CN113125496A - Portable multifunctional small-sized freezing simulation test system and simulation method - Google Patents
Portable multifunctional small-sized freezing simulation test system and simulation method Download PDFInfo
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- 238000004088 simulation Methods 0.000 title claims abstract description 54
- 238000007710 freezing Methods 0.000 title claims abstract description 53
- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 230000008014 freezing Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 282
- 239000002689 soil Substances 0.000 claims abstract description 93
- 238000012544 monitoring process Methods 0.000 claims abstract description 77
- 230000017525 heat dissipation Effects 0.000 claims abstract description 76
- 238000009413 insulation Methods 0.000 claims abstract description 72
- 230000000007 visual effect Effects 0.000 claims abstract description 68
- 238000005057 refrigeration Methods 0.000 claims abstract description 66
- 238000004891 communication Methods 0.000 claims abstract description 31
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 7
- 239000000523 sample Substances 0.000 claims description 118
- 230000001502 supplementing effect Effects 0.000 claims description 17
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 7
- 230000003020 moisturizing effect Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims 1
- 238000013508 migration Methods 0.000 abstract description 3
- 230000005012 migration Effects 0.000 abstract description 3
- 238000010257 thawing Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
Abstract
The invention discloses a portable multifunctional small-sized freezing simulation test system and a simulation method, which comprise a visual heat insulation box, a refrigeration plate, a heat dissipation plate, a clear water circulating system and a monitoring system, wherein the bottom end of the visual heat insulation box is tightly attached to the refrigeration plate in a seamless manner, the heat dissipation plate is positioned below the refrigeration plate, and a curved clear water channel is arranged inside the refrigeration plate; the water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the refrigeration plate, and the water outlet end of the clear water channel of the refrigeration plate is in fluid communication with the water inlet end of the clear water circulating system; the monitoring system comprises a temperature monitoring system and a frost heaving displacement monitoring system and is used for monitoring the temperature and the frost heaving displacement of the soil sample in the visual heat insulation box. The invention can simulate the parameters of soil layer temperature, frost heaving and thawing sinking, water migration and the like under single and bidirectional freezing conditions in any scene; the device is simple to erect, can be disassembled after testing, can be repeatedly used, and has the advantages of simple assembly, low cost, multiple functions, stable performance, strong applicability and the like.
Description
Technical Field
The invention relates to the technical field of freezing simulation tests. In particular to a portable multifunctional small-sized freezing simulation test system and a simulation method.
Background
The artificial freezing method is a special stratum reinforcing method for freezing the stratum around the structure to be built into a continuous closed frozen soil body by utilizing an artificial refrigeration technology. The construction method has the advantages of isolating underground water, increasing soil body strength, improving stability, being free of pollution and the like, and is widely applied to mine construction, subway construction, foundation pit and comprehensive pipe gallery construction. However, at present, single-direction and two-direction freezing tests for manual freezing are influenced by high cost and limited quantity of test equipment, undisturbed soil must be transported to a test room and remolded and processed in a frost heaving machine, the requirements of site in-situ test places and random time cannot be met, and the phenomenon that the experimental equipment is not arranged to cause the utilization of experience parameters often occurs. Therefore, a portable multifunctional novel single-direction and two-direction frozen wall development simulation test system is urgently needed at present, and the requirements of tests which can be carried out at any scene and at any time can be met. The system has important significance for innovation of an artificial frozen wall test method.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a portable multifunctional small-sized single-direction and two-direction freezing simulation test system and a simulation method, which can be realized in any scene, can be simply erected, and can monitor the functions of cold source, heat insulation, temperature and displacement monitoring, water replenishing and automatic alarm in the freezing process.
In order to solve the technical problems, the invention provides the following technical scheme:
a portable multifunctional small-sized freezing simulation test system comprises a visual heat insulation box, a refrigeration plate, a heat dissipation plate, a clear water circulation system and a monitoring system,
the bottom end of the visual heat insulation box is tightly attached to the refrigeration plate in a seamless mode, the heat dissipation plate is located below the refrigeration plate, and a curved clear water channel is arranged inside the heat dissipation plate; the water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the heat dissipation plate, and the water outlet end of the clear water channel of the heat dissipation plate is in fluid communication with the water inlet end of the clear water circulating system; the monitoring system comprises a temperature monitoring system and a frost heaving displacement monitoring system and is used for monitoring the temperature change and frost heaving displacement of the soil sample in the visual heat insulation box; the side wall surface of the soil sample is wrapped by a PVC pipe.
