Freeze-thaw slope water migration testing device and testing method

Abstract

The invention discloses a freeze-thaw slope moisture migration testing device and a testing method. The water migration testing device comprises a freezing and thawing box used for containing a side slope model, a cover plate detachably covering an opening in the top of the freezing and thawing box, a sensing device arranged in the freezing and thawing box and used for sensing the temperature and humidity of the side slope model, and a circulating device used for providing simulated rainwater into the freezing and thawing box and recycling the simulated rainwater in the freezing and thawing box. The rainfall simulation device is arranged below the cover plate and is used for spraying simulated rainwater to the slope model; the heating device is used for heating the simulated rainwater and air in the freezing and thawing box; the cooling device is used for cooling the simulated rainwater and the air in the freezing and thawing box; according to the invention, the moisture migration process of the slope model under the freeze-thaw cycle can be simulated more truly.

Description

Technical Field

[0001] The invention relates to the technical field of cold region geological engineering, and in particular to a freeze-thaw slope moisture migration testing device and a testing method. Background Art

[0002] In the context of the current global climate change, the freeze-thaw cycle phenomenon has gradually attracted the attention of researchers, especially in terms of slope stability and soil moisture migration. The freeze-thaw cycle refers to the repeated freezing and melting of water in the soil under the influence of temperature changes. This process can significantly change the physical properties and mechanical behavior of the soil, thereby affecting the stability of the slope.

[0003] Slopes are a common terrain feature in nature. Their stability is not only related to the safety of the natural environment, but also directly affects the safety of engineering construction, transportation and human living environment. Therefore, studying the behavior of slopes under freeze-thaw cycles, especially the mechanism of water migration, has important theoretical significance and practical application value.

[0004] Most of the existing freeze-thaw slope moisture migration test devices only focus on the temperature control of the slope model, and do not control the temperature of the simulated rainwater, which will directly affect the freeze-thaw depth, soil temperature change rate, freeze-thaw cycle frequency and slope stability of the slope model. In addition, the unevenness of rainfall simulation also significantly affects the slope temperature change of the slope freeze-thaw model, and the existing freeze-thaw models have not yet solved this problem well.

[0005] Therefore, in order to better test the slopes and observe the moisture migration of different soils under freeze-thaw cycles, we proposed a freeze-thaw slope moisture migration test device. By establishing a test model, we simulated the migration process of soil moisture under freeze-thaw cycles, so as to better evaluate the stability of different slopes. Summary of the invention

[0006] The purpose of the present invention is to provide a freeze-thaw slope moisture migration test device to address the technical defects in the prior art; Another object of the present invention is to provide a testing method based on the freeze-thaw slope moisture migration testing device.

[0007] The technical solution adopted to achieve the purpose of the present invention is: A freeze-thaw slope moisture migration test device comprises a freeze-thaw box for accommodating a slope model, a cover plate detachably covering the top opening of the freeze-thaw box, a sensor device arranged inside the freeze-thaw box for sensing the temperature and humidity of the slope model, a circulation device for providing simulated rainwater into the freeze-thaw box and recovering the simulated rainwater in the freeze-thaw box, a rainfall simulation device arranged below the cover plate for spraying simulated rainwater onto the slope model, a heating device for heating the simulated rainwater and the air inside the freeze-thaw box, and a cooling device for cooling the simulated rainwater and the air inside the freeze-thaw box, wherein: The circulation device comprises a circulating water tank arranged at the outer bottom of the freeze-thaw box, a water inlet connected to the circulating water tank is arranged at the top of the circulating water tank, a water level meter is fixedly arranged on one side of the inner wall of the circulating water tank, a water pump is arranged at the top of the circulating water tank, a pipeline connected to the water inlet of the water pump extends to the bottom of the circulating water tank, an opening is arranged on the circulating water tank to recover the simulated rainwater discharged from the bottom of the freeze-thaw box, and a filter is arranged at the opening; The rainfall simulation device comprises a plurality of simulation tubes arranged below the cover plate, each simulation tube has a spray port evenly arranged below, a driven gear is coaxially fixed to the outer side of the end of each simulation tube, both ends of each simulation tube are rotatably connected to the bottom of the cover plate, the driven gear is connected to the driving gear through a transmission belt, the driving gear is driven by a simulation motor, one end of the simulation tube is sealed, and the other end is open and connected to the connecting pipe through a rotating sealing joint, the connecting pipe is connected to the water supply pipe through a telescopic hose, and the water supply pipe is connected to the water outlet of the water pump; The sensor device, the analog motor, the water level meter, the water pump, the heating device and the cooling device are electrically connected to the power supply and are communicatively connected to the computer.

