CN105183029A - Frozen soil hollow cylinder apparatus pressure chamber temperature control device - Google Patents
Frozen soil hollow cylinder apparatus pressure chamber temperature control device Download PDFInfo
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- CN105183029A CN105183029A CN201510621972.7A CN201510621972A CN105183029A CN 105183029 A CN105183029 A CN 105183029A CN 201510621972 A CN201510621972 A CN 201510621972A CN 105183029 A CN105183029 A CN 105183029A
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Abstract
The present invention relates to a frozen soil hollow cylinder pressure chamber temperature control system. The frozen soil hollow cylinder pressure chamber temperature control system is characterized in that a double helix cold bath circulating slot is carved on the outer wall of a pressure chamber, and the temperature of a pressure-bearing heat-transfer medium in the pressure chamber is reduced circularly in the cold bath circulating slot; an inverted U-shaped copper tube and a temperature sensor are arranged in the inner cavity of a hollow cylinder sample, and three temperature sensors are distributed at the upper, middle and lower positions of the outer wall of the sample; the middle temperature sensor feeds back the temperature data to a cold bath controller while monitoring the temperature change of the middle position, and the upper and lower temperature sensors monitor the temperature fluctuation of the corresponding positions; the pressure chamber is equipped with the upper and lower cooling plates to reduce the heat exchange of the pressure-bearing heat-transfer medium in the inner cavity of the pressure chamber with the outside world, and the temperature of the pressure chamber is adjusted by the cold bath movement in the cooling plates. A frozen soil hollow cylinder apparatus pressure chamber temperature control device of the present invention enables the sample to be cooled rapidly, guarantees the uniform and constant temperature of the sample during the whole test period, is not influenced by the outside world and indoor temperature change, and provides the technical guarantee for revealing the mechanical property of the frozen soil under the action of the complicated stress paths.
Description
Technical field
The present invention relates to a kind of frozen soil experiment with hollow cylinder apparatus pressure chamber temperature control equipment, namely frozen soil carries out the test unit of indoor mechanics parameter test under complicated stress environment condition.Utilize this device, in the dynamic and static loading of experiment with hollow cylinder apparatus and the cooling and the thermostatic process that realize frozen soil hollow cylinder in loading procedure can be reversed, thus make sample reach temperature accuracy condition required by mechanical test, the final accuracy ensureing frozen soil mechanics parametric measurement.
Background technology
Soil body proterties is subject to the impact of stress path, ideally only has the complete Reality simulation loading procedure of shop experiment condition, could react the true response of the soil body, especially true under dynamic condition.Modal several dynamic load in cold regions engineering construction, as earthquake load, traffic loading etc. all relate to the complicated stress environment of multiaxial stress and principal stress axis rotation, this just requires to understand the response pattern of frozen soil body under complex stress condition, thus sets up the more scientific Constitutive Model of Frozen Soil considering Various Complex factor.Usually, dynamic triaxial apparatus can only apply cyclic shearing stress, at sample 45
oinclined-plane is simulated horizontal earthquake to shear action; And dynamic torsion shear apparatus, moment of torsion can only be applied to simulate stress state during pure shear.Earthquake load and traffic loading belong to nonproportional cyclic loading, total deviatoric shear is subject to the combined effect of normal stress deviation (difference of vertical and horizontal normal stress) and shear stress simultaneously, and the principal axes of stress in the frozen soil body of building lot in time and spatially continuous rotation, for the distortion of frozen soil and strength characteristics, there is significant impact.So application hollow cylinder pilot system can realize pressure, external pressure, xial feed and moment of torsion in independent applying, can the size and Orientation of independent variation three principle stresses, thus realize the rotation of principle stress.
