around
Soil is also hit reality to a certain degree, but to be prevented soil sample from being squeezed by surrounding soil and be destroyed, finally allow at the top of soil sample and at the top of soil layer and
Top refrigerating plant directly contacts, and then encapsulates upper plate and keeps the temperature cap, top controllable temperature recirculated water bath cabinet is opened, by setting
Set the goal temperature, simulates the unidirectional moisturizing Frozen-thawed cycled in seasonal frost region；Two controllable temperature recirculated water bath cabinets up and down are opened, simulation is frozen for many years
Native area is two-way to freeze-unidirectional melt moisturizing Frozen-thawed cycled.
Beneficial effects of the present invention:
1. refrigerating plant is connect by the present invention with controllable temperature recirculated water bath cabinet, top refrigerating plant is opened, is realizing Unidirectional Freezing
While, sample can obtain the supply of water translocation from the soil of lower part.Not only evade closed system without water recharging and opening
Water charging system is directly with the excessive too fast deficiency of water source contact moisturizing, and the sample insertion build-in is in moisturizing soil layer, surrounding
Being wrapped up with top with preservative film prevents soil layer around it from carrying out moisturizing to it, and bottom is directly contacted by filter paper with moisturizing soil layer,
Ensure may be implemented unidirectional bottom moisturizing, reappeared scene completely and freezed water supplementing method, it is true more really to simulate seasonal frost region
Real frozen-thaw process under natural conditions.
The present invention works at the same time upper and lower two refrigerating plants, and realization is two-way to be freezed, and avoids previous in Permafrost Area
The Unidirectional Freezing of research, more real simulation Permafrost Area be two-way to be freezed-unidirectional melt Frozen-thawed cycled process.And production letter
It is list, practical value height, small volume, cheap, easy to operate.
The present invention is by the recirculated water bath cabinet of refrigerating plant connection controllable temperature, by setting target temperature, more structurally sound reality
Now freeze and melting process, the use of combination temperature sensor, real-time monitoring record the temperature change of soil layer at a certain distance,
Ensure to realize Unidirectional Freezing and it is two-way freeze-unidirectional melt obtain ideal test result.
Detailed description of the invention:
Attached drawing 1 is structural plan schematic diagram of the invention
Attached drawing 2 is perspective view of the invention
Attached drawing 3 is structural profile enlarged drawing of the invention
Attached drawing 4 is unidirectional freeze thawing temperature profile of the invention
Attached drawing 5 is the plot of water cut figure after the present invention test unidirectional freeze thawing moisturizing of soil sample
In figure: the moisturizing soil case of -1 extruded polystyrene board thermal insulation material encapsulation；- 2 poly (methyl methacrylate) plates；- 3 moisturizing soil layers；- 4 soil samples；-5
Refrigerating plant；- 6 temperature sensors；- 7 upper plate extruded polystyrene boards keep the temperature cap；- 8 connection water baths and refrigerating plant follow
Endless tube road；- 9 data collecting instruments；- 10 controllable temperature recirculated water bath cabinets；- 11 anti-icing fluid；- 12 can set the water bath regulating switch of temperature
Embodiment 1:
The benefit that a kind of moisturizing freeze thawing device for frozen soil experiment, substantially composition include: the encapsulation of extruded polystyrene board thermal insulation material
Water and soil case, and the just upper plate cap of build-in prevent from exchanging with external heat inside native case, and the moisturizing soil layer is set
It carries out hitting reality by the density of design requirement in moisturizing soil case, and embedding temperature sensor at a certain distance, real-time monitoring note
The freeze thawing temperature change of soil layer in native case is recorded, the temperature sensor connects data collecting instrument, records the freeze thawing of soil layer in real time
Situation,
Embodiment 2:
According to a kind of moisturizing freeze thawing device for frozen soil experiment described in embodiment 1, the test sample, around with fresh-keeping
Film package is inserted directly into moisturizing soil layer, and top is directly contacted with refrigerating plant, it is ensured that soil sample can with Unidirectional Freezing, from lower part with
The part of moisturizing soil layer contact carries out moisturizing, has reappeared scene completely and has freezed water supplementing method, analog seasonal frost region nature is true
Unidirectional moisturizing frozen-thaw process.
Embodiment 3: according to a kind of moisturizing freeze thawing device for frozen soil experiment described in embodiment 1, upper and lower two with can
The refrigerating plant of temperature controlled water bath case connection can be frozen for many years respectively by setting target temperature and combination temperature sensor, analog
Native area is two-way to freeze-unidirectional melt Frozen-thawed cycled process.
