Indoor device for simulating stability of indoor slope under earthquake and rainfall coupling effect
By designing indoor devices that simulate earthquake and rainfall systems, the problem of the failure to accurately simulate the stability of the lower slope in the existing technology is solved, and efficient and accurate monitoring of slope stability research is achieved, and scientific research costs are reduced.
Patent Information
- Application Number
- CN202510528398.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2025-08-01
AI Technical Summary
The existing experimental methods cannot accurately simulate the stability of the slope under the coupling effect of earthquakes and rainfall. The outdoor prototype test is limited by the environment and time. The indoor simulation device has displacement influence, so it is impossible to effectively study the stability of the slope under actual natural earthquakes and rainfall conditions.
An indoor device including a simulation cabin, a simulated seismic system, a simulated rainfall system and a monitoring system is designed. By simulating the slope body in the cabin, the electric telescopic rod structure is used to simulate the seismic transverse and longitudinal waves, the rainfall showerhead simulates the rainfall environment, and the sensor monitors the changes in slope stability.
It improves the accuracy and efficiency of slope stability research, reduces scientific research costs, can monitor the stability changes of slopes under the coupling effect of earthquakes and rainfall in real time, and judges the critical value of slope failure.
Smart Images
Figure CN120405086A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of slope stability simulation devices, and particularly to an indoor device for simulating the stability of indoor slopes under the combined action of earthquake and rainfall. Background Art
[0002] Slope instability refers to the phenomenon that under the action of various external adverse factors such as rainfall, earthquake, and human engineering activities, the structure of the slope soil or rock mass changes, losing its original stability and resulting in failures such as sliding and collapse. This phenomenon poses a great threat to the surrounding environment and people's lives and property. Rainfall infiltration forms groundwater seepage in the slope body, causing the softening of the rock and soil mass, the decrease of matrix suction, and at the same time reducing the effective stress acting on the rock and soil mass, thus reducing the shear strength of the slope rock and soil mass. As the pore water pressure increases, the shear strength of the rock and soil mass continuously decreases. When the pore water pressure increases to be the same as the normal stress, the shear strength of the soil structure plane is equal to the cohesion of the rock and soil mass, and the slope body is in a critical state with a high risk. The impact of earthquake on slope stability is complex and multi-dimensional. First, the strong vibration generated by the earthquake can directly apply additional forces to the slope, including seismic forces in the horizontal and vertical directions, which may exceed the anti-sliding force of the slope and lead to slope instability. Second, the ground vibration caused by the earthquake may cause damage to the internal structure of the slope, such as the expansion of cracks and the fragmentation of the rock and soil mass, which may all reduce the slope stability.
[0003] Currently, the research on slope stability mainly adopts numerical simulation and outdoor prototype test methods. With numerical simulation, accurate results cannot be obtained due to problems such as accuracy. Outdoor prototype tests are restricted by environmental, time and other issues, making the experiments full of too much uncertainty.
[0004] The existing experimental methods are to place the slope body in the test box, drive the test box to move horizontally back and forth through a driving device to simulate the seismic shear wave, or use a hydraulic cylinder push rod to push the test box to move vertically and horizontally back and forth to simulate the seismic shear wave and longitudinal wave, and then achieve the rainfall effect through a rainfall system. Both rely on external forces to move the test box, which has an impact on the displacement of the slope in the test box and there is a certain deviation from the effect generated by the actual natural earthquake. Therefore, there are few devices for simulating slope stability under the combined action of earthquake and rainfall indoors. Therefore, it is of great significance to propose an indoor device for simulating slope stability under the combined action of earthquake and rainfall. Summary of the Invention
[0005] To overcome the above-mentioned problems, the purpose of the present invention is to provide an indoor device for simulating the stability of indoor slopes under the combined action of earthquake and rainfall. By simulating a certain slope in the area through the indoor simulation device, the research efficiency is greatly improved and the scientific research cost is reduced.