Existing frozen soil experiment with hollow cylinder apparatus pressure chamber adopts built-in copper tube, utilizes the circulation of cryostat in copper tube to reduce the temperature of pressure chamber.Because this method does not consider the bearing capacity of copper tube and the heat interchange of pressure chamber's upper and lower side and surrounding environment, thus causing copper tube be crushed under high pressure effect and cannot work, pressure chamber's internal temperature homogeneity is very poor, and (sample upper and lower temperature difference is all the time ± 1
omore than C), and larger by environment temperature day and night fluctuation amplitude.Defects in these designs make existing frozen soil experiment with hollow cylinder apparatus cannot carry out the experimental study of frozen soil mechanics character under complicated stress environment condition.
Summary of the invention
In view of above-mentioned, the object of the present invention is to provide a kind of frozen soil experiment with hollow cylinder apparatus pressure chamber temperature control equipment.This device has that pressure-bearing is high, temperature can regulate automatically and the feature that temperature-controlled precision is higher.This device is utilized not only can evenly to freeze to the required low-temperature condition of test to hollow cylinder sample, and temperature homogeneity spatially and the stability of time of hollow cylinder sample can be ensured, thus meet the requirement of frozen soil mechanics test to temperature accuracy.For the frozen soil mechanics character research carried out further under the complicated stress environment conditions such as principle stress rotation provides strong technology to ensure.
The object of the invention is to be realized by following measures:
A kind of frozen soil experiment with hollow cylinder apparatus pressure chamber temperature control equipment, comprise stainless steel pressure room, hollow cylinder sample, temperature sensor, seaming chuck, push-down head, plastics adapter, stainless steel lower bottom base, heat insulation bottom board, inverted U-shaped copper tube, pressure-bearing heat transfer medium, the cold liquid circulation groove of double helix, heat-insulation layer, testing machine transmission rod, cryostat, data acquisition system (DAS), pressure chamber's support bar, pore water pressure sensor, inner chamber oil hole, exocoel oil hole, permeable stone, O-ring seal, latex film inside and outside sample, ventilating drainage hole, connect plastic flexible pipe, signalling channel, fixed screw holes, water injection hole, upper cold drawing, lower cold drawing, sensor socket, seal groove, inserted tooth and cryostat circulation groove.Hollow cylinder sample is positioned in pressure chamber's center base, and the inner chamber pressure-bearing heat transfer medium all abrim of pressure chamber and hollow cylinder sample, the inside and outside wall of hollow cylinder sample is wrapped in latex film, and hollow cylinder sample inside and outside wall and pressure-bearing heat transfer medium are isolated; There are an inverted U-shaped thick-wall red copper pipe and a temperature sensor in hollow cylinder sample center, wherein copper tube is connected with an outside cryostat, for controlling the temperature of hollow cylinder sample inner chamber pressure-bearing heat transfer medium, temperature sensor can be measured the temperature of this pressure-bearing heat transfer medium and temperature signal be passed to cryostat, controls cryostat circulating temperature; Be close to position, hollow cylinder sample outer wall upper, middle and lower and be evenly arranged three temperature sensors, wherein, upper temperature sensor and lower temperature sensor are for measuring the temperature of pressure-bearing heat transfer medium in pressure chamber, middle portion temperature sensor, for measuring pressure-bearing heat-transfer medium temperature and temperature signal being passed to cryostat, controls cryostat circulating temperature.Seaming chuck with inserted tooth and push-down head lay respectively at the upper/lower terminal of hollow cylinder sample, have a circular permeable stone between two inserted tooths; Have an aperture under each permeable stone, all apertures all pass through to connect plastic flexible pipe and are connected with pore water pressure sensor with the ventilating drainage hole of lower bottom base, for the preparation of saturated hollow cylinder sample; Be stainless steel base below push-down head, push-down head and stainless steel base contacts place establish a seal groove.Stainless steel base is furnished with inner chamber oil hole, exocoel oil hole, ventilating drainage hole, pore water pressure sensor, water injection hole, signalling channel, sensor jack, fixed screw holes respectively; Stainless steel base is positioned on the lower cold drawing of adjustable control temperature, lower cold drawing is carved with cryostat circulation groove, and leaves signalling channel and fixed screw holes, and heat insulation bottom board is positioned at the below of lower cold drawing, be highstrenghtpiston's adapter above seaming chuck, between seaming chuck and adapter, be provided with seal groove; Testing machine transmission rod directly contacts with adapter, and testing machine transmission rod is established an O-ring seal, under the prerequisite of warranty test machine transmission rod and pressure chamber's close contact, can also move up and down freely; All temperature sensors are all connected with lower bottom base upper sensor socket and are connected with external data acquisition system by signalling channel; Lower cold drawing, heat insulation bottom board successively under lower bottom base; Pressure chamber's outer wall is carved with double helix cold liquid circulation groove and connects with extraneous cryostat, and pressure chamber's outer wall is provided with heat-insulation layer, and top, whole pressure chamber is connected with the hydraulic jack be positioned under operator's console by two support bars.
