A slope angle dynamic adjustment test device and method suitable for high hypergravity

Abstract

The present invention discloses a slope angle dynamic adjustment test device and method suitable for high hypergravity. The model box support system and the angle adjustment system are both connected to an external hoisting base plate. The unstable model box is used to place the soil model. The unstable model box is hinged on the model box support system. The stacking model box is movably installed on the angle adjustment system. The unstable model box is overlapped on the stacking model box. The angle adjustment system is externally connected to the control system. The method includes assembling the device, placing the soil model in the unstable model box; hoisting the entire device into a geotechnical centrifuge to conduct a slope angle dynamic adjustment test under a hypergravity environment; in the slope angle dynamic adjustment test, the soil model in the unstable model box is observed, and then the destructive performance of the prototype soil sample under real working conditions at different slopes is restored. The present invention can reproduce the process of slope instability, sliding and deceleration accumulation, and has the characteristics of a large angle adjustment range, stable angle tilt rate and good controllability.

Description

Technical Field

[0001] The present invention belongs to the technical field of geotechnical engineering testing equipment, and in particular relates to a slope angle dynamic adjustment test device and method suitable for high hypergravity. Background Art

[0002] Loose accumulation slopes are prone to instability under heavy rainfall and external loads, reducing their shear strength and leading to overall instability. The instability of the landslide is highly fluid, destructive, and has a wide impact range. Physical experiments address the engineering problem of slope instability and failure, which is faced with complex and difficult triggering conditions, long sliding distances after failure, extremely high and difficult-to-restore stresses at the moment of instability and failure, and the difficulty of dynamically adjusting the slope angle under hypergravity. Therefore, it is crucial to simulate the stress conditions under hypergravity in hypergravity testing to trigger long-distance slope instability and sliding failure.

[0003] The slope angle adjustment device, which adjusts its angle in a hypergravity environment, can be used to study the seismic performance of tailings dams, underwater slope instability caused by static liquefaction, the shear properties of loose saturated sand, and the reconstructive sliding of landslides along the slide bed after slope instability. This device is particularly important for understanding slope instability mechanisms, developing disaster prevention and mitigation measures, and optimizing engineering design. Studying slope failure under different triggering modes can help reveal critical slope gradients, instability modes, and changes in soil mechanical properties. This can provide a scientific basis for slope design, reduce landslide risks, and offer targeted guidance for the design of reinforcement measures.

[0004] Existing slope inclination adjustment test devices under hypergravity have problems such as limited model adjustable angle (0-20°), low applicable hypergravity g value (below 15g, and the inclination angle change is achieved by motor drive, which is not suitable for high hypergravity, or hydraulic drive hydraulic cylinder tilt to withstand bending moment), complex experimental device and often rely on external oil source to achieve device lifting and lowering adjustment. Summary of the Invention

[0005] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide a slope angle dynamic adjustment test device and method suitable for high hypergravity, so as to overcome the problems in the prior art such as complex device structure, difficulty in monitoring the prototype test device, limited adjustable angle of the model in the model test device, difficult to control the inclination angle of the model box, complex experimental device and reliance on external oil source, and inability to trigger slope instability under high hypergravity.

[0006] The technical solution adopted in the present invention is:

[0007] 1. A dynamic slope angle adjustment test device suitable for high-gravity conditions:

[0008] It includes an unstable model box, a stacking model box, a model box support system and an angle adjustment system; the bottom ends of the model box support system and the angle adjustment system are fixedly connected to an external lifting base plate, the lifting base plate is placed in the hanging basket of the centrifuge, the unstable model box is used to place the soil model, the bottom end of the unstable model box can be hinged to the top of the model box support system in a swingable manner, the stacking model box can be installed on the angle adjustment system in a movable manner, the unstable model box is overlapped on the stacking model box, and the angle adjustment system is externally connected to the control system.

[0009] The angle adjustment system includes three guide column assemblies, three supporting oil cylinders, an oil cylinder clamp assembly, a synchronous oil drain valve, a hydraulic synchronizer and a supporting oil cylinder reset hydraulic pump;

[0010] The bottom ends of the guide column assembly and the support oil cylinder are vertically fixedly connected to the lifting base plate, the guide column assembly and the top of the support oil cylinder are connected by an oil cylinder clamp assembly, the rodless chambers of the three support oil cylinders are respectively connected to the upper oil chambers of the three independent oil chambers of the hydraulic synchronizer, the lower oil chambers of the three independent oil chambers of the hydraulic synchronizer are connected through the first plate ball valve and the synchronous oil drain valve, the rod chambers of the three support oil cylinders are connected to the support cylinder reset hydraulic pump, and the synchronous oil drain valve and the support cylinder reset hydraulic pump are connected to the hydraulic oil tank in the model box support system;

[0011] The top ends of the guide column assembly and the supporting cylinder are fixedly connected to the bottom end of the stacking model box. The angle adjustment system is used to accurately control the lifting and lowering of the stacking model box through the retractable supporting cylinder, and thereby accurately control the angle change value and angle change rate of the unstable model box connected to the stacking model box in a hypergravity environment.

