CN104990947B - A kind of bilateral frost heave test device and test method for porous material - Google Patents
A kind of bilateral frost heave test device and test method for porous material Download PDFInfo
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- CN104990947B CN104990947B CN201510434795.1A CN201510434795A CN104990947B CN 104990947 B CN104990947 B CN 104990947B CN 201510434795 A CN201510434795 A CN 201510434795A CN 104990947 B CN104990947 B CN 104990947B
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Abstract
A kind of bilateral frost heave test device and test method for porous material, the present invention relates to a kind of porous material experimental rig, the present invention is in order to solve freezing using can not solve porous material also in the prior art, temperature field in melting process, moisture field and the change of deformation field, the problem of evaluating porous material resistance frost heave ability test device, it includes forcing press, constant-temp. and-moisture maintenance, reaction frame top plate, reaction frame stent, first water test tube, second water test tube, cylinder, base, frost heave test specimen suit component, pressure head, rack for test tube, LVDT displacement sensors, pressure sensor and data collector and two cryostat circulators；LVDT displacement sensors are installed on cylinder barrel at piston rod, reaction frame top plate is fixedly mounted on the top of frame stent, base is fixedly mounted on the bottom of reaction frame stent, and frost heave test specimen suit component is fixedly mounted on base, and the present invention is used in the experiment of porous material frost heave.
Description
Technical field
The present invention relates to a kind of porous material experimental rig, and in particular to a kind of bilateral frost heave test for porous material
Device and test method.
Background technology
The seasonal frost action of cold district can trigger the engineering problems such as a series of frost heave, thaw collapse, freeze-thaw damage, be
Observed in laboratory porous material freeze, in melting process temperature field, moisture field and deformation field change, evaluation is porous
Material resistance frost heave, thaw collapse and the ability of Frozen-thawed cycled comprehensive function, but can not solve problems also in the prior art
Device." based on the above, the patent publication date of Publication No. CN102590468A is a kind of deep of on 07 18th, 2012
Native frozen-thaw process pilot system, disclose temperature control box, high temperature resistant lucite cylinder, seaming chuck, temperature sensor, lower bottom base, thoroughly
Water stone, aqueduct, graduated cylinder, draining air hole and weighing sensor, high temperature resistant lucite cylinder is placed on lower bottom base, on lower bottom base
Connected with aqueduct and pressure regulation tube, aqueduct is connected with graduated cylinder, and graduated cylinder is equipped with draining air hole, and graduated cylinder is placed in biography of weighing
On sensor, without the first water test tube 6, the second water test tube 7 and multiple adiabatic rings 17 is disclosed in the document, do not disclose multiple
Adiabatic ring, convenient after specimen molding, smooth, intact can be installed in adiabatic ring, ensure that the shaping matter of test test specimen
Amount, it is ensured that the stabilization of experimental condition, while improve testing efficiency；And without each adiabatic ring disclosed in multiple adiabatic rings
Contacting has the generation of vertically movable deformation between ring above and below smooth permission, can effectively reduce between test specimen side wall and insulating ring
Frictional force, ensure that the reliability of experiment.
The content of the invention
The present invention is freezing, is being monitored in real time in melting process for the porous material for solving also solve in the prior art
The change in temperature field, moisture field and deformation field, evaluation porous material resistance frost heave ability test device, and after specimen molding not
Can it is convenient, smooth, intact the problem of being installed in adiabatic ring the problem of, and then provide a kind of for the bilateral of porous material
Frost heave and thaw collapse experimental rig.