[0008] In the above technical solution, a fixing plate is fixed to one side of the cover plate, the fixing plate is fixedly connected to the positioning plate, and the simulation motor is fixed on the positioning plate.

[0009] In the above technical solution, a connecting tube is provided between the freeze-thaw box and the computer, and the communication line and the electric wire are arranged in the connecting tube.

[0010] In the above technical solution, handles are symmetrically installed above the cover plate.

[0011] In the above technical solution, an insulation layer is provided on the outside of the freeze-thaw box.

[0012] In the above technical solution, temperature sensors are fixedly installed on the tops of the inner walls on both sides of the freeze-thaw box, the temperature sensors are electrically connected to the power supply, and the temperature sensors are communicatively connected to the computer.

[0013] In the above technical solution, the cooling device includes a condenser fixedly installed on one side of the outside of the freeze-thaw box, the condenser is electrically connected to the power supply, the condenser is communicatively connected to the computer, one or more condensing tubes are evenly installed under the condenser, and the end of each condensing tube extends into the circulating water tank. A cold air outlet is opened on one side of the condenser, and the cold air outlet is communicated with the inside of the freeze-thaw box.

[0014] In the above technical solution, the temperature increasing device includes a heater fixedly mounted on one side of the outside of the freeze-thaw box, the heater is electrically connected to a power source, the heater is communicatively connected to a computer, one or more heating tubes are fixedly mounted below the heater, the end of each heating tube extends into a circulating water tank, a hot air outlet is provided on one side of the heater, and the hot air outlet is communicated with the inside of the freeze-thaw box.

[0015] In the above technical solution, a fixing plate is fixed to one side of the cover plate, the fixing plate is fixedly connected to the positioning plate, and the simulation motor is fixed on the positioning plate.

[0016] Another aspect of the present invention also includes a test method for the freeze-thaw slope moisture migration test device, comprising the following steps: Open the cover, place the frozen slope model in the freeze-thaw box, and adjust the slope angle of the slope model according to the needs, and close the cover; when the cover is opened, the telescopic hose extends, and when the cover is closed, the telescopic hose contracts; The simulated rainwater is injected into the circulating water tank through the water injection port, the water level is monitored by the water level meter, and the monitoring data is transmitted to the computer. When the water level exceeds the predetermined threshold, the computer controls the operation of the water pump, and the water pump transports the simulated rainwater in the circulating water tank to the simulation pipe through the water supply pipe and the telescopic hose, and sprays the water on the surface of the slope model through the spray port under the simulation pipe; When the water pump is started, the simulation motor is started at the same time, and the simulation motor drives the driving gear to repeatedly rotate forward and reverse at a fixed angle. The driving gear drives the driven gear to rotate synchronously through the transmission belt, and the driven gear drives the simulation tube to rotate synchronously. The simulation tube rotates forward and reverse at a fixed angle during the spraying process, so that the simulated rainwater can be more evenly distributed on the surface of the slope model, avoiding the problem of deviation in the simulation result caused by the simulated rainwater spraying downward at a fixed position; the simulated rainwater that penetrates the slope model is filtered through the filter net and circulated back to the circulating water tank; During the simulated rainwater circulation process, the cooling device is started to cool the simulated rainwater and the air inside the freeze-thaw box to simulate a cold day; the heating device is started to heat the simulated rainwater and the air inside the freeze-thaw box to simulate a hot day; During the simulation experiment, the sensor device monitors the temperature and humidity of the slope model in real time and transmits the signal to the computer, which performs moisture migration analysis based on the temperature and humidity.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In the process of spraying simulated rainwater, the simulation tube of the rainfall simulation device of the present invention swings left and right to ensure that the water is evenly distributed to different parts of the slope model, and the rainfall scene is simulated more realistically. The humidity is adjusted, and the heating device and the cooling device can adjust the temperature in the freeze-thaw box, so that the device can observe the water migration of the slope under repeated freeze-thaw and different temperatures; 2. During the water migration process of the slope model, the final simulated rainwater will return to the circulating water tank through the filter net, completing the recycling of water; 3. The heating device and the cooling device can adjust the temperature of the simulated rainwater and the slope model at the same time. Together with the uniform distribution of the simulated rainwater, the two work together to avoid the adverse effects of simulated rainwater temperature deviation and uneven rainwater distribution on the simulated slope, and can simulate the slope moisture migration process closer to reality.