[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: An indoor device for simulating the stability of an indoor slope under the coupled action of earthquake and rainfall, comprising a simulation chamber, a simulated earthquake system, a simulated rainfall system and a monitoring system. A slope body for constructing a slope environment is provided at the bottom of the simulation chamber. Sensors are provided inside the slope body. The simulated earthquake system is used to simulate the shear wave and longitudinal wave of an earthquake for the simulation chamber and the slope body therein. The simulated rainfall system is used to simulate a rainfall environment for the simulation chamber and the slope body therein. The monitoring system is used to monitor the shape change of the slope body under the coupled action of earthquake and rainfall and to monitor the change law of the stability of the slope environment.
[0007] Preferably, the simulation chamber includes a load-bearing bottom plate, two side plates and a baffle plate that are spliced together. The spliced simulation chamber is in the shape of a rectangular parallelepiped with an open top. The slope body is placed on the load-bearing bottom plate. A camera of the monitoring system is installed on the inner side of the splicing position of one of the side plates and the baffle plate, that is, the camera is arranged obliquely behind the interior of the simulation chamber. A control display panel is provided on the outer side of one of the side plates.
[0008] Preferably, the simulated earthquake system includes a first bottom plate, a second bottom plate, a support plate, a cover plate and an electric telescopic rod structure. The first bottom plate is located directly below the load-bearing bottom plate. The first bottom plate and the load-bearing bottom plate are connected by a first support column. The second bottom plate is parallel to and outwardly connected to the load-bearing bottom plate at one end of the baffle plate. The bottom end of the second bottom plate is stabilized by a second support column. The support plate is perpendicular to the outer side of the top end of the second bottom plate. One end of the cover plate is connected to the top end of the support plate, and the other end is connected to one side of the baffle plate, and the cover plate is parallel to the second bottom plate. The electric telescopic rod structure includes several vertically placed and horizontally placed ones. The vertically placed electric telescopic rod structure is located between the first bottom plate and the load-bearing bottom plate, and the top of the electric telescopic rod structure is connected to the load-bearing bottom plate. The horizontally placed electric telescopic rod structure is perpendicular to the bottom corners and the middle position on the lower side of the support plate and is parallel to the second bottom plate, and the top of the electric telescopic rod structure is connected to the baffle plate. The simulated earthquake system is located directly below and directly behind the simulation chamber, and impacts the simulation chamber through the reciprocating telescopic movement of the electric telescopic rod structure.
[0009] Preferably, the simulated rainfall system includes a water storage tank, a water pump, a water inlet pipe, a water delivery pipe, a rainfall pipe rack, rainfall sprinklers, a switch valve, and a flow rate valve. The water storage tank is located on one side of the simulation chamber and is parallel to the first bottom plate. The water pump is located inside the water storage tank to provide power for the simulated rainfall system. The bottom end of the water inlet pipe is below the water surface of the water storage tank, and its top end is connected to one end of the water delivery pipe. The other end of the water delivery pipe is connected to the rainfall pipe rack. The rainfall pipe rack is located directly above the simulation chamber. The rainfall pipe rack is provided with several rainfall pipelines, and each rainfall pipeline communicates with each other and is parallel. The rainfall sprinklers are arranged at the bottom ends of the rainfall pipelines. The rainfall sprinklers can cover the entire simulation chamber and spray water into the simulation chamber to simulate a rainfall environment. The switch valve and the flow rate valve are arranged on the outer surface of the water storage tank to control the rainfall switch and adjust the water flow rate, thereby controlling the size of the rainfall.
[0010] Preferably, the electric telescopic rod structure includes a telescopic rod motor, a speed reducer, a fixed support, a gear, a screw rod, a screw buckle, a telescopic column, and a conduit. The telescopic rod motor is located at the bottom of the electric telescopic rod structure to provide power. The speed reducer is located directly above the telescopic rod motor. The fixed support is located in the middle of the speed reducer. The speed reducer is internally provided with a speed control gear for controlling the rotation speed. The gear is arranged directly above the fixed support, and the gear is connected to the rotating shaft inside the speed reducer. The screw rod is located directly above the gear. The screw buckle is located on the screw rod. The telescopic column is located directly above the screw rod. The conduit is located above the telescopic column. The fixed support is used to fixedly support the gear, the screw rod, and the telescopic column. The rotation of the gear drives the screw rod containing the screw buckle to rotate and rise, thereby driving the telescopic column to also rise accordingly until the screw buckle fixes the telescopic column on the screw rod, so as to realize the vertical electric telescopic rod structure to move in the up and down direction and the horizontal electric telescopic rod structure to move in the left and right direction. The conduit plays a role in supporting the bearing plate and protecting the internal structure of the electric telescopic rod structure.