It is of the invention to be for the technical solution used that solves the above problems：
A kind of bilateral frost heave test device for porous material, it includes forcing press, constant-temp. and-moisture maintenance, reaction frame
Top plate, reaction frame stent, the first water test tube, the second water test tube, cylinder, base, frost heave test specimen suit component, pressure head, examination
Pipe support, LVDT displacement sensors, pressure sensor, data collector and two cryostat circulators；LVDT displacement sensors are installed
In cylinder barrel at piston rod, reaction frame top plate is fixedly mounted on the top of frame stent, and base is fixedly mounted on reaction frame
The bottom of stent, frost heave test specimen suit component are fixedly mounted on base, and cylinder is vertically arranged in the lower section of reaction frame top plate, and
The rear end cap of cylinder barrel is mounted by means of bolts on the lower face of reaction frame top plate, and the external part of cylinder piston rod is fixed
One pressure head is installed, the bottom of pressure head is machined with arc convex, and arc convex withstands on the top of frost heave test specimen suit component, the
One water test tube is connected with the top of frost heave test specimen suit component, and the bottom of the second water test tube and frost heave test specimen suit component connects
Logical, rack for test tube is installed in constant-temp. and-moisture maintenance, and the first water test tube and the second water test tube are installed on rack for test tube, pressure
Machine and two cryostat circulators are set close to constant-temp. and-moisture maintenance, and two connecting tubes on a cryostat circulator pass through perseverance
The side wall of constant temperature and humidity curing box is connected with the top of frost heave test specimen suit component, and two connecting tubes of another cryostat circulator are worn
The side wall for crossing constant-temp. and-moisture maintenance is connected with the bottom of frost heave test specimen suit component, and forcing press passes through two high-pressure gas pipelines
Connected with cylinder, pressure sensor is installed on high-pressure gas pipeline, and LVDT displacement sensors and pressure sensor are and data
Collector connects.
A kind of bilateral frost heave for porous material and thaw collapse test method, what when the method was realized in the steps below：
Step 1：Experiment porous material after shaping is satisfied and is placed in+2 DEG C, the perseverance of 98% humidity together with mould after water process
Health 6h in constant temperature and humidity case；
Step 2：Multiple temperature sensors are buried along the gravity direction of experiment porous material, and are embedded in experiment
The distance between the side of porous material, two neighboring temperature sensor is 25mm, and the depth of burying of each temperature sensor is
15mm, and cover soil loading latex film in the lateral wall of experiment porous material；
Step 3：A filter paper is pasted into the upper surface for testing porous material and lower face respectively, then will be tested porous
Material is placed between two permeable stones, and is fixed the top of leather sheath and the sealing of the first resilient seal circle by geotechnological latex film
On the first temperature control disk, the bottom of leather sheath and the sealing of the second resilient seal circle are fixed on by the second temperature control disk by geotechnological latex film
On, the first temperature control disk, the second temperature control disk, leather sheath and two permeable stones are installed in the circular sleeve of multiple adiabatic rings composition；
Step 4：Make in the arc convex of cylinder seaming chuck and the arc pit of rectangle protrusion on the first temperature control disk and locate
In critical contact state；
Step 5：LVDT displacement sensors, pressure sensor and temperature sensor are carried out respectively by data collector
Data acquisition；
Step 6：Coolant is packed into two cryostat circulators and the first temperature control disk and the second temperature control disk respectively, is cooled down
Start two cryostat circulators after the completion of liquid filling, temperature control is carried out to the first temperature control disk and the second temperature control disk respectively, make the
The temperature control of one temperature control disk makes the second temperature control disk temperature control at -2 ° to -35 ° at -2 ° to -35 °, treat the first temperature control disk and
Start to test after second temperature control disk temperature stabilization；
Step 7：Porous material frost-heaving deformation to be tested reaches stable state, you can stops experiment；
Step 8：The experiment porous material freezed is taken out, according to the interval Stratified Sampling of 15mm, tests each layer position soil
The mass water content of sample, and data are recorded, complete experiment.
The beneficial effects of the invention are as follows：1st, cryostat circulator 2 controls the first temperature control disk 13 and the second temperature control disk in the present invention
14 control temperature, and lateral adiabatic orientation heat transfer mode is realized by adiabatic ring 17, it can set as desired not
With freeze, thawing mode.
2nd, the present invention uses outer circulation type temperature control system, by the outer circulation of coolant to the first temperature control disk 13 and the
Two temperature control disks 14 carry out temperature control, and the temperature load of stabilization, temperature control are provided by the first temperature control disk 13 and the second temperature control disk 14
The operating accuracy of disk is ± 0.05 DEG C.
3rd, LVDT displacement sensors 18 be installed on 8 piston rod of cylinder external part, determination test porous material 21 it is vertical
Deform, precision 0.01mm, the data of 1 pressure of forcing press are measured by pressure sensor 19.