[0018] 4. The present invention solves the problem that the prior art cannot consider the influence of freeze-thaw cycles on the internal water migration of rock and soil media in slope engineering, and realizes that water can be evenly distributed to different parts of the slope model, which is suitable for indoor simulation of the water migration process during freeze-thaw of slopes in cold regions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the front view of the freeze-thaw slope moisture migration test device.

[0020] Figure 2 Rear view of the freeze-thaw slope moisture migration test device.

[0021] Figure 3 This is a cross-sectional plan view of the freeze-thaw slope moisture migration test device.

[0022] Figure 4 It is a schematic diagram of the structure of the cover plate and the rainfall simulation device.

[0023] Figure 5 This is the front view of the internal structure of the freeze-thaw chamber.

[0024] Figure 6 This is the rear view of the internal structure of the freeze-thaw chamber.

[0025] Figure 7 Front view of the unfolded structure of the freeze-thaw slope moisture migration test device.

[0026] Figure 8 Rear view of the unfolded structure of the freeze-thaw slope moisture migration test device.

[0027] Fig. 9 It is a schematic diagram of the structure of the circulation device.

[0028] In the figure: 1. Freeze-thaw box; 2. Cover plate; 3. Sensing device; 4. Circulation device; 5. Cooling device; 6. Heating device; 7. Rainfall simulation device; 8. Computer; 9. Slope model; 10. Temperature sensor; 201. Handle; 301. Horizontal sensor plate; 302. Vertical sensor plate; 303. Temperature and humidity sensor; 401. Circulating water tank; 402. Filter; 403. Water inlet; 404. Water level meter; 405. Water pump; 501, condenser; 502, condenser tube; 503, cold air outlet; 601, heater; 602, heating tube; 603, hot air outlet; 701, fixing plate; 702, positioning plate; 703, simulation motor; 704, driving gear; 705, transmission belt; 706, driven gear; 707, simulation tube; 708, spray nozzle; 709, water supply pipe; 710, telescopic hose; 711, connecting pipe; 801, connecting pipe. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Example 1 like Figure 1 to Figure 9 As shown, a freeze-thaw slope moisture migration test device includes a freeze-thaw box 1 for accommodating a slope model 9, a cover plate 2 detachably covering the top opening of the freeze-thaw box 1, a sensor device 3 arranged inside the freeze-thaw box 1 for sensing the temperature and humidity of the slope model 9, a circulation device 4 for providing simulated rainwater to the freeze-thaw box 1 and recovering the simulated rainwater in the freeze-thaw box 1, a rainfall simulation device 7 arranged below the cover plate 2 for spraying simulated rainwater onto the slope model 9, a heating device 6 for heating the simulated rainwater and the air inside the freeze-thaw box 1 to simulate hot days, and a cooling device 5 for cooling the simulated rainwater and the air inside the freeze-thaw box 1, wherein: The circulation device 4 includes a circulating water tank 401 arranged at the outer bottom of the freeze-thaw box 1, a water inlet 403 connected to the circulating water tank 401 is provided at the top, a water level meter 404 is fixedly provided on one side of the inner wall of the circulating water tank 401, a water pump 405 is provided at the top of the circulating water tank 401, and a pipeline connected to the water inlet of the water pump 405 extends to the bottom of the circulating water tank 401. An opening is provided on the circulating water tank 401 to recover the simulated rainwater discharged from the bottom of the freeze-thaw box 1, and a filter screen 402 is provided at the opening; The rainfall simulation device 7 includes a plurality of simulation tubes 707 arranged below the cover plate 2, a spray port 708 is evenly provided below each simulation tube 707, a driven gear 706 is coaxially fixed to the outer side of the end of each simulation tube 707, and both ends of each simulation tube 707 are rotatably connected to the bottom of the cover plate 2, the driven gear 706 is transmission-connected to the driving gear 704 through a transmission belt 705, and the driving gear 704 is driven by a simulation motor 703. Preferably, a fixing plate 701 is fixed to one side of the cover plate 2, the fixing plate 701 is fixedly connected to the positioning plate 702, the simulation motor 703 is fixed to the positioning plate 702, one end of the simulation tube 707 is sealed, and the other end opening is connected to the connecting pipe 711 through a rotating sealing joint, the connecting pipe 711 is connected to the water supply pipe 709 through a telescopic hose 710, and the water supply pipe 709 is connected to the water outlet of the water pump 405; The sensor device 3 , the analog motor 703 , the water level meter 404 , the water pump 405 , the temperature increasing device 6 and the temperature decreasing device 5 are respectively electrically connected to a power source, and are respectively connected to a computer 8 for communication.

