CN104297030B - A kind of sample preparation device and method for making sample for simulating frozen soil self-assembling formation process - Google Patents
A kind of sample preparation device and method for making sample for simulating frozen soil self-assembling formation process Download PDFInfo
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- CN104297030B CN104297030B CN201410544992.4A CN201410544992A CN104297030B CN 104297030 B CN104297030 B CN 104297030B CN 201410544992 A CN201410544992 A CN 201410544992A CN 104297030 B CN104297030 B CN 104297030B
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Abstract
The invention discloses a kind of sample preparation device for simulating frozen soil self-assembling formation process, including temperature control system, sample-preparing system, debulking systems and computer control system；The temperature control system includes incubator, cryostat device and circularly cooling pipeline；The circularly cooling pipeline includes the conveying coolant duct of insertion, spiral refrigeration piping successively and reclaims coolant duct；The sample-preparing system includes sample preparation chamber and sampling die；The spiral refrigeration piping is looped around on sample preparation chamber outer peripheral face in the shape of a spiral；The debulking systems include loading frame and pressure head；The loading compaction velocity and process depth of the pressure head are by computer control system control.Present invention also offers method for making sample, it is particularly suitable for use in that different freezing rates and the different frozen soil samples freezed with compacting sequencing are made in normal temperature laboratory using the sample preparation device, the experiment for research freezing rate and compacting with freezing influence of the order to the mechanical strength characteristics of soil provides true and reliable sample.
Description
Technical field
The present invention is to be related to a kind of sample preparation device and method for making sample for being applied to simulation frozen soil self-assembling formation process, specifically
Say it is to be related to prepare the freezing rate of sample by control and select to freeze to operate with being compacted both sample preparations as needed
Sequencing, so as to simulate the sample preparation device and different method for making sample of frozen soil forming process under a variety of natural operating modes.
Background technology
With the lasting progress of strategy to develop western regions, the frozen ground regions even infrastructure of Permafrost Area
Construction is constantly carried out, in order to ensure the security and economy of this area's engineering, it is necessary to under a variety of natural operating modes
Frozen soil mechanics strength characteristics furtherd investigate.Triaxial compression test and unconfined compression strength test are in frozen soil mechanics property
Research in have extremely wide application.When carrying out both experiments, it is the first step to make cylindrical sample, and sample is made
Quality directly decide the correctness of result of the test, different method for making sample will also obtain different result of the tests.
In conventional cyopedology and Artificial Frozen Soil mechanical property test MT specifications, the triaxial compressions and nothing of frozen soil
The preparation method of confined compressive strength sample is typically：The normal temperature sample under the conditions of certain moisture content is first made, then together with system
Original mold tool be put into together it is quick-frozen 4-6 hours less than in -30 DEG C of insulating box, finally by sample in required test temperature bottom knockout,
And repaired with native knife is repaiied, it is fitted into polybag and seals, is conserved under test temperature stand-by.In this sample making course, necessarily contain
The soil of water rate, which first passes around compacting, turns into the cylindrical soil sample under normal temperature state, and then sample is reduced to -30 DEG C, soil sample from normal temperature
In moisture complete freeze, formed experiment required for frozen sample.
However, the Seasonal Freeze-thaw Soils of Frozen Ground Area are actually temperature passes through the several months slowly varying mistake to subzero temperature by positive temperature
Journey and its inverse process, and to be then temperature changed rapidly by positive temperature by the short period for the freeze thawing that freeze thawing and weather cataclysm are caused
To the process and its inverse process of subzero temperature, therefore the influence stable to frozen soil engineering of research freezing rate has certain theory significance
And construction value.