In the portable multifunctional small-sized freezing simulation test system, 6-8 refrigerating sheets are arranged on the refrigerating plate, the refrigerating plate is connected with the temperature controller, and the temperature of the refrigerating plate is controlled by the temperature controller; the clear water channel in the heat dissipation plate is divided into a left independent channel and a right independent channel, and the independent clear water channels are respectively communicated with the clear water circulating system.
The portable multifunctional small freezing simulation test system comprises a clean water tank, a cold exhaust fan, a small pump and a temperature alarm, wherein the water outlet end of the clean water tank is communicated with the water inlet end of the clean water channel of the heat dissipation plate through a water outlet pipeline, and the small pump is arranged on the water outlet pipeline; the water inlet end of the clear water tank is communicated with the fluid at the water outlet end of the clear water channel of the heat dissipation plate through a water inlet pipeline, and the cold exhaust fan is arranged on the water inlet pipeline; and a temperature test probe of the temperature alarm extends into the clear water tank, is in contact with clear water in the clear water tank and is used for monitoring the temperature of the clear water.
The utility model provides an above-mentioned portable multi-functional small-size analogue test system that freezes, temperature monitoring system includes soil sample temperature probe and temperature monitoring module, soil sample temperature probe is even arranges in soil sample along soil sample direction of height, soil sample temperature probe's signal output part with the signal input part communication connection of temperature monitoring module realizes the real-time supervision to soil sample temperature.
The utility model provides an above-mentioned portable multi-functional small-size analogue test system that freezes, frost heaving displacement monitoring system is the laser instrument visual heat-insulating box surface pastes the scale, utilizes the laser instrument record different changes of moment soil sample top height, and the conversion frost heaving volume realizes the real-time supervision to soil sample frost heaving displacement.
According to the portable multifunctional small-sized freezing simulation test system, the visual heat insulation box is made of double-layer acrylic plates, and the thickness of the visual heat insulation box is 2-3 cm; and after the two layers of acrylic plates are tightly attached, applying a sealing ring and vacuumizing the middle.
Above-mentioned portable multi-functional small-size analogue test system that freezes if carry out one-way when freezing the simulation the top of visual heat insulating box sets up the top cap, the top cap is thickness 5 cm's ya keli board, the top cap with the inseparable back of laminating in visual heat insulating box top, applys the sealing washer.
According to the portable multifunctional small freezing simulation test system, if unidirectional freezing simulation is carried out, a water replenishing system is required to be arranged; the water replenishing system comprises a Ma bottle and a water replenishing channel, a water outlet of the Ma bottle is in fluid communication with a water inlet of the water replenishing channel, and a ruler is pasted on the outer surface of the Ma bottle to record the amount of water replenishing; the water replenishing channel penetrates through the top cover, enters the visible heat insulation box and is inserted into the top of the soil sample; the water supplementing channel and the top cover are sealed through a rubber ring.
Above-mentioned portable multi-functional small-size analogue test system that freezes, if when carrying out the two-way simulation of freezing the top of visual heat insulation box sets up the refrigeration board, its structure with the refrigeration board of visual heat insulation box bottom is the same go up the top of refrigeration board and set up the heating panel, go up the heating panel the structure with the heating panel structure of visual heat insulation box bottom is the same.
A portable multifunctional small-sized freezing simulation method utilizes the portable multifunctional small-sized freezing simulation test system to carry out freezing simulation; the method specifically comprises the following steps:
(A) actually collecting a soil sample on site, wrapping the outer side wall surface of the soil sample with a PVC pipe for assembly, placing the soil sample in a visible heat insulation box, and uniformly arranging soil sample temperature probes along the height direction of the soil sample;
(B) a refrigeration plate is arranged at the bottom end of the visual heat insulation box and is connected with a temperature controller through a lead to control and monitor the temperature of the refrigeration plate;
(C) the clear water channel of the heat dissipation plate is communicated with the clear water circulating system; the water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the heat dissipation plate, and the water outlet end of the clear water channel of the heat dissipation plate is in fluid communication with the water inlet end of the clear water circulating system; the clear water circulating system comprises a clear water tank, a cold exhaust fan, a miniature pump and a temperature alarm, wherein the water outlet end of the clear water tank is communicated with the fluid at the water inlet end of the clear water channel of the refrigeration plate through a water outlet pipeline, and the miniature pump is arranged on the water outlet pipeline; the water inlet end of the clear water tank is communicated with the fluid at the water outlet end of the clear water channel of the refrigeration plate through a water inlet pipeline, and the cold exhaust fan is arranged on the water inlet pipeline; a temperature test probe of the temperature alarm extends into the clear water tank, is in contact with clear water in the clear water tank and is used for monitoring the temperature of the clear water;
