CN104215749A - Realization method of combined temperature gradient in frozen earth - Google Patents
Realization method of combined temperature gradient in frozen earth Download PDFInfo
- Publication number
- CN104215749A CN104215749A CN201410470342.XA CN201410470342A CN104215749A CN 104215749 A CN104215749 A CN 104215749A CN 201410470342 A CN201410470342 A CN 201410470342A CN 104215749 A CN104215749 A CN 104215749A
- Authority
- CN
- China
- Prior art keywords
- frozen soil
- flexible
- temperature
- control box
- frozen earth
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000003507 refrigerant Substances 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 238000012546 transfer Methods 0.000 claims abstract description 8
- 239000002689 soil Substances 0.000 claims description 75
- 238000009413 insulation Methods 0.000 claims description 16
- 238000002474 experimental method Methods 0.000 claims description 13
- 238000009826 distribution Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 8
- 230000011218 segmentation Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 6
- 238000011160 research Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses a realization method of a combined temperature gradient in frozen earth. An air-cooled temperature control box is arranged on the periphery of a vertical temperature gradient frozen earth testing machine, the wind current direction in the temperature control box is the same as the frozen earth sample temperature gradient direction, a refrigerating plate and a thermal insulating cavity internally vacuumized and supported through a cushion block are placed on the upper surface and the lower surface of a sample, and flexible thermal insulating layers are arranged along the frozen earth sample height direction in sections, flexible refrigerant circulating pipes are arranged between the thermal insulating layers, the combined temperature gradient of frozen earth in the vertical direction is realized by controlling the air temperature in the temperature control box, the refrigerating plate and the refrigerant temperature in the refrigerant circulating pipe with heat conduction on the contact surfaces of the refrigerating plate and the refrigerant circulating pipe with the frozen earth sample as a primary factor and with convective heat transfer between air and the frozen earth sample in the temperature control box as a secondary factor, an experimental evidence is provided for researching the mechanism of the combined temperature gradient to the frozen earth distortion intensity; meanwhile, the regulation and control precision of a single temperature gradient in frozen earth is improved. The relative components of the method are simple to assemble and operate, and the temperature precision control in frozen earth is high.
Description
Technical field
The present invention relates to the implementation method of thermograde in a kind of frozen soil, the implementation method of combination temp gradient in especially a kind of frozen soil.
Background technology
In frozen soils structure, temperature field can regard as the combination of multiple thermograde on frozen soil space scale, existing experimental technique and laboratory facilities are all easy to realize non-uniform temperature in frozen soil and distribute, but be difficult to realize the combination of accurate thermograde, the requirement of the experimental study of frozen soil change intensity property and failure mechanism under the acting in conjunction of many thermogrades cannot be met.
There are some researches show, in thermograde (single) frozen soil, distortion is in non-uniform Distribution, and frozen soil sample local deformation distribution pattern has strong nonlinearity on Time and place yardstick.The distribution of this local deformation is caused by the interaction of frozen soil microscopic parameter.And the frozen soil of microscopic parameter interacts not only relevant with thermograde, be more controlled by distribution range and the integrated mode of thermograde.Existing is all for single thermograde frozen soil and the frozen soil with different temperatures gradient distribution arrangement about thermograde frozen soil change character research device and method mostly, lacks the method for applicable combination thermograde and many thermogrades frozen soil change field and Evolution research thereof.
Summary of the invention
Goal of the invention: the present invention is the implementation method of combination temp gradient in the frozen soil that will provide a kind of simple possible, solves the inadaptable problem for combination temp gradient frozen soil experiment in existing thermograde frozen soil experiment technology.