[0011] Preferably, each electric telescopic rod structure of the simulated earthquake system is connected to a power supply and a control display panel. The control display panel can start each electric telescopic rod structure separately in sequence, or start all the electric telescopic rod structures simultaneously, or start all the vertically placed electric telescopic rod structures alone or start all the horizontally placed electric telescopic rod structures alone, so as to comprehensively simulate the shear wave and longitudinal wave of an earthquake respectively. The control display panel realizes the speed of telescopic rod extension and contraction by adjusting the gear rotation speed of each electric telescopic rod structure, so as to simulate the influence of earthquake intensity on the slope body.
[0012] Preferably, the simulated earthquake system can respectively study the influence of earthquake shear wave and longitudinal wave on the slope body through each electric telescopic rod structure, and can also study the influence of earthquake magnitude on the slope body through the speed of the telescopic rod.
[0013] Preferably, the sensor includes a displacement sensor and a moisture content sensor, and the displacement sensor and the moisture content sensor are respectively connected to the control display panel. By using the changes of the displacement sensor and the moisture content sensor in the control display panel, the moisture content value and the displacement change value in the soil are observed and monitored to analyze the stability of the slope body, and the changes in the stability of the slope body under the action of earthquake and rainfall are recorded. The displacement sensor and the moisture content sensor are used simultaneously to monitor the changes between the data, so as to avoid the overall relative displacement of the slope body under earthquake and rainfall conditions, which may cause the data of the displacement sensor not to change and affect the experimental results.
[0014] Preferably, the switches of the simulated rainfall system and the simulated earthquake system are not connected to each other. The experiment on the influence of simulated earthquake on the stability of the slope body can be carried out alone, the experiment on the influence of simulated rainfall on the stability of the slope body can be carried out alone, and the experiment on the influence of the coupling action of simulated earthquake and rainfall on the stability of the slope body can also be carried out.
[0015] Preferably, both side plates of the simulation chamber are composed of composite transparent material panels.
[0016] The beneficial effects of the present invention are as follows: By placing different types of slope bodies in the simulation chamber and studying the influence of earthquake and rainfall on the stability of the slope body under the action of the simulated earthquake system and the simulated rainfall system, the real-time changes of the slope stability can be monitored by sensors, so as to judge whether the critical value of slope failure is reached; The influence of earthquake or rainfall on the stability of different types of slope bodies can also be studied separately. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of the overall structure of this embodiment;
[0018] Figure 2 is a top view schematic diagram of the overall structure of this embodiment;
[0019] Figure 3 is a side view schematic diagram of the overall structure of this embodiment;
[0020] Figure 4 is a schematic diagram of the structure of the electric telescopic rod of this embodiment;
[0021] Figure 5 is an exploded view of the structure of the electric telescopic rod of this embodiment;
[0022] Figure 6 is a schematic diagram of the structure of the simulated rainfall system of this embodiment;
[0023] Figure 7 is a schematic diagram of the actual application of this embodiment.
[0024] In the figure: 1, water storage tank; 2, water inlet pipe; 3, water delivery pipe; 4, rainfall pipe rack; 5, rainfall shower head; 6, switch valve; 7, flow rate valve; 8, load-bearing bottom plate; 9, first bottom plate; 10, support plate; 11, first glass plate; 12, first support column; 13, second support column; 14, electric telescopic rod structure; 15, second bottom plate; 16, cover plate; 17, baffle; 18, second glass plate; 19, camera; 20, control and display panel; 21, power supply; 22, wire; 23, slope body; 24, displacement sensor; 25, water content sensor; 1401, telescopic rod motor; 1402, reduction gearbox; 1403, conduit; 1404, telescopic column; 1405, fixed support; 1406, gear; 1407, screw rod; 1408, rotary buckle. Detailed implementation mode
[0025] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.