(D) setting a monitoring system: the temperature monitoring system comprises a soil sample temperature probe and a temperature monitoring module; the signal output end of the soil sample temperature probe is in communication connection with the signal input end of the temperature monitoring module, so that the real-time monitoring of the soil sample temperature is realized; the frost heaving displacement monitoring system is a laser instrument, a scale is attached to the outer surface of the visual heat insulation box, the laser instrument is used for recording the change of the top height of the soil sample at different moments, the frost heaving amount is converted, and the real-time monitoring of the frost heaving displacement of the soil sample is realized;
(E) if a unidirectional freezing simulation system test is carried out: arranging a top cover at the top end of the visual heat insulation box, wherein the top cover is an acrylic plate with the thickness of 5cm, and applying a sealing ring after the top cover is tightly attached to the top end of the visual heat insulation box;
set up the moisturizing system above the visual heat-insulating box: the water replenishing system comprises a Ma bottle and a water replenishing channel, a water outlet of the Ma bottle is in fluid communication with a water inlet of the water replenishing channel, and a ruler is pasted on the outer surface of the Ma bottle to record the amount of water replenishing; the water replenishing channel penetrates through the top cover to enter the visible heat insulation box and is communicated with the top of the soil sample; the water supplementing channel and the top cover are sealed through a rubber ring;
if a bidirectional freezing simulation system test is carried out: arranging a refrigerating plate at the top end of the visual heat insulation box, and directly applying the refrigerating plate on the top of the soil sample; the structure of refrigeration board with the refrigeration board of visual heat insulation box bottom is the same go up the top of refrigeration board and set up the heating panel, go up the heating panel the structure with the heating panel structure of visual heat insulation box bottom is the same, go up the clear water passageway of heating panel with clear water circulation system fluid switches on.
The technical scheme of the invention achieves the following beneficial technical effects:
1. the portable multifunctional small-sized freezing simulation test system provided by the invention can be simply erected in any scene, can be disassembled after test and can be repeatedly utilized, and has the advantages of simple assembly, low cost, multiple functions, stable performance, strong applicability and the like.
2. Although the test device is simple, the test device can provide multiple functions of cold source, heat insulation, temperature and displacement monitoring, water replenishing, automatic alarm and the like in single and two-way freezing processes, and can simulate parameters of soil layer temperature, frost heaving and thawing sinking, water migration and the like under single and two-way freezing conditions of groundwater replenishment in any scene.
Drawings
FIG. 1 is a schematic diagram of a unidirectional freeze simulation test system according to the present invention;
FIG. 2 is a schematic diagram of a bi-directional freezing simulation test system according to the present invention;
FIG. 3 is a flow chart of the freeze simulation test of the present invention.
The reference numbers in the figures denote: 1-a visible heat insulation box; 2-a refrigeration plate; 2-1-upper refrigerating plate; 3-a heat dissipation plate; 3-1-upper heat sink; 4-a temperature controller; 5-a clear water tank; 5-1-water outlet pipeline; 5-2-water inlet pipeline; 6-cold exhaust fan; 7-a small pump; 8-temperature alarm; 9-a soil sample temperature probe; 10-a temperature monitoring module; 11-a laser; 12-a top cover; 13-March flask.
Detailed Description
Example 1, one-way freeze simulation system.
As shown in figure 1, the single-row freezing simulation system comprises a visual heat insulation box 1, a refrigeration plate 2, a heat dissipation plate 3, a clear water circulation system, a monitoring system and a water replenishing system.
The bottom end of the visual heat insulation box 1 is tightly attached to the refrigerating plate 2 in a seamless manner, the heat dissipation plate 3 is positioned below the refrigerating plate 2, and a curved clear water channel is arranged inside the heat dissipation plate 3; the water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the heat dissipation plate 3, and the water outlet end of the clear water channel of the heat dissipation plate 3 is in fluid communication with the water inlet end of the clear water circulating system; the monitoring system comprises a temperature monitoring system and a frost heaving displacement monitoring system and is used for monitoring the temperature and the frost heaving displacement of the soil sample in the visual heat insulation box 1; the side wall surface of the soil sample is wrapped by a PVC pipe.
The visual heat insulation box 1 is made of double-layer acrylic plates and is 2-3cm thick; and after the two layers of acrylic plates are tightly attached, applying a sealing ring, and vacuumizing the middle to form the transparent visual strong acrylic plate heat insulation box. The inner diameter size of the visible heat insulation box 1 is required to be tightly attached to the cold plate without a gap.
The top end of the visual heat insulation box 1 is provided with a top cover 12, the top cover 12 is an acrylic plate with the thickness of 5cm, and the top cover 12 is tightly attached to the visual heat insulation box 1 and then sealed and insulated by using a rubber ring. The acrylic top cover 12 is also insulated by vacuum process, and is sealed with the visual heat insulation box 1 by a gasket.