Technical scheme: for achieving the above object, technical scheme of the present invention is as follows:
An implementation method for combination temp gradient in frozen soil, in frozen soil, combination temp gradient is realized by vertical temperature gradient frozen soil experiment machine, temperature control box, flexible thermofin and flexible cold mediator circulation pipe; Vertical temperature gradient frozen soil experiment machine be provided with cold plate, in vacuumize with cushion block support heat-insulation chamber, temperature control box is ventilation type, it is respectively equipped with air inlet and air outlet; In temperature control box between air inlet with air outlet air-flow direction and between upper refrigeration and lower cold plate thermograde direction identical; Be provided with flexible cold mediator circulation pipe between the flexible thermofin of segmentation, flexible cold mediator circulation pipe diameter is less than the spacing of flexible thermofin, and the number of fragments of flexible thermofin is identical with thermograde quantity in frozen soil sample; The upper and lower two ends of frozen soil sample only contact with cold plate, and the frozen soil exposed between the flexible thermofin of segmentation contacts with air in temperature control box with flexible cold mediator circulation pipe simultaneously; Combination temp gradient forming process is by cross-ventilation and heat transfer two kinds of mode co-controllings;
Concrete steps are as follows:
A, lay successively on vertical temperature gradient frozen soil experiment machine chassis lower heat-insulation chamber, lower cold plate, frozen soil sample, on cold plate, upper heat-insulation chamber, at the flexible thermofin of frozen soil specimen surface subsection setup, flexible cold mediator circulation pipe is installed in the middle of flexible thermofin, at frozen soil sample installed inside temperature sensor;
B, to vacuumize in heat-insulation chamber, refrigerant agent in circulates temperature controlled case in air, flexible cold mediator circulation pipe and cold plate, the temperature variation of frozen soil sample inside and the distribution along frozen soil specimen height direction thereof is monitored in real time, according to refrigerant agent temperature in monitoring result dynamic conditioning temperature control box air temperature and flexible cold mediator circulation pipe and cold plate by temperature sensor;
C, treat that the temperature sensor of frozen soil sample inside records temperature stabilization, now form stable combination temp gradient along frozen soil specimen height direction, just can carry out follow-up test.
Further, by changing temperature control box air temperature, in flexible cold mediator circulation pipe and cold plate, refrigerant agent temperature controls thermograde in frozen soil, indirectly controls quantity and the distribution range of thermograde in frozen soil sample by changing the high and segments of flexible heat insulation interval.
Beneficial effect, owing to have employed such scheme, by convection current and heat transfer two kinds of refrigeration modes, by step-by-step arrangement thermofin, choose reasonable heat-insulating method, dynamic regulation heat-transfer medium temperature, can realize combining (many) thermogrades in frozen soil sample vertical direction.
1, in frozen soil specimen height, frozen soil sample, the quantity of thermograde and distribution range on pretreatment can random regulable control, in process of the test, thermograde and integrated mode thereof can dynamically change, therefore, the subjects that the method can be simulated is enriched, and test efficiency is high.
2, the test of combination temp gradient frozen soil change is being carried out simultaneously, also the testing requirements of single thermograde frozen soil change can be met, owing to make use of heat transfer and convection current two kinds of heat transfer types, frozen soil sample is higher along the temperature gradient distribution linearity of short transverse, and gained deformation data is more reliable.
Accompanying drawing explanation
Fig. 1 is the constructional device schematic diagram that the present invention realizes combination temp gradient.
In figure, 1, vertical temperature gradient frozen soil experiment machine; 2, ventilation type temperature control box; 3, flexible thermofin; 4, cold plate; 4-1, lower cold plate; 4-2, upper cold plate; 5, air inlet; 6, air outlet; 7, frozen soil sample; 8, temperature sensor; 9, heat-insulation chamber; 9-1, lower heat-insulation chamber; 9-2, upper heat-insulation chamber; 11, thermograde direction; 12, flexible cold mediator circulation pipe.
Embodiment
Below in conjunction with accompanying drawing, 1 couple of the present invention is further described.