The beneficial effect of advantage of the present invention and generation is:
1, the cold liquid circulation passage of double helix is positioned at stainless steel pressure chamber outer wall, wherein liquid right-hand circular in a passage, liquid left-hand circular in another passage, thus while ensureing cryostat comparatively smooth and easy circulation wherein, also fully ensure that the homogeneity of each temperature in pressure chamber, namely eliminate the thermograde of pressure-bearing heat transfer medium in the pressure chamber that causes due to one-way circulation; The stainless steel pressure room of certain wall thickness, good seal performance, high insulating effect, this pressure chamber not only has good heat transfer property and automatically regulates, the function of control temperature, and meets the requirement of bearing capacity.
2, the cooling-down effect that in pressure chamber, the design of cold drawing and lower cold drawing not only can make pressure chamber reach comprehensively overall, and heat can be completely cut off in pressure chamber by seaming chuck and stainless steel base and external environment generation heat interchange.Guarantee that pressure chamber's temperature reaches the target temperature designed by us, and keep constant, even.
3, seaming chuck stainless steel adapter is changed to highstrenghtpiston's adapter, and lower cold drawing is placed on highstrenghtpiston's backing plate, prevent the heat interchange of sample itself and pressure chamber's pressure-bearing heat transfer medium and external environment further.
4, four platinum resistance temperature sensors in pressure chamber, wherein two temperature sensors (one be positioned at pressure chamber's inner chamber, one be positioned in the middle part of pressure chamber's exocoel) connect with cryostat, make it while monitoring inside and outside pressure chamber temperature, monitor signal is passed to cryostat controller, automatic adjustment cryostat temperature, external and internal pressure room temperature is made to reach target temperature set by us, and other two temperature variation laying respectively at the whole pressure chamber of temperature sensor Real-Time Monitoring of exocoel top and the bottom, pressure chamber.By above measure, namely obtain the dynamic changing process of pressure chamber's temperature, Ye Shi pressure chamber temperature reaches target setting temperature and keeps constant.
5, utilize existing hollow cylinder testing machine loading principle, just can be sample and load.In conjunction with pressure chamber's temperature regulating device of design, the monitoring of frozen soil specimen temperature in the Experimental Study On Mechanical Properties of frozen soil under complicated stress environment condition and process of the test thereof can be realized, for the force model character research carrying out frozen soil in a deep going way provides test platform and strong technical support.
6, structure of the present invention is simple, easy to operate, applicability wide, not by the restriction of load mode.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 be Fig. 1 frozen soil experiment with hollow cylinder apparatus on cold drawing schematic diagram;
Fig. 3 is cold drawing schematic diagram under the frozen soil experiment with hollow cylinder apparatus of Fig. 1;
Fig. 4 is the frozen soil experiment with hollow cylinder apparatus stainless steel lower bottom base schematic diagram of Fig. 1;
Fig. 5 be Fig. 1 frozen soil experiment with hollow cylinder apparatus on push-down head front view
Fig. 6 is the vertical view of Fig. 5;
Fig. 7 pressure chamber pressure-bearing heat transfer medium diverse location temperature changing process figure.
