CN103884581A - Hollow frozen soil testing device and using method thereof - Google Patents
Hollow frozen soil testing device and using method thereof Download PDFInfo
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- CN103884581A CN103884581A CN201410112371.9A CN201410112371A CN103884581A CN 103884581 A CN103884581 A CN 103884581A CN 201410112371 A CN201410112371 A CN 201410112371A CN 103884581 A CN103884581 A CN 103884581A
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- 239000002689 soil Substances 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 title abstract description 14
- 238000005057 refrigeration Methods 0.000 claims abstract description 32
- 239000012528 membrane Substances 0.000 claims description 64
- 239000002826 coolant Substances 0.000 claims description 34
- 230000002093 peripheral effect Effects 0.000 claims description 32
- 239000003507 refrigerant Substances 0.000 claims description 26
- 238000002474 experimental method Methods 0.000 claims description 20
- 238000009434 installation Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000012669 compression test Methods 0.000 abstract description 3
- 239000000110 cooling liquid Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 9
- 238000011160 research Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 241000612118 Samolus valerandi Species 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a hollow frozen soil test device and a using method thereof.A pressure chamber is arranged on a base, a lower cushion block, a lower sample cap ring, a hollow frozen soil sample, an upper sample cap ring, an upper cushion block and a piston are sequentially arranged in the pressure chamber from bottom to top, the top of the pressure chamber is provided with a piston hole, and the piston passes through the piston hole and is contacted with the upper cushion block; the inner and outer rubber films are in close contact with the wall of the hollow frozen soil sample, the refrigeration medium is connected with confining pressure control equipment through an inner pressure channel and an outer pressure channel, a cooling liquid circulation channel is connected with temperature control equipment, and a temperature sensor is arranged in the refrigeration medium. After the radial temperature gradient of the hollow frozen soil sample meets the test requirements and is stable, the compression test, the shear test and the creep test of the radial temperature gradient hollow frozen soil sample can be realized, a basis is provided for further researching the influence of the temperature gradient on the strength and the deformation of the frozen soil, and the method is convenient to operate and low in price.
Description
Technical field
The present invention relates to a kind of hollow frozen soil experiment device and using method thereof, relate in particular to frozen soil experiment device and using method thereof under a kind of radial symmetry gradient boundary condition.
Background technology
Frozen soil is a kind of temperature lower than 0 DEG C and the Special Rock layer that contains ice, and temperature variation is very responsive to external world.At present mainly concentrate on uniform temperature frozen soil for the research of frozen soil, obtained intensity temperature and reduced and the common recognition of increase.Natural Frozen Ground Area (ever frost and seasonal frozen ground) subgrade engineering, pipe engineering, in Artificial Frozen Soil (shaft excavation, foundation pit enclosure, Metro Connection Passage, the docking of shield structure and turnover hole) engineering, Temperature Field of Permafrost has certain heterogeneity (thermograde), continue to use non-homogeneous temperature frozen soil experiment method and theoretical system and go the distortion of Frozen Soil Cylinder (structure) in prediction, assessment Permafrost Area and Artificial Frozen Soil engineering with stable, there is important learning value and engineering significance.Relevant apparatus is urgently set up.
At present existing most frozen soil experiment device, mainly for the solid frozen soil sample of uniform temperature, lacks the correlation test device of hollow frozen soil sample at non-homogeneous temperature.Existing hollow torsion shear apparatus subjects is hollow sample, but cannot realize the control of non-homogeneous temperature.Existing patent application number is: 201310010431.1 open source literature " thermograde frozen soil uniaxial static creep test device and using method thereof " and application number are: 201310313643.7 open source literature " a kind of two-dimension temperature gradient frozen soil experiment device and using method thereof ", can realize respectively Vertical Temperature Gradient control and the control of two-dimension temperature gradient of solid frozen soil sample, but not all specially for hollow frozen soil sample, cannot realize the mechanical property of hollow frozen soil sample and accurately test.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of hollow frozen soil experiment device and using method thereof, can realize the independent of the inside and outside different temperatures of hollow frozen soil sample controls, can realize the quick and stable control of radial symmetry gradient, for the mechanical property of the hollow frozen soil of research thermograde provides further technique guarantee.