[0031] Example 2 The testing method of the freeze-thaw slope moisture migration testing device comprises the following steps: Open the cover plate 2, place the frozen slope model 9 in the freeze-thaw box 1, and adjust the slope angle of the slope model 9 as needed, and close the cover plate 2; when the cover plate 2 is opened, the telescopic hose 710 is extended, and when the cover plate 2 is closed, the telescopic hose 710 is contracted; The simulated rainwater is injected into the circulating water tank 401 through the water injection port 403, the water level is monitored by the water level meter 404, and the monitoring data is transmitted to the computer 8. When the water level exceeds a predetermined threshold (generally not exceeding the level below the filter 402), the computer 8 controls the water pump 405 to operate, and the water pump 405 transports the simulated rainwater in the circulating water tank 401 to the simulation pipe 707 through the water supply pipe 709 and the telescopic hose 710, and sprays the water on the surface of the slope model 9 through the spray port 708 below the simulation pipe 707; When the water pump 405 is started, the simulation motor 703 is started at the same time, and the simulation motor 703 drives the driving gear 704 to repeatedly rotate forward and reverse at a fixed angle, and the driving gear 704 drives the driven gear 706 to rotate synchronously through the transmission belt 705, and the driven gear 706 drives the simulation tube 707 to rotate synchronously, and the simulation tube 707 rotates forward and reverse at a fixed angle during the spraying process, so that the simulated rainwater can be more evenly distributed on the surface of the slope model 9, avoiding the problem of deviation in the simulation result caused by the simulated rainwater spraying downward at a fixed position; the simulated rainwater that penetrates the slope model 9 is filtered by the filter net 402 and circulated back to the circulating water tank 401; During the simulated rainwater circulation process, the cooling device 5 is started to cool the simulated rainwater and the air inside the freeze-thaw box 1 to simulate a cold day; the heating device 6 is started to heat the simulated rainwater and the air inside the freeze-thaw box 1 to simulate a hot day; During the simulation experiment, the sensor device 3 monitors the temperature and humidity of the slope model 9 in real time and transmits the signal to the computer 8, which performs moisture migration analysis based on the temperature and humidity.

[0032] Example 3 Preferably, the sensing device 3 includes a transverse sensing plate 301 fixedly mounted on the bottom of the freeze-thaw box 1 and a vertical sensing plate 302 fixedly mounted on the side of the freeze-thaw box 1. The surfaces of the transverse sensing plate 301 and the vertical sensing plate 302 are fixedly mounted with temperature and humidity sensors 303 arranged in a matrix. The temperature and humidity sensors 303 are connected to the computer 8 for communication, and the temperature and humidity sensors 303 are electrically connected to the power supply. The temperature and humidity sensors 303 distributed in a matrix on the transverse sensing plate 301 can monitor the migration process of moisture on the horizontal plane of the slope model 9, and the temperature and humidity sensors 303 distributed in a matrix on the vertical sensing plate 302 can monitor the migration process of moisture in the vertical direction of the slope model 9.

[0033] Preferably, a connecting tube 801 is provided between the freeze-thaw box 1 and the computer 8, and the communication lines and wires are arranged in the connecting tube 801, and the connecting tube 801 provides protection for them.

[0034] Preferably, handles 201 are symmetrically installed on the cover plate 2 to facilitate opening or closing the cover plate 2.

[0035] Preferably, an insulation layer is provided on the outside of the freeze-thaw box 1 to slow down the heat exchange between the freeze-thaw box 1 and the outside.

[0036] Preferably, temperature sensors 10 are fixedly installed on the tops of the inner walls on both sides of the freeze-thaw box 1 , and the temperature sensors 10 are electrically connected to the power supply, and the temperature sensors 10 are communicatively connected to the computer 8 .

[0037] Preferably, the cooling device 5 includes a condenser 501 fixedly installed on one side of the outside of the freeze-thaw box 1, the condenser 501 is electrically connected to the power supply, the condenser 501 is communicatively connected to the computer 8, one or more condensing tubes 502 are evenly installed below the condenser 501, and the end of each condensing tube 502 extends into the circulating water tank 401, and a cold air outlet 503 is opened on one side of the condenser 501, and the cold air outlet 503 is communicated with the inside of the freeze-thaw box 1.