[0012] The supporting oil cylinder reset hydraulic pump includes a second plate ball valve, a gear pump, a motor and a relief valve; the motor and the relief valve are both connected to the gear pump, the second plate ball valve is provided with three oil holes, the first oil hole of the second plate ball valve is connected to the independent rod chambers of the three supporting oil cylinders, the second oil hole of the second plate ball valve is connected to the hydraulic oil outlet of the gear pump, and the third oil hole of the second plate ball valve is connected to the hydraulic oil tank in the model box support system; the first plate ball valve is provided with three oil holes, the first oil hole of the first plate ball valve is connected to the lower oil chamber of the three independent oil chambers of the hydraulic synchronizer, the second oil hole of the first plate ball valve is connected to the hydraulic oil outlet of the gear pump, the third oil hole of the first plate ball valve is connected to the inlet of the synchronous oil drain valve, and the gear pump and the relief valve are both connected to the hydraulic oil tank in the model box support system.

[0013] The model box support system includes a rotating shaft, a bearing seat, an upper top plate, a guide column assembly, a height adjustment screw assembly and a hydraulic oil tank;

[0014] The bottom end of the hydraulic oil tank is fixedly connected to the lifting base plate, the bottom ends of the retractable guide column assembly and the height adjustment screw assembly are fixedly connected to the hydraulic oil tank, the top ends of the guide column assembly and the height adjustment screw assembly are fixedly connected to the lower surface of the upper top plate, the bearing seat is fixedly installed on the upper top plate, and the rotating shaft can be installed on the bearing seat so as to rotate around its own axis; the first model box bottom plate of the instability model box is hinged to the rotating shaft of the model box support system.

[0015] The instability model box comprises a rear baffle, a first observation window, a first model box bottom plate, two first model box side plates, an upper connecting plate, a transition plate and a transition plate rotating shaft; the bottom ends of the rear baffle and the two first model box side plates are fixedly connected to the first model box bottom plate, the two first model box side plates are relatively symmetrically arranged, and the two ends of the rear baffle are respectively connected to the two first model box side plates, the front top ends of the two first model box side plates are connected by an upper connecting plate, the front end of the first model box bottom plate is hinged to the transition plate through the transition plate rotating shaft, the soil model is placed on the first model box bottom plate, and the middle of the first model box side plate is provided with a first observation window for observing the soil model; the transition plate of the instability model box is overlapped at the opening position of the stacking model box;

[0016] A groove is provided in the middle of the bottom plate of the first model box, and the bottom plate of the first model box is hinged on the rotating shaft of the model box supporting system at the groove.

[0017] The stacking model box includes a second observation window, a second model box bottom plate, two second model box side plates and a front baffle; the bottom ends of the front baffle and the two second model box side plates are fixedly connected to the second model box bottom plate, the two second model box side plates are relatively symmetrically arranged, and the two ends of the front baffle are respectively connected to the two second model box side plates, and a second observation window for observing the soil model is provided in the middle of the second model box side plate;

[0018] The transition plate of the unstable model box is overlapped on the bottom plate of the second model box. The guide column assembly and the support cylinder in the angle adjustment system are fixedly connected to the lower surface of the bottom plate of the second model box. The angle adjustment system is used to adjust the height of the stacked model box, thereby changing the inclination angle of the unstable model box overlapped on the stacked model box.

[0019] An instability model box in the angle adjustment system is provided with an inclination sensor, and the inclination sensor and the support oil cylinder reset hydraulic pump are both externally connected to the control system.

[0020] 2. A test method for dynamic slope angle adjustment suitable for high hypergravity, comprising the following steps:

[0021] Step S1, model making: placing a soil model in an unstable model box. After the soil model is made, the unstable model box is installed on a model box support system;

[0022] Step S2: Hanging the device into the basket of a geotechnical centrifuge to conduct a slope angle dynamic adjustment test under a hypergravity environment;

[0023] Step S3: Observe the soil model in the instability model box in the slope angle dynamic adjustment test to obtain the failure performance of the soil model under different slopes, and then restore the failure performance of the prototype soil sample under real working conditions under different slopes.

[0024] The step S2 is specifically as follows:

[0025] First, the lifting base plate with the test device installed is hoisted into the centrifuge as a whole and fixed. Under normal gravity, two of the three oil holes in the first plate ball valve and the second plate ball valve are controlled to be conductive. The centrifuge is started, and the centrifugal acceleration of the centrifuge is gradually increased to the preset Ng and maintained for the preset time. At the same time, the oil discharge speed of the synchronous oil discharge valve is controlled to make the piston rod of the supporting cylinder move up and down. The piston rod of the supporting cylinder drives the stacking model box to move up and down synchronously, thereby changing the inclination angle of the unstable model box and the soil model. Then, the destructive performance of the soil model is observed at different inclination angles.

[0026] In step S2, the specific method of controlling two of the three oil holes in the first plate ball valve and the second plate ball valve to be open so that the piston rod of the supporting oil cylinder moves up and down is:

[0027] When the device is subjected to a dynamic slope angle adjustment test in a hypergravity environment of g<Ng<15g: the oil through hole connected to the lower oil chamber of the hydraulic synchronizer and the oil through hole connected to the synchronous oil drain valve in the first plate-type ball valve are connected, and the oil through hole connected to the rod chamber of the support oil cylinder and the oil through hole connected to the gear pump in the second plate-type ball valve are connected, so that the hydraulic oil in the rodless chamber of the support oil cylinder flows to the upper oil chamber of the hydraulic synchronizer, and the hydraulic oil in the lower oil chamber of the hydraulic synchronizer flows to the synchronous oil drain valve through the first plate-type ball valve and flows back to the hydraulic oil tank, thereby causing the piston rod of the support oil cylinder to descend;