Technical scheme: for achieving the above object, technical scheme of the present invention is as follows:
A kind of hollow frozen soil experiment device, comprise base, pressure chamber, hollow frozen soil sample, interior glued membrane, outer glued membrane, internal recycle pipeline, outer circulation pipeline, temperature-control refrigeration equipment and confined pressure opertaing device, described pressure chamber is located at above base, and top, described pressure chamber is provided with piston hole, in described pressure chamber, on described base, be provided with groove bottom cushion block upward, on the cushion block of described bottom, be installed with hatband under the sample of hollow annular hat-shaped structure, and the bossing position of described bottom cushion block and the shade position of hatband under sample corresponding fixing, described interior glued membrane is hollow tubular structure, described interior glued membrane is vertically arranged under sample on hatband, and under the bottom surface surrounding of described interior glued membrane and sample, the shade inner ring edge of hatband is fixed, described hollow frozen soil sample is hollow tubular structure, the outside surface of the adjacent interior glued membrane of inside surface of described hollow frozen soil sample is placed on the shade of hatband under sample, described outer glued membrane is hollow tubular structure, the outside surface of the adjacent hollow frozen soil sample of inside surface of described outer glued membrane, and the bottom surface surrounding of described outer glued membrane is fixedly mounted on the edge, shade outer ring of hatband under sample, described interior glued membrane and be provided with hatband on sample above outer glued membrane, and on the top surrounding of described interior glued membrane and outer glued membrane and sample in the shade of hatband, edge, outer ring is fixing respectively, hatband on described sample, hollow frozen soil sample, under sample hatband in, overall diameter is identical, on described sample, on hatband, fixedly mount fluted top cushion block down, and the bossing position of described top cushion block is corresponding with the shade position of hatband on sample, the upper surface of described top cushion block is provided with piston, and described piston is arranged in piston hole, in the inner chamber of described hollow frozen soil sample, be provided with internal recycle pipeline, two connectivity ports of described internal recycle pipeline are connected with coolant circulation passage with base through bottom cushion block respectively again, described coolant circulation passage and temperature-control refrigeration equipment connection, described confined pressure opertaing device is communicated with the inner chamber of hollow frozen soil sample by interior pressure passageway, and described confined pressure opertaing device passes into refrigerant in inner chamber, in the peripheral cavity of described hollow frozen soil sample, be provided with outer circulation pipeline, two connectivity ports of described outer circulation pipeline are connected with coolant circulation passage through base respectively, described coolant circulation passage and temperature-control refrigeration equipment connection, described confined pressure opertaing device is communicated with by the peripheral cavity of outer pressure passageway and hollow frozen soil sample, and described confined pressure opertaing device passes into refrigerant in peripheral cavity.In the refrigerant that the inner chamber of described hollow frozen soil sample and peripheral cavity pass into, be provided with temperature sensor, the signal output part of described temperature sensor is connected with the signal input part of data collecting instrument.
Further, described internal recycle pipeline is inverted U-shaped; Described outer circulation pipeline is solenoid type inverted U-shaped, can increase the contact area of outer circulation pipeline and refrigerant.
Further, on the top surrounding of described interior glued membrane and outer glued membrane and sample, hatband is tightened with bungee, and under the bottom surrounding of described interior glued membrane and outer glued membrane and sample, hatband is tightened with bungee.Bungee elasticity is larger, easy operating, and it is better to tighten effect, can realize the complete seal isolation of inwall, outer wall and refrigerant of hollow frozen soil sample.