In addition, the frozen soil generation type of different regions also has difference, some regional frozen soil are by natural by normal temperature soil
Settlement Consolidation meets what microthermal climate freezed again, and this is similar with the method for making sample for being first compacted freeze again of defined in specification；
But some regional frozen soil are that manual compaction is formed again after freezing by fluffy natural soil, or are passed through by frozen soil
Formed by being filled again after excavation, this frozen soil is relatively common in extremely frigid zones reclamation work；In addition, in some Practical Projects
In, native fills process just along with the reduction of temperature.Moreover, the sequencing for freezing and being compacted of soil will influence the shape of ice
Into also the cementing form and degree of consolidation of influence ice particle and soil particle, certainly will finally influence the mechanical property of frozen soil.Therefore,
Consider that sample freezes to have very big realistic meaning with the sequencing of compacting during sample is prepared.
At present, refering to the pertinent literature in terms of frozen soil, about freezing rate and freeze and be compacted sequencing to frozen soil
There is not been reported for the influence of mechanical property, is referred to about the sample preparation device and the also non-someone of method for making sample for considering both factors.
Therefore, research and develop one kind and can contemplate both factors, so as to simulate the sample preparation device of frozen soil forming process under different natural operating modes
And method for making sample, it is significant to carrying out frozen soil mechanics property research in a deep going way.
The content of the invention
It is a primary object of the present invention to overcome prior art preparation facilities to exist for preparing on sample institute Consideration
Deviation and fail to prepare more meet under different natural operating modes in terms of the sample of frozen soil forming process not enough there is provided a kind of mould
Intend the sample preparation device and method for making sample of frozen soil self-assembling formation process, be particularly suitable for use in being made not in normal temperature laboratory using the device
With freezing rate and the different frozen soil samples freezed with compacting sequencing, so that under research sample is formed with natural conditions
Frozen soil more meets.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of sample preparation device for simulating frozen soil self-assembling formation process, including temperature control system, sample-preparing system, debulking systems and meter
Calculation machine control system.
Wherein, the temperature control system includes incubator, cryostat device and circularly cooling pipeline, and the incubator passes through circulation
Refrigeration piping is connected with cryostat device；The circularly cooling pipeline includes the conveying coolant duct of insertion, spiral system successively
Cold pipeline and recovery coolant duct；The conveying coolant duct and recovery coolant duct are distributed in incubator and cryostat
Between device；The spiral refrigeration piping is located inside incubator；Flow control is provided with the conveying coolant duct
Device.
Meanwhile, the sample-preparing system includes sample preparation chamber and sampling die, and the sample preparation chamber erect type is arranged in incubator
Portion, the upper end open of sample preparation chamber is located at incubator upper surface；The sampling die can matched be installed into sample preparation chamber cavity volume；Institute
Detachable be provided with bloom, the bloom in bottom surface for stating sample preparation chamber is provided with connecting line and computer control system electricity
The temperature sensor of connection；The spiral refrigeration piping is looped around on sample preparation chamber outer peripheral face in the shape of a spiral.
Also, the debulking systems include loading frame and pressure head；The loading frame is detachable to be arranged on incubator upper end
On face；The pressure head is connected by depression bar with loading frame is distributed in the surface of sample preparation chamber upper end open, and can be pressed into guarantor vertically
In sampling die inside incubator in set sample preparation chamber cavity volume；The loading compaction velocity and process depth of the pressure head are by calculating
Machine control system is controlled.
The sample preparation device of the present invention is further arranged to：The debulking systems also include heat-insulating shield and limiter；It is described exhausted
Hot plate is located at pressure head bottom and identical with pressure head bottom size；The loading frame includes vertical door frame, connect with incubator upper surface
Tactile sole piece；The sole piece is respectively distributed to two end edges of incubator upper surface；The loading frame can be set by its sole piece bottom
Some rollers and along incubator upper surface make move back and forth；The limiter is located on incubator upper surface, for loading
Frame move back and forth track carry out it is spacing.
The sample preparation device of the present invention is further set to：The sample preparation chamber bloom bottom is provided with jack, described thousand
Jin is very useful to be ejected in by the sampling die completed after sample preparation together with made sample；The bloom bottom and jack top
Between be provided with and bloom bottom size identical thermal insulation board；The bloom and thermal insulation board are arranged on jack top after being integrally formed
Portion.