[0028] When the device is subjected to a dynamic slope angle adjustment test in a hypergravity environment of Ng≥15g: the oil through hole in the first plate ball valve connected to the lower oil chamber of the hydraulic synchronizer and the oil through hole connected to the synchronous oil drain valve are connected, and the oil through hole in the second plate ball valve connected to the rod chamber of the support cylinder and the oil through hole connected to the hydraulic oil tank are connected, so that the hydraulic oil in the rodless chamber of the support cylinder flows to the upper oil chamber of the hydraulic synchronizer, and the hydraulic oil in the lower oil chamber of the hydraulic synchronizer flows to the synchronous oil drain valve through the first plate ball valve and flows back to the hydraulic oil tank, thereby causing the piston rod of the support cylinder to descend;

[0029] When the device is reset under normal gravity environment: the oil through hole connected to the hydraulic synchronizer and the oil through hole connected to the gear pump in the first plate ball valve are connected, and the oil through hole connected to the supporting oil cylinder and the oil through hole connected to the hydraulic oil tank in the second plate ball valve are connected, so that the hydraulic oil enters the lower oil chamber of the hydraulic synchronizer through the first plate ball valve from the gear pump, and the hydraulic oil in the upper oil chamber of the hydraulic synchronizer flows back to the rodless chambers of the three supporting oil cylinders, and the piston rods of the supporting oil cylinders are lifted upward, thereby realizing the angular reset of the unstable model box and the stacking model box.

[0030] The hydraulic principle of the angle adjustment system is as follows:

[0031] The inclination adjustment of the instability model box under hypergravity is controlled by draining oil from a synchronized oil drain valve. Designed and manufactured to equalize the cross-sectional areas of the three supporting cylinders and the three hydraulic oil chambers of the hydraulic synchronizer, the system controls the simultaneous lowering of the three supporting cylinders, achieving mechanically forced, synchronized lowering. The system eliminates the need for servo and proportional valves, ensuring structural reliability under high hypergravity accelerations (Ng). The angle adjustment system not only synchronizes the three supporting cylinders but also eliminates the need for a power source to drain the oil, utilizing the device's own gravity under hypergravity. The supporting oil cylinder is always in a vertical arrangement state during the change of the angle of the unstable model box, which weakens the influence of high supergravity, regards the weight of the model box under high supergravity as the load of the supporting oil cylinder, increases the internal pressure of the hydraulic system, and the system oil pressure becomes higher with the increase of the supergravity g value, so that the lowering adjustment of the supporting oil cylinder to cause the inclination angle of the unstable model box to change under high supergravity is more effective and simple; there is no deformation of the piston rod due to its own gravity, no creeping or jamming, and it avoids the generation of extremely large eccentric load friction on the piston, which affects the stability of the device.

[0032] The entire angle adjustment system features a reliable structure, precise valve opening control, and controllable support cylinder descent speed. The angle adjustment system can be charged and discharged through the opening and closing of each manual plate-type ball valve in combination with a one-way oil pump, facilitating experiments. The angle adjustment system utilizes a fully enclosed oil supply and discharge method, ensuring that the oil and air are isolated and the elastic modulus remains unchanged. This also ensures that there is no air in the support cylinders, ensuring that the three support cylinders operate in unison during experiments.

[0033] The support cylinder has two oil chambers: a rodless chamber and a rod chamber. The hydraulic synchronizer has six independent oil chambers divided by three pistons, and each independent oil chamber of the hydraulic synchronizer has equal cross-section. The plate-type ball valve is a two-position, three-way valve that can manually select two of the three oil passage holes in the plate-type ball valve. The synchronous oil drain valve can drive the valve core through the action of the motor reducer, thereby changing the oil flow cross-section of the valve core in the synchronous oil drain valve to change the hydraulic oil flow in the angle adjustment system's oil drain line, thereby changing the oil drain speed of the three lower chambers of the hydraulic synchronizer. Furthermore, the oil inlet speed of the three independent upper chambers of the hydraulic synchronizer can be changed, thereby precisely changing the descent speed of the three support cylinders.

[0034] When the device operates centrifugally in a low hypergravity acceleration environment (Ng), the second plate-type ball valve connects the rod chambers of the three support cylinders to the high-pressure hydraulic oil outlet of the gear pump, while the first plate-type ball valve connects the three independent lower chambers of the hydraulic synchronizer to the hydraulic oil inlet of the synchronized oil drain valve. Because the stacking model box is loaded on the upper portion of the support cylinder's piston rod, back pressure is generated in the upper portion of the support cylinder's rod chamber and the pressurized hydraulic oil provided by the support cylinder reset hydraulic pump. This forces the hydraulic oil in the rodless chamber of the support cylinder to flow to the three independent upper chambers of the hydraulic synchronizer. The hydraulic oil in the three independent lower chambers of the hydraulic synchronizer then flows through the first plate-type ball valve to the inlet of the synchronized oil drain valve, where it is released to control the flow of hydraulic oil and ultimately returns to the hydraulic tank. This in turn controls the descent speed of the support cylinder, and therefore the rate of change in the inclination angle of the destabilizing model box, ultimately decreasing the height of the stacking model box and increasing the angle of the destabilizing model box.