A curve-shaped clear water channel is milled in the heat dissipation plate 3 and is divided into a left independent channel and a right independent channel so as to increase the heat dissipation efficiency of the refrigeration plate 2. The independent clear water channels on the left and right sides of the heat dissipation plate 3 are respectively communicated with the clear water circulating systems on the left and right sides.
The clear water circulating system comprises a clear water tank 5, a cold exhaust fan 6, a small pump 7 and a temperature alarm 8, wherein the water outlet end of the clear water tank 5 is communicated with the water inlet end of the clear water channel of the heat dissipation plate 3 through a water outlet pipeline 5-1, and the small pump 7 is arranged on the water outlet pipeline 5-1; the water inlet end of the clear water tank 5 is communicated with the water outlet end of the clear water channel of the heat dissipation plate 3 through a water inlet pipeline 5-2, and the cold exhaust fan 6 is arranged on the water inlet pipeline 5-2; and a temperature test probe of the temperature alarm 8 extends into the clear water tank 5, is in contact with clear water in the clear water tank 5 and is used for monitoring the temperature of the clear water. The cold air exhaust fan 6 reduces the temperature of the clean water flowing out of the clean water channel of the heat dissipation plate 3 in real time by using the air cooling principle. Wherein the temperature of the clear water in the clear water tank 5 reaches above 25 ℃, the temperature alarm 8 gives an alarm, and the clear water with low temperature needs to be replaced in time or ice crystals need to be put into the clear water tank immediately. The small pump 7 is typically 5W.
The water supplementing system is positioned above the top cover 12 and comprises a Ma bottle 13 and a water supplementing channel, a water outlet of the Ma bottle 13 is communicated with a water inlet of the water supplementing channel, and the water supplementing channel penetrates through the top cover 12, enters the visible heat insulation box 1 and is communicated with the top of a soil sample; the water replenishing channel and the top cover 12 are sealed through rubber rings. And (5) sticking a scale on the outer surface of the Ma bottle 13 and recording the water supplement amount.
Temperature monitoring system includes soil sample temperature probe 9 and temperature monitoring module 10, soil sample temperature probe 9 is even arranges in the soil sample along soil sample direction of height, soil sample temperature probe 9's signal output part with temperature monitoring module 10's signal input part communication connection utilizes temperature monitoring module 10 to realize the real-time supervision to soil sample temperature.
The frost heaving displacement monitoring system is a laser instrument 11, a scale is pasted on the outer surface of the visual heat insulation box 1, the initial height of the soil sample is determined by the laser instrument 11, the frost heaving amount is converted by recording the change of the top height of the soil sample at different moments by the laser instrument 11, and the real-time monitoring and conversion of the frost heaving displacement of the soil sample are realized.
The specific working principle is as follows:
A. the on-site actual soil sample collection is carried out, and the outer side wall surface of the soil sample is wrapped by the PVC pipe with the thickness of 5mm, so that the bearing capacity is improved. And place the soil sample in visual heat-insulating box 1, arrange soil sample temperature probe 9 along soil sample direction of height, soil sample temperature probe 9's wire passes visual heat-insulating box 1 lateral wall and temperature monitoring module 10 communication connection, and temperature monitoring module 10 can the temperature variation condition of real-time supervision soil sample.
B. The refrigerating plate 2 is connected with the temperature controller 4 through a lead, and the temperature of the refrigerating plate 2 is controlled and monitored. Utilize temperature controller 4 control refrigeration board 2's temperature, stop the power supply when refrigeration board 2 temperature is less than and set up minimum temperature, open the power when the cold plate temperature is higher than and set up minimum temperature, actively refrigerate.
C. The independent clear water channels on the left and right sides in the heat dissipation plate 3 are respectively communicated with the clear water circulating systems on the left and right sides for cooling the heat dissipation plate 3. The water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the heat dissipation plate 3, and the water outlet end of the clear water channel of the heat dissipation plate 3 is in fluid communication with the water inlet end of the clear water circulating system; the clear water circulating system comprises a clear water tank 5, a cold exhaust fan 6, a small pump 7 and a temperature alarm 8, wherein the water outlet end of the clear water tank 5 is communicated with the water inlet end of the clear water channel of the refrigerating plate 2 through a water outlet pipeline 5-1, and the small pump 7 is arranged on the water outlet pipeline 5-1; the water inlet end of the clear water tank 5 is communicated with the water outlet end of the clear water channel of the refrigeration plate 2 through a water inlet pipeline 5-2, and the cold exhaust fan 6 is arranged on the water inlet pipeline 5-2; and a temperature test probe of the temperature alarm 8 extends into the clear water tank 5, is in contact with clear water in the clear water tank 5 and is used for monitoring the temperature of the clear water. Wherein the temperature of the clear water in the clear water tank 5 reaches above 25 ℃, the temperature alarm 8 gives an alarm, and the clear water with low temperature needs to be replaced in time or ice crystals need to be put into the clear water tank immediately. The cold exhaust fan 6 is used for reducing the temperature of the clean water returned from the heat dissipation plate 3 to the clean water tank 5 in real time by utilizing the air cooling principle.