A using method for hollow frozen soil experiment device, comprises the following steps:
A, on base, fixedly mount bottom cushion block, and make its groove upwards, on the cushion block of bottom, fixedly mount hatband under sample, and the bossing position of described bottom cushion block and the shade position of hatband under sample corresponding; Glued membrane in the vertical installation of the shade inner ring edge of hatband under described sample, be close to interior glued membrane outside hollow frozen soil sample is vertically installed, outer glued membrane is vertically installed in the outside that is close to hollow frozen soil sample, place hatband on sample in hollow frozen soil sample upper surface, on described sample, above hatband, fixedly mount top cushion block, and the bossing position of described top cushion block is corresponding with the shade position of hatband on sample, be provided with piston at the upper surface of described top cushion block;
B, in the cavity of described hollow frozen soil sample, internal recycle pipeline is set, two connectivity ports of described internal recycle pipeline are connected with coolant circulation passage with base through bottom cushion block respectively again, described coolant circulation passage and temperature-control refrigeration equipment connection; In the peripheral cavity of described hollow frozen soil sample, be provided with outer circulation pipeline, two connectivity ports of described outer circulation pipeline are connected with coolant circulation passage through base respectively, described coolant circulation passage and temperature-control refrigeration equipment connection;
C, described confined pressure opertaing device are communicated with the inner chamber of hollow frozen soil sample by interior pressure passageway, and described confined pressure opertaing device is communicated with by the peripheral cavity of outer pressure passageway and hollow frozen soil sample; In the peripheral cavity of the inner chamber of described hollow frozen soil sample and described hollow frozen soil sample, be provided with temperature sensor;
D, on base setting pressure chamber, make mounted structure in above-mentioned steps be placed in inside, pressure chamber, described piston through piston hole reveal put outside top, pressure chamber;
E, described confined pressure opertaing device pass into respectively refrigerant in inner chamber and peripheral cavity;
F, open temperature-control refrigeration equipment, the refrigerant of temperature-control refrigeration equipment circulates in internal recycle pipeline and outer circulation pipeline by coolant circulation passage;
The data of g, monitoring temperature sensor, the simultaneously dynamic temperature of adjusting temperature-control refrigeration equipment;
H, the inner chamber for the treatment of hollow frozen soil sample and peripheral cavity temperature stabilization, form after the radial symmetry gradient of setting, and can carry out frozen soil experiment.
Beneficial effect:
1, apparatus of the present invention and using method thereof are mainly for hollow frozen soil sample, can realize the independent of inside and outside confined pressure controls, can realize the independent of inside and outside different temperatures controls, the boundary condition that the Different Diameter that can form hollow frozen soil sample distributes to confined pressure to temperature gradient distribution, Different Diameter, for the mechanical property of research thermograde frozen soil provides further technique guarantee.
2, apparatus of the present invention hollow core frozen soil sample freezes by liquid refrigerating medium, can accelerate the control time of radial symmetry gradient, and its refrigeration is better than transfer of air refrigeration, and liquid refrigerating medium can be directly as the loading carrier of inside and outside confined pressure.
3, in apparatus of the present invention, temperature sensor is directly placed in inside and outside refrigerant, can directly measure the temperature of inside and outside refrigerant, provides foundation for dynamically adjusting temperature-control refrigeration equipment.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present invention.
Accompanying drawing 2 is the front view of hatband on sample.
Accompanying drawing 3 is the vertical view of hatband on sample.
Accompanying drawing 4 is the front view of hatband under sample.
Accompanying drawing 5 is the vertical view of hatband under sample.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, a kind of hollow frozen soil experiment device, comprise base 6, pressure chamber 2, hollow frozen soil sample 11, interior glued membrane 14, outer glued membrane 15, internal recycle pipeline 17, outer circulation pipeline 18, temperature-control refrigeration equipment and confined pressure opertaing device, described pressure chamber 2 is located at above base 6, and 2 tops, described pressure chamber are provided with piston hole.