In figure:
Cold drawing 30-sensor socket 31-seal groove 32-inserted tooth 33-cryostat circulation groove under cold drawing 29-on the 24-plastic flexible pipe 25-data signal channel 26-fixed screw holes 27-water injection hole 28-of latex film 23-ventilating drainage hole inside and outside 1-stainless steel pressure room 2-hollow cylinder sample 3-temperature sensor 3 '-temperature sensor 3 ' '-temperature sensor 3 ' ' '-temperature sensor 4-seaming chuck 5-push-down head 6-adapter 7-lower bottom base 8-heat insulation bottom board 9-inverted U-shaped copper tube 10-pressure-bearing heat transfer medium 11-double helix cold liquid circulation groove 12-heat-insulation layer 13-testing machine transmission rod 14-cryostat 15-data acquisition system (DAS) 16-pressure chamber support bar 17-pore water pressure sensor 18-inner chamber oil hole 19-exocoel oil hole 20-permeable stone 21-O-ring seal 22-sample.
Embodiment
By reference to the accompanying drawings, the present invention is described in further detail by actual measurement example again:
As shown in figures 1 to 6, a kind of frozen soil experiment with hollow cylinder apparatus pressure chamber temperature control equipment, comprise stainless steel pressure room 1, hollow cylinder sample 2, temperature sensor 3, seaming chuck 4, push-down head 5, plastics adapter 6, stainless steel lower bottom base 7, heat insulation bottom board 8, inverted U-shaped copper tube 9, pressure-bearing heat transfer medium 10, the cold liquid circulation groove 11 of double helix, heat-insulation layer 12, testing machine transmission rod 13, cryostat 14, data acquisition system (DAS) 15, pressure chamber's support bar 16, pore water pressure sensor 17, inner chamber oil hole 19, exocoel oil hole 19, permeable stone 20, O-ring seal 21, latex film 22 inside and outside sample, ventilating drainage hole 23, connect plastic flexible pipe 24, signalling channel 25, fixed screw holes 26, water injection hole 27, upper cold drawing 28, lower cold drawing 29, sensor socket 30, seal groove, inserted tooth 32 and cryostat circulation groove 33.Hollow cylinder sample 2 is positioned at the thick center, stainless steel pressure room 1 of 4cm, and the inner chamber pressure-bearing heat transfer medium 10 all abrim of pressure chamber 1 and hollow cylinder sample 2, pressure is passed to sample by this pressure-bearing heat transfer medium.The inside and outside wall of hollow cylinder sample 2 is wrapped in latex film 22, hollow cylinder sample 2 inside and outside wall and pressure-bearing heat transfer medium 10 are isolated; There is inverted U-shaped thick-wall red copper pipe 9 and a temperature sensor 3 at hollow cylinder sample 2 center, low temperature cryostat is had to be cycled to used in the temperature of reduction sample inner chamber pressure-bearing heat transfer medium 10 in inverted U-shaped copper tube 9, temperature sensor 3, for measuring the temperature of sample inner chamber medium and temperature data being fed back to cryostat 14, regulates cryostat 14 temperature to reach target temperature.Seaming chuck 4 with inserted tooth 32 and push-down head 5 lay respectively at the upper/lower terminal of hollow cylinder sample 2, and the effect of inserted tooth 32 is that hollow cylinder sample 2 is reversed along with the torsion of upper push-down head; Owing to considering that drainage problem mended by sample, between seaming chuck 4 and two inserted tooths of push-down head 5, there is a circular permeable stone 20; Each permeable stone has an aperture 20 times, and all apertures all pass through to connect plastic flexible pipe 24 and are connected with pore water pressure sensor 17 with the ventilating drainage hole 23 of lower bottom base 7, for the preparation of saturated hollow cylinder sample 2.Be stainless steel base 7 below push-down head 5, a seal groove 31 is established in push-down head 5 and stainless steel base 7 contact position, avoids pressure-bearing heat transfer medium 10 to infiltrate hollow cylinder sample 2 under high pressure effect.Stainless steel base 7 is furnished with inner chamber oil hole 18, exocoel oil hole 19, ventilating drainage hole 23, pore water pressure sensor 17, water injection hole 27, signalling channel 