4 vertically become the temperature and test specimen of measuring experiment 21 diverse location of porous material by data collector 20
The data of 1 pressure of displacement and forcing press of shape carry out data storage and analysis.
5 can be controlled test temperature in the range of -35 ° to 50 ° by the present invention, so the device of the invention can be real
The experiment of frost heave and thaw collapse and Frozen-thawed cycled characteristic is carried out in the range between existing -35 ° to 50 ° of temperature to experiment material.
Brief description of the drawings
Fig. 1 is overall structure front view of the present invention, and Fig. 2 is the front view of frost heave test specimen suit component 10, and Fig. 3 is pressure head 11
Front view, Fig. 4 is the front view of the first temperature control disk 13, and Fig. 5 is the sectional view of A-A in Fig. 4, and Fig. 6 is the second temperature control disk 14
Front view, Fig. 7 are the sectional views of B-B in Fig. 6, and Fig. 8 is the front view of adiabatic ring 17, and Fig. 9 is the top view of Fig. 8.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1-Fig. 9, a kind of bilateral frost heave for porous material is tried
Experiment device and test method, it is deposited including forcing press 1, constant-temp. and-moisture maintenance 3, reaction frame top plate 4, reaction frame stent 5, first
Water test tube 6, the second water test tube 7, cylinder 8, base 9, frost heave test specimen suit component 10, pressure head 11, rack for test tube 12, LVDT displacements
Sensor 18, pressure sensor 19, data collector 20 and two cryostat circulators 2；LVDT displacement sensors 18 are installed on gas
For 8 cylinder of cylinder at piston rod, reaction frame top plate 4 is fixedly mounted on the top of frame stent 5, and base 9 is fixedly mounted on reaction frame
The bottom of stent 5, frost heave test specimen suit component 10 are fixedly mounted on base 9, and cylinder 8 is vertically arranged in reaction frame top plate 4
Lower section, and the rear end cap of 8 cylinder of cylinder is mounted by means of bolts on the lower face of reaction frame top plate 4,8 piston rod of cylinder
External part is installed with a pressure head 11, and the bottom of pressure head 11 is machined with arc convex, and arc convex withstands on frost heave specimen sleeve
The top of arrangement 10, the first water test tube 6 are connected with the top of frost heave test specimen suit component 10, and the second water test tube 7 is with freezing
The bottom connection of swollen test specimen suit component 10, rack for test tube 12 are installed in constant-temp. and-moisture maintenance 3, the first water test tube 6 and the
Two water test tubes 7 are installed on rack for test tube 12, and forcing press 1 and two cryostat circulators 2 are set close to constant-temp. and-moisture maintenance 3,
And two connecting tubes on a cryostat circulator 2 pass through the side wall and frost heave test specimen suit component 10 of constant-temp. and-moisture maintenance 3
Top connection, the side wall and frost heave specimen sleeve of two connecting tubes of another cryostat circulator 2 through constant-temp. and-moisture maintenance 3
The bottom connection of arrangement 10, forcing press 1 are connected by two high-pressure gas pipelines with cylinder 8, and pressure sensor 19 is installed on
On high-pressure gas pipeline, LVDT displacement sensors 18 and pressure sensor 19 are connected with data collector 20.
Embodiment two：Illustrate present embodiment with reference to Fig. 1-Fig. 9, a kind of bilateral frost heave for porous material is tried
Experiment device and test method, the frost heave test specimen suit component 10 include the first temperature control disk 13, the second temperature control disk 14, leather sheath 15,
Two permeable stones 16, multiple temperature sensors and multiple adiabatic rings 17；Leather sheath 15 is tubular leather sheath, multiple adiabatic rings 17 by up to
Under be vertically arranged composition circular sleeve, the second 14, two, temperature control disk, 16 and first temperature control disk 13 of permeable stone is set successively from bottom to top
Put in circular sleeve, porous material to be tested is arranged between two permeable stones 16, is provided with porous material to be tested more
A temperature sensor, the top of leather sheath 15 are sleeved on the first temperature control disk 13, and the bottom of leather sheath 15 is sleeved on the second temperature control disk 14,
First temperature control disk, 13 top is machined with rectangle protrusion 13-2, and the top of rectangle protrusion 13-2 is machined with arc pit, pressure head
11 bottom is arranged in arc pit, and multiple temperature sensors are connected by line with data collector 20, other and specific reality
It is identical to apply mode one.
