High-automation road soil foundation freezing and thawing cycle test device

Abstract

The utility model relates to the technical field of highway subgrade soil tests, and discloses a high-automation highway soil base freezing and thawing cycle test device which comprises a test box body, a test box cabinet door arranged on the front surface of the test box body, pulleys arranged on the lower surface of the test box body, a temperature and humidity monitor arranged on the left surface of the test box body, and a temperature and humidity sensor arranged on the right surface of the test box body. And the simulation experiment mechanism is arranged in the test box body, the simulation experiment mechanism is used for carrying out a freeze-thaw cycle simulation experiment on the road soil foundation, and the simulation experiment mechanism comprises an infrared heating lamp. According to the high-automation road soil foundation freeze-thaw cycle test device, the raining effect of the nature can be simulated through the spraying pipe gallery; the infrared heating lamp is used for simulating the irradiation heating process of the sun on the road soil matrix in nature, and cold air produced by the refrigerating machine is used for simulating the refrigerating effect that cold air in nature is blown to the surface of the road soil matrix, so that the experiment is similar to the natural environment, and the authenticity of the soil matrix freezing and thawing cycle test is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of highway subgrade soil tests, and particularly relates to a highly automated highway subgrade freeze-thaw cycle test device. Background Art

[0002] For linear structures such as highways and railways in seasonal freezing regions, the subgrade or foundation soil freezes and thaws with the alternation of winter and summer cold and warm. This phenomenon is called freeze-thaw cycle. A series of freeze-thaw effects deteriorate the resilient modulus of highway subgrade soil, increase the additional bending tensile stress at the bottom of the subbase of the pavement structure, and cause excessive plastic deformation of the subgrade under the action of vehicle loads, thus leading to premature fatigue failure of the subbase and reducing the service life of the highway pavement.

[0003] However, in the existing devices, the samples are directly affected. For example, water is directly injected into the highway subgrade soil, and after injection, the interior of the highway subgrade soil is heated or the highway subgrade soil is directly stored in a freezing device for freeze-thaw cycle. Due to the too strong determination of measurement, the actual situation cannot be truly reflected, resulting in a deviation between actual use and experiment. In view of this, a highly automated highway subgrade freeze-thaw cycle test device is proposed. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the existing technology, the utility model provides a highly automated highway subgrade freeze-thaw cycle test device, which solves the problem of deviation in the freeze-thaw cycle test.

[0006] (2) Technical Solutions

[0007] To achieve the purpose of simulating the natural environment for freeze-thaw cycle test, the utility model provides the following technical solutions: A highly automated highway subgrade freeze-thaw cycle test device includes a test chamber body, a test chamber cabinet door is arranged on the front surface of the test chamber body, a pulley is arranged on the lower surface of the test chamber body, and a temperature and humidity monitor is arranged on the left surface of the test chamber body;

[0008] A simulation experiment mechanism is arranged in the test chamber body. The simulation experiment mechanism is used for simulating freeze-thaw cycle experiments on highway subgrade soil. The simulation experiment mechanism includes an infrared heating lamp, and the infrared heating lamp is fixedly installed on the lower surface of the top plate of the test chamber body.

[0009] Preferably, the simulation experiment mechanism further includes a semiconductor refrigeration sheet, a cold conduction sheet, a cold conduction fan and a heat dissipation fan. The semiconductor refrigeration sheet is fixedly installed in the inner wall of the right vertical plate of the test chamber body, the cold conduction sheet is fixedly installed on the left surface of the semiconductor refrigeration sheet, the cold conduction fan is fixedly installed on the left surface of the cold conduction sheet, and the heat dissipation fan is fixedly installed on the right surface of the semiconductor refrigeration sheet.

[0010] Preferably, a test box is arranged in the inner wall of the test chamber body, and diversion holes are formed in the bottom wall of the test box.

[0011] Preferably, the simulation experiment device further comprises a diversion plate and a storage box. The diversion plate is fixedly installed on the lower surface of the test box, the storage box is fixedly installed on the lower surface of the test chamber body, and the storage box communicates with the diversion plate.

[0012] Preferably, the simulation experiment device further comprises a water storage tank and two water delivery pipes. The water storage tank is fixedly installed on the right surface of the test chamber body, and the two water delivery pipes are arranged on the upper surface of the water storage tank.

[0013] Preferably, the simulation experiment device further comprises two water pumps and two spray pipe galleries. The two water pumps are arranged on the outer surfaces of the two water delivery pipes, the two spray pipe galleries are arranged in the inner wall of the test chamber body, and the two spray pipe galleries communicate with the two water delivery pipes.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a highly automated highway subgrade freeze-thaw cycle test device, which has the following beneficial effects:

[0016] 1. The highly automated highway subgrade freeze-thaw cycle test device can imitate the rain effect in nature through the spray pipe gallery, imitate the heating process of the sun shining on the highway subgrade in nature with an infrared heating lamp, and use the cold air produced by the refrigerator to imitate the refrigeration effect of the cold air in nature blowing to the surface of the highway subgrade, making the experiment similar to the natural environment and improving the authenticity of the subgrade freeze-thaw cycle test.

