Simulation experimental device for slope instability mechanism under the coupling action of earthquake and rainfall

Abstract

The embodiment of the present application provides a simulation experimental device for the instability mechanism of slopes under the coupling action of earthquakes and rainfall, which relates to the technical field of earthquake simulation equipment. The simulation experimental device for the instability mechanism of slopes under the coupling action of earthquakes and rainfall includes: a model storage mechanism, a driving transmission mechanism, the transmission mechanism is located at the lower end of the model storage mechanism, and the transmission mechanism vibrates the model in the model storage mechanism, an adjustment mechanism, the adjustment mechanism is located at the lower end of the model storage mechanism, the adjustment mechanism is located in the middle of the transmission mechanism, and the transmission mechanism moves upward and drives the adjustment mechanism to rotate. The cooperation position and state of the cam and the vibration convex plate can be precisely changed, so as to realize the precise adjustment of the vibration amplitudes of the toe, the top and both sides of the slope of the experimental model, meet the requirements for simulating the vibration amplitude of slopes under different experimental conditions, and help to deeply study the influence of the vibration amplitude on the instability mechanism of slopes.

Description

Technical Field

[0001] This application relates to the technical field of earthquake simulation equipment. Specifically, it relates to an experimental device for simulating the instability mechanism of slopes under the coupled action of earthquakes and rainfall. Background Art

[0002] Earthquakes and rainfall are two key factors leading to slope instability. The strong vibrations generated by earthquakes will damage the internal structure of slope soil and reduce the shear strength of the soil. Rainfall, on the other hand, will increase the water content of the soil and the pore water pressure, further weakening the stability of the soil. The instability mechanism of slopes under their coupled action is extremely complex and is the focus and difficulty of disaster prevention and mitigation research in geotechnical engineering. Therefore, the use of an experimental device for simulating the instability mechanism of slopes can enable staff to analyze the response differences of various factors such as different geological conditions, slope gradients, and soil types under the coupled action, so as to establish a more perfect slope instability prediction model and evaluation system.

[0003] However, most of the existing experimental devices for simulating the instability mechanism of slopes are difficult to separately adjust the vibration parameters and rainfall intensity at the toe, top, and both sides of the experimental model, and it is also difficult to accurately set parameters at multiple positions of the model, making it impossible to effectively simulate the various instability parameter changes that may occur in different parts of the slope due to many factors such as terrain undulation and vegetation distribution differences under rainfall conditions, reducing the accuracy of experimental simulation. At the same time, it is difficult to accurately set different vibration frequencies, amplitudes, etc. at the toe, top, and both sides of the slope, resulting in difficulty in simulating the complex differences in the forces and responses of different parts during the propagation of seismic waves in an actual slope, further reducing the accuracy of the experiment. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. For this purpose, this application proposes an experimental device for simulating the instability mechanism of slopes under the coupled action of earthquakes and rainfall. The experimental device for simulating the instability mechanism of slopes under the coupled action of earthquakes and rainfall can accurately change the cooperation position and state of the cam and the vibration convex plate, thereby realizing precise adjustment of the vibration amplitudes at the toe, top, and both sides of the experimental model, meeting the requirements for simulating the slope vibration amplitude under different experimental conditions, and helping to deeply study the influence of the vibration amplitude on the slope instability mechanism. By flexibly controlling the rotation periods of multiple one-way long screws, the one-way long screws drive the corresponding circular one-way sliders, L-shaped plates, and water quantity control plates to move, which can effectively adjust the opening degree of the water passing holes, and then flexibly control the spraying intensities of the single first spraying plate and the single second spraying plate, enabling the simulation of the instability conditions of slopes at different positions and different rainfall intensities during the experiment.

[0005] According to the embodiment of this application, the experimental device for simulating the instability mechanism of slopes under the coupled action of earthquakes and rainfall includes:

[0006] Model storage mechanism;

[0007] Driving transmission mechanism, the transmission mechanism is located at the lower end of the model storage mechanism, and the transmission mechanism vibrates the models in the model storage mechanism;

[0008] Adjusting mechanism, the adjusting mechanism is located at the lower end of the model storage mechanism, the adjusting mechanism is located in the middle of the transmission mechanism, the transmission mechanism moves upward and drives the adjusting mechanism to rotate, and the adjusting mechanism can control the vibration amplitude of one side of the model and the water spraying amount;

[0009] Spraying mechanism, the spraying mechanism is located at the upper end of the model storage mechanism, and the adjusting mechanism controls the size of the spraying flow rate of the spraying mechanism during the rotation process.

[0010] According to some embodiments of the present application, the model storage mechanism includes a bottom plate, four corners of the upper surface of the bottom plate are fixedly connected with support legs, the upper surfaces of the support legs are fixedly connected with a connecting frame, the inner wall of the connecting frame is fixedly connected with a connecting cover, four corners of the inner bottom surface of the connecting cover are hinged with vibration springs, the upper ends of the vibration springs are hinged with a vibration plate, and an experimental model is arranged on the upper surface of the vibration plate.

[0011] According to some embodiments of the present application, drain valve pipes are respectively and communicatively connected to both sides of the front end and the rear end of the lower part of the connecting cover.

[0012] According to some embodiments of the present application, the transmission mechanism includes a servo motor, a lifting cylinder and a transmission frame, the servo motor is fixedly connected to the middle of the upper surface of the bottom plate, the output end of the servo motor is fixedly connected with a long rotating rod, a plurality of long clamping strips are fixedly connected to the outer wall of the long rotating rod near the upper part, the upper end of the long rotating rod extends into the inside of the connecting cover and is fixedly connected with a bevel gear, the middle parts of the inner walls of the front end and the rear end of the connecting cover are respectively rotatably connected with a middle rotating rod, the middle parts of the inner walls of both sides of the connecting cover are respectively rotatably connected with a short rotating rod, a plurality of short clamping strips are fixedly connected to the outer walls of the middle rotating rod and the short rotating rod far from the bevel gear, a clamping sleeve is slidably connected to the outer walls of the short clamping strips, cams are fixedly connected to the outer walls of the clamping sleeves near the bevel gear, a plurality of vibration convex plates are fixedly connected to the lower surfaces of the vibration plates, the cams cooperate with the vibration convex plates during the rotation process, and first bevel gears are fixedly connected to the outer walls of the middle rotating rod and the short rotating rod near the bevel gear, and the first bevel gears are meshed with the bevel gear;

[0013] One side of the upper surface of the rear end of the bottom plate is fixedly connected with a first water pump. The lifting cylinder is fixedly connected to the middle of the upper surface of the bottom plate. The water outlet of the first water pump is fixedly connected with a second connecting pipe. One end of the second connecting pipe away from the first water pump is connected to one side of the lower end of the lifting cylinder in a penetrating manner. A sealing slide plate is slidably connected to the inside of the lower end of the lifting cylinder. A plurality of downward pressing springs are fixedly connected to the edge of the inner top of the lifting cylinder. The lower surface of the downward pressing spring is fixedly connected with the upper surface of the sealing slide plate. The middle of the upper surface of the sealing slide plate is fixedly connected with a support rod. The upper end of the support rod extends to the upper part of the lifting cylinder and is fixedly connected with an assembly plate. The front end of the assembly plate is sleeved on the outer wall of a long rotating rod. The front end of the upper surface of the assembly plate is rotatably connected with a first transmission wheel. During the upward movement of the first transmission wheel, it is slidably connected to the outer wall of a long clamping strip. The rear end of the upper surface of the assembly plate is rotatably connected with a second transmission wheel. A toothed belt is sleeved on the outer walls of the first transmission wheel and the second transmission wheel. The upper surface of the second transmission wheel is fixedly connected with an intermediate gear.