25, sensor jack 30, fixed screw holes 26 respectively; Lower bottom base 7 is positioned on the lower cold drawing 29 of temperature-adjustable, cryostat not only can stop specimen temperature to carry out heat interchange by base and the external world along moving of circulation groove 33, but also pressure chamber 1 homogeneous temperature can be made, make specimen temperature in whole process of the test, keep the homogeneity in space and the stability of time; Heat insulation bottom board 8 is positioned at the below of lower cold drawing 29, reduces and stops the heat interchange of pressure chamber 1, lower cold drawing 29 and external operation platform.Be highstrenghtpiston's adapter 6 and upper cold drawing 28 above seaming chuck 4, be provided with seal groove 31 between seaming chuck 4 and adapter 6, adapter 6 directly contacts with testing machine transmission rod 13; Not only completely cut off hollow cylinder sample 2 temperature by testing machine transmission rod 13 and extraneous heat interchange by adapter 6, and testing machine applied pressure and moment of torsion can be passed to sample hollow cylinder soil sample 2; Testing machine transmission rod 13 is established an O-ring seal 21, namely ensure combining closely of transmission rod and upper cold drawing, the pressure-bearing heat transfer medium 10 of prevention pressure chamber 1 inner chamber oozes out under stress, and warranty test machine transmission rod 13 moves up and down again.Be close to position, hollow cylinder sample 2 outer wall upper, middle and lower be evenly arranged temperature sensor 3', temperature sensor 3 ' ' and temperature sensor 3 ' ' ', wherein, upper temperature sensor 3 ' and lower temperature sensor 3 ' ' ' for measuring the temperature of pressure-bearing heat transfer medium 10 in pressure chamber 1, middle portion temperature sensor 3 ' ' for measuring the temperature of pressure-bearing heat transfer medium 10 and temperature signal being passed to the temperature that cryostat 14 regulates cryostat to circulate; All temperature sensors are all connected with lower bottom base 7 upper sensor socket 30 and are connected with external data acquisition system 15 by signalling channel 25; Lower cold drawing 29, heat insulation bottom board 8 successively under lower bottom base 7; All testing elements are all placed in the stainless steel pressure room 1 of 4cm thickness above, pressure chamber 1 outer wall is carved with double helix cold liquid circulation groove 11 and connects with extraneous cryostat 14, cryostat is moved in pressure chamber's outer wall cryostat Two-way Cycle groove 11, the heat in pressure chamber can be taken away, reduce the temperature of pressure-bearing heat transfer medium 10, thus reduce the environment temperature of pressure chamber and hollow cylinder sample 2 is freezed.Pressure chamber 1 outer wall is provided with the thick heat-insulation layer of 6cm 12, with the inner heat interchange with external environment in this isolated pressure chamber 1 itself and pressure chamber; Whole pressure chamber 1 is connected with the hydraulic jack be positioned under operator's console by Liang Gen pressure chamber support bar 16, thus the lifting of controlled pressure room.
The present invention carries out hollow cylinder soil sample 2 and tests in pressure chamber 1.Hollow cylinder soil sample 2 for water percentage be 16%, dry density 1.9g/cm
3qinghai-Tibet silty clay hollow cylinder sample.In process of the test, hollow cylinder soil sample is cooled to-30
oc, is then warming up to-20
oC, in 42 hours, observe cooling capacity and the temperature control ability of this pressure chamber.Test findings as shown in Figure 7.Fig. 7 shows, pressure chamber's temperature is in cooling after 7 hours, and temperature reaches constant, each measuring point fluctuation range is in time less than ± and 0.05
oc.The temperature that temperature reaches stable hollow cylinder sample outer wall upper, middle and lower and internal temperature probe is later respectively-19.85
oc ,-19.82
oc ,-19.84
oc ,-19.95
oc, temperature gradient is less than ± and 0.1
oc.Prove that this pressure chamber meets the accuracy requirement of frozen soil mechanics test temperature control thus.