The sample preparation device of the present invention is further set to：The sample preparation chamber is cylinder, and the sampling die is cylinder
Shape three-part pattern；The internal diameter of the cylindrical sample preparation chamber is identical with the external diameter of three-part pattern；The height of the sample preparation chamber and three-part pattern is equal
2 times of the specimen height of system for needed for.
The sample preparation device of the present invention is further set to：The thermal insulating material of polyurethane foam is filled with inside the incubator
Material.
Present invention also offers a kind of method for making sample for simulating frozen soil self-assembling formation process, comprise the following steps：
（1）, assemble the sample preparation device for preparing the simulation frozen soil self-assembling formation process needed for sample；
（2）, by the loading frame and pressure head in sample preparation device above incubator from the surface of sample preparation chamber upper end open
Remove, the upper end open of sample preparation chamber is in unobstructed state；
（3）, in the cavity volume bottom layer overlay filter paper of sample preparation chamber cylinder, it is then the inner surface of sampling die three-part pattern is equal
It is installed into after even painting last layer silicone oil in sample preparation chamber cavity volume；
（4）, the fluffy soil sample mixed will be mixed in advance pour into sampling die three-part pattern；
（5）, be moved back to loading frame and pressure head, make pressure head be distributed in sample preparation chamber upper end open surface and in loading compacting
The original state of operation；Then the loading compaction velocity and process depth for controlling pressure head by computer control system make pressure head lid
Firmly three-part pattern upper port, now pressure head be in quasi- pressure condition, while the heat-insulating shield of pressure head bottom can be incubated to sample preparation chamber；
（6）, prepare the frozen soil sample of different self-assembling formation processes as needed and take different sampling and sample preparation
Prepared by order, the sampling includes temperature, freezing rate needed for sample, and the sample preparation order includes freezing and being compacted
The sequencing of both sample preparations operation；
（7）, after simulation frozen soil self-assembling formation process sample prepare after, by pressure head from compaction state pull out and together with
Loading frame is removed directly over sample preparation chamber upper end open；
（8）, will prepare and there is the sampling die three-part pattern of sample to be taken out together with made sample from the cavity volume of sample preparation chamber,
Made sample is taken out from sampling die three-part pattern, placed into stand-by after insulating box progress constant temperature maintenance.
Further, the step（6）Sample preparation order to be first compacted freeze again, or first freeze to be compacted again, Huo Zhebian
Freeze side compacting.
Further, the step（6）In freeze sample preparation operation include, by conveying the flow control on coolant duct
Device processed is conveyed into the coolant rate size of spiral refrigeration piping to adjust from cryostat device, and then to sampling die three-part pattern
In soil sample cooled；Soil sample temperature is understood by the temperature sensor being connected with computer control system, when what is measured
Temperature stabilization thinks that cooling terminates in temperature needed for sample, that is, completes to freeze, while can calculate being averaged for sample freezes speed
Rate.
Further, the step（6）In compacting sample preparation operation include, pressure head is controlled by computer control system
Loading compaction velocity and process depth so that in sampling die three-part pattern original fluffy soil sample pressure head pressure effect under
The pre-set specimen height of computer control system is compacted at leisure, so as to complete compacting.
Further：The step（8）The sample preparation for having sample can will be prepared by being arranged on the jack of sample preparation chamber bottom
Mould three-part pattern is ejected together with made sample from sample preparation chamber cavity volume；After made sample is separated from three-part pattern again
It is put into insulating box and carries out constant temperature maintenance 48 hours.
Compared with prior art, a kind of sample preparation device and method for making sample for simulating frozen soil self-assembling formation process of the present invention has
Beneficial effect have：
1st, the circularly cooling pipeline being connected with cryostat device includes the conveying coolant duct of insertion, spiral refrigeration successively
Pipeline and recovery coolant duct, the spiral refrigeration piping are looped around on sample preparation chamber outer peripheral face in the shape of a spiral, it is ensured that
Soil sample is in specimen is prepared in the sampling die three-part pattern in sample preparation chamber cavity volume, and each position of the upper, middle and lower of soil sample is equal
It can be able to uniform decrease in temperature, fast cooling, thus cooling efficiency high, to consume the energy few.