[0014] The upper surface of the transmission frame is fixedly connected with the middle of the lower surface of the connection cover. A plurality of assembly rings are fixedly connected to the inner walls of the transmission frame. Bearing rings are fixedly connected to the inner walls of the assembly rings. Inner tooth rings are fixedly connected to the inner walls of the bearing rings. The intermediate gears are respectively meshed with the plurality of inner tooth rings.

[0015] According to some embodiments of the present application, during the rotation of the transfer rod, the clamping sleeve and the cam are driven to rotate through the short clamping strip

[0016] According to some embodiments of the present application, a water storage box is fixedly connected to the middle of the front end of the upper surface of the bottom plate. The water suction port of the first water pump is fixedly connected with a first connecting pipe. The front end of the first connecting pipe is connected to the lower end of one side of the water storage box in a penetrating manner.

[0017] According to some embodiments of the present application, the adjusting mechanism includes a first one-way long screw rod, a second one-way long screw rod, a third one-way long screw rod and a fourth one-way long screw rod. The first one-way long screw rod is rotatably connected to the rear end of the upper surface of the bottom plate. The third one-way long screw rod is rotatably connected to the front end of the upper surface of the bottom plate. The second one-way long screw rod and the fourth one-way long screw rod are respectively rotatably connected to both sides of the upper surface of the bottom plate. The lifting cylinder is located at the lower ends of the first one-way long screw rod, the second one-way long screw rod, the third one-way long screw rod and the fourth one-way long screw rod. A first driven gear is fixedly connected to the outer wall of the middle of the first one-way long screw rod. A second driven gear is fixedly connected to the outer wall of the second one-way long screw rod near the middle. A third driven gear is fixedly connected to the outer wall of the third one-way long screw rod near the upper part. A fourth driven gear is fixedly connected to the outer wall of the upper part of the fourth one-way long screw rod. The first driven gear, the second driven gear, the third driven gear and the fourth driven gear are respectively meshed with the inner tooth rings.

[0018] The upper ends of the first one-way long screw, the second one-way long screw, the third one-way long screw and the fourth one-way long screw all extend into the interior of the connection cover and are fixedly connected with second bevel gears. A plurality of one-way short screws are rotatably connected to the inner walls of the lower ends of the connection cover. Third bevel gears are fixedly connected to one ends of the one-way short screws close to the middle of the connection cover. The second bevel gears and the third bevel gears are meshed with each other. Circular one-way sliders are sleeved on the bodies of the one-way short screws close to the connection cover. Positioning sleeves are fixedly connected to the upper ends of the circular one-way sliders. The inner walls of the positioning sleeves are rotatably connected to the outer walls of the clamping sleeves.

[0019] According to some embodiments of the present application, the first driven gear is located below the second driven gear, the second driven gear is located below the third driven gear, and the third driven gear is located below the fourth driven gear.

[0020] According to some embodiments of the present application, the spraying mechanism includes a second water pump and an assembly frame. The second water pump is fixedly connected to the other side of the rear end of the upper surface of the bottom plate. A third connecting pipe is fixedly connected to the water suction port of the second water pump. One end of the third connecting pipe away from the second water pump is connected to the lower end of the lifting cylinder in a penetrating manner. An electromagnetic control valve is arranged on the body of the third connecting pipe. An annular water pipe is fixedly connected to the middle of the upper end of the bottom plate. A fourth connecting pipe is fixedly connected to the water outlet of the second water pump. The lower end of the fourth connecting pipe is connected to the annular water pipe in a penetrating manner;

[0021] Rectangular one-way sliders are sleeved on the bodies of the first one-way long screw, the second one-way long screw, the third one-way long screw and the fourth one-way long screw respectively. L-shaped plates are fixedly connected to the outer walls of the rectangular one-way sliders close to the middle of the bottom plate. A plurality of water quantity control boxes are fixedly connected to the middle of the upper surface of the bottom plate. A water quantity control plate is slidably connected to the middle of the water quantity control box. A plurality of water passing holes are formed in the body of the water quantity control plate. The upper end of the water quantity control plate extends to the outside of the water quantity control box. The upper surface of the water quantity control plate is fixedly connected to the lower surface of the L-shaped plate. A water inlet cavity is formed at one end of the water quantity control box away from the middle of the bottom plate. A water drainage cavity is formed at one end of the water quantity control box close to the middle of the bottom plate. A plurality of fifth connecting pipes are arranged on the body of the annular water pipe. The fifth connecting pipes all penetrate and extend into the interior of the water inlet cavity;

[0022] The assembly frame is fixedly connected to the upper surface of the connection cover. On both sides of the middle of the assembly frame, a first spray plate is fixedly connected respectively. At the front end and the rear end of the assembly frame, a second spray plate is fixedly connected respectively. The lower ends of the two water quantity control boxes are both connected with a first liquid transfer pipe in a penetrating manner. The lower ends of the first liquid transfer pipes respectively extend into the interiors of the two drainage cavities. The upper ends of the first liquid transfer pipes are respectively connected with the first spray plates in a penetrating manner. The lower ends of the water quantity control boxes at the front end and the rear end are both connected with a second liquid transfer pipe in a penetrating manner. The lower ends of the second liquid transfer pipes respectively extend into the drainage cavities at the front end and the rear end. The upper ends of the second liquid transfer pipes are respectively connected with the second spray plates in a penetrating manner.

[0023] According to some embodiments of the present application, a plurality of spray nozzles are connected to the lower ends of the first spray plate and the second spray plate in a penetrating manner.