In FIG, in frozen soil, combination temp gradient is realized by vertical temperature gradient frozen soil experiment machine 1, ventilation type temperature control box 2, flexible thermofin 3 and flexible cold mediator circulation pipe 12.Vertical temperature gradient frozen soil experiment machine be provided with cold plate 4, in vacuumize with cushion block support heat-insulation chamber 9, ventilation type temperature control box 2 is provided with air inlet 5, air outlet 6 from above; In temperature control box 2, between air inlet 5 with air outlet 6, air-flow direction 10 is identical with upper thermograde direction 11 between 4-2 and lower cold plate 4-1 of freezing; Be provided with flexible cold mediator circulation pipe 12 between the flexible thermofin 3 of segmentation, flexible cold mediator circulation pipe 12 diameter is less than the spacing of flexible thermofin 3, and the number of fragments of flexible thermofin 3 is identical with thermograde quantity in frozen soil sample 7; Frozen soil sample about 7 two ends only contact with cold plate 4, and the frozen soil exposed between the flexible thermofin 3 of segmentation contacts with air in temperature control box 2 with flexible cold mediator circulation pipe 12 simultaneously; Combination temp gradient forming process is by cross-ventilation and heat transfer two kinds of mode co-controllings;
By changing temperature control box 2 air temperature, in flexible cold mediator circulation pipe 12 and cold plate 4, refrigerant agent temperature controls thermograde in frozen soil sample 7, and by the section that changes flexible thermofin 3, high and segments controls quantity and the distribution range of thermograde in frozen soil sample 7 indirectly.
The implementation method of combination temp gradient in frozen soil, it is realized by following detailed step:
A, lay successively on vertical temperature gradient frozen soil experiment machine 1 chassis lower heat-insulation chamber 9-1, lower cold plate 4-1, frozen soil sample 7, on cold plate 4-2, upper heat-insulation chamber 9-2, in frozen soil sample 7 surface segment, flexible thermofin 3 is set, flexible cold mediator circulation pipe 12 is installed in the middle of flexible thermofin 3, at frozen soil sample 7 installed inside temperature sensor 8;
B, to vacuumize in heat-insulation chamber 9, refrigerant agent in circulates temperature controlled case 2 in air, flexible cold mediator circulation pipe 12 and cold plate 4, by the temperature sensor 8 monitoring temperature variation of frozen soil sample 7 inside and the distribution along frozen soil sample 7 short transverse thereof in real time, according to refrigerant agent temperature in monitoring result dynamic conditioning temperature control box 2 air temperature and flexible cold mediator circulation pipe 12 and cold plate 4;
C, treat that the temperature sensor 8 of frozen soil sample 7 inside records temperature stabilization, now form stable combination (many) thermograde along frozen soil sample 7 short transverse, just can carry out follow-up test.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. the implementation method of combination temp gradient in frozen soil, is characterized in that: in frozen soil, combination temp gradient is realized by vertical temperature gradient frozen soil experiment machine, temperature control box, flexible thermofin and flexible cold mediator circulation pipe; Vertical temperature gradient frozen soil experiment machine be provided with cold plate, in vacuumize with cushion block support heat-insulation chamber, temperature control box is ventilation type, it is respectively equipped with air inlet and air outlet; In temperature control box between air inlet with air outlet air-flow direction and between upper refrigeration and lower cold plate thermograde direction identical; Be provided with flexible cold mediator circulation pipe between the flexible thermofin of segmentation, flexible cold mediator circulation pipe diameter is less than the spacing of flexible thermofin, and the number of fragments of flexible thermofin is identical with thermograde quantity in frozen soil sample; The upper and lower two ends of frozen soil sample only contact with cold plate, and the frozen soil exposed between the flexible thermofin of segmentation contacts with air in temperature control box with flexible cold mediator circulation pipe simultaneously; Combination temp gradient forming process is by cross-ventilation and heat transfer two kinds of mode co-controllings;