In described pressure chamber 2, on described base 6, be provided with groove bottom cushion block 13 upward, on described bottom cushion block 13, be installed with hatband 12 under the sample of hollow annular hat-shaped structure, and the bossing position of described bottom cushion block 13 is corresponding with the shade position of hatband under sample 12 fixing, it is fixing that under described bottom cushion block 13 and sample, hatband 12 adopts bolt 10, described interior glued membrane 14 is hollow tubular structure, described interior glued membrane 14 is vertically arranged under sample on hatband 12, and under the bottom surface surrounding of described interior glued membrane 14 and sample, the shade inner ring edge seal of hatband 12 is fixed, described hollow frozen soil sample 11 is hollow tubular structure, the outside surface of the adjacent interior glued membrane 14 of inside surface of described hollow frozen soil sample 11, and the bottom surface of hollow frozen soil sample 11 is arranged on the shade of hatband 12 under sample, described outer glued membrane 15 is hollow tubular structure, the outside surface of the adjacent hollow frozen soil sample 11 of inside surface of described outer glued membrane 15, and the bottom surface surrounding of described outer glued membrane 15 adopts sealing fixed form to be arranged on the edge, shade outer ring of hatband 12 under sample, the height of described interior glued membrane 14 and outer glued membrane 15 is a little more than the height of hollow frozen soil sample 11, described interior glued membrane 14 and outer glued membrane 15 are provided with hatband 9 on sample above, and on the top surrounding of described interior glued membrane 14 and outer glued membrane 15 and sample in the shade of hatband 9, edge, outer ring seals respectively fixing, hatband 9 on described sample, hollow frozen soil sample 11, under sample hatband 12 in, overall diameter is identical, and on sample, hatband 9 is similarly hollow annular hat-shaped structure, on described sample, on hatband 9, fixedly mount fluted top cushion block 8 down, and the bossing position of described top cushion block 8 is corresponding with the shade position of hatband on sample 9 fixing, it is fixing that on described top cushion block 8 and sample, hatband 9 adopts bolt 10, the upper surface of described top cushion block 8 is provided with piston 1, and described piston 1 is arranged in piston hole, in piston hole, move down hollow frozen soil sample 11 is loaded by piston 1, just can realize compression test, shear test and the creep test of radial symmetry gradient frozen soil sample.
In the inner chamber (being pressure chamber's 2 area of space of interior glued membrane 14 inner sides) of described hollow frozen soil sample 11, be provided with internal recycle pipeline 17, two connectivity ports of described internal recycle pipeline 17 are connected with coolant circulation passage 3 with base 6 through bottom cushion block 13 respectively again, described coolant circulation passage 3 and extraneous temperature-control refrigeration equipment connection, described confined pressure opertaing device is communicated with the inner chamber of hollow frozen soil sample 11 by interior pressure passageway 4, described confined pressure opertaing device passed into refrigerant 19 in inner chamber by interior pressure passageway 4 in the past, liquid coolant in extraneous temperature control cool equipment circulates in inner chamber internal recycle pipeline 17 by coolant circulation passage 3, liquid coolant is transmitted cold to inner chamber refrigerant 19, thereby realizing the independent of inner chamber controls, independently realize chamber pressure value by interior pressure pipeline 4 toward passing into a certain amount of refrigerant 19 in inner chamber simultaneously.In the peripheral cavity (being pressure chamber's 2 area of space in outer glued membrane 15 outsides) of described hollow frozen soil sample 11, be provided with outer circulation pipeline 18, two connectivity ports of described outer circulation pipeline 18 are connected with coolant circulation passage 3 through base 6 respectively again, described coolant circulation passage 3 and extraneous temperature-control refrigeration equipment connection, described confined pressure opertaing device is communicated with the peripheral cavity of hollow frozen soil sample 11 by outer pressure passageway 7, described confined pressure opertaing device can pass into refrigerant 19 by outer pressure passageway 7 in peripheral cavity, the liquid coolant of extraneous temperature control cool equipment by coolant circulation passage 3 outside in proper order in pipeline 18 in proper order, liquid coolant is transmitted cold and is realized independently controlling of peripheral cavity to peripheral refrigerant 19, independently realize peripheral cavity pressure value by external pressure pipeline 7 toward passing into a certain amount of refrigerant 19 in peripheral cavity simultaneously.Aforesaid liquid refrigerant 19 not only refrigeration is better than transfer of air formula refrigeration, and liquid refrigerating medium 19 can, directly as the loading carrier of inside and outside confined pressure, coordinate the test of hollow frozen soil sample 11.
In the refrigerant 19 that the inner chamber of described hollow frozen soil sample 11 and peripheral cavity pass into, be provided with temperature sensor 16, described two temperature sensors 16 are gone between and 5 are connected with data collecting instrument by temperature sensing respectively, and the signal output part of two the described temperature sensors 16 respectively signal input part of the data collecting instrument corresponding with it connects.So just, can detect inside and outside chamber different temperatures, control thereby realize the independent of inside and outside chamber different temperatures.
Described internal recycle pipeline 17 is inverted U-shaped, and described outer circulation pipeline 18 is solenoid type inverted U-shaped.Hollow frozen soil sample 11 is this device experiment object, and because hollow frozen soil sample 11 intracavity spaces are limited, and solenoid type inverted U-shaped circulating line volume is larger, therefore use inverted U-shaped internal recycle pipeline structure; Because the peripheral void space of hollow frozen soil sample 11 is larger, in order to increase refrigeration contact area, can use solenoid type inverted U-shaped pipeline in proper order.