[0024] The beneficial effects of the present application are as follows: During use, the power source of the transmission mechanism drives the transmission components to operate, causing the models in the model storage mechanism to vibrate. The adjustment mechanism is located at the lower end of the model storage mechanism and in the middle of the transmission mechanism. When the transmission mechanism moves upward, it drives the adjustment mechanism to rotate. On the one hand, the adjustment mechanism can change the vibration amplitude of multiple single sides of the model. On the other hand, it can control the spray flow rate of a single area of the spray mechanism, enabling the entire device to comprehensively simulate the effects of different earthquake intensities and rainfall intensities on the model, providing an effective means for studying the slope instability mechanism under the coupling action of earthquakes and rainfall. Among them, water is supplied into the lifting cylinder through the first water pump, and the servo motor is started. First, it can accurately change the matching position and state between the cam and the vibration convex plate, thereby realizing the precise adjustment of the vibration amplitudes at the toe, crest, and both sides of the experimental model slope, meeting the requirements for simulating the slope vibration amplitude under different experimental conditions, and helping to deeply study the influence of the vibration amplitude on the slope instability mechanism. Second, by flexibly controlling the rotation period of multiple one-way long screws, the one-way long screws drive the corresponding circular one-way sliders, L-shaped plates, and water quantity control plates to move, effectively adjusting the opening degree of the water passing holes, and then flexibly controlling the spray intensity of a single first spray plate and a single second spray plate, enabling the simulation of the slope instability conditions at different positions and different rainfall intensities during the experiment. Third, it can simultaneously simulate earthquake vibration and rainfall spraying, and can independently and precisely adjust the vibration amplitude and spray intensity respectively, thereby simulating the slope instability process under various coupling conditions of earthquakes and rainfall, more comprehensively reflecting the comprehensive effect of complex environmental factors on slope stability in actual geological disasters, and greatly improving the authenticity and effectiveness of the experiment. Fourth, under the same initial experimental simulation conditions, it can conduct multiple repeated experiments according to the set vibration amplitude and spray intensity parameters, and can conveniently compare the characteristics and laws of slope instability under different parameter combinations, which is beneficial for scientific researchers to obtain more accurate and reliable experimental data.

[0025] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present application. Description of the Drawings

[0026] To more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a three-dimensional structural schematic diagram of a simulation experimental device for slope instability mechanism under the coupling action of earthquake and rainfall according to an embodiment of the present application;

[0028] Figure 2 is a three-dimensional structural schematic diagram of a transmission mechanism, an adjustment mechanism, and a spraying mechanism according to an embodiment of the present application;

[0029] Figure 3 is a first view of a model storage mechanism according to an embodiment of the present application;

[0030] Figure 4 is a second view of a model storage mechanism according to an embodiment of the present application;

[0031] Figure 5 is an assembly drawing of a model storage mechanism and a transmission mechanism according to an embodiment of the present application;

[0032] Figure 6 is a three-dimensional structural schematic diagram of a transmission mechanism according to an embodiment of the present application;

[0033] Figure 7 is a partial assembly drawing of a transmission mechanism according to an embodiment of the present application;

[0034] Figure 8 is a first view of a transmission mechanism and an adjustment mechanism according to an embodiment of the present application;

[0035] Figure 9 is a sectional view of a lifting cylinder according to an embodiment of the present application;

[0036] Figure 10 is a second view of a transmission mechanism and an adjustment mechanism according to an embodiment of the present application;

[0037] Figure 11 is a three-dimensional structural schematic diagram of an adjustment mechanism according to an embodiment of the present application;

[0038] Figure 12 is a first view of a spraying mechanism according to an embodiment of the present application;

[0039] Figure 13 is the second view of the spraying mechanism according to the embodiment of the present application;

[0040] Figure 14 is a cross-sectional view of the water volume control box according to the embodiment of the present application.

[0041] Icons: 1. Model storage mechanism; 101. Bottom plate; 102. Support legs; 103. Connecting frame; 104. Connecting cover; 105. Vibration spring; 106. Vibration plate; 107. Experimental model; 108. Drain valve pipe; 2. Transmission mechanism; 201. Servo motor; 202. Long rotating rod; 203. Long clamping strip; 204. Bevel gear; 205. Intermediate rotating rod; 206. Short rotating rod; 207. Short clamping strip; 208. Clamping sleeve; 209. Cam; 210. Vibration convex plate; 211. First water pump; 212. First connecting pipe; 213. Second connecting pipe; 214. Water storage box; 215. Lifting cylinder; 216. Sealing slide plate; 217. Pressing spring; 218. Support rod; 219. Assembly plate; 220. First transmission wheel; 221. Second transmission wheel; 222. Intermediate gear; 223. Tooth belt; 224. Transmission frame; 225. Assembly ring; 226. Bearing ring; 227. Internal gear ring; 228. First bevel gear; 3. Adjusting mechanism; 301. First one-way long screw; 302. Second one-way long screw; 303. Third one-way long screw; 304. Fourth one-way long screw; 305. First driven gear; 306. Second driven gear; 307. Third driven gear; 308. Fourth driven gear; 309. Second bevel gear; 310. One-way short screw; 311. Third bevel gear; 312. Circular one-way slider; 313. Positioning sleeve; 4. Spraying mechanism; 401. Second water pump; 402. Third connecting pipe; 403. Electromagnetic control valve; 404. Annular water pipe; 405. Fourth connecting pipe; 406. Rectangular one-way slider; 407. L-shaped plate; 408. Water volume control box; 409. Fifth connecting pipe; 410. Water volume control plate; 411. Water passing hole; 412. Water inlet cavity; 413. Drainage cavity; 414. Assembly frame; 415. First spraying plate; 416. Second spraying plate; 417. First liquid transmission pipe; 418. Second liquid transmission pipe; 419. Spraying nozzle. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application.

[0043] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0044] Therefore, the detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0045] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application.

[0047] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more unless specifically defined otherwise.

[0048] In this application, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and diagonally above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and diagonally below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0050] The following describes a simulation experimental device for slope instability mechanism under the coupling action of earthquake and rainfall according to an embodiment of the present application with reference to the accompanying drawings.

[0051] As Figures 1 - 14 shown, the simulation experimental device for slope instability mechanism under the coupling action of earthquake and rainfall according to an embodiment of the present application includes: a model storage mechanism 1, a driving transmission mechanism 2, an adjustment mechanism 3, and a spraying mechanism 4.

[0052] As Figure 1 and Figure 2 shown, the model storage mechanism 1, the driving transmission mechanism 2, the transmission mechanism 2 is located at the lower end of the model storage mechanism 1, the transmission mechanism 2 vibrates the model in the model storage mechanism 1, the adjustment mechanism 3, the adjustment mechanism 3 is located at the lower end of the model storage mechanism 1, the adjustment mechanism 3 is located in the middle of the transmission mechanism 2, the transmission mechanism 2 moves upward and drives the adjustment mechanism 3 to rotate, the adjustment mechanism 3 can control the vibration amplitude of one side of the model and the water spraying amount, the spraying mechanism 4, the spraying mechanism 4 is located at the upper end of the model storage mechanism 1, and the adjustment mechanism 3 controls the size of the spraying flow rate of the spraying mechanism 4 during the rotation process.