D. The outer surface of the visual heat insulation box 1 is pasted with a scale, the laser instrument 11 is utilized to record the change of the top height of the soil sample at different moments, the frost heaving amount is converted, and the real-time monitoring of the frost heaving displacement of the soil sample is realized.
E. The top end of the visual heat insulation box 1 is provided with a top cover 12, the top cover 12 is an acrylic plate with the thickness of 5cm, and a sealing ring is applied after the top cover 12 is tightly attached to the top end of the visual heat insulation box 1.
Set up water supply system in visual heat insulation box 1 top, water supply system includes mah-jong bottle 13 and moisturizing passageway, mah-jong bottle 13's delivery port switches on with the water inlet fluid of moisturizing passageway, mah-jong bottle 13's outer surface pastes the scale, the record moisturizing volume. The water replenishing channel penetrates through the top cover 12 to enter the visible heat insulation box 1 and is communicated with the top of the soil sample; the water replenishing channel and the top cover 12 are sealed through rubber rings.
The test process requires examination items: a. the degree of attachment of the temperature controller probe to the refrigeration plate 2; b. sealing and bending degree of the pipeline; c. the flow of the clear water outlet; d. the accuracy of the temperature alarm probe, etc. Ensure the normal operation of the system
Parameters such as soil layer temperature, frost heaving and thaw collapse, moisture migration and the like are monitored through the unidirectional freezing simulation system, and the development condition of the frozen wall can be comprehensively mastered.
Example 2, two-way freeze simulation system.
As shown in fig. 2, the difference from the embodiment unidirectional freezing membrane system is that: the bidirectional freezing simulation does not need to consider water supplement and frost heaving monitoring.
As shown in fig. 2, the single-row freezing simulation system comprises a visual heat insulation box 1, a refrigeration plate 2, a heat dissipation plate 3, a clear water circulation system and a monitoring system water-replenishing-free system.
The bottom end of the visual heat insulation box 1 is tightly attached to the refrigerating plate 2 in a seamless manner, the heat dissipation plate 3 is positioned below the refrigerating plate 2, and a curved clear water channel is arranged inside the heat dissipation plate 3; the water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the heat dissipation plate 3, and the water outlet end of the clear water channel of the heat dissipation plate 3 is in fluid communication with the water inlet end of the clear water circulating system; the monitoring system comprises a temperature monitoring system and a frost heaving displacement monitoring system and is used for monitoring the temperature and the frost heaving displacement of the soil sample in the visual heat insulation box 1; the side wall surface of the soil sample is wrapped by a PVC pipe.
The visual heat insulation box 1 is made of double-layer acrylic plates and is 2-3cm thick; and after the two layers of acrylic plates are tightly attached, applying a sealing ring, and vacuumizing the middle to form the transparent visual strong acrylic plate heat insulation box. The inner diameter size of the visible heat insulation box 1 is required to be tightly attached to the cold plate without a gap.
An upper refrigerating plate 2-1 is arranged at the top end of the visual heat insulation box 1, the structure of the upper refrigerating plate is the same as that of the refrigerating plate 2 at the bottom end of the visual heat insulation box 1, an upper heat dissipation plate 3-1 is arranged above the upper refrigerating plate 2-1, and the structure of the upper heat dissipation plate 3-1 is the same as that of the heat dissipation plate 3 at the bottom end of the visual heat insulation box 1.
A curve-shaped clear water channel is milled in the heat dissipation plate 3 and is divided into a left independent channel and a right independent channel so as to increase the heat dissipation efficiency of the refrigeration plate 2. The independent clear water channels on the left and right sides of the heat dissipation plate 3 are respectively communicated with the clear water circulating systems on the left and right sides.