[0035] When the device is centrifugally operating in an environment with a high hypergravity acceleration value Ng, the second plate-type ball valve connects the rod chambers of the three support cylinders to the hydraulic pipelines of the hydraulic oil tank, while the first plate-type ball valve connects the three independent lower chambers of the hydraulic synchronizer to the hydraulic oil inlet of the synchronous oil release valve. Because the stacking model box load is located above the piston rod of the support cylinder, back pressure is generated in the rodless chamber of the support cylinder, causing the hydraulic oil in the rodless chamber of the support cylinder to flow to the three independent upper chambers of the hydraulic synchronizer. The hydraulic oil in the three independent lower chambers of the hydraulic synchronizer flows through the first plate-type ball valve to the inlet of the synchronous oil release valve. The oil is released through the synchronous oil release valve to control the flow of the hydraulic oil, and finally returns to the hydraulic oil tank. This in turn controls the descending speed of the support cylinder, ultimately causing the height of the stacking model box to decrease and the angle of the unstable model box to increase.

[0036] When the device is operating in a normal gravity reset environment, the second plate-type ball valve connects the three support cylinder rod chambers to the hydraulic oil tank, while the first plate-type ball valve connects the three independent lower chambers of the hydraulic synchronizer to the high-pressure hydraulic oil outlet of the gear pump. Hydraulic oil flows through the high-pressure hydraulic oil outlet of the gear pump and then through the first plate-type ball valve into the three independent lower chambers of the hydraulic synchronizer. The hydraulic oil in these independent lower chambers pushes the synchronizer piston upward, and the hydraulic oil in the three independent upper chambers of the hydraulic synchronizer flows back into the lower chambers of the three support cylinders, pushing the support cylinder piston rods upward. This ultimately raises the height of the stacked model box and resets the angle of the unstable model box.

[0037] The angle change design of the unstable model box of the device of the present invention is designed using the seesaw principle. The rotation fulcrum of the unstable model box is located behind the center of mass of the unstable model box itself. The front of the unstable model box is overlapped on the upper surface of the stacking model box. The unstable model box can rotate itself only by its own gravity, and the pressure on the stacking model box is relatively small. There are three supporting cylinders under the stacking model box and three guide column structures to ensure the stability of the stacking model box structure. The overall device can adjust the initial angle of the unstable model box by lifting the model box support system, and the dynamic adjustment of the slope angle is achieved by mechanically forcing the synchronous descent of the stacking model box by the three supporting cylinders.

[0038] The device is suitable for use in high-gravity environments. The three supporting cylinders are positioned vertically to mitigate the effects of hypergravity, protecting them from bending moments. The weight of the model box under high hypergravity acts as a load on the supporting cylinders, increasing the internal pressure of the hydraulic system. As the g-value of hypergravity increases, the system's oil pressure increases, effectively resisting hypergravity. Furthermore, geometric decoupling is employed to mechanically force the three cylinders to descend synchronously, changing the slope angle and ensuring the stability of the device. The device operates under hypergravity conditions with a full load of 150g and an empty load of 300g. The device can adjust the tilt angle of the device and apply various external influencing factors to study the instability and failure modes of slope models, the seismic performance of tailings dams, the shear properties of loose saturated sand, and the sliding process of landslide bodies along the slide bed. This experimental device can help researchers simulate natural or engineered slope disasters in the laboratory, helping to reveal the instability-sliding dynamic transformation mechanism during high-slope instability and damage disasters, and providing theoretical support and technical verification for the prediction, assessment, and control of large-scale slope disasters.

[0039] The beneficial effects of the present invention are:

[0040] 1. The device of the present invention can be used to study the failure mechanism of slopes under high hypergravity with different slope angles, the influence of different slope change rates on slope liquefaction instability, and the shear characteristics of saturated sand. This provides a reliable basis for the optimization of engineering design, slope reinforcement schemes, and early warning systems, and provides an in-depth understanding of the physical and mechanical properties of soil particles and the instability laws of slopes under prototype sites, thereby improving the safety and reliability of slope engineering design.

[0041] 2. The hydraulic support cylinder and hydraulic synchronizer in the device of the present invention are arranged vertically, which weakens the influence of hypergravity. The weight of the model box under hypergravity is regarded as the load of the support cylinder, increasing the internal pressure of the hydraulic system. As the hypergravity g value increases, the system oil pressure becomes higher, and the control angle performance is optimized and stable and reliable. At the same time, it can avoid the piston from being subjected to unbalanced load friction under high hypergravity, and is equipped with a guide column for impact resistance, and is applicable to high hypergravity conditions up to 300g.

[0042] 3. The present invention combines manual adjustment under normal gravity with adjustment by a supergravity control system. The angle of the unstable chute can be adjusted from 0 to 30 degrees. The angle adjustment range is large, and the angle tilt rate is stable and controllable. The device of the present invention has a simple and reliable structure and can achieve dynamic adjustment of the slope angle under supergravity by relying on its own weight without the help of an external oil source.

[0043] 4. The device of the present invention can truly restore the prototype stress conditions of the slope and can truly reproduce the instability and destruction movement process. The test repeatability is good at the model scale and can reproduce the process of slope instability, sliding and deceleration accumulation. The present invention is used to simulate the disaster process of natural or engineered slopes, serve to reveal the instability-sliding dynamic transformation mechanism during the instability and destruction of high slopes, and provide theoretical support and technical verification for the prediction, evaluation and control of large-scale slope disasters. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a schematic diagram of the slope angle dynamic adjustment device of the present invention;

[0045] Figure 2 is a schematic diagram of the angle adjustment system;

[0046] Figure 3 It is a schematic diagram of the hydraulic synchronization principle in the angle adjustment system;

[0047] Figure 4 This is the principle diagram of the hydraulic system when the device is working centrifugally;

[0048] Figure 5 This is the principle diagram of the hydraulic system when the device is shut down and reset;

[0049] Figure 6 is a schematic diagram of the model box support system;

[0050] Figure 7 is a schematic diagram of the instability model box;

[0051] Figure 8 is a schematic diagram of stacked model boxes;

[0052] Figure 9 is a schematic diagram of angle adjustment according to an embodiment of the present invention;

[0053] Figure 10It is a three-dimensional perspective view of the overall device of the present invention.