[0053] During use, the power source of the transmission mechanism 2 drives the transmission components to operate, causing the model in the model storage mechanism 1 to vibrate. The adjustment mechanism 3 is located at the lower end of the model storage mechanism 1 and in the middle of the transmission mechanism 2. When the transmission mechanism 2 moves upward, it drives the adjustment mechanism 3 to rotate. The adjustment mechanism 3 can, on the one hand, change the vibration amplitude of multiple sides of the model, and on the other hand, control the spraying flow rate of a single area of the spraying mechanism 4, enabling the entire device to comprehensively simulate the influence of different earthquake intensities and rainfall intensities on the model, providing an effective means for studying the slope instability mechanism under the coupling action of earthquake and rainfall.

[0054] As Figure 3 and Figure 4As shown, the model storage mechanism 1 includes a bottom plate 101. Four corners of the upper surface of the bottom plate 101 are fixedly connected with support legs 102. The upper surface of the support legs 102 is fixedly connected with a connection frame 103. The inner wall of the connection frame 103 is fixedly connected with a connection cover 104. Four corners of the inner bottom surface of the connection cover 104 are hinged with vibration springs 105. The upper ends of the vibration springs 105 are hinged with a vibration plate 106. An experimental model 107 is arranged on the upper surface of the vibration plate 106. Drain valve pipes 108 are respectively and penetratingly connected to both sides of the front end and the rear end of the lower part of the connection cover 104.

[0055] As Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the transmission mechanism 2 includes a servo motor 201, a lifting cylinder 215 and a transmission frame 224. The servo motor 201 is fixedly connected to the middle of the upper surface of the bottom plate 101. The output end of the servo motor 201 is fixedly connected with a long rotating rod 202. A plurality of long clamping strips 203 are fixedly connected to the outer wall of the long rotating rod 202 near the upper part. The upper end of the long rotating rod 202 extends into the interior of the connection cover 104 and is fixedly connected with a bevel gear 204. The middle parts of the front and rear inner walls of the connection cover 104 are respectively rotatably connected with a middle rotating rod 205. The middle parts of the inner walls on both sides of the connection cover 104 are respectively rotatably connected with a short rotating rod 206. A plurality of short clamping strips 207 are fixedly connected to the outer walls of the middle rotating rod 205 and the short rotating rod 206 away from the bevel gear 204. The outer walls of the short clamping strips 207 are all slidably connected with a clamping sleeve 208. The outer walls of the clamping sleeves 208 near the bevel gear 204 are all fixedly connected with a cam 209. A plurality of vibration convex plates 210 are fixedly connected to the lower surface of the vibration plate 106. During the rotation of the cam 209, it cooperates with the vibration convex plates 210. A first bevel gear 228 is fixedly connected to the outer walls of the middle rotating rod 205 and the short rotating rod 206 near the bevel gear 204. The first bevel gears 228 are all meshed with the bevel gear 204. A first water pump 211 is fixedly connected to one side of the upper surface of the rear end of the bottom plate 101. The lifting cylinder 215 is fixedly connected to the middle of the upper surface of the bottom plate 101. The water outlet of the first water pump 211 is fixedly connected with a second connecting pipe 213. One end of the second connecting pipe 213 away from the first water pump 211 is connected to the side of the lower end of the lifting cylinder 215 in a penetrating manner. A sealing slide plate 216 is slidably connected to the interior of the lower end of the lifting cylinder 215. A plurality of downward pressure springs 217 are fixedly connected to the edge of the inner top of the lifting cylinder 215. The lower surface of the downward pressure springs 217 is fixedly connected with the upper surface of the sealing slide plate 216. The middle part of the upper surface of the sealing slide plate 216 is fixedly connected with a support rod 218. The upper end of the support rod 218 extends to the upper part of the lifting cylinder 215 and is fixedly connected with an assembly plate 219. The front end of the assembly plate 219 is sleeved on the outer wall of the long rotating rod 202. The front end of the upper surface of the assembly plate 219 is rotatably connected with a first transmission wheel 220. During the upward movement of the first transmission wheel 220, it is slidably connected to the outer wall of the long clamping strip 203. The rear end of the upper surface of the assembly plate 219 is rotatably connected with a second transmission wheel 221. A toothed belt 223 is sleeved on the outer walls of the first transmission wheel 220 and the second transmission wheel 221. The upper surface of the second transmission wheel 221 is fixedly connected with an intermediate gear 222. The upper surface of the transmission frame 224 is fixedly connected to the middle of the lower surface of the connection cover 104. A plurality of assembly rings 225 are fixedly connected to the inner walls of the transmission frame 224. Bearing rings 226 are fixedly connected to the inner walls of the assembly rings 225. Internal gear rings 227 are fixedly connected to the inner walls of the bearing rings 226. The intermediate gear 222 is respectively meshed with a plurality of internal gear rings 227. During the rotation of the middle rotating rod 205, the clamping sleeve 208 and the cam 209 are driven to rotate through the short clamping strip 207. A water storage box 214 is fixedly connected to the middle of the front end of the upper surface of the bottom plate 101.The water inlet of the first water pump 211 is fixedly connected with a first connecting pipe 212, and the front end of the first connecting pipe 212 is connected through to the lower end on one side of the water storage box 214.