[0026] See Figures 1 - 7 , this embodiment discloses an indoor device for simulating the stability of indoor slopes under the coupled action of earthquake and rainfall, including a simulation chamber, a simulated earthquake system, a simulated rainfall system, and a monitoring system. The simulation chamber includes a load-bearing bottom plate 8, two side plates, and a baffle 17 that are spliced together. In this embodiment, the two side plates are the first glass plate 11 and the second glass plate 18 respectively. Selecting transparent materials for the two side plates along the long side direction is more convenient for observation. After being spliced together, the simulation chamber is in the shape of a rectangular cuboid with an open top. Among them, the camera 19 of the monitoring system is installed on the inner side of the splicing position of the first glass plate 11 and the baffle 17, and the control and display panel 20 is arranged on the outer side of the second glass plate 18. The slope body 23 for constructing the slope environment is arranged at the bottom of the simulation chamber. The slope body 23 is placed on the load-bearing bottom plate 8, and sensors are arranged inside the slope body 23. The simulated earthquake system is used to simulate the shear wave and longitudinal wave of the earthquake for the simulation chamber and the slope body 23 therein. The simulated rainfall system is used to simulate the rainfall environment for the simulation chamber and the slope body 23 therein. The monitoring system is used to monitor the shape change of the slope body 23 under the coupled action of earthquake and rainfall, and to monitor the change law of the stability of the slope environment.
[0027] The described simulated earthquake system includes a first bottom plate 9, a second bottom plate 15, a support plate 10, a cover plate 16, and an electric telescopic rod structure 14. The first bottom plate 9 is directly below the load-bearing bottom plate 8. The first bottom plate 9 is connected to the load-bearing bottom plate 8 through a first support column 12. The second bottom plate 15 is parallel to and externally connected to the load-bearing bottom plate 8 at one end of the baffle 17. The bottom end of the second bottom plate 15 is stabilized by a second support column 13. The support plate 10 is perpendicular to the outside of the top end of the second bottom plate 15. One end of the cover plate 16 is connected to the top end of the support plate 10, and the other end is connected to one side of the baffle 17, and the cover plate 16 is parallel to the second bottom plate 15. There are several vertically placed and horizontally placed electric telescopic rod structures 14. The vertically placed electric telescopic rod structures 14 are located between the first bottom plate 9 and the load-bearing bottom plate 8, and the top of the electric telescopic rod structure 14 is connected to the load-bearing bottom plate 8. The horizontally placed electric telescopic rod structures 14 are perpendicular to the bottom corners and the middle position on the lower side of the support plate 10 and are parallel to the second bottom plate 15, and the top of the electric telescopic rod structure 14 is connected to the baffle 17. The electric telescopic rod structure 14 includes a telescopic rod motor 1401, a reduction gearbox 1402, a fixed support 1405, a gear 1406, a screw rod 1407, a screw buckle 1408, a telescopic column 1404, and a conduit 1403. The telescopic rod motor 1401 is located at the bottom of the electric telescopic rod structure 14 to provide power. The reduction gearbox 1402 is directly above the telescopic rod motor 1401. The fixed support 1405 is located in the middle of the reduction gearbox 1402. The internal part of the reduction gearbox 1402 is provided with a speed gear for controlling the rotation speed. The gear 1406 is arranged directly above the fixed support 1405, and the gear 1406 is connected to the rotating shaft in the reduction gearbox 1402. The screw rod 1407 is located directly above the gear 1406. The screw buckle 1408 is located on the screw rod 1407. The telescopic column 1404 is located directly above the screw rod 1407. The conduit 1403 is located above the telescopic column 1404. The fixed support 1405 is used to fixedly support the gear 1406, the screw rod 1407, and the telescopic column 1404. The rotation of the gear 1406 drives the screw rod 1407 containing the screw buckle 1408 to rotate and rise, thereby driving the telescopic column 1404 to also rise accordingly until the screw buckle 1408 fixes the telescopic column 1404 on the screw rod 1407, so as to realize the up-and-down movement of the vertically placed electric telescopic rod structure 14 and the left-and-right movement of the horizontally placed electric telescopic rod structure 14. The conduit 1403 plays a role in supporting the load-bearing plate 8 and protecting the internal structure of the electric telescopic rod structure 14.