The clear water circulating system comprises a clear water tank 5, a cold exhaust fan 6, a small pump 7 and a temperature alarm 8, wherein the water outlet end of the clear water tank 5 is communicated with the water inlet end of the clear water channel of the heat dissipation plate 3 through a water outlet pipeline 5-1, and the small pump 7 is arranged on the water outlet pipeline 5-1; the water inlet end of the clear water tank 5 is communicated with the water outlet end of the clear water channel of the heat dissipation plate 3 through a water inlet pipeline 5-2, and the cold exhaust fan 6 is arranged on the water inlet pipeline 5-2; and a temperature test probe of the temperature alarm 8 extends into the clear water tank 5, is in contact with clear water in the clear water tank 5 and is used for monitoring the temperature of the clear water. The cold air exhaust fan 6 reduces the temperature of the clean water flowing out of the clean water channel of the heat dissipation plate 3 in real time by using the air cooling principle. Wherein the temperature of the clear water in the clear water tank 5 reaches above 25 ℃, the temperature alarm 8 gives an alarm, and the clear water with low temperature needs to be replaced in time or ice crystals need to be put into the clear water tank immediately. The small pump 7 is typically 5W.
Temperature monitoring system includes soil sample temperature probe 9 and temperature monitoring module 10, soil sample temperature probe 9 is even arranges in the soil sample along soil sample direction of height, soil sample temperature probe 9's signal output part with temperature monitoring module 10's signal input part communication connection utilizes temperature monitoring module 10 to realize the real-time supervision to soil sample temperature. Non-frost heaving displacement monitoring system
The specific working principle is as follows:
A. the on-site actual soil sample collection is carried out, and the outer side wall surface of the soil sample is wrapped by the PVC pipe with the thickness of 5mm, so that the bearing capacity is improved. And place the soil sample in visual heat-insulating box 1, arrange soil sample temperature probe 9 along soil sample direction of height, soil sample temperature probe 9's wire passes visual heat-insulating box 1 lateral wall and temperature monitoring module 10 communication connection, and temperature monitoring module 10 can the temperature variation condition of real-time supervision soil sample.
B. The bottom end and the top end of the visual heat insulation box 1 are respectively provided with a refrigeration plate 2 and an upper refrigeration plate 2-1, and the refrigeration plate 2/the upper refrigeration plate 2-1 are connected with a temperature controller 4 through a lead to control and monitor the temperature of the refrigeration plate 2. Utilize temperature controller 4 control refrigeration board 2's temperature, stop the power supply when refrigeration board 2 temperature is less than and set up minimum temperature, open the power when the cold plate temperature is higher than and set up minimum temperature, actively refrigerate. The upper refrigerating plate 2-1 is directly applied to the top of the soil sample.
C. The heat dissipation plate 3 is arranged below the refrigerating plate 2, and the upper heat dissipation plate 3-1 is arranged above the upper refrigerating plate 2-1.
The independent clear water channels on the left side and the right side in the heat dissipation plate 3 and the upper heat dissipation plate 3-1 are respectively communicated with the clear water circulating systems on the left side and the right side for cooling the heat dissipation plate 3.
The water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the heat dissipation plate 3, and the water outlet end of the clear water channel of the heat dissipation plate 3/the upper heat dissipation plate 3-1 is in fluid communication with the water inlet end of the clear water circulating system; the clear water circulating system comprises a clear water tank 5, a cold exhaust fan 6, a small pump 7 and a temperature alarm 8, wherein the water outlet end of the clear water tank 5 is communicated with the water inlet end of the clear water channel of the refrigerating plate 2 through a water outlet pipeline 5-1, and the small pump 7 is arranged on the water outlet pipeline 5-1; the water inlet end of the clear water tank 5 is communicated with the water outlet end of the clear water channel of the refrigeration plate 2 through a water inlet pipeline 5-2, and the cold exhaust fan 6 is arranged on the water inlet pipeline 5-2; and a temperature test probe of the temperature alarm 8 extends into the clear water tank 5, is in contact with clear water in the clear water tank 5 and is used for monitoring the temperature of the clear water. Wherein the temperature of the clear water in the clear water tank 5 reaches above 25 ℃, the temperature alarm 8 gives an alarm, and the clear water with low temperature needs to be replaced in time or ice crystals need to be put into the clear water tank immediately. The cold exhaust fan 6 is used for reducing the temperature of the clean water returned from the heat dissipation plate 3 to the clean water tank 5 in real time by utilizing the air cooling principle.
The structure of the upper refrigerating plate 2-1 and the upper heat dissipation plate 3-1 arranged at the top end of the visual heat insulation box 1 is the same as the structure of the refrigerating plate 2 and the heat dissipation plate 3 at the bottom end of the visual heat insulation box 1. The clear water channel in the heat dissipation plate 3 and the upper heat dissipation plate 3-1 is divided into a left independent channel and a right independent channel, and the independent clear water channels are respectively communicated with the clear water circulating system.