[0056] Such as Figure 10 And Figure 11As shown, the adjusting mechanism 3 includes a first one-way long screw 301, a second one-way long screw 302, a third one-way long screw 303, and a fourth one-way long screw 304. The first one-way long screw 301 is rotatably connected to the rear end of the upper surface of the bottom plate 101, the third one-way long screw 303 is rotatably connected to the front end of the upper surface of the bottom plate 101, the second one-way long screw 302 and the fourth one-way long screw 304 are respectively rotatably connected to both sides of the upper surface of the bottom plate 101. The lifting cylinder 215 is located at the lower ends of the first one-way long screw 301, the second one-way long screw 302, the third one-way long screw 303, and the fourth one-way long screw 304. The outer wall of the middle part of the first one-way long screw 301 is fixedly connected with a first driven gear 305, the outer wall of the second one-way long screw 302 near the middle part is fixedly connected with a second driven gear 306, the outer wall of the third one-way long screw 303 near the upper part is fixedly connected with a third driven gear 307, and the outer wall of the upper part of the fourth one-way long screw 304 is fixedly connected with a fourth driven gear 308. The first driven gear 305, the second driven gear 306, the third driven gear 307, and the fourth driven gear 308 are respectively meshed with the internal gear ring 227. The upper ends of the first one-way long screw 301, the second one-way long screw 302, the third one-way long screw 303, and the fourth one-way long screw 304 all extend into the interior of the connecting cover 104 and are fixedly connected with a second bevel gear 309. The inner walls of the lower ends of the connecting cover 104 are all rotatably connected with a plurality of one-way short screws 310. One ends of the one-way short screws 310 near the middle of the connecting cover 104 are all fixedly connected with a third bevel gear 311. The second bevel gear 309 is meshed with the third bevel gear 311. Circular one-way sliders 312 are sleeved on the rod bodies of the one-way short screws 310 near the connecting cover 104. The upper ends of the circular one-way sliders 312 are all fixedly connected with positioning sleeves 313. The inner walls of the positioning sleeves 313 are rotatably connected with the outer walls of the clamping sleeves 208. The first driven gear 305 is located below the second driven gear 306, the second driven gear 306 is located below the third driven gear 307, and the third driven gear 307 is located below the fourth driven gear 308. Specifically, during the simulation experiment, when it is necessary to increase the vibration amplitude and spraying intensity of the toe of the experimental model 107, start the first water pump 211 and close the electromagnetic control valve 403. At this time, the first water pump 211 will pump water into the interior of the lifting cylinder 215 through the second connecting pipe 213. At this time, the water inside the lifting cylinder 215 pushes the sealing slide plate 216 to move upward, driving the support rod 218, the assembly plate 219, and the first transmission wheel 220, the second transmission wheel 221, the toothed belt 223, and the intermediate gear 222 above to move upward. At this time, the first transmission wheel 220 slides on the outer wall of the long clamping strip 203, and the intermediate gear 222 meshes with the internal gear ring 227 in turn during the upward movement. When the intermediate gear 222 moves upward to the horizontal position of the third driven gear 307, the first water pump 211 stops pumping water. At this time, the intermediate gear 222 will mesh with the third internal gear ring 227 from bottom to top.At this time, the servo motor 201 is started to make the long rotating rod 202 start to rotate. At this time, under the action of the long clamping strip 203, the first transmission wheel 220 can be rotated, and under the action of the toothed belt 223, the second transmission wheel 221 and the intermediate gear 222 are driven to rotate. At this time, the internal gear ring 227 at the corresponding position will rotate synchronously, thereby driving the third one-way long screw rod 303 to rotate. At this time, the third one-way long screw rod 303 will drive the second bevel gear 309 to rotate, and then through the meshing transmission with the third bevel gear 311, the one-way short screw rod 310 is rotated. At this time, the circular one-way slider 312 will drive the positioning sleeve 313 and the clamping sleeve 208 to slide on the outer wall of the short clamping strip 207. At this time, the matching position of the cam 209 and the vibration convex plate 210 also changes accordingly. Among them, the shape of the vibration convex plate 210 is small at one end close to the middle of the connecting cover 104 and large at one end far from the middle of the connecting cover 104. Therefore, when the cam 209 moves in the direction away from the middle of the connecting cover 104, the contact area between the cam 209 and the vibration convex plate 210 will increase. At the same time, during the process of the servo motor 201 driving the long rotating rod 202 to rotate, the bevel gear 204 will be engaged with the first bevel gear 228, and the middle rotating rod 205 and the short rotating rod 206 will drive the short clamping strip 207 to rotate respectively. At this time, the rotating short clamping strip 207 will drive the adjusted cam 209 to rotate. At this time, the purpose of adjusting the amplitude of the slope toe is achieved.