[0054] In the figure: 1. Instability model box; 2. Stacking model box; 3. Model box support system; 4. Angle adjustment system; 1.1-Rear baffle; 1.2-First observation window; 1.3-First model box bottom plate; 1.4-First model box side plate; 1.6-Upper connecting plate; 1.7-Transition plate; 1.8-Transition plate rotation axis; 2.2, Second observation window; 2.3, Second model box bottom plate; 2.4, Second model box side plate; 2.6, Front baffle; 3.1, Rotation axis; 3.2, Bearing seat; 3.3, upper top plate; 3.4, guide column assembly; 3.5, height adjustment screw assembly; 3.6, hydraulic oil tank; 4.1, guide column assembly; 4.2, support cylinder; 4.3, cylinder clamp assembly; 5.1, synchronous oil drain valve; 5.2, hydraulic synchronizer; 6.2, pressure sensor; 6.3, first plate ball valve; 6.4, second plate ball valve; 6.5, gear pump; 6.6, motor; 6.7, overflow valve; 6.8, support cylinder reset hydraulic pump. DETAILED DESCRIPTION

[0055] The present invention is described in detail below with reference to specific implementation cases. The following implementation cases will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form.

[0056] like Figure 1 As shown, the device includes an unstable model box 1, a stacking model box 2, a model box support system 3 and an angle adjustment system 4; the bottom ends of the model box support system 3 and the angle adjustment system 4 are fixedly connected to the external lifting base plate, the lifting base plate is placed in the hanging basket of the centrifuge, the unstable model box 1 is used to place the soil model, the bottom end of the unstable model box 1 can be hinged to the top of the model box support system 3 so as to swing up and down, the stacking model box 2 can be installed on the angle adjustment system 4 so as to move up and down, the unstable model box 1 is overlapped on the stacking model box 2, and the angle adjustment system 4 is externally connected to the control system.

[0057] Both the unstable model box 1 and the stacking model box 2 are provided with openings. The opening of the unstable model box 1 is used as the front direction of the device, and the opening of the stacking model box 2 is located in the rear direction of the device. The opening of the unstable model box 1 is placed on the upper surface of the opening of the stacking model box 2. The angle adjustment system 4 is used to control the up and down movement of the stacking model box 2. When the stacking model box 2 moves up and down, the front of the unstable model box 1 moves up and down synchronously with the stacking model box 2, thereby changing the inclination angle of the unstable model box 1.

[0058] like Figure 2 As shown, the angle adjustment system 4 includes three retractable guide column assemblies 4.1, three supporting oil cylinders 4.2, an oil cylinder clamp assembly 4.3, a synchronous oil discharge valve 5.1, a hydraulic synchronizer 5.2 and a supporting oil cylinder reset hydraulic pump 6.8;

[0059] The bottom ends of the guide column assembly 4.1 and the supporting oil cylinder 4.2 are both vertically fixedly connected to the hoisting base plate. The tops of the guide column assembly 4.1 and the supporting oil cylinder 4.2 housings are connected via the oil cylinder clamp assembly 4.3. The guide column assembly 4.1 and the supporting oil cylinder 4.2 are arranged alternately. Figure 3 As shown, the rodless chambers of the three support cylinders 4.2 are respectively connected to the upper oil chambers of the three independent oil chambers of the hydraulic synchronizer 5.2. The lower oil chambers of the three independent oil chambers of the hydraulic synchronizer 5.2 are all connected through the first plate ball valve 6.3 and the synchronous oil discharge valve 5.1. The rod chambers of the three support cylinders 4.2 are all connected to the support cylinder reset hydraulic pump 6.8. The outlet of the synchronous oil discharge valve 5.1 and the support cylinder reset hydraulic pump 6.8 are both connected to the hydraulic oil tank 3.6 in the model box support system 3.

[0060] The top ends of the guide column assembly 4.1 and the supporting cylinder 4.2 are fixedly connected to the bottom end of the stacking model box bottom plate 2.3 in the stacking model box 2. The angle adjustment system 4 is used to accurately control the lifting and lowering of the stacking model box 2 through the retractable supporting cylinder 4.2, and then accurately control the angle change value and angle change rate of the unstable model box 1 overlapped on the stacking model box 2 in a hypergravity environment. The supporting cylinder 4.2 is also used to support the weight of the unstable model box 1 and the stacking model box 2.

[0061] like Figure 4 As shown, the support cylinder reset hydraulic pump 6.8 includes a second plate ball valve 6.4, a gear pump 6.5, a motor 6.6 and a relief valve 6.7; the motor 6.6 and the relief valve 6.7 are both connected to the gear pump 6.5, and the second plate ball valve 6.4 is provided with three oil holes. The first oil hole of the second plate ball valve 6.4 is connected to the independent rod chambers of the three support cylinders 4.2, the second oil hole of the second plate ball valve 6.4 is connected to the high-pressure hydraulic oil outlet of the gear pump 6.5, and the third oil hole of the second plate ball valve 6.4 is connected to the support oil outlet of the model box. The hydraulic oil tank 3.6 in the support system 3 is connected; the first plate ball valve 6.3 is provided with three oil holes, the first oil hole of the first plate ball valve 6.3 is connected to the lower oil chamber of the three independent oil chambers of the hydraulic synchronizer 5.2, the second oil hole of the first plate ball valve 6.3 is connected to the high-pressure hydraulic oil outlet of the gear pump 6.5, the third oil hole of the first plate ball valve 6.3 is connected to the inlet of the synchronous oil drain valve 5.1, and the hydraulic inlet and outlet of the gear pump 6.5 and the overflow valve 6.7 are all connected to the hydraulic oil tank 3.6 in the model box support system 3.