Namely, the left and right independent clear water channels of the upper heat dissipation plate 3-1 are respectively communicated with the clear water circulating system, namely, four groups of clear water circulating systems are arranged in the bidirectional freezing simulation system, and the structure of the clear water circulating system is the same as that of the clear water circulating system in the embodiment 1.
The soil layer temperature is monitored through the bidirectional freezing simulation system, the unfreezing distance of the frozen wall is monitored by using the temperature, and the development condition of the frozen wall can be comprehensively mastered.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (10)
1. A portable multifunctional small-sized freezing simulation test system is characterized by comprising a visual heat insulation box (1), a refrigeration plate (2), a heat dissipation plate (3), a clear water circulating system and a monitoring system,
the bottom end of the visual heat insulation box (1) is in seamless close fit with the refrigeration plate (2), the heat dissipation plate (3) is positioned below the refrigeration plate (2), and a curved clear water channel is arranged inside the heat dissipation plate (3); the water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the heat dissipation plate (3), and the water outlet end of the clear water channel of the heat dissipation plate (3) is in fluid communication with the water inlet end of the clear water circulating system; the monitoring system comprises a temperature monitoring system and a frost heaving displacement monitoring system and is used for monitoring the temperature change and frost heaving displacement of the soil sample in the visual heat insulation box (1); the side wall surface of the soil sample is wrapped by a PVC pipe.
2. A portable multifunctional small-sized freezing simulation test system according to claim 1, characterized in that 6-8 refrigerating sheets are arranged on the refrigerating plate (2), the refrigerating plate (2) is connected with a temperature controller (4), and the temperature of the refrigerating plate (2) is controlled by the temperature controller (4); the clear water channel in the heat dissipation plate (3) is divided into a left independent channel and a right independent channel, and the independent clear water channels are respectively communicated with the clear water circulating system.
3. The portable multifunctional small-sized freezing simulation test system according to claim 1, wherein the clean water circulating system comprises a clean water tank (5), a cold exhaust fan (6), a small-sized pump (7) and a temperature alarm (8), the water outlet end of the clean water tank (5) is in fluid communication with the water inlet end of the clean water channel of the heat dissipation plate (3) through a water outlet pipeline (5-1), and the small-sized pump (7) is arranged on the water outlet pipeline (5-1); the water inlet end of the clear water tank (5) is communicated with the fluid at the water outlet end of the clear water channel of the heat dissipation plate (3) through a water inlet pipeline (5-2), and the cold exhaust fan (6) is arranged on the water inlet pipeline (5-2); and a temperature test probe of the temperature alarm (8) extends into the clear water tank (5) and is in contact with clear water in the clear water tank (5) for monitoring the temperature of the clear water.
4. The portable multifunctional small-sized freezing simulation test system according to claim 1, wherein the temperature monitoring system comprises a soil sample temperature probe (9) and a temperature monitoring module (10), the soil sample temperature probe (9) is uniformly arranged in the soil sample along the height direction of the soil sample, and the signal output end of the soil sample temperature probe (9) is in communication connection with the signal input end of the temperature monitoring module (10) to realize real-time monitoring of the temperature of the soil sample.
5. The portable multifunctional small-sized freezing simulation test system according to claim 1, wherein the frost heaving displacement monitoring system is a laser instrument (11), a ruler is attached to the outer surface of the visual heat insulation box (1), the laser instrument (11) is used for recording the change of the top height of the soil sample at different moments, and the frost heaving amount is converted, so that the real-time monitoring of the frost heaving displacement of the soil sample is realized.
6. The portable multifunctional small-sized freezing simulation test system according to claim 1, wherein the visual heat insulation box (1) is made of double-layer acrylic plate material and has a thickness of 2-3 cm; and after the two layers of acrylic plates are tightly attached, applying a sealing ring and vacuumizing the middle.
7. A portable multifunctional small-sized freezing simulation test system according to any one of claims 1 to 6, wherein if one-way freezing simulation is performed, a top cover (12) is arranged at the top end of the visual heat insulation box (1), the top cover (12) is an acrylic plate with the thickness of 5cm, and a sealing ring is applied after the top cover (12) is tightly attached to the top end of the visual heat insulation box (1).
8. The portable multifunctional small-sized freezing simulation test system according to claim 6, wherein a water supplementing system is further required to be arranged if unidirectional freezing simulation is carried out; the water supplementing system comprises a March bottle (13) and a water supplementing channel, a water outlet of the March bottle (13) is communicated with a water inlet of the water supplementing channel in a fluid mode, and a ruler is pasted on the outer surface of the March bottle (13) to record the water supplementing quantity; the water replenishing channel penetrates through the top cover (12) to enter the visible heat insulation box (1) and is inserted into the top of the soil sample; the water supplementing channel and the top cover (12) are sealed through a rubber ring.