[0038] When in use, the computer 8 controls the operation of the condenser 501 in the cooling device 5, so that the condenser 501 generates cold air, and the cold air is discharged into the circulating water tank 401 through the condenser pipe 502, so as to cool the simulated rainwater in the circulating water tank 401 so that it becomes cold water in cold weather during the spraying process, and the generated cold air is discharged into the freeze-thaw box 1 through the cold air outlet 503, so as to simulate the environment in which the slope model 9 exists, and the temperature in the freeze-thaw box 1 is monitored by the temperature sensor 10. When the low temperature requirement is met, the temperature and humidity are monitored by a plurality of temperature and humidity sensors 303 on the surface of the horizontal sensor plate 301 and the vertical sensor plate 302, and the monitoring data is transmitted to the computer 8, so as to analyze the data of water level migration.

[0039] Preferably, the temperature increasing device 6 comprises a heater 601 fixedly mounted on one side of the outside of the freeze-thaw box 1, the heater 601 being electrically connected to a power source, the heater 601 being communicatively connected to a computer 8, one or more heating tubes 602 being fixedly mounted below the heater 601, the end of each heating tube 602 extending into the circulating water tank 401, a hot air outlet 603 being provided on one side of the heater 601, the hot air outlet 603 being communicated with the inside of the freeze-thaw box 1, when the heater 601 is started, hot air enters the freeze-thaw box 1 through the hot air outlet 603, heats the slope model 9 and the air in the freeze-thaw box 1, and at the same time, the hot air enters the circulating water tank 401 through the heating tube 602, thereby increasing the temperature of the simulated rainwater.

[0040] When the slope model 9 needs to be thawed, the computer 8 is used to control the operation of the heater 601 in the heating device 6, so that the operation of the heater 601 generates heat, and the generated heat is transmitted to the circulating water tank 401 through the heating pipe 602, so that the temperature of the simulated rainwater in the circulating water tank 401 is increased to simulate the moisture in hot weather, and the generated hot air is transmitted to the freeze-thaw box 1, so that the temperature in the freeze-thaw box 1 is increased to thaw the slope model 9. Similarly, the temperature in the freeze-thaw box 1 is monitored by the temperature sensor 10. When the temperature requirement is met, the temperature and humidity are monitored by a plurality of temperature and humidity sensors 303 on the surface of the horizontal sensor plate 301 and the vertical sensor plate 302, and the monitoring data is transmitted to the computer 8, so as to analyze the data of water level migration.

[0041] When the slope model 9 in the freeze-thaw box 1 needs to be frozen again, the water pump 405 is turned off, the condenser 501 is turned on, the temperature is adjusted to below 0°C, the cold air outlet 503 discharges cold air below 0°C, the slope model 9 is frozen, the condenser 501 is turned off, and the heater 601 is started again. This process is repeated to simulate the freeze-thaw cycle process.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A freeze-thaw slope moisture migration test device, characterized in that: The invention comprises a freeze-thaw box for accommodating a slope model, a cover plate detachably covering the top opening of the freeze-thaw box, a sensor device arranged inside the freeze-thaw box for sensing the temperature and humidity of the slope model, a circulation device for providing simulated rainwater to the freeze-thaw box and recovering the simulated rainwater in the freeze-thaw box, a rainfall simulation device arranged below the cover plate for spraying simulated rainwater onto the slope model, a heating device for heating the simulated rainwater and the air inside the freeze-thaw box, and a cooling device for cooling the simulated rainwater and the air inside the freeze-thaw box, wherein: The circulation device comprises a circulating water tank arranged at the outer bottom of the freeze-thaw box, a water inlet connected to the circulating water tank is arranged at the top of the circulating water tank, a water level meter is fixedly arranged on one side of the inner wall of the circulating water tank, a water pump is arranged at the top of the circulating water tank, a pipeline connected to the water inlet of the water pump extends to the bottom of the circulating water tank, an opening is arranged on the circulating water tank to recover the simulated rainwater discharged from the bottom of the freeze-thaw box, and a filter is arranged at the opening; The rainfall simulation device comprises a plurality of simulation tubes arranged below the cover plate, each simulation tube has a spray port evenly arranged below, a driven gear is coaxially fixed to the outer side of the end of each simulation tube, both ends of each simulation tube are rotatably connected to the bottom of the cover plate, the driven gear is connected to the driving gear through a transmission belt, the driving gear is driven by a simulation motor, one end of the simulation tube is sealed, and the other end is open and connected to the connecting pipe through a rotating sealing joint, the connecting pipe is connected to the water supply pipe through a telescopic hose, and the water supply pipe is connected to the water outlet of the water pump; The sensor device, the simulation motor, the water level meter, the water pump, the heating device and the cooling device are electrically connected to the power supply and are communicatively connected to the computer.