Concrete steps are as follows:
A, lay successively on vertical temperature gradient frozen soil experiment machine chassis lower heat-insulation chamber, lower cold plate, frozen soil sample, on cold plate, on heat-insulation chamber, at the flexible thermofin of frozen soil specimen surface subsection setup, flexible cold mediator circulation pipe is installed in the middle of flexible thermofin, at frozen soil sample installed inside temperature sensor;
B, to vacuumize in heat-insulation chamber, refrigerant agent in circulates temperature controlled case in air, flexible cold mediator circulation pipe and cold plate, the temperature variation of frozen soil sample inside and the distribution along frozen soil specimen height direction thereof is monitored in real time, according to refrigerant agent temperature in monitoring result dynamic conditioning temperature control box air temperature and flexible cold mediator circulation pipe and cold plate by temperature sensor;
C, treat that the temperature sensor of frozen soil sample inside records temperature stabilization, now form stable combination temp gradient along frozen soil specimen height direction, just can carry out follow-up test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410470342.XA CN104215749B (en) | 2014-09-15 | 2014-09-15 | The implementation method of combination temp gradient in a kind of frozen soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410470342.XA CN104215749B (en) | 2014-09-15 | 2014-09-15 | The implementation method of combination temp gradient in a kind of frozen soil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104215749A true CN104215749A (en) | 2014-12-17 |
| CN104215749B CN104215749B (en) | 2015-08-26 |
Family
ID=52097463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410470342.XA Expired - Fee Related CN104215749B (en) | 2014-09-15 | 2014-09-15 | The implementation method of combination temp gradient in a kind of frozen soil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104215749B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241753A (en) * | 2015-07-06 | 2016-01-13 | 河北工程大学 | Apparatus and method of hydraulic lining concrete compression test under controllable temperature gradient |
| CN106226499A (en) * | 2016-08-30 | 2016-12-14 | 中国科学院寒区旱区环境与工程研究所 | A kind of frozen soil experiment device of combination temp gradient |
| CN108572189A (en) * | 2018-05-15 | 2018-09-25 | 青岛理工大学 | Static and dynamic comprehensive test system considering soil body expansion and contraction characteristics under temperature gradient |
| CN109827827A (en) * | 2019-04-03 | 2019-05-31 | 安徽理工大学 | A kind of apparatus and method constructing frozen soil sample for making the cold life of stratiform |
| CN110595869A (en) * | 2019-10-29 | 2019-12-20 | 上海映晓电子科技有限公司 | Equipment for preparing frozen soil sample based on contact heat conduction technology in vacuum environment |
| CN111157361A (en) * | 2020-01-06 | 2020-05-15 | 中国矿业大学 | Torsion shear test machine matched with CT scanner and using method thereof |
| CN111997595A (en) * | 2020-08-06 | 2020-11-27 | 中国科学院广州能源研究所 | Natural gas hydrate geological layering device and method |
| CN114235597A (en) * | 2021-11-01 | 2022-03-25 | 安徽理工大学 | Frozen soil true triaxial rigid loading mold based on temperature gradient and operation method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201508503U (en) * | 2009-08-21 | 2010-06-16 | 济宁凯伦光伏材料有限公司 | Control device for multilayer temperature gradients |
| CN101915627A (en) * | 2010-07-08 | 2010-12-15 | 中国水利水电科学研究院结构材料研究所 | Method for detecting temperature distribution, temperature gradient, thermal insulation effect and local solar radiant heat of concrete structure |
| CN103091180A (en) * | 2013-01-11 | 2013-05-08 | 中国矿业大学 | Uniaxial creep testing device and method for frozen earth with temperature gradient |
| CN103364266A (en) * | 2013-07-24 | 2013-10-23 | 中国矿业大学 | Two-dimensional temperature gradient frozen soil test device and use method thereof |
-
2014
- 2014-09-15 CN CN201410470342.XA patent/CN104215749B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201508503U (en) * | 2009-08-21 | 2010-06-16 | 济宁凯伦光伏材料有限公司 | Control device for multilayer temperature gradients |
| CN101915627A (en) * | 2010-07-08 | 2010-12-15 | 中国水利水电科学研究院结构材料研究所 | Method for detecting temperature distribution, temperature gradient, thermal insulation effect and local solar radiant heat of concrete structure |