Embodiment three：Illustrate present embodiment with reference to Fig. 1, Fig. 2, Fig. 4 and Fig. 5, it is a kind of for porous material
Bilateral frost heave test device and test method, the first temperature control disk 13 is circular slab, and circular slab is radially inside machined with
First snakelike seal groove 13-1, the top of circular slab are machined with the first water-bath circulation fluid entrance, the first water-bath loop exit and
One moisturizing pore, the first water-bath circulation fluid entrance and the first water-bath loop exit are connected with the first snakelike seal groove 13-1, the
The outlet pipe of one water test tube 6 is arranged in through the first moisturizing pore at the permeable stone 16 of top, and the first water-bath circulates
Liquid entrance and the first water-bath loop exit are connected by a connecting tube with a cryostat circulator 2 respectively, other and specific reality
It is identical to apply mode two.
Embodiment four：Illustrate present embodiment with reference to Fig. 1, Fig. 2, Fig. 6 and Fig. 7, it is a kind of for porous material
Bilateral frost heave test device and test method, the second temperature control disk 14 is circular slab, and circular slab is radially inside machined with
Second snakelike seal groove 14-1, the bottom of circular slab are machined with the second water-bath circulation fluid entrance, the second water-bath loop exit and
Two moisturizing pores, the second water-bath circulation fluid entrance and the second water-bath loop exit are connected with the second snakelike seal groove 14-1, the
The outlet pipe of two water test tubes 6 is arranged in through the second moisturizing pore at the permeable stone 16 of lower section, and the second water-bath circulates
Liquid entrance and the second water-bath loop exit are connected by a connecting tube with a cryostat circulator 2 respectively, other and specific reality
It is identical to apply mode three.
Embodiment five：Illustrate present embodiment with reference to Fig. 1, Fig. 2, Fig. 4 and Fig. 5, it is a kind of for porous material
Bilateral frost heave test device and test method, the first temperature control disk 13 are along the circumferential direction machined with two annular grooves, leather sheath
15 top is sleeved on the first temperature control disk 13, and the outer cover of each annular groove is equipped with a first resilient seal circle, its
It is identical with embodiment two.
Embodiment six：Illustrate present embodiment with reference to Fig. 1, Fig. 2, Fig. 6 and Fig. 7, it is a kind of for porous material
Bilateral frost heave test device and test method, the second temperature control disk 14 are along the circumferential direction machined with two annular grooves, leather sheath
15 bottom is sleeved on the second temperature control disk 14, and the outer cover of each annular groove is equipped with a second resilient seal circle, its
It is identical with embodiment four.
Embodiment seven：Illustrate present embodiment with reference to Fig. 1, Fig. 2, Fig. 8 and Fig. 9, it is a kind of for porous material
Bilateral frost heave test device and test method, each adiabatic ring 17 include two semicircle annulus and two connectors, and two
A semicircle annulus is opposite to fasten one annulus of composition, and two intersections of two semicircle annulus are consolidated by two connectors
Fixed, one end of each annulus is machined with annular protrusion, and it is recessed that the other end of each annulus is machined with annular corresponding with annular protrusion
Groove, adiabatic ring 17 are adiabatic ring 17 made of acryhic material, other identical with embodiment two.