[0028] Each electric telescopic rod structure 14 of the simulated earthquake system is connected to the power supply 21 and the control display panel 20. The control display panel 20 can start each electric telescopic rod structure 14 sequentially, start all the electric telescopic rod structures 14 simultaneously, or start all the vertically placed electric telescopic rod structures 14 alone or start all the horizontally placed electric telescopic rod structures 14 alone, so as to comprehensively simulate the shear wave and longitudinal wave of the earthquake respectively. The control display panel 20 realizes the speed of telescopic rod extension and retraction by adjusting the rotation speed of the gear 1406 of each electric telescopic rod structure 14, so as to simulate the influence of earthquake intensity on the slope body 23. The simulated earthquake system can respectively study the influence of earthquake shear wave and longitudinal wave on the slope body 23 through each electric telescopic rod structure 14, and can also study the influence of earthquake magnitude on the slope body 23 through the speed of the telescopic rod.
[0029] The simulated rainfall system includes a water storage tank 1, a water pump, a water inlet pipe 2, a water delivery pipe 3, a rainfall pipe rack 4, rainfall sprinklers 5, a switch valve 6, and a flow rate valve 7. The water storage tank 1 is located on one side of the simulation chamber and is parallel to the first bottom plate 9. The water pump is located inside the water storage tank 1 and provides power for the simulated rainfall system. The bottom end of the water inlet pipe 2 is below the water surface of the water storage tank 1, and its top end is connected to one end of the water delivery pipe 3. The other end of the water delivery pipe 3 is connected to the rainfall pipe rack 4. The rainfall pipe rack 4 is located directly above the simulation chamber. The rainfall pipe rack 4 is provided with several rainfall pipelines, and each rainfall pipeline communicates with each other and is parallel. The rainfall sprinklers 5 are arranged at the bottom ends of the rainfall pipelines. The rainfall sprinklers 5 can cover the entire simulation chamber and spray water into the simulation chamber to simulate a rainfall environment. The switch valve 6 and the flow rate valve 7 are arranged on the outer surface of the water storage tank 1 and are used to control the rainfall switch and adjust the water flow rate, so as to control the amount of rainfall.
[0030] The sensors include a displacement sensor 24 and a water content sensor 25. The displacement sensor 24 and the water content sensor 25 are respectively connected to the control display panel 20. By using the changes of the displacement sensor 24 and the water content sensor 25 in the control display panel 20, the water content value and displacement change value in the soil are observed and monitored to analyze the stability of the slope body 23, and the changes in the stability of the slope body 23 under the action of earthquake and rainfall are recorded.
[0031] Specifically, when conducting simulations using the simulated rainfall system, water is stored in the storage tank 1. Initially, the storage tank 1 is designed to have a volume of two cubic meters, which can be adjusted according to actual needs later. The flow rate valve 7 is located on the storage tank 1 and can adjust the flow rate level, generally divided into three levels, thereby controlling the flow rate and velocity. Under the action of the water pump, the water in the storage tank 1 is transported to the water delivery pipe 3 through the water inlet pipe 2. The water delivery pipe 3 is connected to the rainfall pipe rack 4 for transporting water into the rainfall pipe rack 4. There are a total of seven lines in the rainfall pipe rack 4, and each pipe rack line is interconnected. Each rainfall pipe rack 4 has three rotating rainfall sprinklers 5.