9. A portable multifunctional small-sized freezing simulation test system according to any one of claims 1-6, characterized in that if a bidirectional freezing simulation is performed, an upper refrigerating plate (2-1) is arranged at the top end of the visual heat insulation box (1), the structure of the upper refrigerating plate is the same as that of the refrigerating plate (2) at the bottom end of the visual heat insulation box (1), an upper heat dissipation plate (3-1) is arranged above the upper refrigerating plate (2-1), and the structure of the upper heat dissipation plate (3-1) is the same as that of the heat dissipation plate (3) at the bottom end of the visual heat insulation box (1).
10. A portable multifunctional mini-freezing simulation method, wherein the portable multifunctional mini-freezing simulation test system of any one of claims 1 to 9 is used for freezing simulation; the method specifically comprises the following steps:
(A) actually collecting a soil sample on site, wrapping the outer side wall surface of the soil sample with a PVC pipe for assembly, placing the soil sample in a visible heat insulation box (1), and uniformly arranging soil sample temperature probes (9) along the height direction of the soil sample;
(B) the bottom end of the visual heat insulation box (1) is provided with a refrigeration plate (2), the refrigeration plate (2) is connected with a temperature controller (4) through a lead, and the temperature of the refrigeration plate (2) is controlled and monitored;
(C) the clear water channel of the heat dissipation plate (3) is communicated with the clear water circulating system; the water outlet end of the clear water circulating system is in fluid communication with the water inlet end of the clear water channel of the heat dissipation plate (3), and the water outlet end of the clear water channel of the heat dissipation plate (3) is in fluid communication with the water inlet end of the clear water circulating system; the clear water circulating system comprises a clear water tank (5), a cold exhaust fan (6), a small pump (7) and a temperature alarm (8), wherein the water outlet end of the clear water tank (5) is communicated with the fluid at the water inlet end of the clear water channel of the refrigeration plate (2) through a water outlet pipeline (5-1), and the small pump (7) is arranged on the water outlet pipeline (5-1); the water inlet end of the clear water tank (5) is communicated with the fluid at the water outlet end of the clear water channel of the refrigeration plate (2) through a water inlet pipeline (5-2), and the cold exhaust fan (6) is arranged on the water inlet pipeline (5-2); a temperature test probe of the temperature alarm (8) extends into the clear water tank (5) and is in contact with clear water in the clear water tank (5) for monitoring the temperature of the clear water;
(D) setting a monitoring system: the temperature monitoring system comprises a soil sample temperature probe (9) and a temperature monitoring module (10); the signal output end of the soil sample temperature probe (9) is in communication connection with the signal input end of the temperature monitoring module (10), so that the real-time monitoring of the soil sample temperature is realized; the frost heaving displacement monitoring system is a laser instrument (11), a scale is attached to the outer surface of the visual heat insulation box (1), the laser instrument (11) is utilized to record the change of the top height of the soil sample at different moments, the frost heaving amount is converted, and the real-time monitoring of the frost heaving displacement of the soil sample is realized;
(E) if a unidirectional freezing simulation system test is carried out: arranging a top cover (12) at the top end of the visual heat insulation box (1), wherein the top cover (12) is an acrylic plate with the thickness of 5cm, and after the top cover (12) is tightly attached to the top end of the visual heat insulation box (1), a sealing ring is applied;
set up the moisturizing system above visual heat-insulating box (1): the water supplementing system comprises a March bottle (13) and a water supplementing channel, a water outlet of the March bottle (13) is communicated with a water inlet of the water supplementing channel in a fluid mode, and a ruler is pasted on the outer surface of the March bottle (13) to record the water supplementing quantity; the water replenishing channel penetrates through the top cover (12) to enter the visible heat insulation box (1) and is communicated with the top of the soil sample; the water supplementing channel and the top cover (12) are sealed through a rubber ring;
if a bidirectional freezing simulation system test is carried out: an upper refrigerating plate (2-1) is arranged at the top end of the visual heat insulation box (1), and the refrigerating plate (2-1) is directly applied to the top of the soil sample; the structure of the refrigeration plate (2-1) is the same as that of the refrigeration plate (2) at the bottom end of the visual heat insulation box (1), an upper heat dissipation plate (3-1) is arranged above the upper refrigeration plate (2-1), the structure of the upper heat dissipation plate (3-1) is the same as that of the heat dissipation plate (3) at the bottom end of the visual heat insulation box (1), and a clear water channel of the upper heat dissipation plate (3-1) is communicated with the clear water circulating system.
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