Claims (2)
1. a frozen soil hollow cylinder pressure chamber temperature control equipment, comprises stainless steel pressure room (1), hollow cylinder sample (2), temperature sensor (3), seaming chuck (4), push-down head (5), highstrenghtpiston's adapter (6), lower bottom base (7), heat insulation bottom board (8), inverted U-shaped copper tube (9), pressure-bearing heat transfer medium (10), the cold liquid circulation groove (11) of double helix, heat-insulation layer (12), testing machine transmission rod (13), cryostat (14), data acquisition system (DAS) (15), pressure chamber's support bar (16), pore water pressure sensor (17), inner chamber oil hole (18), exocoel oil hole (19), permeable stone (20), O-ring seal (21), latex film (22) inside and outside sample, ventilating drainage hole (23), connect plastic flexible pipe (24), signalling channel (25), fixed screw holes (26), water injection hole (27), upper cold drawing (28), lower cold drawing (29), sensor socket (30), seal groove (31), inserted tooth (32), cryostat circulation groove (33), is characterized in that hollow cylinder sample (2) is positioned at the center of pressure chamber (1), and the inner chamber pressure-bearing heat transfer medium (10) all abrim of pressure chamber (1) and hollow cylinder sample (2), in hollow cylinder sample (2), outer wall is wrapped in latex film (22), hollow cylinder sample (2) inside and outside wall and pressure-bearing heat transfer medium (10) are isolated, there are an inverted U-shaped thick-wall red copper pipe (9) and a temperature sensor (3) in hollow cylinder sample (2) center, the seaming chuck (4) of band inserted tooth (32) and push-down head (5) lay respectively at the upper/lower terminal of hollow cylinder sample (2), have a circular permeable stone (20) between two inserted tooths, each permeable stone has an aperture under (20), and all apertures all pass through to connect plastic flexible pipe (24) and are connected with pore water pressure sensor (17) with the ventilating drainage hole (23) of lower bottom base (7), for the preparation of saturated hollow cylinder sample (2), push-down head (5) below is stainless steel base (7), a seal groove (31) is established in push-down head (5) and stainless steel base (7) contact position, and stainless steel base (7) is furnished with inner chamber oil hole (18), exocoel oil hole (19), ventilating drainage hole (23), pore water pressure sensor (17), water injection hole (27), signalling channel (25), sensor jack (30), fixed screw holes (26) respectively, the lower cold drawing (29) of temperature-adjustable is positioned under stainless steel base (7), and lower cold drawing (29) is carved with cryostat circulation groove (33), and leaves signalling channel (25) and fixed screw holes (26), heat insulation bottom board (8) is positioned at the below of lower cold drawing (29), seaming chuck (4) top is highstrenghtpiston's adapter (6), is provided with seal groove (31) between seaming chuck (4) and adapter (6), testing machine transmission rod (13) directly contacts with adapter (6), testing machine transmission rod (13) is established an O-ring seal (21), be used for the sealing between testing machine transmission rod (13) and upper cold drawing (28) on the one hand, warranty test machine transmission rod (13) can move up and down freely on the other hand, pressure chamber (1) outer wall is carved with double helix cold liquid circulation groove (11) and connects with extraneous cryostat (14), pressure chamber (1) outer wall is provided with heat-insulation layer (12), and whole pressure chamber (1) is connected with the hydraulic jack be positioned under operator's console by two support bars (16).
2. a kind of frozen soil hollow cylinder pressure chamber according to claim 1 temperature control equipment, be close on hollow cylinder sample (2) outer wall, in, (3') upper/lower positions is evenly arranged temperature sensor, temperature sensor (3 ' ') and temperature sensor (3 ' ' '), it is characterized in that upper temperature sensor (3 ') and lower temperature sensor (3 ' ' ') are for measuring the temperature of the interior pressure-bearing heat transfer medium (10) in pressure chamber (1), middle portion temperature sensor (3 ' ') is for measuring pressure-bearing heat-transfer medium temperature (10) and temperature signal being passed to cryostat (14), all temperature sensors are all connected with lower bottom base (7) upper sensor socket (30), and be connected with external data acquisition system (15) by signalling channel (25).