[0032] The first bottom plate 9 has the same size as the load-bearing bottom plate 8 and is located directly below the simulation cabin, used to support and fix the electric telescopic rod structure 14. There are a total of six vertically placed electric telescopic rod structures 14, respectively directly above the four corners and in the middle of both sides of the first bottom plate 9, to achieve the up and down movement of the telescopic rod along the vertical direction to impact the simulation cabin; there are a total of three horizontally placed electric telescopic rod structures 14, respectively at the bottom corners and the middle position on the lower side of the support plate 10, to achieve the front and back movement of the telescopic rod along the horizontal direction to impact the simulation cabin. The power supply 21 is located directly below the load-bearing bottom plate 8, and each electric telescopic rod structure is connected to the power supply 21 through a wire 22, thereby achieving the purpose of electric telescoping. When the screw rod 1407 rotates and rises, the telescopic column 1404 follows and rises, thereby achieving the impact on the simulation cabin by the electric telescopic rod structure at the corresponding position along the up and down direction and the front and back direction.
[0033] Through the simulated rainfall system and the simulated earthquake system, the stability of the slope body under rainfall and earthquake conditions is simulated. Among them, when the simulated rainfall system and the simulated earthquake system are started simultaneously, the external changes of the slope body are monitored through the monitoring system; after a period of time, the changes in the control display panel are observed using the displacement sensor and the moisture content sensor, and the moisture content value and displacement change value in the soil are observed and monitored to analyze the stability of the slope body, and the change law of the stability of the slope body under the action of earthquake and rainfall is obtained.
[0034] The above embodiments are only used to illustrate the technical concept and features of the present invention, and their purpose is to enable those familiar with this technology to understand the content of the present invention and implement it, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.
Claims
1. An indoor device for simulating the stability of indoor slopes under the coupled action of earthquakes and rainfall, characterized in that, It includes a simulation cabin, a simulated earthquake system, a simulated rainfall system and a monitoring system. A slope body for constructing a slope environment is provided at the bottom of the simulation cabin. Sensors are provided inside the slope body. The simulated earthquake system is used to simulate the shear wave and longitudinal wave of an earthquake for the simulation cabin and the slope body therein. The simulated rainfall system is used to simulate a rainfall environment for the simulation cabin and the slope body therein. The monitoring system is used to monitor the shape change of the slope body under the coupled action of earthquake and rainfall, and to monitor the change law of the slope environment stability.
2. The indoor device for simulating the stability of indoor slopes under the coupled action of earthquake and rainfall according to claim 1, characterized in that, The simulation cabin includes a load-bearing bottom plate, two side plates and a baffle plate that are spliced together. After splicing, the simulation cabin is in the shape of a rectangular with an open top. The slope body is placed on the load-bearing bottom plate. A camera of the monitoring system is installed on the inner side of the splicing position of one of the side plates and the baffle plate. A control display panel is provided on the outer side of one of the side plates.
3. The indoor device for simulating the stability of indoor slopes under the coupling action of earthquake and rainfall according to claim 2, characterized in that, The simulated earthquake system includes a first bottom plate, a second bottom plate, a support plate, a cover plate and an electric telescopic rod structure. The first bottom plate is located directly below the load-bearing bottom plate. The first bottom plate and the load-bearing bottom plate are connected by a first support column. The second bottom plate is parallel to and outwardly connected to the load-bearing bottom plate at one end of the baffle plate. The bottom end of the second bottom plate is stabilized by a second support column. The support plate is perpendicular to the outer side of the top end of the second bottom plate. One end of the cover plate is connected to the top end of the support plate, and the other end is connected to one side of the baffle plate, and the cover plate is parallel to the second bottom plate. The electric telescopic rod structure includes several vertically placed and horizontally placed ones. The vertically placed electric telescopic rod structure is located between the first bottom plate and the load-bearing bottom plate, and the top of the electric telescopic rod structure is connected to the load-bearing bottom plate. The horizontally placed electric telescopic rod structure is perpendicular to the bottom corners and the middle position on the lower side of the support plate and is parallel to the second bottom plate, and the top of the electric telescopic rod structure is connected to the baffle plate.