2nd, by setting flow controller on conveying coolant duct, to realize that regulation cryostat device is conveyed into spirally
The purpose of coolant rate size in refrigeration piping, so that the controllable of different rate of temperature fall can be used to different sample preparation soil samples by reaching
Demand；By setting the temperature sensor electrically connected with computer control system in the bloom of sample preparation chamber bottom surface, come timely
The soil sample temperature in preparation process is solved, when the temperature stabilization measured is in temperature needed for sample, that is, thinks that cooling terminates；And
The average freezing rate of sample can be calculated according to temperature fall time, is conducive to realizing freeze operation quantification control.
3rd, debulking systems and temperature control system be it is separate, can be by taking different sampling and sample preparation order to enter
Row prepares different frozen soil samples；It can specifically use and first be compacted freeze again or first freeze to be compacted again or be compacted when freezing
Different sample preparation orders, to simulate the forming process of frozen soil under different natural operating modes, so that needed for preparing and meeting different researchs
True and reliable sample.
4th, the automated control operation for preparing sample is realized by computer control system, reach data reaction it is accurate,
Quickly, perform operation in order, reliable, many purposes such as sample making course is smooth, controllable, and ensure sample and be successfully prepared, meet mark
It is accurate.
5th, the present invention also has the advantages that simple for structure, easy to install, solid and reliable, low manufacture cost, utilization rate are high, one
Individual sample preparation device can simulate under a variety of different natural operating modes frozen soil forming process to complete the preparation of various sample, can significantly drop
Low laboratory prepares the cost payout of sample.
The above is only the general introduction of technical solution of the present invention, in order to be better understood upon the technological means of the present invention, under
With reference to accompanying drawing, the invention will be further described in face.
Brief description of the drawings
Fig. 1 is a kind of structural representation for the sample preparation device for simulating frozen soil self-assembling formation process of the present invention；
Fig. 2 is a kind of cross-section structure signal of the incubator for the sample preparation device for simulating frozen soil self-assembling formation process of the present invention
Figure；
Fig. 3 is a kind of structural representation of the sampling die for the sample preparation device for simulating frozen soil self-assembling formation process of the present invention.
Embodiment
With reference to Figure of description, the present invention is further illustrated.
As shown in Figure 1, Figure 2 and Figure 3, a kind of sample preparation device for simulating frozen soil self-assembling formation process, including temperature control system, system
Sample system, debulking systems and computer control system.
Wherein, the temperature control system includes incubator 1, cryostat device 2 and circularly cooling pipeline, and the incubator 1 passes through
Circularly cooling pipeline is connected with cryostat device 2, and the inside of incubator 1 is filled with the insulation material of polyurethane foam；It is described to follow
Ring refrigeration piping includes the conveying coolant duct 21 of insertion, spiral refrigeration piping 22 successively and reclaims coolant duct 23；
The conveying coolant duct 21 and recovery coolant duct 23 are distributed between incubator 1 and cryostat device 2；The spiral
Formula refrigeration piping 22 is located inside incubator 1；Flow controller 24 is provided with the conveying coolant duct 21.
The sample-preparing system includes sample preparation chamber 3 and sampling die 4, and the sample preparation chamber 3 is cylinder, the sampling die 4
For cylindrical three-part pattern；The internal diameter of the cylindrical sample preparation chamber 3 is identical with the external diameter of three-part pattern；The sample preparation chamber 3 and three-part pattern
Height be needed for 2 times of specimen height of system.The erect type of sample preparation chamber 3 is arranged on inside incubator 1, sample preparation chamber 3
Upper end open is located at the upper surface of incubator 1；The sampling die 4 can matched be installed into the cavity volume of sample preparation chamber 3；The sample preparation chamber
3 bottom surface is detachable to be provided with and is provided with connecting line 50 in bloom 31, the bloom 31 and connects with computer control system 5
The temperature sensor 32 connect；The spiral refrigeration piping 22 is looped around on the outer peripheral face of sample preparation chamber 3 in the shape of a spiral；The sample preparation chamber
The bottom of bloom 31 is provided with jack 34, and the jack 34 is used to complete the sampling die 4 after sample preparation together with made sample
Eject together；It is provided with and the bottom size identical thermal insulation board of bloom 31 between the bottom of bloom 31 and the top of jack 34
33；The bloom 31 and thermal insulation board 33 are arranged on the top of jack 34 after being integrally formed.