On the top surrounding of described interior glued membrane 14 and outer glued membrane 15 and sample, hatband 9 use bungees are tightened, under the bottom surrounding of described interior glued membrane 14 and outer glued membrane 15 and sample, hatband 12 use bungees are tightened, and can realize the complete seal isolation of inwall, outer wall and refrigerant of hollow frozen soil sample.
The installation of hollow frozen soil experiment device and a using method thereof, comprise the following steps:
A, on base 6, fixedly mount bottom cushion block 13, and make its groove upwards, on bottom cushion block 13, fixedly mount hatband 12 under sample, and the bossing position of described bottom cushion block 13 and the shade position of hatband under sample 12 corresponding; Glued membrane 14 in the vertical installation of the shade inner ring edge of hatband 12 under described sample, be close to interior glued membrane 14 outsides hollow frozen soil sample 11 is vertically installed, outer glued membrane 15 is vertically installed in the outside that is close to hollow frozen soil sample 11, in hollow frozen soil sample 11 upper surfaces, hatband 9 on sample is set, on described sample, above hatband 9, fixedly mount top cushion block 8, and the bossing position of described top cushion block 8 is corresponding with the shade position of hatband on sample 9, be provided with piston 1 at the upper surface of described top cushion block 8;
B, internal recycle pipeline 17 is set in the cavity of described hollow frozen soil sample 11, two connectivity ports of described internal recycle pipeline 17 are connected with coolant circulation passage 3 with base 6 through bottom cushion block 13 respectively again, described coolant circulation passage 3 and temperature-control refrigeration equipment connection; In the peripheral cavity of described hollow frozen soil sample 11, be provided with outer circulation pipeline 18, two connectivity ports of described outer circulation pipeline 18 are connected with coolant circulation passage 3 through base 6 respectively, described coolant circulation passage 3 and temperature-control refrigeration equipment connection;
C, described confined pressure opertaing device are communicated with the inner chamber of hollow frozen soil sample 11 by interior pressure passageway 4, and described confined pressure opertaing device is communicated with the peripheral cavity of hollow frozen soil sample 11 by outer pressure passageway 7; In the peripheral cavity of the inner chamber of described hollow frozen soil sample 11 and described hollow frozen soil sample 11, be provided with temperature sensor 16;
D, on base 6 setting pressure chamber 2, make mounted structure in above-mentioned steps be placed in 2 inside, pressure chamber, described piston 1 reveals and puts outside 2 tops, pressure chamber through piston hole;
E, described confined pressure opertaing device pass into respectively refrigerant 19 in inner chamber and peripheral cavity;
F, open temperature-control refrigeration equipment, the refrigerant (liquid coolant) of temperature-control refrigeration equipment circulates in internal recycle pipeline 17 and outer circulation pipeline 18 by coolant circulation passage 3;
The data of g, monitoring temperature sensor 16, the dynamic temperature of adjusting temperature-control refrigeration equipment simultaneously, debugging is to the test temperature of hollow frozen soil sample;
H, the inner chamber for the treatment of hollow frozen soil sample 11 and peripheral cavity temperature stabilization, form after the radial symmetry gradient of setting, in piston hole, move down hollow frozen soil sample 11 is loaded by piston 1, just can realize compression test, shear test and the creep test of radial symmetry gradient frozen soil sample, provide foundation for further studying thermograde to the impact of frozen soil strength and distortion.
What apparatus of the present invention base 6 adopted is stainless steel.The upper and lower hatband of sample and upper and lower part cushion block adopt the adiabatic Materials with High Strength such as epoxy resin, nylon, influencing each other of inside and outside different refrigerants be can completely cut off to greatest extent, hollow frozen soil sample 11 upper/lower terminal radial symmetry gradients and the inconsistent phenomenon of its overall radial thermograde eliminated.
The present invention is the structural design of the hollow frozen soil sample of special pin, in hollow frozen soil experiment precision, than using current known solid frozen soil experiment device further.