[0062] The guide column assembly 4.1 and the support cylinder 4.2 are both vertically mounted on the lifting base plate. The guide column assembly 4.1 is used to ensure that the stacking model box 2 is vertical during the lifting process, and can withstand a certain horizontal impact load when the test soil model is destroyed and impacted. The angle adjustment system 4 mainly changes the initial angle of the unstable model box 1 by changing the center of gravity height of the stacking model box 2, thereby achieving angle adjustment of the unstable model box 1. The angle adjustment of the unstable model box 1 is automatic adjustment under hypergravity, the angle change range is 0~15°, and the angle adjustment speed is controllable. The angle adjustment system 4 is mainly used for angle adjustment under high hypergravity. In a specific embodiment, high hypergravity specifically refers to hypergravity with an acceleration value greater than 15g.

[0063] Pressure sensors 6.2 can be installed on the pipes connecting the support cylinder 4.2 and the hydraulic synchronizer 5.2, the pipes connecting the hydraulic synchronizer 5.2 and the first plate-type ball valve 6.3, and the pipes connecting the first plate-type ball valve 6.3 and the gear pump 6.5. The hydraulic oil tank 3.6 in the model box support system 3 is responsible for storing the oil needed to supply and discharge the hydraulic synchronizer 5.2. The support cylinder reset hydraulic pump 6.8 is connected to the lower oil chamber of the three independent oil chambers of the hydraulic synchronizer 5.2 through the first plate-type ball valve 6.3. The piston of the hydraulic synchronizer 5.2 pushes upward, pushing the oil in the upper chamber of the three independent oil chambers of the hydraulic synchronizer 5.2 back to the three support cylinders 4.2, controlling the piston rods of the three support cylinders 4.2 to rise and reset the device.

[0064] like Figure 6 As shown, the model box support system 3 includes a rotating shaft 3.1, a bearing seat 3.2, an upper top plate 3.3, a guide column assembly 3.4, a height adjustment screw assembly 3.5 and a hydraulic oil tank 3.6;

[0065] The bottom end of the hydraulic oil tank 3.6 is fixedly connected to the lifting base plate, the bottom ends of the retractable guide column assembly 3.4 and the retractable height adjustment screw assembly 3.5 are both fixedly connected to the hydraulic oil tank 3.6, the top ends of the guide column assembly 3.4 and the height adjustment screw assembly 3.5 are both fixedly connected to the lower surface of the upper top plate 3.3, the height adjustment screw assembly 3.5 is located between the two guide column assemblies 3.4, the bearing seat 3.2 is fixedly mounted on the upper top plate 3.3, and the rotating shaft 3.1 can be mounted on the bearing seat 3.2 so as to rotate around its own axis; the first model box bottom plate 1.3 of the unstable model box 1 is hinged to the rotating shaft 3.1 of the model box support system 3, so that the unstable model box 1 can swing up and down relative to the model box support system 3.

[0066] The model box support system 3 is mainly used to manually adjust the height of the support point of the unstable model box 1, thereby changing the inclination angle of the unstable model box 1. The angle change range is 0~15°. The angle adjustment range under supergravity is 0~15°, and the total angle adjustment range is 0-30°.

[0067] like Figure 7 As shown, the instability model box 1 includes a rear baffle 1.1, a first observation window 1.2, a first model box bottom plate 1.3, two first model box side plates 1.4, an upper connecting plate 1.6, a transition plate 1.7 and a transition plate rotation axis 1.8; the bottom ends of the rear baffle 1.1 and the two first model box side plates 1.4 are fixedly connected to the first model box bottom plate 1.3, the two first model box side plates 1.4 are relatively symmetrically arranged, and the left and right ends of the rear baffle 1.1 are respectively connected to the two first model box side plates 1.4 The front top ends of the two first model box side panels 1.4 are connected by an upper connecting plate 1.6. The front end of the first model box bottom panel 1.3 is hinged to the transition panel 1.7 via a transition panel rotation axis 1.8. The soil model is placed on the first model box bottom panel 1.3. A first observation window 1.2 for observing the soil model is provided in the middle of the first model box side panel 1.4. The transition panel 1.7 of the unstable model box 1 is overlapped at the opening of the stacking model box 2 to facilitate the destruction of the soil model and its entry into the stacking model box 2.

[0068] A groove is provided in the middle of the first model box bottom plate 1.3, which is hinged to the shaft 3.1 of the model box support system 3 at the groove. The groove of the first model box bottom plate 1.3 is parallel to the axial direction of the shaft 3.1.

[0069] The instability model box 1 is used to stack soil models during simulation tests. The front of the instability model box 1 is attached to the upper surface of the second model box bottom plate 2.3 of the stacking model box 2. The angle of the instability model box 1 can be adjusted via an angle adjustment system 4, thereby changing the angle of the soil model. A rear baffle 1.1 is installed at the rear end of the instability model box 1. The front end of the instability model box 1 can be left unprotected, forming an opening in the instability model box 1, allowing the soil model to fall from the opening into the stacking model box 2.