Embodiment 4: according to a kind of moisturizing freeze thawing device for frozen soil experiment described in embodiment 1, the refrigeration dress
It sets and is connected to circulation interface, the recirculated water bath cabinet of the circulation interface connection controllable temperature realizes individual event by pumping anti-icing fluid
Freeze that-unidirectional melt with two-way freeze-is unidirectional to melt, described upper plate cap, design certain size just build-in in soil
Case guarantees maximum packaging effect, reduces and exchanges with the cold and hot of the external world.
Embodiment 5: a kind of moisturizing freeze thawing device for frozen soil experiment, the test specimen according to embodiment 1-2
Sample is inserted into build-in and in real time has to that test specimen is prevented to be extruded destruction hit to moisturizing soil layer in moisturizing soil layer.
A kind of moisturizing freezing-thawing method for frozen soil experiment, basic step according to embodiment 1-4 are as follows: first
The compactness that the soil layering for preparing certain moisture content is designed is hit into reality, and every layer of embedding temperature sensor, it is certain reaching
The test soil sample pounded in advance is placed after height, surrounding and top are wrapped up with preservative film, and bottom is directly native with moisturizing by filter paper
Layer contact, and reality is also hit to a certain degree to soil around soil sample, but to prevent soil sample from being squeezed by surrounding soil and destroy, finally allow soil
It is directly contacted at the top of sample and at the top of soil layer with top refrigerating plant, then encapsulates upper plate and keep the temperature cap, it is controllable to open top
Warm recirculated water bath cabinet simulates the unidirectional moisturizing Frozen-thawed cycled in seasonal frost region by setting target temperature；Two controllable temperatures up and down are opened to follow
Ring water bath, simulation Permafrost Area is two-way to freeze-it is unidirectional melt take out after the completion of moisturizing freezing and thawing test soil sample on to
Under divide 5 layer 1,2,3,4,5 survey its moisture content respectively.
Claims (5)
1. a kind of moisturizing freeze thawing device for frozen soil experiment, mainly connects by the recirculated water bath cabinet of controllable temperature and by circulation line
Unidirectional refrigerating plant, it is characterized in that the water bath by setting target temperature circulation pumping anti-icing fluid pass through refrigerating plant
Unidirectional Freezing is carried out to soil layer and the sample refrigeration being in contact with it, the moisturizing soil layer is placed in heat-preservation case, described
The extruded polystyrene board thermal insulation material that moisturizing soil chamber interior wall surrounding and bottom are encapsulated by poly (methyl methacrylate) plate forms, the test soil
Sample is inserted into build-in in moisturizing soil layer, and the top of soil layer and sample is contacted with refrigerating plant, the temperature sensor sum number
According to collector, 5 layers of moisturizing soil layer point is carried out hitting real and every layer of embedding temperature sensor, real-time monitoring respectively by the compactness of design
Every layer of temperature change accurate simulation Unidirectional Freezing and two-way can be freezed.
2. a kind of moisturizing freeze thawing device for frozen soil experiment according to claim 1, it is characterized in that: the controllable temperature
Recirculated water bath cabinet can freeze it and be melted by setting target temperature, the described sample insertion build-in in moisturizing soil layer,
Its surrounding and top are wrapped up with preservative film prevents soil layer around it from carrying out moisturizing to it, and bottom is direct by filter paper and moisturizing soil layer
Contact, it is ensured that unidirectional bottom moisturizing may be implemented, reappeared scene completely and freezed water supplementing method, the soil around sample carries out certain
Degree hits reality but test specimen is prevented to be squeezed and deformed, and tests soil sample and moisturizing soil layer is directly contacted with top refrigerating plant, more
The actual unidirectional frozen-thaw process in simulation nature seasonal frost region accurately.
3. a kind of moisturizing freeze thawing device for frozen soil experiment according to claim 1 to 2, it is characterized in that it is described with can
Two refrigerating and heating apparatus of temperature control recirculated water bath cabinet connection work at the same time by setting target temperature, cooperate temperature sensor
It uses, simulates the two-way of Permafrost Area and freeze-unidirectionally melt, more accurately simulate nature Permafrost Area and really freeze
Melt cyclic process.
4. a kind of moisturizing freeze thawing device for frozen soil experiment according to claim 1 to 3, it is characterized in that: the upper top
Plate keep the temperature cap size and heat-preservation box opening surrounding just build-in in one, it is ensured that realize the maximum efficiency of heat preservation, reduce
Cold and hot with the external world exchanges.