The debulking systems include loading frame 6 and pressure head 7；The loading frame 6 is detachable to be arranged on the upper surface of incubator 1
On；The pressure head 7 is connected by depression bar 70 with loading frame 6 is distributed in the surface of the upper end open of sample preparation chamber 3, and can be pressed into vertically
In sampling die 4 in the set cavity volume of sample preparation chamber 3 in the inside of incubator 1；The loading compaction velocity and process depth of the pressure head 7 are equal
Controlled by computer control system 5.The debulking systems also include heat-insulating shield 71 and limiter 72；The heat-insulating shield 71 is located at pressure
First 7 bottom is simultaneously identical with the bottom size of pressure head 7；The loading frame 6 includes vertical door frame 61, contacted with the upper surface of incubator 1
Sole piece 62；The sole piece 62 is respectively distributed to two end edges of the upper surface of incubator 1；The loading frame 6 can pass through its bottom of sole piece 62
Roller 63 that portion is provided with and make to move back and forth along the upper surface of incubator 1；The limiter 72 is located on the upper surface of incubator 1,
Quantity be four, for loading frame 6 move back and forth track carry out it is spacing.
Sample preparation device according to Fig. 1, Fig. 2 and Fig. 3 can prepare the frozen soil sample of different self-assembling formation processes, specifically
The step of method for making sample is：Loading frame 6 is first slid onto into the upper surface side of incubator 1 by the roller 63 of the bottom of sole piece 62, made
The upper end open for obtaining sample preparation chamber 3 is in unobstructed state, and limiter 72 now can prevent loading frame 6 from sliding excessively to turn over；
Again in the cavity volume bottom layer overlay filter paper of the cylinder of sample preparation chamber 3, the inner surface of sampling die three-part pattern is uniformly coated with one layer
It is installed into after silicone oil in the cavity volume of sample preparation chamber 3；Then the fluffy soil sample mixed will be mixed in advance to pour into sampling die three-part pattern
In；Then loading frame 6 and pressure head 7 are moved back to, pressure head 7 is distributed in the surface of the upper end open of sample preparation chamber 3 and in loading compacting
The original state of operation；The loading compaction velocity and process depth of pressure head 7 are controlled by computer control system 5 afterwards, makes pressure head 7
The upper port of sampling die 4 is covered, now pressure head 7 is in quasi- pressure condition, while the heat-insulating shield 71 of the bottom of pressure head 7 can be to sample preparation chamber
3 are incubated.
Take different sampling and sample preparation suitable further according to needing to prepare the frozen soil sample of different self-assembling formation processes
Prepared by sequence, the sampling includes temperature, freezing rate needed for sample, and the sample preparation order includes freezing with being compacted this
The sequencing of two kinds of sample preparation operations；Then wait after the sample of simulation frozen soil self-assembling formation process prepares, by pressure head 7 from pressure
Real state is pulled out and removed together with loading frame 6 directly over the upper end open of sample preparation chamber 3；Finally can be by being arranged on sample preparation chamber 3
The jack 34 of bottom will prepare the sampling die 4 for having sample and be ejected together with made sample from the cavity volume of sample preparation chamber 3；By institute
Sample processed departs from three-part pattern, places into stand-by after insulating box carries out constant temperature maintenance 48 hours.
The sample preparation order that preparing the frozen soil sample of different self-assembling formation processes as needed can take, which has, to be first compacted freeze again,
Either first freeze to be compacted again or the order such as be compacted when freezing.