[0017] 2. The highly automated highway subgrade freeze-thaw cycle test device can observe the loss of muddy water through the diversion holes formed in the bottom plate of the test box and the diversion plate arranged on the lower surface, and is used to measure the soil and water loss of the highway subgrade, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a highly automated highway subgrade freeze-thaw cycle test device of the utility model;

[0019] Figure 2 is a left view of the structure of the test chamber body of the utility model;

[0020] Figure 3 is a schematic diagram of the internal structure of the test chamber body of the utility model;

[0021] Figure 4 is a right view of the structure of the test chamber body of the utility model.

[0022] In the figure: 1. Test chamber body; 2. Test chamber cabinet door; 3. Pulley; 4. Temperature and humidity monitor; 5. Infrared heating lamp; 6. Test box; 7. Deflector; 8. Semiconductor refrigeration sheet; 9. Cold conduction sheet; 10. Cold conduction fan; 11. Heat dissipation fan; 12. Water storage tank; 13. Water pump; 14. Water pipe; 15. Sprinkler pipe gallery; 16. Flow guiding hole; 17. Storage box. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-4 , the present invention provides a new technical solution: a highly automated highway subgrade freeze-thaw cycle test device, which includes a test chamber body 1, a test chamber cabinet door 2 is arranged on the front surface of the test chamber body 1, a pulley 3 is arranged on the lower surface of the test chamber body 1, and a temperature and humidity monitor 4 is arranged on the left surface of the test chamber body 1;

[0025] A simulation experiment mechanism is arranged in the test chamber body 1 and is used to conduct a freeze-thaw cycle simulation experiment on the highway subgrade. The simulation experiment mechanism includes an infrared heating lamp 5, and the infrared heating lamp 5 is fixedly installed on the lower surface of the top plate of the test chamber body 1.

[0026] Furthermore, the simulation experiment mechanism further includes a semiconductor refrigeration sheet 8, a cold conduction sheet 9, a cold conduction fan 10 and a heat dissipation fan 11. The semiconductor refrigeration sheet 8 is fixedly installed in the inner wall of the right vertical plate of the test chamber body 1, the cold conduction sheet 9 is fixedly installed on the left surface of the semiconductor refrigeration sheet 8, the cold conduction fan 10 is fixedly installed on the left surface of the cold conduction sheet 9, and the heat dissipation fan 11 is fixedly installed on the right surface of the semiconductor refrigeration sheet 8.

[0027] Furthermore, a test box 6 is arranged in the inner wall of the test chamber body 1, and a flow guiding hole 16 is opened on the bottom wall of the test box 6.

[0028] Furthermore, the simulation experiment device further includes a deflector 7 and a storage box 17. The deflector 7 is fixedly installed on the lower surface of the test box 6, the storage box 17 is fixedly installed on the lower surface of the test chamber body 1, and the storage box 17 communicates with the deflector 7.

[0029] Furthermore, the simulation experiment device further includes a water storage tank 12 and two water pipes 14. The water storage tank 12 is fixedly installed on the right surface of the test chamber body 1, and the two water pipes 14 are arranged on the upper surface of the water storage tank 12.

[0030] Furthermore, the simulation experiment device further includes two water pumps 13 and two spray pipe galleries 15. The two water pumps 13 are arranged on the outer surfaces of the two water pipes 14, and the two spray pipe galleries 15 are arranged in the inner wall of the test chamber body 1, and the two spray pipe galleries 15 communicate with the two water pipes 14;

[0031] When the high-automation highway subgrade freeze-thaw cycle test device is in use, highway subgrade is placed in the test box 6. At this time, the temperature and humidity inside the test chamber body 1 are obtained by observing the temperature and humidity monitor 4 arranged on the left surface of the test chamber body 1. When the temperature is too high, the semiconductor refrigeration sheet 8 is connected to an external power supply, and at this time the semiconductor refrigerates. The cold air produced is transmitted through the heat conduction sheet 9, and the cold air is transmitted into the test chamber body 1 through the cold air fan 10 for cooling treatment to simulate the cold air effect in nature. When the temperature inside the test chamber body 1 is too low, at this time the infrared heating lamp 5 is connected to an external power supply, and the highway subgrade is heated by the irradiation of the infrared heating lamp 5 to simulate the lighting effect of the sun on the highway subgrade in nature. By starting the water pump 13, the water pump 13 operates to form a negative pressure effect in the water pipe 14. At this time, the water in the water storage tank 12 enters the spray pipe gallery 15 through the water pipe 14 and sprays the highway subgrade in the test box 6 to simulate the rainfall effect in nature. At this time, the muddy water flowing from the diversion holes 16 and the diversion plate 7 into the storage box 17 of the highway subgrade can be observed to observe the viscosity between the soils after freeze-thaw cycle, so as to obtain the threshold value of soil and water loss;