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 (4)
1. a hollow frozen soil experiment device, it is characterized in that: comprise base (6), pressure chamber (2), hollow frozen soil sample (11), interior glued membrane (14), outer glued membrane (15), internal recycle pipeline (17), outer circulation pipeline (18), temperature-control refrigeration equipment and confined pressure opertaing device, described pressure chamber (2) is located at base (6) above, and top, described pressure chamber (2) is provided with piston hole;
In described pressure chamber (2), on described base (6), be provided with groove bottom cushion block (13) upward, on described bottom cushion block (13), be installed with hatband (12) under the sample of hollow annular hat-shaped structure, and the bossing position of described bottom cushion block (13) is corresponding fixing with the shade position of hatband under sample (12), described interior glued membrane (14) is hollow tubular structure, described interior glued membrane (14) is vertically arranged on hatband under sample (12), and under the bottom surface surrounding of described interior glued membrane (14) and sample, the shade inner ring edge of hatband (12) is fixed, described hollow frozen soil sample (11) is hollow tubular structure, the outside surface of the adjacent interior glued membrane of inside surface (14) of described hollow frozen soil sample (11) is placed on the shade of hatband under sample (12), described outer glued membrane (15) is hollow tubular structure, the outside surface of the adjacent hollow frozen soil sample of inside surface (11) of described outer glued membrane (15), and the bottom surface surrounding of described outer glued membrane (15) is fixedly mounted on the edge, shade outer ring of hatband under sample (12), described interior glued membrane (14) and outer glued membrane (15) are provided with hatband on sample (9) above, and on the top surrounding of described interior glued membrane (14) and outer glued membrane (15) and sample in the shade of hatband (9), edge, outer ring is fixing respectively, hatband on described sample (9), hollow frozen soil sample (11), in hatband under sample (12), overall diameter is identical, the fluted top cushion block (8) down of the upper fixed installation of hatband on described sample (9), and the bossing position of described top cushion block (8) is corresponding with the shade position of hatband on sample (9), the upper surface of described top cushion block (8) is provided with piston (1), and described piston (1) is arranged in piston hole,
In the inner chamber of described hollow frozen soil sample (11), be provided with internal recycle pipeline (17), two connectivity ports of described internal recycle pipeline (17) are connected with coolant circulation passage (3) with base (6) through bottom cushion block (13) respectively again, described coolant circulation passage (3) and temperature-control refrigeration equipment connection, described confined pressure opertaing device is communicated with the inner chamber of hollow frozen soil sample (11) by interior pressure passageway (4), and described confined pressure opertaing device passes into refrigerant (19) in inner chamber; In the peripheral cavity of described hollow frozen soil sample (11), be provided with outer circulation pipeline (18), two connectivity ports of described outer circulation pipeline (18) are connected with coolant circulation passage (3) through base (6) respectively, described coolant circulation passage (3) and temperature-control refrigeration equipment connection, described confined pressure opertaing device is communicated with the peripheral cavity of hollow frozen soil sample (11) by outer pressure passageway (7), and described confined pressure opertaing device passes into refrigerant (19) in peripheral cavity;
In the refrigerant (19) that the inner chamber of described hollow frozen soil sample (11) and peripheral cavity pass into, be provided with temperature sensor (16), the signal output part of described temperature sensor (16) is connected with the signal input part of data collecting instrument.
2. the hollow frozen soil experiment device of one according to claim 1, is characterized in that: described internal recycle pipeline (17) is inverted U-shaped, and described outer circulation pipeline (18) is solenoid type inverted U-shaped.
3. the hollow frozen soil experiment device of one according to claim 1, it is characterized in that: on the top surrounding of described interior glued membrane (14) and outer glued membrane (15) and sample, hatband (9) is tightened with bungee, under the bottom surrounding of described interior glued membrane (14) and outer glued membrane (15) and sample, hatband (12) is tightened with bungee.