[0070] like Figure 8 As shown, the stacking model box 2 includes a second observation window 2.2, a second model box bottom plate 2.3, two second model box side plates 2.4 and a front baffle 2.6; the bottom ends of the front baffle 2.6 and the two second model box side plates 2.4 are fixedly connected to the second model box bottom plate 2.3, the two second model box side plates 2.4 are relatively symmetrically arranged, and the left and right ends of the front baffle 2.6 are respectively connected to the two second model box side plates 2.4, and the middle of the second model box side plates 2.4 is provided with a second observation window 2.2 for observing the soil model;

[0071] The transition plate 1.7 of the unstable model box 1 is overlapped on the bottom plate 2.3 of the second model box. The guide column assembly 4.1 and the support cylinder 4.2 in the angle adjustment system 4 are fixedly connected to the lower surface of the bottom plate 2.3 of the second model box. The angle adjustment system 4 is used to adjust the height of the stacking model box 2, thereby changing the inclination angle of the unstable model box 1 overlapped on the stacking model box 2.

[0072] Specifically, the stacking model box 2 is used to accumulate the soil impacted from the instability model box 1 during the slope instability sliding test, and can rise and fall with the action of the angle adjustment system 4, thereby changing the inclination angle of the instability model box 1 overlapped on the upper surface of the stacking model box 2.

[0073] An inclination sensor is provided in the instability model box 1 in the angle adjustment system 4, a pressure sensor 6.2 is provided on the support cylinder 4.2, a valve core displacement sensor is provided on the synchronous oil release valve 5.1, and the support cylinder 4.2, the inclination sensor, the pressure sensor 6.2, the valve core displacement sensor and the motor 6.6 in the support cylinder reset hydraulic pump 6.8 in the angle adjustment system 4 are externally connected to the control system.

[0074] The embodiment of the present invention includes the following steps:

[0075] Step S1, model making: placing a soil model in the instability model box 1. After the soil model making is completed, the instability model box 1 is installed on the model box support system 3;

[0076] Step S2: Hang the device into the basket of the geotechnical centrifuge, connect the inclination sensor, pressure sensor 6.2, and valve core displacement sensor in the device to the external control system, and conduct a slope angle dynamic adjustment test under a hypergravity environment. Figure 9 As shown;

[0077] Step S3: In the slope angle dynamic adjustment test, the soil models in the instability model box 1 and the stacking model box 2 are observed to obtain the failure performance of the soil models under different slopes, and then restore the failure performance of the prototype soil samples under real working conditions under different slopes.

[0078] Step S2 is specifically as follows:

[0079] like Figure 10As shown, first, the hoisting base plate with the test device installed is hoisted into the centrifuge as a whole and fixed. Under normal gravity, two of the three oil holes in the first plate ball valve 6.3 and the second plate ball valve 6.4 are controlled by an external control system to be open. The centrifuge is started, and the centrifugal acceleration of the centrifuge is gradually increased to a preset Ng and maintained for a preset time. By controlling the oil release speed of the synchronous oil release valve 5.1, the piston rod of the supporting cylinder 4.2 is made to move up and down accurately at a preset speed. The piston rod of the supporting cylinder 4.2 drives the stacking model box 2 to move up and down synchronously, thereby changing the inclination angle of the instability model box 1 and the soil model. Then, the destructive performance of the soil model is observed at different inclination angles.

[0080] In step S2, the specific method of controlling two of the three oil holes in the first plate ball valve 6.3 and the second plate ball valve 6.4 to be open so that the piston rod of the support cylinder 4.2 moves up and down is as follows:

[0081] like Figure 4 As shown, when the device is conducting a slope angle dynamic adjustment test in a hypergravity environment where g < Ng < 15g: the oil hole in the first plate-type ball valve 6.3, which is connected to the lower oil chamber of the three independent oil chambers of the hydraulic synchronizer 5.2, and the oil hole connected to the synchronous oil drain valve 5.1, are connected. The oil hole in the second plate-type ball valve 6.4, which is connected to the independent rod chambers of the three support cylinders 4.2, and the oil hole connected to the gear pump 6.5, are connected. This allows the hydraulic oil in the rodless chamber of the support cylinder 4.2 to flow to the upper oil chamber of the hydraulic synchronizer 5.2, and the hydraulic oil in the lower oil chamber of the hydraulic synchronizer 5.2 to flow through the first plate-type ball valve 6.3 to the synchronous oil drain valve 5.1 and back to the hydraulic oil tank 3.6, thereby causing the piston rod of the support cylinder 4.2 to descend. Wherein, g represents the acceleration due to normal gravity; N represents the ratio of centrifugal acceleration to gravitational acceleration in the hypergravity environment.

[0082] When the device was tested for dynamic slope angle adjustment in a hypergravity environment with Ng ≥ 15g, the following procedures were followed: The oil hole in the first plate-type ball valve 6.3, connected to the lower oil chamber of the three independent oil chambers of the hydraulic synchronizer 5.2, was connected to the oil hole connected to the synchronized oil drain valve 5.1. The oil hole in the second plate-type ball valve 6.4, connected to the independent rod chambers of the three support cylinders 4.2, was connected to the oil hole connected to the hydraulic oil tank 3.6. This allowed the hydraulic oil in the rodless chambers of the support cylinders 4.2 to flow into the upper oil chamber of the hydraulic synchronizer 5.2. The hydraulic oil in the lower oil chamber of the hydraulic synchronizer 5.2 flowed through the first plate-type ball valve 6.3 to the synchronized oil drain valve 5.1 and back into the hydraulic oil tank 3.6, thereby lowering the piston rod of the support cylinder 4.2.