2. The freeze-thaw slope moisture migration test device according to claim 1, characterized in that: A fixing plate is fixed on one side of the cover plate, the fixing plate is fixedly connected to the positioning plate, and the simulation motor is fixed on the positioning plate.

3. The freeze-thaw slope moisture migration testing device according to claim 1, characterized in that: A connecting pipe is arranged between the freeze-thaw box and the computer, and a communication line and an electric wire are arranged in the connecting pipe.

4. The freeze-thaw slope moisture migration testing device according to claim 1, characterized in that: The handles are symmetrically installed above the cover plate.

5. The freeze-thaw slope moisture migration testing device according to claim 1, characterized in that: A heat preservation layer is arranged on the outside of the freeze-thaw box.

6. The freeze-thaw slope moisture migration testing device according to claim 1, characterized in that: Temperature sensors are fixedly installed on the tops of the inner walls on both sides of the freeze-thaw box. The temperature sensors are electrically connected to a power source and are communicatively connected to a computer.

7. The freeze-thaw slope moisture migration testing device according to claim 1, characterized in that: The cooling device includes a condenser fixedly installed on one side of the outside of the freeze-thaw box, the condenser is electrically connected to a power source, the condenser is communicatively connected to a computer, one or more condensing tubes are evenly installed below the condenser, the end of each condensing tube extends into a circulating water tank, a cold air outlet is opened on one side of the condenser, and the cold air outlet is communicated with the inside of the freeze-thaw box.

8. The freeze-thaw slope moisture migration testing device according to claim 1, characterized in that: The temperature raising device comprises a heater fixedly mounted on one side of the outside of the freeze-thaw box, the heater is electrically connected to a power source, the heater is communicatively connected to a computer, one or more heating tubes are fixedly mounted below the heater, the end of each heating tube extends into a circulating water tank, a hot air outlet is provided on one side of the heater, and the hot air outlet is communicated with the inside of the freeze-thaw box.

9. The freeze-thaw slope moisture migration testing device according to claim 1, characterized in that: A fixing plate is fixed on one side of the cover plate, the fixing plate is fixedly connected to the positioning plate, and the simulation motor is fixed on the positioning plate.

10. The test method of the freeze-thaw slope moisture migration test device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Open the cover, place the frozen slope model in the freeze-thaw box, and adjust the slope angle of the slope model according to the needs, and close the cover; when the cover is opened, the telescopic hose extends, and when the cover is closed, the telescopic hose contracts; The simulated rainwater is injected into the circulating water tank through the water injection port, the water level is monitored by the water level meter, and the monitoring data is transmitted to the computer. When the water level exceeds the predetermined threshold, the computer controls the operation of the water pump, and the water pump transports the simulated rainwater in the circulating water tank to the simulation pipe through the water supply pipe and the telescopic hose, and sprays the water on the surface of the slope model through the spray port under the simulation pipe; When the water pump is started, the simulation motor is started at the same time, and the simulation motor drives the driving gear to repeatedly rotate forward and reverse at a fixed angle. The driving gear drives the driven gear to rotate synchronously through the transmission belt, and the driven gear drives the simulation tube to rotate synchronously. The simulation tube rotates forward and reverse at a fixed angle during the spraying process, so that the simulated rainwater can be more evenly distributed on the surface of the slope model, avoiding the problem of deviation in the simulation result caused by the simulated rainwater spraying downward at a fixed position; the simulated rainwater that penetrates the slope model is filtered through the filter net and circulated back to the circulating water tank; During the simulated rainwater circulation process, the cooling device is started to cool the simulated rainwater and the air inside the freeze-thaw box to simulate a cold day; the heating device is started to heat the simulated rainwater and the air inside the freeze-thaw box to simulate a hot day; During the simulation experiment, the sensor device monitors the temperature and humidity of the slope model in real time and transmits the signal to the computer, which performs moisture migration analysis based on the temperature and humidity.

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