It is embodied in using the sample preparation order for being first compacted freeze again：Computer control system 5 is first passed through to control pressure head 7
Loading compaction velocity and process depth so that in sampling die three-part pattern original fluffy soil sample pressure head pressure effect under
The pre-set specimen height of computer control system 5 is compacted at leisure, so as to complete compacting.Then conveying is passed through
Flow controller 24 on coolant duct 21 is conveyed into the coolant stream of spiral refrigeration piping 22 to adjust from cryostat device 2
Size is measured, and then is cooled to the soil sample in sampling die three-part pattern 4；Meanwhile, pass through what is be connected with computer control system 5
Temperature sensor 32 understands soil sample temperature, when the temperature stabilization measured is in temperature needed for sample, that is, thinks that cooling terminates, from
And complete to freeze.The sampling die 4 for having sample will be finally prepared to take out from the cavity volume of sample preparation chamber 3 together with made sample,
Made sample is departed from into three-part pattern, placed into stand-by after insulating box progress constant temperature maintenance.
It is embodied in using the sample preparation order for first freezing to be compacted again：First pass through the flow control on conveying coolant duct 21
Device 24 processed is conveyed into the coolant rate size of spiral refrigeration piping 22 to adjust from cryostat device 2, and then to sampling die
Soil sample in three-part pattern 4 is cooled；Meanwhile, soil sample is understood by the temperature sensor 32 being connected with computer control system 5
Temperature, when the temperature stabilization measured is in temperature needed for sample, that is, thinks that cooling terminates, so as to complete to freeze.Then pass through
Computer control system 5 controls the loading compaction velocity and process depth of pressure head 7 so that original fluffy in sampling die three-part pattern
It is high that the soil sample of pine is compacted to the pre-set sample of computer control system 5 at leisure under the pressure effect of pressure head
Degree, so as to complete compacting.To finally prepare has the sampling die 4 of sample together with made sample from the cavity volume of sample preparation chamber 3
Take out, made sample is departed from after three-part pattern, place into stand-by after insulating box progress constant temperature maintenance.
It is embodied in using the sample preparation order being compacted when freezing：Controlled by conveying the flow on coolant duct 21
Device 24 is conveyed into the coolant rate size of spiral refrigeration piping 22 to adjust from cryostat device 2, and then to sampling die three
Soil sample in die sinking 4 is cooled；At the same time, controlled by computer control system 5 pressure head 7 loading compaction velocity and
Process depth so that original fluffy soil sample is compacted to meter at leisure under the pressure effect of pressure head in sampling die three-part pattern
The pre-set specimen height of calculation machine control system 5.Period, pass through the TEMP being connected with computer control system 5
Device 32 understands soil sample temperature, when the temperature stabilization measured is in temperature needed for sample, that is, thinks that cooling terminates, while completing to freeze
Knot and compacting.The sampling die 4 for having sample will be finally prepared to take out from the cavity volume of sample preparation chamber 3 together with made sample, will
Made sample departs from after three-part pattern, places into stand-by after insulating box progress constant temperature maintenance.
The innovative point of the present invention is, debulking systems and temperature control system be it is separate, can be by taking different systems
Batten part carries out preparing different frozen soil samples with sample preparation order, is research freezing rate and compacting and freezes order to soil
The experiment of the influence of mechanical strength characteristics provides true and reliable sample；Moreover, spiral refrigeration piping and flow controller
Setting can more ensure that soil sample is in specimen is prepared in sampling die three-part pattern, and each position of the upper, middle and lower of soil sample can be able to
Uniform decrease in temperature, fast cooling, controllability cooling, so as to realize temperature with high efficiency, low energy consumption sample preparation, are greatly reduced laboratory and prepare examination
The cost payout of sample.