Embodiment eight：Illustrate present embodiment with reference to Fig. 1-Fig. 9, one kind of present embodiment is used for porous material
Bilateral frost heave and thaw collapse experimental rig and test method, using described in embodiment one, two, three, four, five, six or seven
What device was realized, specific implementation step is as follows：
Step 1：Experiment porous material 21 after shaping is satisfied and is placed in+2 DEG C, 98% humidity together with mould after water process
Health 6h in climatic chamber；
Step 2：Multiple temperature sensors are buried along the gravity direction of experiment porous material 21, and are embedded in examination
It is 25mm to test the distance between the side of porous material 21, two neighboring temperature sensor, the embedded depth of each temperature sensor
Spend for 15mm, and soil loading latex film is covered in the lateral wall of experiment porous material 21；
Step 3：A filter paper is pasted into the upper surface for testing porous material 21 and lower face respectively, then will be tested more
Porous materials 21 are placed between two permeable stones 16, and by geotechnological latex film by the top of leather sheath 15 and the first resilient seal circle
Sealing is fixed on the first temperature control disk 13, is fixed the bottom of leather sheath 15 and the sealing of the second resilient seal circle by geotechnological latex film
On the second temperature control disk 14, the first temperature control disk 13, the second temperature control disk 14, leather sheath 15 and two permeable stones 16 are installed on multiple exhausted
In the circular sleeve that hot ring 17 forms；
Step 4：Make the arc pit of rectangle protrusion on the arc convex and the first temperature control disk 13 of 8 seaming chuck 11 of cylinder
It is interior and be in critical contact state；
Step 5：By data collector 20 respectively to LVDT displacement sensors 18, pressure sensor 19 and temperature sensing
Device carries out data acquisition；
Step 6：Coolant is packed into two 2 and first temperature control disks 13 of cryostat circulator and the second temperature control disk 14 respectively,
Start two cryostat circulators 2 after the completion of coolant filling, respectively to the first temperature control disk 13 and the second temperature control disk 14 into trip temperature
Control, makes the temperature control of the first temperature control disk 13 14 temperature control of the second temperature control disk is treated at -2 ° to -35 ° at -2 ° to -35 °
Start to test after 14 temperature stabilization of first temperature control disk 13 and the second temperature control disk；
Step 7：21 frost-heaving deformation of porous material to be tested reaches stable state, you can stops experiment；
Step 8：The experiment porous material 21 freezed is taken out, according to the interval Stratified Sampling of 15mm, tests each layer position
The mass water content of soil sample, and data are recorded, complete experiment.
Claims (6)
1. a kind of bilateral frost heave test device for porous material, including forcing press (1), constant-temp. and-moisture maintenance (3), counter-force
Frame top plate (4), reaction frame stent (5), cylinder (8), base (9), pressure head (11), rack for test tube (12), LVDT displacement sensors
(18), pressure sensor (19), data collector (20) and two cryostat circulators (2)；It is characterized in that：First is further included to deposit
Water test tube (6), the second water test tube (7) and frost heave test specimen suit component (10)；Frost heave test specimen suit component (10) includes first
Temperature control disk (13), the second temperature control disk (14), leather sheath (15), two permeable stones (16), multiple temperature sensors and multiple adiabatic rings
(17)；LVDT displacement sensors (18) are installed on cylinder (8) cylinder at piston rod, and reaction frame top plate (4) is fixedly mounted on
The top of reaction frame stent (5), base (9) are fixedly mounted on the bottom of reaction frame stent (5), frost heave test specimen suit component (10)
It is fixedly mounted on base (9), cylinder (8) is vertically arranged in the lower section of reaction frame top plate (4), and the rear end of cylinder (8) cylinder
Lid is mounted by means of bolts on the lower face of reaction frame top plate (4), and the external part of cylinder (8) piston rod is installed with one
A pressure head (11), the bottom of pressure head (11) are machined with arc convex, and arc convex withstands on the upper of frost heave test specimen suit component (10)
Side, the first water test tube (6) are connected with the top of frost heave test specimen suit component (10), the second water test tube (7) and frost heave test specimen
Suit component (10) bottom connection, rack for test tube (12) be installed on constant-temp. and-moisture maintenance (3) in, the first water test tube (6) and
Second water test tube (7) is installed on rack for test tube (12), and forcing press (1) and two cryostat circulators (2) are supported close to constant temperature and humidity
Protecting box (3) is set, and two connecting tubes on a cryostat circulator (2) pass through the side wall and jelly of constant-temp. and-moisture maintenance (3)
The top connection of swollen test specimen suit component (10), two connecting tubes of another cryostat circulator (2) are conserved through constant temperature and humidity
The side wall of case (3) is connected with the bottom of frost heave test specimen suit component (10), and forcing press (1) passes through two high-pressure gas pipelines and gas
Cylinder (8) connects, and pressure sensor (19) is installed on high-pressure gas pipeline, LVDT displacement sensors (18) and pressure sensor
(19) it is connected with data collector (20), leather sheath (15) is tubular leather sheath, and multiple adiabatic rings (17) are from top to bottom vertically arranged
Circular sleeve is formed, each adiabatic ring (17) includes two semicircle annulus and two connectors, and two semicircle annulus are opposite
One annulus of composition is fastened, two intersections of two semicircle annulus are fixed by two connectors, one end of each annulus
Be machined with annular protrusion, the other end of each annulus is machined with annular groove corresponding with annular protrusion, adiabatic ring (17) be by
Adiabatic ring made of acryhic material (17), the second temperature control disk (14), two permeable stones (16) and the first temperature control disk (13) are under
It is successively set on upwards in circular sleeve, porous material (21) to be tested is arranged between two permeable stones (16), to be tested more
Multiple temperature sensors are installed, the top of leather sheath (15) is sleeved on the first temperature control disk (13), leather sheath on Porous materials (21)
(15) bottom is sleeved on the second temperature control disk (14), and first temperature control disk (13) top is machined with rectangle protrusion (13-2), rectangular
The top of shape protrusion (13-2) is machined with arc pit, and the bottom of pressure head (11) is arranged in arc pit, multiple temperature sensing
Device is connected by line with data collector (20).