4. The indoor device for simulating the stability of indoor slopes under the coupled action of earthquake and rainfall according to claim 3, characterized in that, The simulated rainfall system includes a water storage tank, a water pump, a water inlet pipe, a water delivery pipe, a rainfall pipe rack, rainfall sprinklers, a switch valve and a flow rate valve. The water storage tank is located on one side of the simulation cabin and is parallel to the first bottom plate. The water pump is located inside the water storage tank and provides power for the simulated rainfall system. The bottom end of the water inlet pipe is below the water surface of the water storage tank, and its top end is connected to one end of the water delivery pipe. The other end of the water delivery pipe is connected to the rainfall pipe rack. The rainfall pipe rack is located directly above the simulation cabin. The rainfall pipe rack is provided with several rainfall pipelines. Each rainfall pipeline communicates with each other and is parallel. The rainfall sprinklers are provided at the bottom ends of the rainfall pipelines. The rainfall sprinklers can cover the entire simulation cabin and spray water into the simulation cabin to simulate a rainfall environment. The switch valve and the flow rate valve are provided on the outer surface of the water storage tank and are used to control the rainfall switch and adjust the water flow rate, so as to control the size of the rainfall.
5. The indoor device for simulating the stability of indoor slopes under the coupled action of earthquake and rainfall according to claim 3, characterized in that, The electric telescopic rod structure includes a telescopic rod motor, a reduction gearbox, a fixed support, a gear, a screw rod, a screw buckle, a telescopic column and a conduit. The telescopic rod motor is located at the bottom of the electric telescopic rod structure and is used to provide power. The reduction gearbox is located directly above the telescopic rod motor. The fixed support is located in the center of the reduction gearbox. A speed gear for controlling the rotation speed is arranged inside the reduction gearbox. The gear is located directly above the fixed support and is connected to the rotating shaft in the reduction gearbox. The screw rod is located directly above the gear. The screw buckle is located on the screw rod. The telescopic column is located directly above the screw rod. The conduit is located above the telescopic column. The fixed support is used to fixedly support the gear, the screw rod and the telescopic column. The rotation of the gear drives the screw rod containing the screw buckle to rotate and rise, thereby driving the telescopic column to rise accordingly until the screw buckle fixes the telescopic column on the screw rod, so as to realize the movement of the vertically placed electric telescopic rod structure in the up and down direction and the movement of the horizontally placed electric telescopic rod structure in the left and right direction.
6. The indoor device for simulating the stability of an indoor slope under the coupled action of earthquake and rainfall according to claim 5, characterized in that Each electric telescopic rod structure of the simulated earthquake system is connected to a power supply and a control display panel. The control display panel can start each electric telescopic rod structure sequentially or start all the electric telescopic rod structures simultaneously, or start all the vertically placed electric telescopic rod structures alone or start all the horizontally placed electric telescopic rod structures alone, so as to comprehensively simulate the shear wave and longitudinal wave of an earthquake. The control display panel adjusts the gear rotation speed of each electric telescopic rod structure to realize the speed of telescopic rod extension and retraction, thereby simulating the influence of earthquake intensity on the slope body.
7. The indoor device for simulating the stability of an indoor slope under the coupled action of earthquake and rainfall according to claim 6, characterized in that, The simulated earthquake system can respectively study the influence of earthquake shear wave and longitudinal wave on the slope body through each electric telescopic rod structure, and can also study the influence of earthquake magnitude on the slope body through the speed of the telescopic rod.
8. The indoor device for simulating the stability of indoor slopes under the coupled action of earthquake and rainfall according to claim 6, characterized in that, The sensors include a displacement sensor and a moisture content sensor. The displacement sensor and the moisture content sensor are respectively connected to the control display panel. By using the change conditions of the displacement sensor and the moisture content sensor in the control display panel, observe and monitor the moisture content value and displacement change value in the soil to analyze the stability of the slope body, and record the changes in the stability of the slope body under the action of earthquake and rainfall.