CN110133219A - Soil body freeze thawing is eroded simulating on coupling loading device under a kind of centrifugal field - Google Patents
Soil body freeze thawing is eroded simulating on coupling loading device under a kind of centrifugal field Download PDFInfo
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Abstract
The present invention relates to soil body freeze thawing wind erosion simulating on coupling loading devices under a kind of centrifugal field, including model casing, heat-exchange device and wind control device, the heat-exchange device and wind control device are arranged at the upper end of the model casing, and the wind control device is arranged in the heat-exchange device lower end；The model casing includes organic glass block, heat preservation bed course and shell；The heat-exchange device includes top cover, heat preservation packing material, semiconductor devices, alloy rib and heat exchanger plates；The wind control device includes high performance fans, guide track system, adjustable support；The present invention realizes simulation soil body freeze thawing and wind erosion coupling, is able to reflect all climate characteristics of northwest Han Handiqu, can control freezing melt temperature and rate of change, can control that scene is natural and severe extreme wind speeds, keep test result stable, reliable.
Description
Technical field
The present invention relates to geo- textile techniques to measure experimental technique field, soil body freeze thawing under specifically a kind of centrifugal field
Wind erosion simulating on coupling loading device.
Background technique
Centrifugal model test is used widely in geotechnical engineering, solves the key technical problem of numerous complicated,
Foundation soil performance degradation problems especially during Important Project long service.With China's west lags far build progress,
Cold drought district railway, highway and water power etc. one is that the construction of class infrastructure project is also rapidly developed in succession.These engineerings are big
Pass through seasonal frozen soil region more, face the severe natural conditions such as dust storm erosion, unusual drought, extreme cold, and how from
The accurate application that above-mentioned cold nonirrigated farmland area boundary condition is realized under psychological field is that simulation is successfully crucial.But at present for freezing under centrifugal field
The research of foundation soil long term deterioration problem is deep not enough under warm wind erosion coupling, only rests at present some mechanistic
Discussion level, can be special in the cold nonirrigated farmland area freeze thawing in centrifugal field Imitating northwest China and wind erosion coupling weather there is an urgent need to research and develop one kind
The experiment loading unit of sign.
It is more single to the boundary condition of foundation soil application under centrifugal field from the point of view of current research, it is to freeze, melt
Change this kind of temperature boundary conditions, and precision, the control of rate of application and not perfect are applied to temperature.
As Chinese patent CN109083206A discloses a kind of test method of geotechnical centrifuge simulation Frozen-thawed cycled process
And device, it include model casing, transparent windows, cold and hot lid, measuring system, the model casing is mounted on geotechnical centrifuge
In suspension bucket, model casing is an open body structure in top；The lower end surface sealable lid of the cold and hot lid is located at model casing
Top is equipped with refrigerating plant, heating combined equipment on the lower end surface of cold and hot lid, thus by the soil in model casing carry out freezing or
Person is melted.Chinese patent CN104391103B discloses a kind of rainfall simulation method and device thereof for centrifugal model, including
The rainfall plate for being evenly equipped with 0.5mm aperture above centrifugal model is set, and rainfall plate is less than at a distance from centrifugal model top surface
10mm, rainfall plate top are provided at least one mounting rail, multiple rectangular nozzles are provided on mounting rail, are connected on water supply joint
There is an one-to-many adapter, adapter is connect by hose with rectangular nozzle, and the rectangular nozzle is direct-injection type pressure-type
Atomizer.Above-mentioned patent is the experimental rig for applying single boundary condition under centrifugal field, the stability of test result and
Limited reliability.
Therefore, soil body freeze thawing wind erosion simulating on coupling loading device under a kind of centrifugal field how is provided, to realize simulation
Soil body freeze thawing and wind erosion coupling, be able to reflect all climate characteristics of northwest Han Handiqu, can control freezing melt temperature and
Rate of change can control live natural and severe extreme wind speeds, and control precision height, keep test result stable, reliable, be mesh
Preceding those skilled in the art technical problem urgently to be resolved.
Summary of the invention
In view of this, the application's is designed to provide soil body freeze thawing wind erosion simulating on coupling load under a kind of centrifugal field
Device is able to reflect all climate characteristics of northwest Han Handiqu, can control to realize simulation soil body freeze thawing and wind erosion coupling
Freezing-thawing temperature and rate of change can control live natural and severe extreme wind speeds, and control precision height, make test result
Stablize, is reliable.
In order to achieve the above object, the application provides the following technical solutions.
Soil body freeze thawing is eroded simulating on coupling loading device under a kind of centrifugal field, including model casing, heat-exchange device and
Wind control device, the heat-exchange device and wind control device are arranged at the upper end of the model casing, the wind-force control
Device processed is arranged in the heat-exchange device lower end.
Preferably, the model casing is heat-insulated model casing, and the model casing includes organic glass block, heat preservation bed course and outer
Shell, the heat preservation bed course are arranged on the inside of the shell, and the heat preservation bed course is arranged in the heat preservation mat layer inside.
Preferably, the model casing further includes heat-insulating and sealing circle, heat-insulating and sealing circle setting organic glass cushion block with
Keep the temperature the position of bed course connection and the position of the adjacent connection of the organic glass cushion block.
Preferably, the heat preservation bed course is polyurethane material, and the shell is stainless steel material.
Preferably, the heat-exchange device includes top cover, heat preservation packing material, semiconductor devices, alloy rib and heat exchange
Plate, the semiconductor devices is arranged in the heat exchanger plates upper end, and is located inside the top cover；The heat preservation packing material setting
Inside the top cover；The alloy rib is arranged in the heat exchanger plates lower end.
Preferably, the heat preservation packing material is polystyrene material, and the top cover is stainless steel material, the heat exchanger plates
For aluminum alloy materials.
Preferably, the wind control device includes high performance fans, guide track system, adjustable support, the guide rail system
System is fixed on heat exchanger plates lower end.
Preferably, the adjustable support includes blower height control hole and vertical support frame, the blower height control hole
Be arranged on the side wall of the vertical support frame, the high performance fans are connect with the vertical support frame, and by screw with it is described
The connection of blower height control hole.
Preferably, the guide track system includes empty rail, ball and sliding block, and the sky rail is arranged inside the heat exchanger plates,
The sky rail matches with the sliding block, and ball setting is between the sliding block and empty rail；
The sliding block lower end is connect with the vertical support frame.
Preferably, which further includes route mounting hole, and the route mounting hole is column structure, and is passed through described
Heat-exchange device, the route mounting hole is for the route in reduced model case.
Preferably, route installation set and insulation plug are equipped in the route mounting hole, inside the route installation set
Equipped with screw thread, the insulation plug is connect by screw thread with route installation set.
The application method of soil body freeze thawing wind erosion simulating on coupling loading device under above-mentioned centrifugal field, comprising the following steps:
101, the similar scale for first determining ground soil model, using the peak load of centrifuge and the size of model casing as base
Plinth determines the final similar scale of simulation test；
102, according to the actual environment feature of engineering site, in conjunction with the similar scale in step 101, determine solidification point,
Freeze-off time, melt temperature, thawing time, wind direction, wind speed, wind speed duration and cycle-index；
103, the similar scale determined according to step 101 makes ground soil model in model casing, then at the top of model casing
Wind control device, heat-exchange device and route mounting hole are successively installed, while adjusting the position of sliding block and high performance fans 31,
Wind direction and wind speed are set, and the route in model casing is exported by route mounting hole, completes the assembly of analog loading device；
104, after step 103, analog loading device is placed into centrifugal basket by loop wheel machine；
105, after step 104, heat-exchange device and wind control device, adjustment Level One semiconductor device, second level half are opened
Electric current, voltage and the duration applied on conductor device applies forward current, carries out freezing to handle；
106, after step 105, heat-exchange device and wind control device, adjustment Level One semiconductor device, second level half are opened
Electric current, voltage and the duration applied on conductor device applies negative current, carries out thawing processing；
107, step 105 and 106 is repeated, until completing to freeze and thaw cycle processing.
Present invention advantageous effects obtained:
1) present invention solves the defect in the presence of the prior art, and the present invention realizes simulation soil body freeze thawing and wind erosion coupling
Close, be able to reflect all climate characteristics of northwest Han Handiqu, can control freezing melt temperature and rate of change, can control
Live natural and severe extreme wind speeds, and precision height is controlled, keep test result stable, reliable；
2) present invention realizes that carrying out freeze thawing and wind erosion coupling to foundation soil makees by heat-exchange device and wind control device
With processing；Using DC current by the semiconductor devices circuit converted with hot spot, generates neither endothermic nor exothermic phenomena simulation and freeze
Melt；Blast velocity control is realized using one or more concatenated modes using high-performance axial-flow type extension set；
3) present invention is by installing Level One semiconductor device and Level Two semiconductor devices in series, with Level Two semiconductor device
The overall semiconductor device connected is welded on heat exchanger plates upper end for bottom, realizes and carries out cooling/heating, is conducive to improve load
Efficiency.
Above description is only the general introduction of technical scheme, in order to better understand the technological means of the application,
So as to be implemented in accordance with the contents of the specification, and in order to allow the above and other objects, features and advantages energy of the application
It is enough clearer and more comprehensible, with the preferred embodiment of the application and cooperates attached drawing below detailed description is as follows.
According to the accompanying drawings to the detailed description of the application specific embodiment, those skilled in the art will be brighter
The above-mentioned and other purposes of the application, advantages and features.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the application
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.In all the appended drawings, similar element or part are generally identified by similar appended drawing reference.
In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural schematic diagram of experimental rig of the present invention；
Fig. 2 is the structural schematic diagram of interval hot-die molding box of the present invention；
Fig. 3 is the structural schematic diagram of heat-exchange device in the present invention；
Fig. 4 is the main view of apoplexy force control device of the present invention；
Fig. 5 is the side view of apoplexy force control device of the present invention；
Fig. 6 is the structural schematic diagram of route mounting hole in the present invention.
In the figures above: 1, model casing；11, organic glass cushion block；12, bed course is kept the temperature；13, shell；14, heat-insulating and sealing
Circle；2, heat-exchange device；21, top cover；22, packing material is kept the temperature；23, semiconductor devices；231, Level One semiconductor device；232,
Level Two semiconductor device；24, alloy rib；25, heat exchanger plates；3, wind control device；31, high performance fans；32, blower height
Control hole；33, vertical support frame；34, empty rail；35, ball；36, sliding block；4, route mounting hole；41, route installation set；42, it keeps the temperature
Heat-insulating plug.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.In the following description, such as specific configuration and component are provided
Specific detail just for the sake of help comprehensive understanding embodiments herein.It therefore, it will be apparent to those skilled in the art that can
To make various changes and modifications the embodiments described herein without departing from the scope and spirit of the present application.In addition, in order to clear
The description to known function and construction is omitted with succinctly in Chu in embodiment.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate: individualism A, individualism B exist simultaneously tri- kinds of situations of A and B, the terms
"/and " it is to describe another affiliated partner relationship, indicate may exist two kinds of relationships, for example, A/ and B, can indicate: individually depositing
In A, two kinds of situations of individualism A and B, in addition, character "/" herein, typicallying represent forward-backward correlation object is a kind of "or" pass
System.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion.
Embodiment 1
As shown in Fig. 1, soil body freeze thawing wind erosion simulating on coupling loading device under a kind of centrifugal field, including model casing 1,
Heat-exchange device 2 and wind control device 3, the heat-exchange device 2 and wind control device 3 are arranged at the model casing 1
Upper end, the wind control device 3 is arranged in 2 lower end of heat-exchange device.
The model casing 1 is heat-insulated model casing 1, disposes ground soil model in the heat-insulated model casing 1；As shown in Fig. 2,
The model casing 1 includes organic glass block 11, heat preservation bed course 12 and shell 13, and the heat preservation bed course 12 is arranged in the shell
13 insides, the setting of heat preservation bed course 12 is in 12 inside of heat preservation bed course.
Wherein, the heat preservation bed course 12 is polyurethane material, and the shell 13 is stainless steel material.
The model casing 1 further includes heat-insulating and sealing circle 14, the heat-insulating and sealing circle 14 setting organic glass cushion block 11 with
The position for keeping the temperature position and the adjacent connection of the organic glass cushion block 11 that bed course 12 connects, reduces model to the greatest extent
Thermal loss inside case 1.
As shown in Fig. 3, the heat-exchange device 2 includes top cover 21, heat preservation packing material 22, semiconductor devices 23, closes
Golden rib 24 and heat exchanger plates 25.
The top cover 21 is stainless steel material, and the heat preservation packing material 22 is polystyrene material, in the top cover 21
Portion is filled using heat preservation packing material 22, to reduce scattering and disappearing for heat.
On ground soil model top, the heat exchanger plates 25 are aluminum alloy materials, the heat exchanger plates for the setting of heat exchanger plates 25
25 effect is transmitting heat and fixed wind control device 3.
The semiconductor devices 23 is arranged in 25 upper end of heat exchanger plates, and is located inside the top cover 21, with the guarantor
Smaller spacing is provided between warm packing material 22；The semiconductor devices 23 includes multiple semiconductor devices 23, and mutually string
Connection installation, refrigeration and heating process are completed by different semiconductor devices 23 respectively, wherein and application forward current is process of refrigerastion,
Reverse current is heating operations.
Preferably, the semiconductor devices 23 includes Level One semiconductor device 231 and Level Two semiconductor device 232, according to
Level One semiconductor device 231 and Level Two semiconductor device 232 are successively installed in series by cooling/heating demand, with Level Two semiconductor device
The overall semiconductor device 23 connected is welded on 25 upper end of heat exchanger plates for bottom by part 232；Using Level One semiconductor device 231
Cooling/heating is carried out with the combined mode of Level Two semiconductor device 232, is conducive to improve loading efficiency.
The alloy rib 24 is fixed at 25 lower end of heat exchanger plates, and the alloy rib 24 includes a plurality of rib,
Using 60mm or more than alloy aluminium sheet be processed into a plurality of rib, increase cold and hot exchange area to the greatest extent, improve exchange effect
Rate.
Preferably, the alloy rib 24 is fixed on 25 lower end of heat exchanger plates by welding, is conducive to cold and hot energy
Conduction.
The wind control device 3 is for providing wind regime needed for eolian erosion；As shown in Fig. 4, the wind control dress
Setting 3 includes high performance fans 31, guide track system, adjustable support, and the guide track system is fixed on 25 lower end of heat exchanger plates.
As shown in Fig. 5, the guide track system includes empty rail 34, ball 35 and sliding block 36, and the sky rail 34 is arranged in institute
It states inside heat exchanger plates 25, the sky rail 34 matches with the sliding block 36, and the setting of the ball 35 is in the sliding block 36 and sky
Between rail 34, the sliding block 36 can rotation in empty rail 34 again, can be used to control wind direction by the rotation of sliding block 36.
The adjustable support includes blower height control hole 32 and vertical support frame 33, the vertical support frame 33 and sliding block 36
Lower end connection, the blower height control hole 32 is arranged on the side wall of the vertical support frame 33, the high performance fans 31 with
The vertical support frame 33 connects, and is connect by screw with the blower height control hole 32, can arbitrarily slide along guide track system,
The position of the high performance fans 31 is corresponding with blower height control hole 32, and the blower height control hole 32 can control high property
Energy fan 31 arrives the distance of foundation soil.
Preferably, the high performance fans 31 are high-performance axial-flow type extension set, are conducive to improve loading efficiency and extend dress
The service life set；The high-performance axial-flow type extension set is one or more concatenated modes, and specific number is by test objective
Wind speed determines.
The experimental rig further includes route mounting hole 4, and the route mounting hole 4 is column structure, and passes through the heat and hand over
Changing device 2, the route mounting hole 4 is for the route in reduced model case 1.
As shown in Fig. 6, route installation set 41 and insulation plug 42, the route are equipped in the route mounting hole 4
Installation set 41 is internally threaded, and the insulation plug 42 is connect by screw thread with route installation set 41, the insulation
Plug 42 is for hindering temperature to be lost by route mounting hole 4.In use, the route inside model casing 1 is first from route installation set
41 stretch out model casings 1, after insulation plug 42 is threaded into route installation set 41 according to 41 internal preset of route installation set
It is interior.
Analog loading device in the present embodiment completes soil body freeze thawing under centrifugal field and erodes for being used cooperatively with centrifuge
The simulation test of coupling is able to reflect all climate characteristics of northwest Han Handiqu, can control freezing melt temperature and
Rate of change can control live natural and severe extreme wind speeds, and control precision height, keep test result stable, reliable.
Embodiment 2
Based on the above embodiment, under a kind of centrifugal field the soil body freeze thawing wind erosion simulating on coupling loading device user
Method, comprising the following steps:
101, the similar scale for first determining ground soil model, using the peak load of centrifuge and the size of model casing 1 as base
Plinth determines the final similar scale of simulation test；
102, according to the actual environment feature of engineering site, in conjunction with the similar scale in step 101, determine solidification point,
Freeze-off time, melt temperature, thawing time, wind direction, wind speed, wind speed duration and cycle-index；
103, the similar scale determined according to step 101 makes ground soil model in model casing 1, and then model casing 1 pushes up
Wind control device 3, heat-exchange device 2 and route mounting hole 4 are successively installed by portion, while adjusting sliding block 36 and high performance fans 31
Position, set wind direction and wind speed, and the route in model casing is exported by route mounting hole 4, complete simulation loading dress
The assembly set；
104, after step 103, analog loading device is placed into centrifugal basket by loop wheel machine；
105, after step 104, heat-exchange device 2 and wind control device 3 are opened, adjusts Level One semiconductor device 231, two
Electric current, voltage and the duration applied on level semiconductor device 232 applies forward current, carries out freezing to handle；
106, after step 105, heat-exchange device 2 and wind control device 3 are opened, adjusts Level One semiconductor device 231, two
Electric current, voltage and the duration applied on level semiconductor device 232 applies negative current, carries out thawing processing；
107, step 105 and 106 is repeated, until completing to freeze and thaw cycle processing.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit protection scope of the present invention, right
For those skilled in the art, the invention may be variously modified and varied.All within the spirits and principles of the present invention,
By conventional substitution or it can be realized identical function without departing from the principles and spirit of the present invention to these
Embodiment is changed, modifies, replacing, integrating and parameter modification is fallen within the protection scope of the present invention.
Claims (10)
1. under a kind of centrifugal field soil body freeze thawing erode simulating on coupling loading device, which is characterized in that including model casing (1),
Heat-exchange device (2) and wind control device (3), the heat-exchange device (2) and wind control device (3) are arranged at described
The upper end of model casing (1), the wind control device (3) are arranged in the heat-exchange device (2) lower end.
2. soil body freeze thawing wind erosion simulating on coupling loading device under centrifugal field according to claim 1, which is characterized in that
The model casing (1) be heat-insulated model casing (1), the model casing (1) include organic glass block (11), heat preservation bed course (12) and
Shell (13), on the inside of the shell (13), the heat preservation bed course (12) is arranged in the guarantor for heat preservation bed course (12) setting
On the inside of warm bed course (12).
3. soil body freeze thawing wind erosion simulating on coupling loading device under centrifugal field according to claim 2, which is characterized in that
The model casing (1) further includes heat-insulating and sealing circle (14), the heat-insulating and sealing circle (14) setting organic glass cushion block (11) with
Keep the temperature the position of bed course (12) connection and the position of the adjacent connection of the organic glass cushion block (11).
4. soil body freeze thawing wind erosion simulating on coupling loading device under centrifugal field according to claim 1-3,
It is characterized in that, the heat-exchange device (2) includes top cover (21), heat preservation packing material (22), semiconductor devices (23), alloy rib
Muscle (24) and heat exchanger plates (25), the semiconductor devices (23) are arranged in the heat exchanger plates (25) upper end, and are located at the top cover
(21) internal；Heat preservation packing material (22) setting is internal in the top cover (21)；The alloy rib (24) is arranged in institute
State heat exchanger plates (25) lower end.
5. soil body freeze thawing wind erosion simulating on coupling loading device under centrifugal field according to claim 1-3,
It is characterized in that, the wind control device (3) includes high performance fans (31), guide track system, adjustable support, the guide rail system
System is fixed on heat exchanger plates (25) lower end.
6. soil body freeze thawing wind erosion simulating on coupling loading device under centrifugal field according to claim 5, which is characterized in that
The adjustable support includes blower height control hole (32) and vertical support frame (33), blower height control hole (32) setting
On the side wall of the vertical support frame (33), the high performance fans (31) connect with the vertical support frame (33), and pass through spiral shell
Silk is connect with the blower height control hole (32).
7. soil body freeze thawing wind erosion simulating on coupling loading device under centrifugal field according to claim 5, which is characterized in that
The guide track system includes empty rail (34), ball (35) and sliding block (36), and the sky rail (34) is arranged in the heat exchanger plates (25)
Inside, the sky rail (34) match with the sliding block (36), and the ball (35) setting is in the sliding block (36) and empty rail
(34) between；
Sliding block (36) lower end is connect with the vertical support frame (33).
8. soil body freeze thawing wind erosion simulating on coupling loading device under centrifugal field according to claim 1-3,
It is characterized in that, which further includes route mounting hole (4), and the route mounting hole (4) is column structure, and is passed through described
Heat-exchange device (2), the route mounting hole (4) is for the route in reduced model case (1).
9. soil body freeze thawing wind erosion simulating on coupling loading device under centrifugal field according to claim 8, which is characterized in that
Route installation set (41) and insulation plug (42) are equipped in the route mounting hole (4), the route installation set (41) is internal
Equipped with screw thread, the insulation plug (42) is connect by screw thread with route installation set (41).
10. soil body freeze thawing wind erosion simulating on coupling loading device makes under any one of -9 centrifugal fields according to claim 1
With method, comprising the following steps:
101, the similar scale for first determining ground soil model, based on the peak load of centrifuge and the size of model casing (1),
Determine the final similar scale of simulation test；
102, it determines solidification point in conjunction with the similar scale in step (101) according to the actual environment feature of engineering site, freeze
Tie time, melt temperature, thawing time, wind direction, wind speed, wind speed duration and cycle-index；
103, the similar scale determined according to step 101 makes ground soil model in model casing (1), and then model casing (1) pushes up
Wind control device (3), heat-exchange device (2) and route mounting hole (4) are successively installed by portion, while adjusting sliding block (36) and high property
The position of energy fan (31) sets wind direction and wind speed, and the route in model casing is exported by route mounting hole (4), complete
At the assembly of analog loading device；
104, after step 103, analog loading device is placed into centrifugal basket by loop wheel machine；
105, after step 104, unlatching heat-exchange device (2) and wind control device (3), adjustment Level One semiconductor device (231),
Electric current, voltage and the duration applied on Level Two semiconductor device (232) applies forward current, carries out freezing to handle；
106, after step 105, unlatching heat-exchange device (2) and wind control device (3), adjustment Level One semiconductor device (231),
Electric current, voltage and the duration applied on Level Two semiconductor device (232) applies negative current, carries out thawing processing；
107, step 105 and 106 is repeated, until completing to freeze and thaw cycle processing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485180A (en) * | 2020-10-13 | 2021-03-12 | 中国水利水电科学研究院 | Sand collector system for determining wind erosion rate and method for determining wind erosion rate |
| CN114486711A (en) * | 2022-03-28 | 2022-05-13 | 中国科学院东北地理与农业生态研究所 | Earth freezes and melts wind erosion analogue measurement device |
| CN116148306A (en) * | 2023-04-21 | 2023-05-23 | 石家庄铁道大学 | Bidirectional freezing test device and bidirectional freezing test parameter debugging method |
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