[0057] Such as Figure 12 , Figure 13 and Figure 14As shown, the spraying mechanism 4 includes a second water pump 401 and an assembly frame 414. The second water pump 401 is fixedly connected to the other side of the rear end of the upper surface of the bottom plate 101. A third connecting pipe 402 is fixedly connected to the water suction port of the second water pump 401. The end of the third connecting pipe 402 away from the second water pump 401 is connected through to the lower end of the lifting cylinder 215. An electromagnetic control valve 403 is provided on the pipe body of the third connecting pipe 402. A ring-shaped water pipe 404 is fixedly connected to the middle of the upper end of the bottom plate 101. A fourth connecting pipe 405 is fixedly connected to the water outlet of the second water pump 401. The lower end of the fourth connecting pipe 405 is connected through to the ring-shaped water pipe 404. Rectangular one-way sliders 406 are respectively sleeved on the lower ends of the rod bodies of the first one-way long screw 301, the second one-way long screw 302, the third one-way long screw 303, and the fourth one-way long screw 304. L-shaped plates 407 are fixedly connected to the outer walls of the rectangular one-way sliders 406 close to the middle of the bottom plate 101. A plurality of water quantity control boxes 408 are fixedly connected to the middle of the upper surface of the bottom plate 101. A water quantity control plate 410 is slidably connected to the middle of the water quantity control box 408. A plurality of water passing holes 411 are provided on the plate body of the water quantity control plate 410. The upper end of the water quantity control plate 410 extends to the outside of the water quantity control box 408. The upper surface of the water quantity control plate 410 is fixedly connected to the lower surface of the L-shaped plate 407. A water inlet cavity 412 is provided at one end of the water quantity control box 408 away from the middle of the bottom plate 101. A drainage cavity 413 is provided at one end of the water quantity control box 408 close to the middle of the bottom plate 101. A plurality of fifth connecting pipes 409 are provided on the pipe body of the ring-shaped water pipe 404. The fifth connecting pipes 409 all penetrate and extend into the interior of the water inlet cavity 412. The assembly frame 414 is fixedly connected to the upper surface of the connection cover 104. First spraying plates 415 are respectively fixedly connected to both sides of the middle of the assembly frame 414. Second spraying plates 416 are fixedly connected to the front end and the rear end of the assembly frame 414. First liquid transmission pipes 417 are respectively connected through to the lower ends of the water quantity control boxes 408 on both sides. The lower ends of the first liquid transmission pipes 417 respectively extend into the interior of the drainage cavities 413 on both sides. The upper ends of the first liquid transmission pipes 417 are respectively connected through to the first spraying plates 415. Second liquid transmission pipes 418 are respectively connected through to the lower ends of the water quantity control boxes 408 at the front end and the rear end. The lower ends of the second liquid transmission pipes 418 respectively extend into the interior of the drainage cavities 413 at the front end and the rear end. The upper ends of the second liquid transmission pipes 418 are respectively connected through to the second spraying plates 416. A plurality of spraying nozzles 419 are respectively connected through to the lower ends of the first spraying plates 415 and the second spraying plates 416. During the rotation of the third one-way long screw 303, the circular one-way slider 312 on the rod body will drive the L-shaped plate 407 to move upward. At this time, the water quantity control plate 410 will move upward synchronously, and the corresponding water passing holes 411 will move upward, and the opening degree of the water passing holes 411 will change, thereby realizing the preliminary adjustment of the spraying intensity. After the positions of the water quantity control plate 410 and the cam 209 are determined, then open the electromagnetic control valve 403 and turn on the second water pump 401.At this time, the water inside the lifting cylinder 215 is transported to the inside of the annular water pipe 404 through the third connecting pipe 402 and the fourth connecting pipe 405. At this time, the water inside the lifting cylinder 215 is pumped out, so that the sealing slide plate 216 will move downward and drive the assembly plate 219 to move downward synchronously until it returns to its original position. At this time, the first water pump 211 is turned on to continuously supply water to the inside of the lifting cylinder 215. Under the action of the second water pump 401 at this time, the continuously supplied water can be transported to the inside of the annular water pipe 404. At this time, the fifth connecting pipe 409 will transport the water to the water inlet cavity 412 of the water quantity control box 408. Since the position of the water quantity control plate 410 has been adjusted before and the opening degree of the water passing hole 411 has also been changed, the water entering the water inlet cavity 412 will enter the drainage cavity 413 through the water quantity control plate 410 according to the actual situation of the water passing hole 411. At this time, the water inside the water quantity control box 408 will be transported to the inside of the front second spray plate 416 through the second liquid transmission pipe 418 at the front end, and then spray precipitation on the surface of the experimental model 107 through the corresponding spray nozzles 419. At the same time, when the second water pump 401 is started, the water inside the annular water pipe 404 will also enter the water quantity control box 408 that has not adjusted the spray flow rate. At this time, the water inside the water quantity control box 408 will be transported to the inside of the two first spray plates 415 and the rear second spray plate 416 through the two first liquid transmission pipes 417 and the rear second liquid transmission pipe 418 on both sides respectively. At this time, the water sprayed inside the front second spray plate 416 will be greater than that of the rear second spray plate 416, and at the same time greater than the two first spray plates 415 on both sides, so as to realize the spraying operation on the toe of the experimental model 107 according to the adjusted spraying intensity, thus completing the whole simulation experiment process of increasing the vibration amplitude and spraying intensity of the toe. Among them, water is supplied to the inside of the lifting cylinder 215 through the first water pump 211, and the servo motor 201 is started. First, the matching position and state of the cam 209 and the vibration convex plate 210 can be accurately changed, so as to realize the precise adjustment of the vibration amplitudes of the toe, the top and both sides of the experimental model 107, meet the requirements of simulating the vibration amplitude of the slope under different experimental conditions, and help to deeply study the influence of the vibration amplitude on the slope instability mechanism. Second, by flexibly controlling the rotation period of multiple one-way long screws, the one-way long screws drive the corresponding circular one-way sliders 312, L-shaped plates 407 and water quantity control plates 410 to move, which can effectively adjust the opening degree of the water passing holes 411, and then flexibly control the spraying intensities of the single first spray plate 415 and the single second spray plate 416. This enables the simulation of the slope instability conditions at different positions and different rainfall intensities during the experiment. Third, it can simultaneously realize the simulation of seismic vibration and rainfall spraying, and can independently and precisely adjust the vibration amplitude and spraying intensity respectively, so as to simulate the slope instability process under various coupling conditions of earthquake and rainfall, and more comprehensively reflect the comprehensive effect of complex environmental factors in actual geological disasters on the slope stability, greatly improving the authenticity and effectiveness of the experiment.Fourthly, under the same initial experimental simulation conditions, multiple repeated experiments can be carried out according to the set vibration amplitude and spray intensity parameters, and the characteristics and laws of slope instability under different parameter combinations can be conveniently compared, which is conducive to scientific researchers obtaining more accurate and reliable experimental data.

[0058] Specifically, the working principle of the simulation experimental device for the slope instability mechanism under the coupling action of earthquake and rainfall: During the simulation experiment, when it is necessary to increase the vibration amplitude and spraying intensity at the toe of the experimental model 107, start the first water pump 211 and close the electromagnetic control valve 403. At this time, the first water pump 211 will pump water into the inside of the lifting cylinder 215 through the second connecting pipe 213. At this time, the water inside the lifting cylinder 215 pushes the sealing slide plate 216 to move upward, driving the support rod 218, the assembly plate 219 and the first driving wheel 220, the second driving wheel 221, the toothed belt 223 and the intermediate gear 222 above to move upward. At this time, the first driving wheel 220 slides on the outer wall of the long clamping strip 203, and the intermediate gear 222 meshes with the internal gear ring 227 in turn during the upward movement. When the intermediate gear 222 moves upward to the horizontal position of the third driven gear 307, the first water pump 211 stops pumping water. At this time, the intermediate gear 222 meshes with the third internal gear ring 227 from bottom to top. At this time, start the servo motor 201 to make the long rotating rod 202 start to rotate. At this time, under the action of the long clamping strip 203, the first driving wheel 220 can be rotated, and the second driving wheel 221 and the intermediate gear 222 are driven to rotate under the action of the toothed belt 223. At this time, the internal gear ring 227 at the corresponding position will rotate synchronously, driving the third one-way long screw rod 303 to rotate. At this time, the third one-way long screw rod 303 drives the second bevel gear 309 to rotate, and then through the meshing transmission with the third bevel gear 311, the one-way short screw rod 310 rotates. At this time, the circular one-way slider 312 drives the positioning sleeve 313 and the clamping sleeve 208 to slide on the outer wall of the short clamping strip 207. At this time, the matching position of the cam 209 and the vibration convex plate 210 also changes. Among them, the shape of the vibration convex plate 210 is small at one end close to the middle of the connecting cover 104 and large at one end far from the middle of the connecting cover 104. Therefore, when the cam 209 moves in the direction away from the middle of the connecting cover 104, the contact area between the cam 209 and the vibration convex plate 210 becomes more. At the same time, during the process of the servo motor 201 driving the long rotating rod 202 to rotate, the bevel gear 204 meshes with the first bevel gear 228, and the middle rotating rod 205 and the short rotating rod 206 drive the short clamping strip 207 to rotate respectively. At this time, the rotating short clamping strip 207 drives the cam 209 with the adjusted position to rotate. At this time, the purpose of adjusting the amplitude of the toe is achieved. When it is necessary to increase the vibration intensity, only need to increase the rotation speed of the servo motor 201, so that the contact times between the cam 209 and the vibration convex plate 210 become more to achieve. At the same time, during the rotation of the third one-way long screw rod 303, the circular one-way slider 312 on the rod body drives the L-shaped plate 407 to move upward. At this time, the water volume control plate 410 will move upward synchronously, and the corresponding water passing holes 411 will move upward, and the opening degree of the water passing holes 411 will change, thus realizing the preliminary adjustment of the spraying intensity. When the positions of the water volume control plate 410 and the cam 209 are determined,Then, turn on the electromagnetic control valve 403 and the second water pump 401. At this time, the water inside the lifting cylinder 215 is transported to the inside of the annular water pipe 404 through the third connecting pipe 402 and the fourth connecting pipe 405. At this time, the water inside the lifting cylinder 215 is pumped out, so that the sealing slide plate 216 will move downward and drive the assembly plate 219 to move downward synchronously until it returns to its original position. At this time, turn on the first water pump 211 to continuously supply water to the inside of the lifting cylinder 215. At this time, under the action of the second water pump 401, the continuously supplied water can be transported to the inside of the annular water pipe 404. At this time, the fifth connecting pipe 409 will transport the water to the water inlet cavity 412 of the water volume control box 408. Since the position of the water volume control plate 410 has been adjusted before and the opening degree of the water passing hole 411 has also changed, the water entering the water inlet cavity 412 will enter the drainage cavity 413 through the water volume control plate 410 according to the actual situation of the water passing hole 411. At this time, the water inside the water volume control box 408 will be transported to the inside of the front second spraying plate 416 through the second liquid transmission pipe 418 at the front end, and then spray and precipitate water on the surface of the experimental model 107 through the corresponding spray nozzles 419. At the same time, when the second water pump 401 is started, the water inside the annular water pipe 404 will also enter the water volume control box 408 whose spraying flow rate has not been adjusted. At this time, the water inside the water volume control box 408 will be transported to the inside of the two side first spraying plates 415 and the rear second spraying plate 416 through the two side first liquid transmission pipes 417 and the rear second liquid transmission pipe 418 respectively. At this time, the water sprayed inside the front second spraying plate 416 will be greater than that of the rear second spraying plate 416, and at the same time greater than that of the two side first spraying plates 415, thus realizing the operation of spraying the toe of the experimental model 107 according to the adjusted spraying intensity, and thus completing the entire simulation experiment process of increasing the vibration amplitude and spraying intensity of the toe.