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| CN106645637A (en) * | 2016-11-21 | 2017-05-10 | 重庆大学 | Freeze thawing thermal cycle tri-axial seepage multifunctional pressure chamber for geotechnical material |
| CN106769563A (en) * | 2016-12-12 | 2017-05-31 | 中国科学院武汉岩土力学研究所 | The Triaxial tester and its method of soil body Frozen-thawed cycled dynamic load coupling |
| CN107014685A (en) * | 2017-04-14 | 2017-08-04 | 南京林业大学 | The Triaxial tester and its test method of a kind of achievable local temperature control |
| CN108344643A (en) * | 2018-02-02 | 2018-07-31 | 中国矿业大学 | A kind of three-axis force experimental rig and method that can simulate buried Artificial Frozen Soil formation condition |
| CN109187215A (en) * | 2018-09-30 | 2019-01-11 | 中国矿业大学 | A kind of sea area hydrate in-situ preparation and triaxial tests pressure chamber and its application method |
| CN109212159A (en) * | 2017-06-29 | 2019-01-15 | 中国科学院寒区旱区环境与工程研究所 | A kind of multi-parameter frozen soil on-site rapid detection device and its detection method |
| CN110132719A (en) * | 2019-06-05 | 2019-08-16 | 青岛理工大学 | The geotechnological deformable large scale soil box structure of true triaxial test |
| CN113405937A (en) * | 2021-06-15 | 2021-09-17 | 西南交通大学 | Tunnel surrounding soil body frost heaving rate testing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106645637A (en) * | 2016-11-21 | 2017-05-10 | 重庆大学 | Freeze thawing thermal cycle tri-axial seepage multifunctional pressure chamber for geotechnical material |
| CN106645637B (en) * | 2016-11-21 | 2019-01-22 | 重庆大学 | Three axis seepage flow multifunctional compression chamber of rock-soil material freeze thawing thermal cycle |
| CN106769563A (en) * | 2016-12-12 | 2017-05-31 | 中国科学院武汉岩土力学研究所 | The Triaxial tester and its method of soil body Frozen-thawed cycled dynamic load coupling |
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| CN109212159A (en) * | 2017-06-29 | 2019-01-15 | 中国科学院寒区旱区环境与工程研究所 | A kind of multi-parameter frozen soil on-site rapid detection device and its detection method |
| CN109212159B (en) * | 2017-06-29 | 2024-02-23 | 中国科学院西北生态环境资源研究院 | Multi-parameter frozen soil on-site rapid detection device and detection method thereof |
| CN108344643A (en) * | 2018-02-02 | 2018-07-31 | 中国矿业大学 | A kind of three-axis force experimental rig and method that can simulate buried Artificial Frozen Soil formation condition |
| CN109187215A (en) * | 2018-09-30 | 2019-01-11 | 中国矿业大学 | A kind of sea area hydrate in-situ preparation and triaxial tests pressure chamber and its application method |
| CN110132719A (en) * | 2019-06-05 | 2019-08-16 | 青岛理工大学 | The geotechnological deformable large scale soil box structure of true triaxial test |
| CN113405937A (en) * | 2021-06-15 | 2021-09-17 | 西南交通大学 | Tunnel surrounding soil body frost heaving rate testing device |
| CN113405937B (en) * | 2021-06-15 | 2022-05-03 | 西南交通大学 | Tunnel surrounding soil body frost heaving rate testing device |
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| CN105183029B (en) | 2018-03-20 |
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Effective date of registration: 20200810 Address after: 730000 No.318, Donggang West Road, Chengguan District, Lanzhou City, Gansu Province Patentee after: NORTHWEST INSTITUTE OF ECO-ENVIRONMENT AND RESOURCES, CAS Address before: Chengguan District of Gansu city of Lanzhou province Donggang West Road 730000 No. 320 Patentee before: Institute of environment and Engineering in cold and dry areas, Chinese Academy of Sciences |