General principle, principal character and the advantage of the present invention has been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (9)
1. a kind of sample preparation device for simulating frozen soil self-assembling formation process, it is characterised in that：Including temperature control system, sample-preparing system, pressure
Real system and computer control system；
The temperature control system includes incubator, cryostat device and circularly cooling pipeline, and the incubator passes through circularly cooling pipeline
It is connected with cryostat device；The circularly cooling pipeline include successively the conveying coolant duct of insertion, spiral refrigeration piping and
Reclaim coolant duct；The conveying coolant duct and reclaim coolant duct be distributed in incubator and cryostat device it
Between；The spiral refrigeration piping is located inside incubator；Flow controller is provided with the conveying coolant duct；
The sample-preparing system includes sample preparation chamber and sampling die, and the sample preparation chamber erect type is arranged on inside incubator, sample preparation chamber
Upper end open be located at incubator upper surface；The sampling die can matched be installed into sample preparation chamber cavity volume；The sample preparation chamber
Detachable be provided with bloom, the bloom in bottom surface be provided with the temperature that connecting line is connected with computer control system
Sensor；The spiral refrigeration piping is looped around on sample preparation chamber outer peripheral face in the shape of a spiral；
The debulking systems include loading frame and pressure head；The loading frame is detachable to be arranged on incubator upper surface；It is described
Pressure head is connected by depression bar with loading frame is distributed in the surface of sample preparation chamber upper end open, and can be pressed into institute inside incubator vertically
If in the sampling die in sample preparation chamber cavity volume；The loading compaction velocity and process depth of the pressure head are by computer control system
Control；
The debulking systems also include heat-insulating shield and limiter；The heat-insulating shield be located at pressure head bottom and with pressure head bottom size phase
Together；The sole piece that the loading frame includes vertical door frame, contacted with incubator upper surface；The sole piece is respectively distributed on incubator
Two end edges of end face；Roller that the loading frame can be provided with by its sole piece bottom and make to move back along incubator upper surface
It is dynamic；The limiter is located on incubator upper surface, for loading frame move back and forth track carry out it is spacing.
2. a kind of sample preparation device for simulating frozen soil self-assembling formation process according to claim 1, it is characterised in that：The system
Specimen chamber bloom bottom is provided with jack, and the jack is used to complete the sampling die after sample preparation together with made sample
Ejection；It is provided with and bloom bottom size identical thermal insulation board between at the top of the bloom bottom and jack；The bloom and
Thermal insulation board is arranged on after being integrally formed at the top of jack.
3. a kind of sample preparation device for simulating frozen soil self-assembling formation process according to claim 1, it is characterised in that：The system
Specimen chamber is cylinder, and the sampling die is cylindrical three-part pattern；The internal diameter of the cylindrical sample preparation chamber and the external diameter of three-part pattern
It is identical；2 times of the specimen height that the height of the sample preparation chamber and three-part pattern is made needed for being.
4. a kind of sample preparation device for simulating frozen soil self-assembling formation process according to claim 1, it is characterised in that：It is described to protect
The insulation material of polyurethane foam is filled with inside incubator.
5. a kind of method for making sample for simulating frozen soil self-assembling formation process, it is characterised in that comprise the following steps：
（1）, assemble the sample preparation device for preparing the simulation frozen soil self-assembling formation process needed for sample；
（2）, the loading frame and pressure head in sample preparation device above incubator removed directly over sample preparation chamber upper end open,
The upper end open of sample preparation chamber is set to be in unobstructed state；
（3）, in the cavity volume bottom layer overlay filter paper of sample preparation chamber cylinder, then the inner surface of sampling die three-part pattern uniformly applied
It is installed into after last layer silicone oil in sample preparation chamber cavity volume；
（4）, the fluffy soil sample mixed will be mixed in advance pour into sampling die three-part pattern；
（5）, be moved back to loading frame and pressure head, make pressure head be distributed in sample preparation chamber upper end open surface and in loading compacting operation
Original state；Then the loading compaction velocity and process depth for controlling pressure head by computer control system make pressure head cover three
Upper port is molded, now pressure head is in quasi- pressure condition, while the heat-insulating shield of pressure head bottom can be incubated to sample preparation chamber；
（6）, prepare the frozen soil sample of different self-assembling formation processes as needed and take different sampling and sample preparation order
Prepared, the sampling includes temperature, freezing rate needed for sample, sample preparation order include freezing be compacted this two
Plant the sequencing of sample preparation operation；
（7）, after simulation frozen soil self-assembling formation process sample prepare after, by pressure head from compaction state pull out and together with loading
Frame is removed directly over sample preparation chamber upper end open；
（8）, will prepare and there is the sampling die three-part pattern of sample to be taken out together with made sample from the cavity volume of sample preparation chamber, by institute
Sample processed takes out from sampling die three-part pattern, places into stand-by after insulating box progress constant temperature maintenance.