[0059] It should be noted that the specific model specifications of the servo motor 201, the first water pump 211 and the second water pump 401 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0060] The power supply and principle of the servo motor 201, the first water pump 211 and the second water pump 401 are clear to those skilled in the art and will not be elaborated in detail here.

[0061] The above are only the embodiments of the present application and are not used to limit the protection scope of the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0062] The above are only the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A simulation experimental device for slope instability mechanism under the coupling action of earthquake and rainfall, characterized in that, Comprising: Model storage mechanism (1); Drive transmission mechanism (2), the transmission mechanism (2) is located at the lower end of the model storage mechanism (1), and the transmission mechanism (2) vibrates the models in the model storage mechanism (1); Adjustment mechanism (3), the adjustment mechanism (3) is located at the lower end of the model storage mechanism (1), the adjustment mechanism (3) is located in the middle of the transmission mechanism (2), the transmission mechanism (2) moves upward and drives the adjustment mechanism (3) to rotate, and the adjustment mechanism (3) can control the vibration amplitude on one side of the model and the water spraying amount; Spraying mechanism (4), the spraying mechanism (4) is located at the upper end of the model storage mechanism (1), and the adjustment mechanism (3) controls the size of the spraying flow rate of the spraying mechanism (4) during the rotation process; The model storage mechanism (1) includes a bottom plate (101), four corners of the upper surface of the bottom plate (101) are fixedly connected with support legs (102), the upper surfaces of the support legs (102) are fixedly connected with a connecting frame (103), the inner wall of the connecting frame (103) is fixedly connected with a connecting cover (104), four corners of the inner bottom surface of the connecting cover (104) are hingedly connected with vibration springs (105), the upper ends of the vibration springs (105) are hingedly connected with a vibration plate (106), an experimental model (107) is arranged on the upper surface of the vibration plate (106), the transmission mechanism (2) includes a servo motor (201), a lifting cylinder (215) and a transmission frame (224), the servo motor (201) is fixedly connected to the middle of the upper surface of the bottom plate (101), the output end of the servo motor (201) is fixedly connected with a long rotating rod (202), a plurality of long clamping strips (203) are fixedly connected to the outer wall of the long rotating rod (202) near the upper part, the upper end of the long rotating rod (202) extends into the interior of the connecting cover (104) and is fixedly connected with a bevel gear (204), the middle parts of the front and rear inner walls of the connecting cover (104) are respectively rotatably connected with a middle rotating rod (205), the middle parts of the two inner walls of the connecting cover (104) are respectively rotatably connected with a short rotating rod (206), a plurality of short clamping strips (207) are fixedly connected to the outer walls of the middle rotating rod (205) and the short rotating rod (206) away from the bevel gear (204), the outer walls of the short clamping strips (207) are all slidably connected with a clamping sleeve (208), a cam (209) is fixedly connected to the outer wall of the clamping sleeve (208) near the bevel gear (204), a plurality of vibration convex plates (210) are fixedly connected to the lower surface of the vibration plate (106), and the cam (209) cooperates with the vibration convex plates (210) during the rotation process, a first bevel gear (228) is fixedly connected to the outer walls of the middle rotating rod (205) and the short rotating rod (206) near the bevel gear (204), and the first bevel gears (228) are all meshed with the bevel gear (204); On one side of the upper surface of the rear end of the bottom plate (101), a first water pump (211) is fixedly connected. The lifting cylinder (215) is fixedly connected to the middle of the upper surface of the bottom plate (101). The water outlet of the first water pump (211) is fixedly connected to a second connecting pipe (213). One end of the second connecting pipe (213) far from the first water pump (211) is connected to one side of the lower end of the lifting cylinder (215) in a penetrating manner. Inside the lower end of the lifting cylinder (215), a sealing slide plate (216) is slidably connected. At the edge of the inner top of the lifting cylinder (215), a plurality of downward pressing springs (217) are fixedly connected. The lower surface of the downward pressing spring (217) is fixedly connected to the upper surface of the sealing slide plate (216). In the middle of the upper surface of the sealing slide plate (216), a support rod (218) is fixedly connected. The upper end of the support rod (218) extends to the upper part of the lifting cylinder (215) and is fixedly connected to an assembly plate (219). The front end of the assembly plate (219) is sleeved on the outer wall of the long rotating rod (202). On the front end of the upper surface of the assembly plate (219), a first transmission wheel (220) is rotatably connected. During the upward movement of the first transmission wheel (220), it is slidably connected to the outer wall of the long clamping strip (203). On the rear end of the upper surface of the assembly plate (219), a second transmission wheel (221) is rotatably connected. A toothed belt (223) is sleeved on the outer walls of the first transmission wheel (220) and the second transmission wheel (221). On the upper surface of the second transmission wheel (221), an intermediate gear (222) is fixedly connected; The upper surface of the transmission frame (224) is fixedly connected to the middle of the lower surface of the connection cover (104). On the inner walls of the transmission frame (224), a plurality of assembly rings (225) are fixedly connected. On the inner walls of the assembly rings (225), bearing rings (226) are fixedly connected. On the inner walls of the bearing rings (226), internal gear rings (227) are fixedly connected. The intermediate gear (222) meshes with the plurality of internal gear rings (227) respectively.