A kind of 2. bilateral frost heave test device for porous material according to claim 1, it is characterised in that：Described first
Temperature control disk (13) is circular slab, and circular slab is radially inside machined with the first snakelike seal groove (13-1), the top of circular slab
Be machined with the first water-bath circulation fluid entrance, the first water-bath loop exit and the first moisturizing pore, the first water-bath circulation fluid entrance and
First water-bath loop exit is connected with the first snakelike seal groove (13-1), and the outlet pipe of the first water test tube (6) passes through first
Moisturizing pore is arranged in permeable stone (16) place of top, and the first water-bath circulation fluid entrance and the first water-bath loop exit point
Do not connected by a connecting tube with a cryostat circulator (2).
A kind of 3. bilateral frost heave test device for porous material according to claim 2, it is characterised in that：Described second
Temperature control disk (14) is circular slab, and circular slab is radially inside machined with the second snakelike seal groove (14-1), the bottom of circular slab
Be machined with the second water-bath circulation fluid entrance, the second water-bath loop exit and the second moisturizing pore, the second water-bath circulation fluid entrance and
Second water-bath loop exit is connected with the second snakelike seal groove (14-1), and the outlet pipe of the second water test tube (6) passes through second
Moisturizing pore is arranged in permeable stone (16) place of lower section, and the second water-bath circulation fluid entrance and the second water-bath loop exit point
Do not connected by a connecting tube with a cryostat circulator (2).
A kind of 4. bilateral frost heave test device for porous material according to claim 1, it is characterised in that：Described first
Temperature control disk (13) is along the circumferential direction machined with two annular grooves, and the top of leather sheath (15) is sleeved on the first temperature control disk (13),
And the outer cover of each annular groove is equipped with a first resilient seal circle.
A kind of 5. bilateral frost heave test device for porous material according to claim 3, it is characterised in that：Described second
Temperature control disk (14) is along the circumferential direction machined with two annular grooves, and the bottom of leather sheath (15) is sleeved on the second temperature control disk (14),
And the outer cover of each annular groove is equipped with a second resilient seal circle.