6. a kind of method for making sample for simulating frozen soil self-assembling formation process according to claim 5, it is characterised in that：The step
Suddenly（6）Sample preparation order to be first compacted freeze again, either first freeze to be compacted again or be compacted when freezing.
7. a kind of method for making sample for simulating frozen soil self-assembling formation process according to claim 5, it is characterised in that：The step
Suddenly（6）In freeze sample preparation operation include, it is defeated from cryostat device to adjust by conveying the flow controller on coolant duct
The coolant rate size of spiral refrigeration piping is sent into, and then is cooled to the soil sample in sampling die three-part pattern；Pass through
The temperature sensor that is connected with computer control system understands soil sample temperature, when the temperature stabilization measured needed for sample temperature
When, that is, think that cooling terminates, complete to freeze, while the average freezing rate of sample can be calculated.
8. a kind of method for making sample for simulating frozen soil self-assembling formation process according to claim 5, it is characterised in that：The step
Suddenly（6）In compacting sample preparation operation include, control the loading compaction velocity and process of pressure head deep by computer control system
Degree so that original fluffy soil sample is compacted to computer control at leisure under the pressure effect of pressure head in sampling die three-part pattern
The pre-set specimen height of system processed, so as to complete compacting.
9. a kind of method for making sample for simulating frozen soil self-assembling formation process according to claim 5, it is characterised in that：The step
Suddenly（8）The sampling die three-part pattern for having sample can will be prepared together with made sample one by being arranged on the jack of sample preparation chamber bottom
Rise and ejected from sample preparation chamber cavity volume；Insulating box is placed into after made sample is separated from three-part pattern and carries out constant temperature maintenance 48
Hour.
Priority Applications (1)
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| CN104614217A (en) * | 2015-02-11 | 2015-05-13 | 绍兴文理学院 | Sample preparation method of soft soil three-axis sample with high water content |
| CN105181562A (en) * | 2015-06-09 | 2015-12-23 | 南京交通职业技术学院 | Visualization material test ambient temperature box |
| CN106442035B (en) * | 2016-05-18 | 2023-08-01 | 中国能源建设集团甘肃省电力设计院有限公司 | Device and method for manufacturing direct shear test sample of concrete-frozen soil contact surface |
| CN106644653A (en) * | 2017-02-07 | 2017-05-10 | 中国科学院寒区旱区环境与工程研究所 | Device and method for preparing and measuring frozen soil sample |
| CN107328861A (en) * | 2017-08-11 | 2017-11-07 | 江苏省宏源电力建设监理有限公司 | A kind of multi-functional physical parameter change modeling device in shield launching termination |
| CN109827827B (en) * | 2019-04-03 | 2021-05-18 | 安徽理工大学 | Device and method for manufacturing frozen soil sample of layered cold-growing structure |
| CN109991279A (en) * | 2019-05-17 | 2019-07-09 | 宁夏大学 | A kind of Frozen-thawed cycled exposure test device and test method |
| CN112067387B (en) * | 2020-09-04 | 2021-10-26 | 中国矿业大学 | Batch sample preparation device for frozen soil and use method thereof |
| CN113237725A (en) * | 2021-07-13 | 2021-08-10 | 中国科学院、水利部成都山地灾害与环境研究所 | Low-temperature standardized sample preparation device and sample preparation method for ice-soil mixture |
| CN114112625B (en) * | 2021-11-19 | 2024-02-13 | 安徽理工大学 | Frozen soil blasting model sample preparation device with high ice content |
| GB2616926A (en) * | 2021-11-19 | 2023-09-27 | Univ Anhui Sci & Technology | Sample preparation device for high-ice-content frozen soil blasting model |
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