4. the using method based on a kind of hollow frozen soil experiment device claimed in claim 1, is characterized in that, comprises the following steps:
A, at base (6) upper fixed installation bottom cushion block (13), and make its groove upwards, hatband (12) under the upper fixed installation of bottom cushion block (13) sample, and the bossing position of described bottom cushion block (13) is corresponding with the shade position of hatband under sample (12), glued membrane (14) in vertical installation of shade inner ring edge of hatband under described sample (12), be close to interior glued membrane (14) outside hollow frozen soil sample (11) is vertically installed, outer glued membrane (15) is vertically installed in the outside that is close to hollow frozen soil sample (11), place hatband (9) on sample in hollow frozen soil sample (11) upper surface, above hatband on described sample (9), fixedly mount top cushion block (8), and the bossing position of described top cushion block (8) is corresponding with the shade position of hatband on sample (9), be provided with piston (1) at the upper surface of described top cushion block (8),
B, internal recycle pipeline (17) is set in the cavity of described hollow frozen soil sample (11), two connectivity ports of described internal recycle pipeline (17) are connected with coolant circulation passage (3) with base (6) through bottom cushion block (13) respectively again, described coolant circulation passage (3) and temperature-control refrigeration equipment connection; In the peripheral cavity of described hollow frozen soil sample (11), be provided with outer circulation pipeline (18), two connectivity ports of described outer circulation pipeline (18) are connected with coolant circulation passage (3) through base (6) respectively, described coolant circulation passage (3) and temperature-control refrigeration equipment connection;
C, described confined pressure opertaing device are communicated with the inner chamber of hollow frozen soil sample (11) by interior pressure passageway (4), and described confined pressure opertaing device is communicated with the peripheral cavity of hollow frozen soil sample (11) by outer pressure passageway (7); In the peripheral cavity of the inner chamber of described hollow frozen soil sample (11) and described hollow frozen soil sample (11), be provided with temperature sensor (16);
D, in the upper setting pressure chamber (2) of base (6), make mounted structure in above-mentioned steps be placed in inside, pressure chamber (2), described piston (1) reveals and puts outside top, pressure chamber (2) through piston hole;
E, described confined pressure opertaing device pass into respectively refrigerant (19) in inner chamber and peripheral cavity;
F, open temperature-control refrigeration equipment, the refrigerant of temperature-control refrigeration equipment circulates in internal recycle pipeline (17) and outer circulation pipeline (18) by coolant circulation passage (3);
The data of g, monitoring temperature sensor (16), the simultaneously dynamic temperature of adjusting temperature-control refrigeration equipment;
H, the inner chamber for the treatment of hollow frozen soil sample (11) and peripheral cavity temperature stabilization, form after the radial symmetry gradient of setting, and can carry out frozen soil experiment.
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| CN201410112371.9A CN103884581B (en) | 2014-03-24 | 2014-03-24 | Hollow frozen soil testing device and using method thereof |
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| CN201410112371.9A CN103884581B (en) | 2014-03-24 | 2014-03-24 | Hollow frozen soil testing device and using method thereof |
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| CN104297055A (en) * | 2014-10-23 | 2015-01-21 | 石家庄铁道大学 | Device for pre-cooling liquid in low-temperature triaxial confining pressure chamber, and treatment method of device |
| CN105183029A (en) * | 2015-09-25 | 2015-12-23 | 中国科学院寒区旱区环境与工程研究所 | Frozen soil hollow cylinder apparatus pressure chamber temperature control device |
| CN105181404A (en) * | 2015-07-09 | 2015-12-23 | 中国科学院寒区旱区环境与工程研究所 | Frozen clay hollow cylinder sample preparation device |
| CN105223085A (en) * | 2015-11-06 | 2016-01-06 | 中国矿业大学 | Gradient frozen soil experiment method under permanent rigidity and dead load compound action |
| 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 |
| CN109900548A (en) * | 2019-03-22 | 2019-06-18 | 崔凯 | A kind of low temperature frozen soil triaxial apparatus |
| 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 |
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| CN105223085A (en) * | 2015-11-06 | 2016-01-06 | 中国矿业大学 | Gradient frozen soil experiment method under permanent rigidity and dead load compound action |
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| CN109900548A (en) * | 2019-03-22 | 2019-06-18 | 崔凯 | A kind of low temperature frozen soil triaxial apparatus |
| CN109900548B (en) * | 2019-03-22 | 2020-12-11 | 崔凯 | Low-temperature frozen soil triaxial apparatus |
| 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 |
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| 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 |
| CN113092278A (en) * | 2021-04-02 | 2021-07-09 | 浙江中正岩土技术有限公司 | High-temperature gradient disposal weak soil gas splitting test device and using method thereof |
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