6. a kind of carry out bilateral jelly using the bilateral frost heave test device for being used for porous material claim 1,2,3,4 or 5 Suo Shu
The method of swollen experiment, it is characterised in that：What the method was achieved by the following steps：
Step 1：Experiment porous material (21) after shaping is satisfied and is placed in 2 DEG C, the constant temperature of 98% humidity together with mould after water process
Health 6h in constant humidity cabinet；
Step 2：Multiple temperature sensors are buried along the gravity direction of experiment porous material (21), and are embedded in experiment
The distance between the side of porous material (21), two neighboring temperature sensor are 25mm, the embedded depth of each temperature sensor
Spend for 15mm, and soil loading latex film is covered in the lateral wall of experiment porous material (21)；
Step 3：A filter paper is pasted into the upper surface for testing porous material (21) and lower face respectively, then will be tested porous
Material (21) is placed between two permeable stones (16), and by geotechnological latex film that the top of leather sheath (15) and the first elastic force is close
Seal sealing is fixed on the first temperature control disk (13), by geotechnological latex film by the bottom of leather sheath (15) and the second resilient seal circle
Sealing is fixed on the second temperature control disk (14), and the first temperature control disk (13), the second temperature control disk (14), leather sheath (15) and two are permeable
Stone (16) is installed in the circular sleeve of multiple adiabatic rings (17) composition；
Step 4：Make arc convex and the arc of rectangle protrusion on the first temperature control disk (13) of cylinder (8) seaming chuck (11) recessed
Hole is interior and is in critical contact state；
Step 5：LVDT displacement sensors (18), pressure sensor (19) and temperature are passed respectively by data collector (20)
Sensor carries out data acquisition；
Step 6：Cooling is packed into two cryostat circulators (2) and the first temperature control disk (13) and the second temperature control disk (14) respectively
Liquid, starts two cryostat circulators (2), respectively to the first temperature control disk (13) and the second temperature control disk (14) after the completion of coolant filling
Temperature control is carried out, makes the temperature control of the first temperature control disk (13) at -2 ° to -35 °, makes second temperature control disk (14) temperature control
At -2 ° to -35 °, start to test after the first temperature control disk (13) and second temperature control disk (14) temperature stabilization；
Step 7：Porous material (21) frost-heaving deformation to be tested reaches stable state, that is, stops experiment；
Step 8：The experiment porous material (21) freezed is taken out, according to the interval Stratified Sampling of 15mm, tests each layer position soil
The mass water content of sample, and data are recorded, complete experiment.
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| CN115753873A (en) * | 2022-11-14 | 2023-03-07 | 长安大学 | Frozen soil body water migration and frost heaving rule testing device and testing method |
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| CN101299011B (en) * | 2007-04-30 | 2010-09-22 | 浙江建设职业技术学院 | Air pressure creep deformation tester |
| CN104296488B (en) * | 2009-01-13 | 2018-07-03 | Emd密理博公司 | Improved biomaterial freezing |
| CN101806686B (en) * | 2010-03-26 | 2012-06-20 | 中国科学院地质与地球物理研究所 | Testing method used for measuring repeated expansion , shrinkage and deformation of soil sample |
| CN201773046U (en) * | 2010-09-10 | 2011-03-23 | 长沙理工大学 | Weathered mechanical property tester for rock and soil mass |
| CN102004053B (en) * | 2010-09-20 | 2012-06-27 | 中国科学院寒区旱区环境与工程研究所 | Temperature-controllable portable multifunctional pressure chamber |
| CN102288490A (en) * | 2011-05-12 | 2011-12-21 | 通标标准技术服务(上海)有限公司 | Static bearing testing device for elevated floor |
| CN102590468B (en) * | 2011-11-29 | 2014-10-01 | 中国科学院寒区旱区环境与工程研究所 | Testing system for deep soil freezing/thawing process |
| CN103512699A (en) * | 2012-06-21 | 2014-01-15 | 中国科学院寒区旱区环境与工程研究所 | Device for measuring pore water pressure in frozen soil |
| CN203287337U (en) * | 2013-06-04 | 2013-11-13 | 中国科学院寒区旱区环境与工程研究所 | Soil body freezing-thawing process visualized testing device |
| CN103487564B (en) * | 2013-07-23 | 2015-07-15 | 北京交通大学 | Double-chamber determinator for volume frost-heaving ratio of frozen soil |
| CN103728185A (en) * | 2013-12-31 | 2014-04-16 | 北京交通大学 | Low-temperature dynamic triaxial apparatus |
| CN103776984B (en) * | 2014-02-24 | 2015-07-22 | 黑龙江省水利科学研究院 | Joint test device and method for expansion and frost heaving of soil body |
| CN103969282A (en) * | 2014-05-04 | 2014-08-06 | 同济大学 | Test device for making research on soil freezing and thawing temperature field, water migration and deformation law |
| CN104316671B (en) * | 2014-10-10 | 2016-05-18 | 同济大学 | A kind of experimental rig that measures artificial freeze thawing soil frost-heave force and frost heaving amount |
| CN104634666A (en) * | 2015-02-09 | 2015-05-20 | 哈尔滨工业大学 | Single-linked low-temperature low-confining-pressure triaxial creep testing apparatus |
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