5. a kind of -4 moisturizing freezing-thawing method for frozen soil experiment, basic step are as follows according to claim 1: will prepare first
The compactness that the soil layering of certain moisture content is designed hits reality, and every layer of embedding temperature sensor, after reaching a certain height
The targeted test soil sample pounded, surrounding and top in advance is placed to be wrapped up with preservative film, bottom pass through filter paper directly with moisturizing soil layer
Contact, and reality is also hit to a certain degree to soil around soil sample, but to prevent soil sample from being squeezed by surrounding soil and destroy, finally allow soil sample
It is directly contacted at the top of top and soil layer with top refrigerating plant, then encapsulates upper plate and keep the temperature cap, open top controllable temperature
Recirculated water bath cabinet simulates the unidirectional moisturizing Frozen-thawed cycled in seasonal frost region by setting target temperature；Open two controllable temperature circulations up and down
Water bath, simulation Permafrost Area is two-way to freeze-unidirectional melt moisturizing Frozen-thawed cycled.
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| CN201910697946.0A CN110361522A (en) | 2019-07-29 | 2019-07-29 | A kind of moisturizing freeze thawing device and method for frozen soil experiment |
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| CN201910697946.0A CN110361522A (en) | 2019-07-29 | 2019-07-29 | A kind of moisturizing freeze thawing device and method for frozen soil experiment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912693A (en) * | 2020-07-30 | 2020-11-10 | 石河子大学 | Frozen soil, frozen soil and frozen soil engineering research foundation platform |
| CN113075249A (en) * | 2021-03-18 | 2021-07-06 | 中国科学院、水利部成都山地灾害与环境研究所 | Experimental device and method for researching melting and rain and snow transformation characteristics of frozen soil of sloping field |
| CN113125496A (en) * | 2021-03-26 | 2021-07-16 | 北京中煤矿山工程有限公司 | Portable multifunctional small-sized freezing simulation test system and simulation method |
| CN113447639A (en) * | 2021-06-24 | 2021-09-28 | 中山大学 | Frozen soil freeze-thaw cycle process simulation device |
| CN113588912A (en) * | 2021-04-29 | 2021-11-02 | 中国科学院西北生态环境资源研究院 | Simulation system and method for on-site simulation of frozen soil environment |
| CN114428098A (en) * | 2021-12-03 | 2022-05-03 | 兰州交通大学 | Model test system for freeze-thaw cycle test |
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| CN104267172A (en) * | 2014-09-30 | 2015-01-07 | 中国科学院寒区旱区环境与工程研究所 | Multifunctional integrated type soil body freezing and thawing test system |
| CN106526129A (en) * | 2016-10-26 | 2017-03-22 | 中国地震局工程力学研究所 | One-way freezing-thawing natural water replenishing device |
| CN110044950A (en) * | 2019-04-30 | 2019-07-23 | 西南交通大学 | Freezing-thawing test system |
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| CN104267172A (en) * | 2014-09-30 | 2015-01-07 | 中国科学院寒区旱区环境与工程研究所 | Multifunctional integrated type soil body freezing and thawing test system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111912693A (en) * | 2020-07-30 | 2020-11-10 | 石河子大学 | Frozen soil, frozen soil and frozen soil engineering research foundation platform |
| CN111912693B (en) * | 2020-07-30 | 2023-06-30 | 石河子大学 | Frozen soil, frozen soil and frozen soil engineering research foundation platform |
| CN113075249A (en) * | 2021-03-18 | 2021-07-06 | 中国科学院、水利部成都山地灾害与环境研究所 | Experimental device and method for researching melting and rain and snow transformation characteristics of frozen soil of sloping field |
| CN113125496A (en) * | 2021-03-26 | 2021-07-16 | 北京中煤矿山工程有限公司 | Portable multifunctional small-sized freezing simulation test system and simulation method |
| CN113588912A (en) * | 2021-04-29 | 2021-11-02 | 中国科学院西北生态环境资源研究院 | Simulation system and method for on-site simulation of frozen soil environment |
| CN113588912B (en) * | 2021-04-29 | 2023-10-20 | 中国科学院西北生态环境资源研究院 | Simulation system and method for simulating frozen soil environment on site |
| CN113447639A (en) * | 2021-06-24 | 2021-09-28 | 中山大学 | Frozen soil freeze-thaw cycle process simulation device |
| CN114428098A (en) * | 2021-12-03 | 2022-05-03 | 兰州交通大学 | Model test system for freeze-thaw cycle test |
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Application publication date: 20191022 |
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