| CN103091180A (en) * | 2013-01-11 | 2013-05-08 | 中国矿业大学 | Uniaxial creep testing device and method for frozen earth with temperature gradient |
| CN103364266A (en) * | 2013-07-24 | 2013-10-23 | 中国矿业大学 | Two-dimensional temperature gradient frozen soil test device and use method thereof |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105241753A (en) * | 2015-07-06 | 2016-01-13 | 河北工程大学 | Apparatus and method of hydraulic lining concrete compression test under controllable temperature gradient |
| CN106226499A (en) * | 2016-08-30 | 2016-12-14 | 中国科学院寒区旱区环境与工程研究所 | A kind of frozen soil experiment device of combination temp gradient |
| CN106226499B (en) * | 2016-08-30 | 2018-08-24 | 中国科学院寒区旱区环境与工程研究所 | A kind of frozen soil experiment device of combination temp gradient |
| CN108572189A (en) * | 2018-05-15 | 2018-09-25 | 青岛理工大学 | Static and dynamic comprehensive test system considering soil body expansion and contraction characteristics under temperature gradient |
| CN109827827A (en) * | 2019-04-03 | 2019-05-31 | 安徽理工大学 | A kind of apparatus and method constructing frozen soil sample for making the cold life of stratiform |
| CN109827827B (en) * | 2019-04-03 | 2021-05-18 | 安徽理工大学 | Device and method for manufacturing frozen soil sample of layered cold-growing structure |
| CN110595869A (en) * | 2019-10-29 | 2019-12-20 | 上海映晓电子科技有限公司 | Equipment for preparing frozen soil sample based on contact heat conduction technology in vacuum environment |
| CN111157361A (en) * | 2020-01-06 | 2020-05-15 | 中国矿业大学 | Torsion shear test machine matched with CT scanner and using method thereof |
| CN111997595A (en) * | 2020-08-06 | 2020-11-27 | 中国科学院广州能源研究所 | Natural gas hydrate geological layering device and method |
| CN114235597A (en) * | 2021-11-01 | 2022-03-25 | 安徽理工大学 | Frozen soil true triaxial rigid loading mold based on temperature gradient and operation method |
| CN114235597B (en) * | 2021-11-01 | 2023-09-29 | 安徽理工大学 | Frozen soil true triaxial rigid loading mold based on temperature gradient and operation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104215749B (en) | 2015-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104215749B (en) | The implementation method of combination temp gradient in a kind of frozen soil | |
| Ma et al. | Cooling performance of a pump-driven two phase cooling system for free cooling in data centers | |
| Nielsen et al. | A comprehensive parameter study of an active magnetic regenerator using a 2D numerical model | |
| Amini et al. | Experimental study of frost formation on a fin-and-tube heat exchanger by natural convection | |
| CN102156492B (en) | Temperature control system for large-space laboratory | |
| CN104617008A (en) | Wafer heating device | |
| Senjaya et al. | Effects of non-condensable gas on the performance of oscillating heat pipe, part II: Experimental study | |
| CN110082137B (en) | Device and method for testing heat leakage load of different parts of refrigerator | |
| CN204925002U (en) | Frozen soil coefficient of heat conductivity apparatus | |
| CN205607902U (en) | Metal heat preservation plate thermal insulation performance detection device | |
| CN201527376U (en) | Air-blowing cooling device | |
| Erden et al. | Experimental investigation of CRAH bypass for enclosed aisle data centers | |
| CN105259208A (en) | Heat performance test device and method for heat pipe under vacuum | |
| CN104266840A (en) | Deep thermal shock testing device of heavy-duty engine | |
| CN106292767B (en) | Subregion temperature-controlling system and device | |
| CN206684125U (en) | A kind of hot jacket air circulation lightweight vacuum simulation test device | |
| RU2564056C1 (en) | Method of heat-vacuum test of spacecraft | |
| CN107085009B (en) | Performance test device for heat pipe exchanger | |
| CN203083832U (en) | Energy-recovery full fresh air air-handling unit performance testing device | |
| Torregrosa-Jaime et al. | An efficient numerical scheme for the simulation of parallel-plate active magnetic regenerators | |
| CN105571954A (en) | Tensile test device for insulator | |
| CN104964994A (en) | Two-box asynchronous concrete freezing-thawing test device and test method | |
| CN220214984U (en) | Heat exchange structure of wall of test box | |
| CN110045096B (en) | Test device and method for evaluating concrete cracking caused by temperature gradient | |
| CN207908021U (en) | A kind of Laboratory Module for flowmeter high temperature performance dynamic test |
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: 20150826 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |