CN108037268A - A kind of controllable temperature body frost heaving experimental rig - Google Patents
A kind of controllable temperature body frost heaving experimental rig Download PDFInfo
- Publication number
- CN108037268A CN108037268A CN201711389266.XA CN201711389266A CN108037268A CN 108037268 A CN108037268 A CN 108037268A CN 201711389266 A CN201711389266 A CN 201711389266A CN 108037268 A CN108037268 A CN 108037268A
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- cylinder
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- upper plate
- lower plate
- soil body
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
Abstract
The invention discloses a kind of controllable temperature body frost heaving experimental rig, overcome the problem of can not fully simulating soil body field frost heave, it includes experiment casing (1), environment temperature control system, soil temperature monitoring system, information acquisition system (14) and computer (15).Experiment casing (1) includes main box and soil body sample cylinder (2), and partition plate (12) is set in main box；Soil body sample cylinder (2) includes upper plate (3), lower plate (4) and cylinder (5)；2 sets of cooling/heating devices (13) of environment temperature control system and upper plate (3) are connected with the upper circulation liquid pipe (9) of lower plate (4) with lower circulation liquid pipe (10), in 4 plug-type temperature sensors (11) insertion cylinder (5) interior soil body sample of soil temperature monitoring system, the information terminal of 4 plug-type temperature sensors (11) is connected with information acquisition system (14) line；Information acquisition system (14) is connected with computer (15).
Description
Technical field
The present invention relates to a kind of experimental rig for belonging to geotechnical engineering test apparatus technical field, more precisely, this hair
It is bright to be related to a kind of controllable temperature body frost heaving experimental rig.
Background technology
Frozen soil under frost heave action its performance characteristic change be always cyopedology difficult point where, itself main reason is that
Laboratory test condition does not reach actual requirement, with can not ensureing small error thermostatic control, and can not realize that small temperature gradient changes
Solidification point, so as to cause experiment, time-consuming, and result of the test error is larger, when equipment reaches requirement in temperature, it is impossible to
Accurately ensure constant temperature effect, and the change of chamber external environment condition has a great influence experiment the temperature inside the box.Conventional test methods one
As be that a certain temperature is set in general Frozen-thawed cycled case first, then test specimen is directly placed into Frozen-thawed cycled case, is frozen
Knot, but the change of ambient temperature has a great influence for Frozen-thawed cycled the temperature inside the box, and using air cooling pair in Frozen-thawed cycled case
Test specimen is freezed, and causes test specimen to be endured cold inequality, and last solidification point is larger with envisioning solidification point error.
The frost heave of the soil body is an extremely complex process, it is with physics, physical chemistry, the phenomenon of mechanics and sub- mistake
Journey, the most important accumulation process for including moisture, the transmission of heat, moisture phase transformation and salinity.China is the 3rd frozen soil in the world
Big country, ever-frozen ground area 2.15 × 106km2, seasonal frozen ground area 5.14 × 106km2。
Frozen soil is a kind of soil medium extremely sensitive to temperature, with the accumulation of moisture and salinity in frozen-thaw process,
In turn result in frost zone and produce frost heave and thaw collapse phenomenon, and build engineering to permafrost region and road and bridge engineering cause certain journey
The destruction of degree, problem of frost heave seriously annoying the service condition of structures on the frozen soil foundation of severe cold area, and documents and materials show, freeze
Bursting badly makes the Permafrost area road lost of life 50%, and considerably increases maintenance costs.
The research of the variation characteristic of soil body physical characteristic is frozen soil engineering, frozen soil agricultural, terrestrial water circulation under the conditions of frost heave
Deng the important content in field.It is studied mainly is achieved by indoor simulation and outdoor two kinds of approach of fixed point monitoring, and by
It is costly in outdoor-monitoring, poor repeatability, therefore the domestic measure to frozen soil physical property selects the side of indoor simulation mostly
Formula carries out.
Existing country's frost heave test device has following feature, is that apparatus function is more single first, many frozen soil experiment dresses
One or two index can only be measured by putting.Secondly device cannot simulate soil body field freezing process well mostly, some is ground
Study carefully unit and earth pillar is directly put into refrigerator, the soil body freezes from four circumferential centers, with the top-down temperature-fall period in actual field not
Symbol.Some experimental rig earth pillars are meticulous, and earth pillar diameter is less than 10cm, and tube wall has and influences Freezing Soils outside to inside, also with
The very big difference of field physical presence.
The content of the invention
The technical problems to be solved by the invention are to overcome the soil body field existing in the prior art that can not fully simulate to freeze
A kind of swollen problem, there is provided controllable temperature body frost heaving experimental rig.
In order to solve the above technical problems, the present invention adopts the following technical scheme that realization：A kind of controllable temperature soil
Body frost heave test device includes experiment casing, environment temperature control system, soil temperature monitoring system, information acquisition system and meter
Calculation machine；
The experiment casing includes the main box and soil body sample cylinder of cuboid, and the internal water level land of main box is set
There is partition plate；
The soil body sample cylinder is cylindrical shell structure part, and soil body sample cylinder includes upper plate, lower plate and cylinder
Body；Soil body sample cylinder is fixed on the partition plate in the middle part of experiment casing by lower plate；
The identical cooling/heating device of 2 nested structures in environment temperature control system is using upper conduit and downcomer and setting
It is connected in upper plate with the upper circulation liquid pipe inside lower plate with the both ends of lower circulation liquid pipe, the identical cooling/heating dress of 2 nested structures
In the bottom for putting the experiment casing below partition plate；The identical plug-in type temperature of 4 structures in soil temperature monitoring system
Degree sensor is inserted into the soil body sample in cylinder, and the information terminal of the identical plug-type temperature sensor of 4 structures passes through
Electric wire is connected with information acquisition system, and information acquisition system is connected with computer by USB.
Upper plate described in technical solution is made of upper plate top half and upper plate the latter half, upper plate upper half
Part and upper plate the latter half are the cylindrical hull structural part of open at one end, are set on the head cover of upper plate top half
There is the identical upper plate through hole of two structures of the upper conduit in installation environment temperature control system；
The cavity arrangements of the upper plate the latter half of the upper plate have upper circulation liquid pipe, the two ends of upper circulation liquid pipe
The lower end of upper conduit with being inserted into from upper plate through hole is connected；
For the upper plate top half spiral-lock into upper plate on upper plate the latter half, upper plate is cylindrical housings
Structural member, upper plate are made of stainless steel.
Lower plate described in technical solution is made of lower plate top half and lower plate the latter half, lower plate upper half
Part and the cylindrical hull structural part that lower plate the latter half is open at one end；
The inner cavity of the lower plate the latter half is provided with lower circulation liquid pipe, is set on the bottom plate of lower plate the latter half
Have a downcomer through hole that the structure of 2 installation downcomers is identical, lower plate top half spiral-lock on lower plate the latter half into
Lower plate, lower plate are Cylindrical housing structure part, and lower plate is made of stainless steel.
Cylinder described in technical solution is cylinder mode part, the internal diameter and upper plate of cylinder and the outside diameter phase of lower plate
Deng, wall thickness is 10mm~15mm, is vertically provided with 4 cylinder through holes on the barrel of cylinder, cylinder through hole it is a diameter of
20~25mm, the centre distance of adjacent 2 cylinder through holes is 80~90mm, and the cylinder for containing the soil body to be measured uses organic glass
Glass material is made；Lower plate is fixed on the partition plate in the middle part of experiment casing by welding manner, and the bottom of cylinder is sleeved on bottom
On plate, upper plate is covered on the top of cylinder；The height of soil body sample cylinder is 400~440mm.
Compared with prior art the beneficial effects of the invention are as follows：
1. a kind of environment temperature control system of controllable temperature body frost heaving experimental rig of the present invention can be simulated fully
Natural environment frost heave condition, temperature, circulation liquid pipe are laid in upper plate with lower plate, making the experiment soil body be cooled to people in order to control
(heat) uniformly, is consistent with natural conditions, improves experiment accuracy；
2. a kind of information acquisition system of controllable temperature body frost heaving experimental rig of the present invention is according to 4 temperature sensing
The data that device transmits, can monitor change of temperature field in the soil body, be of great significance for soil body research under the conditions of frost heave.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings：
Fig. 1 is a kind of schematic diagram of controllable temperature body frost heaving experimental rig structure composition of the present invention；
Fig. 2 is the soil body sample barrel structure group employed in a kind of controllable temperature body frost heaving experimental rig of the present invention
Into axonometric projection view；
Fig. 3-1 is the upper of the soil body sample cylinder employed in a kind of controllable temperature body frost heaving experimental rig of the present invention
The axonometric projection view of top plate top half structure composition；
Fig. 3-2 is the upper of the soil body sample cylinder employed in a kind of controllable temperature body frost heaving experimental rig of the present invention
The axonometric projection view of top plate the latter half structure composition；
Fig. 4-1 is under the soil body sample cylinder employed in a kind of controllable temperature body frost heaving experimental rig of the present invention
The axonometric projection view of bottom plate top half structure composition；
Fig. 4-2 is under the soil body sample cylinder employed in a kind of controllable temperature body frost heaving experimental rig of the present invention
The axonometric projection view of bottom plate the latter half structure composition；
In figure：1. experiment casing, 2. soil body sample cylinders, 3. upper plates, 4. lower plates, 5. cylinders, 6. cylinder through holes, on 7.
Conduit, 8. downcomers circulate liquid pipe on 9., 10. times circulation liquid pipes, 11. plug-type temperature sensors, 12. partition plates, and 13. refrigeration/
Thermal, 14. information acquisition systems, 15. computers.
Embodiment
The present invention is explained in detail below in conjunction with the accompanying drawings：
Refering to Fig. 1, a kind of controllable temperature body frost heaving experimental rig of the present invention includes experiment casing 1, environment temperature
Control system, soil temperature monitoring system, information acquisition system 14 and computer 15.
The experiment casing 1 includes main box and soil body sample cylinder 2, and main box is the shell structure part of cuboid,
The inner space of experiment casing 1 uses partition plate 12 to be divided to for upper and lower two parts；
Refering to Fig. 1 and Fig. 2, the soil body sample cylinder 2 is the shell structure part of cylinder, and soil body sample cylinder 2 includes upper
Top plate 3, lower plate 4 and cylinder 5.
Refering to Fig. 3-1 and Fig. 3-2, the upper plate 3 is made of upper plate top half and upper plate the latter half, on
Top plate top half and the cylindrical hull structural part that upper plate the latter half is open at one end, the top of upper plate top half
Cover and be provided with the identical upper top cover through hole of two structures for installing conduit 7.
The inner cavity of the upper plate the latter half is provided with circulation liquid pipe 9, the two ends of upper circulation liquid pipe 9 with from upper
The lower end of the upper conduit 7 of upper top cover through hole insertion on the head cover of top plate top half is connected.
For the upper plate top half spiral-lock into upper plate 3 on upper plate the latter half, upper plate 3 is circular cylindrical shell
Body structural member, the height of upper plate 3 is 40mm, outside diameter 200mm in embodiment；Upper plate 3 can be moved freely in experiment casing 1
Dynamic, upper plate 3 is made of stainless steel, is transported to cold heat liquid by upper conduit 7 using cooling/heating device 13
Temperature control is realized in circulation liquid pipe 9.
Refering to Fig. 4-1 and Fig. 4-2, the lower plate 4 is made of lower plate top half and lower plate the latter half, under
Bottom plate top half and the cylindrical hull structural part that lower plate the latter half is open at one end.
The inner cavity of the lower plate the latter half be provided with it is lower circulation liquid pipe 10, it is lower circulation liquid pipe 10 head and the tail both ends and
Downcomer 8 connects, and the downcomer through hole of 2 installation downcomers 8, lower plate upper half are provided with the bottom plate of lower plate the latter half
For part spiral-lock into lower plate 4 on lower roof plate the latter half, lower plate 4 is Cylindrical housing structure part, lower plate 4 in embodiment
Height be 40mm, outside diameter 200mm；Cold heat liquid is transported to by lower circulation by downcomer 8 using cooling/heating device 13
Temperature control is realized in liquid pipe 10；Lower plate 4 is fixed on by welding manner on the partition plate 12 at the middle part of experiment casing 1, and lower plate 4 uses
Stainless steel is made.
The cylinder 5 is cylinder mode part, is used to contain the soil body to be measured in cylinder 5, cylinder 5 uses organic glass material
Matter is made, and the internal diameter and upper plate 3 of cylinder 5 are equal with the outside diameter of lower plate 4, and wall thickness is 10mm~15mm, on the barrel of cylinder 5
Vertically it is provided with 4 cylinder through holes 6, a diameter of 20~25mm of cylinder through hole 6, the center of adjacent 2 cylinder through holes 6
Distance is 80~90mm.
The height of the soil body sample cylinder 2 is 400~440mm.
The environment temperature control system includes identical cooling/heating device 13, upper conduit 7 and the downcomer of 2 nested structures
8；
The upper conduit 7 and downcomer 8 are connected with a set of cooling/heating device 13 respectively；
The cooling/heating device 13 is market standard Air-Cooled Heat Pump Unit, such as beautiful G type air-cooled heat pump module units
Deng；
The identical cooling/heating device 13 of 2 nested structures is placed on the master of the experiment casing 1 of the lower section of partition plate 12 of experiment casing 1
In the bottom of babinet, the identical cooling/heating device 13 of 2 nested structures is respectively adopted in conduit 7, downcomer 8 and soil body sample cylinder 2
Be arranged on upper plate 3 and the upper circulation liquid pipe 9 inside lower plate 4 and lower circulation liquid pipe 10 is connected.
The cooling/heating device 13 is connected by control terminal with information acquisition system 14 with USB interface；
The soil temperature monitoring system includes the identical plug-type temperature sensor 11 of 4 structures；
The plug-type temperature sensor 11 is market general-purpose type temperature sensor, for example Decagon 5TM temperature passes
Sensor etc., 11 front end of plug-type temperature sensor are stainless steel column body, and middle part is information terminal, information terminal by electric wire with
Information acquisition system connects；
The identical plug-type temperature sensor 11 of 4 structures is connected with information acquisition system 14 by USB interface, plug-in type
Temperature sensor 11 is inserted into the soil body to be measured when using by cylinder through hole 6, and data are collected by information acquisition system 14.
The information acquisition system 14 is connected with computer 15 by USB, and information acquisition system 14 is put with computer 15
Put on the right side of experiment casing 1.
The information acquisition system 14 is the structural member of a cuboid, it is market general-purpose type dynamic signal testing point
Analyzer, for example general survey control NUXI-1004/8 dynamic signalling analysis instrument etc. is opened up, processing list is collected in inside containing integrated information
Member, is in the market standard product；
A kind of operation principle of the controllable temperature body frost heaving experimental rig：
In frost heave cyclic test, first 1 top of experiment casing is opened, the cylinder 5 of soil body sample cylinder 2 is placed on the soil body
On the lower plate 4 of test specimen tube 2, soil body sample is fitted into cylinder 5, plug-type temperature sensor 11 is inserted by cylinder through hole 6
Enter in soil body sample, then cover upper plate 3 on the top of cylinder 5, then close 1 top of experiment casing, start information
Acquisition system 14 and computer 15, the temperature of upper plate 3 and lower plate 4 is set by computer 15, completes experiment.
The foregoing is merely being illustrated with reference to this manufacturing process, this structure is not intended to limit, for the technology of this area
For personnel, the present invention can have a various change and change, such as the combinations of multiple entities, conversion material therefor etc..It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on, should be included in the protection of the present invention
Within the scope of.
Claims (4)
- A kind of a kind of 1. controllable temperature body frost heaving experimental rig, it is characterised in that controllable temperature body frost heaving experimental rig Including experiment casing (1), environment temperature control system, soil temperature monitoring system, information acquisition system (14) and computer (15)；The experiment casing (1) includes the main box and soil body sample cylinder (2) of cuboid, and the internal water level land of main box is set It is equipped with partition plate (12)；The soil body sample cylinder (2) is cylindrical shell structure part, and soil body sample cylinder (2) includes upper plate (3), lower plate (4) with cylinder (5)；Soil body sample cylinder (2) is fixed on the partition plate (12) in the middle part of experiment casing (1) by lower plate (4)；Conduit (7) and downcomer (8) in identical cooling/heating device (13) use of 2 nested structures in environment temperature control system It is connected with upper plate (3) is arranged on the internal upper circulation liquid pipe (9) of lower plate (4) with the both ends of lower circulation liquid pipe (10), 2 sets The identical cooling/heating device (13) of structure is installed in the bottom of the experiment casing (1) below partition plate (12)；Soil temperature monitors The identical plug-type temperature sensor (11) of 4 structures in system is inserted into the soil body sample in cylinder (5), 4 structures The information terminal of identical plug-type temperature sensor (11) is connected by electric wire with information acquisition system (14), information gathering system System (14) is connected with computer (15) by USB.
- 2. a kind of body frost heaving experimental rig for carrying out water salt supply described in accordance with the claim 1, it is characterised in that described Upper plate (3) be made of upper plate top half and upper plate the latter half, upper plate top half and upper plate lower half Point it is the cylindrical hull structural part of open at one end, installation environment temperature control is provided with the head cover of upper plate top half The identical upper plate through hole of two structures of the upper conduit (7) in system；The cavity arrangements of the upper plate the latter half of the upper plate (3) have upper circulation liquid pipe (9), upper circulation liquid pipe (9) The lower end of upper conduit (7) of the two ends with being inserted into from upper plate through hole is connected；For the upper plate top half spiral-lock into upper plate (3) on upper plate the latter half, upper plate (3) is circular cylindrical shell Body structural member, upper plate (3) are made of stainless steel.
- 3. a kind of body frost heaving experimental rig for carrying out water salt supply described in accordance with the claim 1, it is characterised in that described Lower plate (4) be made of lower plate top half and lower plate the latter half, lower plate top half and lower plate lower half Point it is the cylindrical hull structural part of open at one end；The inner cavity of the lower plate the latter half is provided with lower circulation liquid pipe (10), is set on the bottom plate of lower plate the latter half There is the identical downcomer through hole of the structure of 2 installation downcomers (8), lower plate top half spiral-lock is on lower plate the latter half Into lower plate (4), lower plate (4) is Cylindrical housing structure part, and lower plate (4) is made of stainless steel.
- 4. a kind of body frost heaving experimental rig for carrying out water salt supply described in accordance with the claim 1, it is characterised in that described Cylinder (5) be cylinder mode part, the internal diameter and upper plate (3) of cylinder (5) are equal with the outside diameter of lower plate (4), and wall thickness is 10mm~15mm, is vertically provided with 4 cylinder through holes (6) on the barrel of cylinder (5), cylinder through hole (6) it is a diameter of 20~25mm, the centre distance of adjacent 2 cylinder through holes (6) is 80~90mm, and the cylinder (5) for containing the soil body to be measured uses Organic glass material is made；Lower plate (4) is fixed on the partition plate (12) in the middle part of experiment casing (1) by welding manner, cylinder (5) bottom is sleeved on lower plate (4), and upper plate (3) is covered on the top of cylinder (5)；The height of soil body sample cylinder (2) is 400~440mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711389266.XA CN108037268A (en) | 2017-12-21 | 2017-12-21 | A kind of controllable temperature body frost heaving experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711389266.XA CN108037268A (en) | 2017-12-21 | 2017-12-21 | A kind of controllable temperature body frost heaving experimental rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108037268A true CN108037268A (en) | 2018-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711389266.XA Pending CN108037268A (en) | 2017-12-21 | 2017-12-21 | A kind of controllable temperature body frost heaving experimental rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932387A (en) * | 2019-04-08 | 2019-06-25 | 大连理工大学 | Body frost heaving and freezing front test device and implementation method based on image recognition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN109932387B (en) * | 2019-04-08 | 2021-08-17 | 大连理工大学 | Soil body frost heaving and freezing frontal surface testing device based on image recognition and implementation method |
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