2. The slope instability mechanism simulation experiment device under the coupling action of earthquake and rainfall according to claim 1, characterized in that, On both sides of the front end and the rear end of the lower part of the connection cover (104), drain valve pipes (108) are respectively connected in a penetrating manner.

3. The slope instability mechanism simulation experimental device under the coupling action of earthquake and rainfall according to claim 1, characterized in that, During the rotation of the intermediate rotating rod (205), the clamping sleeve (208) and the cam (209) are driven to rotate through the short clamping strip (207).

4. The simulation experiment device for slope instability mechanism under the coupling action of earthquake and rainfall according to claim 1, characterized in that, In the middle of the front end of the upper surface of the bottom plate (101), a water storage box (214) is fixedly connected. The water suction port of the first water pump (211) is fixedly connected to a first connecting pipe (212). The front end of the first connecting pipe (212) is connected to the lower end of one side of the water storage box (214) in a penetrating manner.

5. The simulation experimental device for slope instability mechanism under the coupling action of earthquake and rainfall according to claim 1, characterized in that, The adjusting mechanism (3) includes a first one-way long screw rod (301), a second one-way long screw rod (302), a third one-way long screw rod (303) and a fourth one-way long screw rod (304). The first one-way long screw rod (301) is rotatably connected to the rear end of the upper surface of the bottom plate (101). The third one-way long screw rod (303) is rotatably connected to the front end of the upper surface of the bottom plate (101). The second one-way long screw rod (302) and the fourth one-way long screw rod (304) are respectively rotatably connected to both sides of the upper surface of the bottom plate (101). The lifting cylinder (215) is located at the lower ends of the first one-way long screw rod (301), the second one-way long screw rod (302), the third one-way long screw rod (303) and the fourth one-way long screw rod (304). An outer wall of the middle part of the first one-way long screw rod (301) is fixedly connected with a first driven gear (305). An outer wall of the second one-way long screw rod (302) near the middle part is fixedly connected with a second driven gear (306). An outer wall of the third one-way long screw rod (303) near the upper part is fixedly connected with a third driven gear (307). An outer wall of the upper part of the fourth one-way long screw rod (304) is fixedly connected with a fourth driven gear (308). The first driven gear (305), the second driven gear (306), the third driven gear (307) and the fourth driven gear (308) are respectively meshed with the internal gear ring (227). Upper ends of the first one-way long screw rod (301), the second one-way long screw rod (302), the third one-way long screw rod (303) and the fourth one-way long screw rod (304) all extend into the interior of the connection cover (104) and are fixedly connected with second bevel gears (309). Inner walls of the lower ends of the connection cover (104) are all rotatably connected with a plurality of one-way short screw rods (310). One ends of the one-way short screw rods (310) near the middle of the connection cover (104) are all fixedly connected with third bevel gears (311). The second bevel gears (309) are meshed with the third bevel gears (311). Circular one-way sliders (312) are sleeved on rod bodies of the one-way short screw rods (310) near the connection cover (104). Upper ends of the circular one-way sliders (312) are all fixedly connected with positioning sleeves (313). Inner walls of the positioning sleeves (313) are rotatably connected with outer walls of the ferrule (208).

6. The simulation experimental device for slope instability mechanism under the coupling action of earthquake and rainfall according to claim 5, characterized in that, The first driven gear (305) is located below the second driven gear (306). The second driven gear (306) is located below the third driven gear (307). The third driven gear (307) is located below the fourth driven gear (308).

7. The slope instability mechanism simulation experiment device under the coupling action of earthquake and rainfall according to claim 5, characterized in that, The spray mechanism (4) includes a second water pump (401) and an assembly frame (414). The second water pump (401) is fixedly connected to the other side of the rear end of the upper surface of the bottom plate (101). The water suction port of the second water pump (401) is fixedly connected with a third connecting pipe (402). One end of the third connecting pipe (402) far from the second water pump (401) is connected to the lower end of the lifting cylinder (215) in a penetrating manner. An electromagnetic control valve (403) is arranged on the pipe body of the third connecting pipe (402). The middle part of the upper end of the bottom plate (101) is fixedly connected with an annular water pipe (404). The water outlet of the second water pump (401) is fixedly connected with a fourth connecting pipe (405). The lower end of the fourth connecting pipe (405) is connected to the annular water pipe (404) in a penetrating manner; Rectangular one-way sliders (406) are respectively sleeved on the lower ends of the rod bodies of the first one-way long screw (301), the second one-way long screw (302), the third one-way long screw (303) and the fourth one-way long screw (304). L-shaped plates (407) are fixedly connected to the outer walls of the rectangular one-way sliders (406) close to the middle part of the bottom plate (101). A plurality of water quantity control boxes (408) are fixedly connected to the middle part of the upper surface of the bottom plate (101). A water quantity control plate (410) is slidably connected to the middle part of the water quantity control box (408). A plurality of water passing holes (411) are formed in the plate body of the water quantity control plate (410). The upper end of the water quantity control plate (410) extends to the outside of the water quantity control box (408). The upper surface of the water quantity control plate (410) is fixedly connected to the lower surface of the L-shaped plate (407). An inlet cavity (412) is formed at one end of the water quantity control box (408) far from the middle part of the bottom plate (101). A drainage cavity (413) is formed at one end of the water quantity control box (408) close to the middle part of the bottom plate (101). A plurality of fifth connecting pipes (409) are arranged on the pipe body of the annular water pipe (404). The fifth connecting pipes (409) all penetrate and extend into the interior of the inlet cavity (412); The assembly frame (414) is fixedly connected to the upper surface of the connection cover (104). The first spray plates (415) are respectively fixedly connected to both sides of the middle part of the assembly frame (414). The second spray plates (416) are respectively fixedly connected to the front end and the rear end of the assembly frame (414). The lower ends of both sides of the water quantity control boxes (408) are respectively connected to the inside of the drainage cavities (413) at both sides through first liquid transmission pipes (417). The upper ends of the first liquid transmission pipes (417) are respectively connected to the first spray plates (415) in a penetrating manner. The lower ends of the water quantity control boxes (408) at the front end and the rear end are respectively connected to the inside of the drainage cavities (413) at the front end and the rear end through second liquid transmission pipes (418). The upper ends of the second liquid transmission pipes (418) are respectively connected to the second spray plates (416) in a penetrating manner.

8. The simulation experimental device for slope instability mechanism under the coupling action of earthquake and rainfall according to claim 7, characterized in that, A plurality of spray nozzles (419) are connected through the lower ends of the first spray plate (415) and the second spray plate (416).

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