[0032] The high-automation highway subgrade freeze-thaw cycle test device can imitate the rainfall effect in nature through the spray pipe gallery, imitate the heating process of the sun shining on the highway subgrade in nature with the infrared heating lamp, and use the cold air produced by the refrigerator to imitate the refrigeration effect of the cold air in nature blowing on the surface of the highway subgrade, making the experiment similar to the natural environment and improving the authenticity of the subgrade freeze-thaw cycle test. Moreover, the high-automation highway subgrade freeze-thaw cycle test device can observe the situation of muddy water loss through the diversion holes opened on the bottom plate of the test box and the diversion plate arranged on the lower surface, and is used to measure the soil and water loss of the highway subgrade, which is more convenient.

[0033] Working principle: When the highly automated highway subgrade freeze-thaw cycle test device is in use, highway subgrade is placed in the test box 6. At this time, the temperature and humidity inside the test chamber body 1 are obtained by observing the temperature and humidity monitor 4 arranged on the left surface of the test chamber body 1. When the temperature is too high, the semiconductor refrigeration sheet 8 is connected to an external power supply. At this time, the semiconductor refrigerates, and the produced cold air is transmitted through the heat conduction sheet 9, and the cold air is transmitted into the test chamber body 1 through the cold air fan 10 for cooling treatment to simulate the cold air effect in nature. When the temperature inside the test chamber body 1 is too low, at this time, the infrared heating lamp 5 is connected to an external power supply, and the highway subgrade is heated by irradiating the highway subgrade with the infrared heating lamp 5 to simulate the lighting effect of the sun on the highway subgrade in nature. By starting the water pump 13, the water pump 13 operates to form a negative pressure effect in the water delivery pipe 14. At this time, the water in the water storage tank 12 enters the spray pipe gallery 15 through the water delivery pipe 14 to spray the highway subgrade in the test box 6 to simulate the rainfall effect in nature. At this time, the muddy water flowing from the diversion holes 16 and the diversion plate 7 into the storage box 17 of the highway subgrade can be observed to observe the viscosity between the soils after freeze-thaw cycles, so as to obtain the threshold value of soil erosion.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A highly automated test device for freeze-thaw cycles of highway subgrade soil, comprising a test chamber body (1), a test chamber cabinet door (2) is arranged on the front surface of the test chamber body (1), and pulleys (3) are arranged on the lower surface of the test chamber body (1), characterized in that: A temperature and humidity monitor (4) is provided on the left surface of the test chamber body (1); A simulation experiment mechanism is arranged inside the test chamber body (1). The simulation experiment mechanism is used to conduct freeze-thaw cycle simulation experiments on highway subgrades. The simulation experiment mechanism includes an infrared heating lamp (5), and the infrared heating lamp (5) is fixedly installed on the lower surface of the top plate of the test chamber body (1).

2. The high-automation highway subgrade freeze-thaw cycle test device according to claim 1, wherein: The simulation experiment mechanism further includes a semiconductor refrigeration sheet (8), a cold conduction sheet (9), a cold conduction fan (10), and a heat dissipation fan (11). The semiconductor refrigeration sheet (8) is fixedly installed in the inner wall of the right vertical plate of the test chamber body (1). The cold conduction sheet (9) is fixedly installed on the left surface of the semiconductor refrigeration sheet (8). The cold conduction fan (10) is fixedly installed on the left surface of the cold conduction sheet (9). The heat dissipation fan (11) is fixedly installed on the right surface of the semiconductor refrigeration sheet (8).

3. A highly automated test device for freeze-thaw cycles of highway subgrade according to claim 1, characterized in that: A test box (6) is arranged in the inner wall of the test chamber body (1), and a diversion hole (16) is formed in the bottom wall of the test box (6).

4. The high-automation highway subgrade freeze-thaw cycle test device according to claim 3, wherein: The simulation experiment device further includes a diversion plate (7) and a storage box (17). The diversion plate (7) is fixedly installed on the lower surface of the test box (6). The storage box (17) is fixedly installed on the lower surface of the test chamber body (1), and the storage box (17) communicates with the diversion plate (7).

5. A highly automated highway subgrade freeze-thaw cycle test device according to claim 1, characterized in that: The simulation experiment device further includes a water storage tank (12) and two water delivery pipes (14). The water storage tank (12) is fixedly installed on the right surface of the test chamber body (1). The two water delivery pipes (14) are arranged on the upper surface of the water storage tank (12).

6. The high-automation highway subgrade freeze-thaw cycle test device according to claim 5, characterized in that: The simulation experiment device further includes two water pumps (13) and two spray pipe galleries (15). The two water pumps (13) are arranged on the outer surfaces of the two water delivery pipes (14). The two spray pipe galleries (15) are arranged in the inner wall of the test chamber body (1), and the two spray pipe galleries (15) communicate with the two water delivery pipes (14).

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