[0083] like Figure 5As shown, when the device is reset under normal gravity environment: the oil hole in the first plate ball valve 6.3 connected to the lower oil chamber of the three independent oil chambers of the hydraulic synchronizer 5.2 and the oil hole connected to the gear pump 6.5 are connected, and the oil hole in the second plate ball valve 6.4 connected to the independent rod chambers of the three supporting cylinders 4.2 and the oil hole connected to the hydraulic oil tank 3.6 are connected, so that the hydraulic oil flows from the gear pump 6.5 through the first plate ball valve 6.3 into the lower oil chamber of the hydraulic synchronizer 5.2, and the hydraulic oil in the upper oil chamber of the hydraulic synchronizer 5.2 flows back to the rodless chambers of the three supporting cylinders 4.2, and the piston rods of the supporting cylinders 4.2 are lifted upward, thereby realizing the angular reset of the unstable model box 1 and the stacking model box 2.

[0084] Specifically, the oil release speed of the synchronous oil release valve 5.1 precisely controls the descending speed of the piston rod of the support cylinder 4.2. If the entire test apparatus is tested under low-g conditions (less than 15g centrifugal force), the load on the support cylinder 4.2 caused by centrifugal force is small, and the hydraulic pressure in the rodless chamber of the support cylinder is low, which is not conducive to the oil release control of the synchronous oil release valve 5.1. Consider connecting a gear pump 6.5 to increase the system pressure of the upper chamber of the support cylinder during low-g tests, increasing the load on the support cylinder 4.2 and thereby increasing the hydraulic system pressure in the oil release circuit of the synchronous oil release valve 5.1, facilitating the oil release of the synchronous oil release valve 5.1. If the entire test apparatus is tested under high-g conditions, the load on the support cylinder caused by centrifugal force is large, and the hydraulic pressure in the rodless chamber of the support cylinder is high, the gear pump 6.5 is not required. The rod chamber of the support cylinder 4.1 can be directly connected to the hydraulic oil tank 3.6 through the second plate-type ball valve 6.4.

[0085] The core function of this device is the angle adjustment of the unstable model box 1, of which 0-15° is manually adjustable, and the subsequent 15° is controlled in real time by the angle adjustment system 4. The adjustable angle within 0-15° of the unstable model box 1 is achieved by manually adjusting the height of the model box support system 3. The adjustment process is achieved by manually rotating the nut sleeve to change the lifting and lowering of the height adjustment screw assembly 3.5 to adjust the extension and retraction of the stud, thereby adjusting the height of the model box support system 3, and then changing the initial angle of the unstable model box 1. During the test, the subsequent 15° adjustment method after the centrifuge test is turned on is mainly achieved by the action of the three synchronous support cylinders 4.2 at the bottom of the stacking model box 2. By the piston rods of the three synchronous support cylinders 4.2 descending, the front end of the unstable model box 1 descends synchronously, and the angle of the unstable model box 1 is further changed. The inclination angle of the soil model is controlled by the inclination angle of the unstable model box 1 to simulate the slope of the prototype soil sample.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A slope angle dynamic adjustment test device suitable for high hypergravity, characterized by: The invention comprises an instability model box (1), a stacking model box (2), a model box support system (3) and an angle adjustment system (4); the bottom ends of the model box support system (3) and the angle adjustment system (4) are fixedly connected to an external hoisting base plate, the hoisting base plate is placed in the hanging basket of the centrifuge, the instability model box (1) is used to place the soil model, the bottom end of the instability model box (1) is hinged to the top end of the model box support system (3) in a manner that it can swing up and down, the stacking model box (2) is installed on the angle adjustment system (4) in a manner that it can move up and down, the instability model box (1) is overlapped on the stacking model box (2), and the angle adjustment system (4) is externally connected to the control system; The angle adjustment system (4) comprises three guide column assemblies (4.1), three supporting oil cylinders (4.2), an oil cylinder clamp assembly (4.3), a synchronous oil discharge valve (5.1), a hydraulic synchronizer (5.2) and a supporting oil cylinder reset hydraulic pump (6.8); the bottom ends of the guide column assembly (4.1) and the supporting oil cylinder (4.2) are vertically fixedly connected to the lifting base plate, the tops of the guide column assembly (4.1) and the supporting oil cylinder (4.2) are connected via the oil cylinder clamp assembly (4.3), the rodless chambers of the three supporting oil cylinders (4.2) are respectively connected to the upper oil chambers of the three independent oil chambers of the hydraulic synchronizer (5.2), and the lower oil chambers of the three independent oil chambers of the hydraulic synchronizer (5.2) are connected via the first A plate-type ball valve (6.3) is connected to a synchronous oil drain valve (5.1), the rod chambers of the three supporting oil cylinders (4.2) are all connected to a supporting oil cylinder reset hydraulic pump (6.8), and the synchronous oil drain valve (5.1) and the supporting oil cylinder reset hydraulic pump (6.8) are all connected to a hydraulic oil tank (3.6) in the model box support system (3); the top ends of the guide column assembly (4.1) and the supporting oil cylinder (4.2) are fixedly connected to the bottom end of the stacking model box (2), and the angle adjustment system (4) is used to control the lifting and lowering of the stacking model box (2) through the retractable supporting oil cylinder (4.2), thereby controlling the angle change value and angle change rate of the unstable model box (1) connected to the stacking model box (2) in a hypergravity environment; The supporting oil cylinder reset hydraulic pump (6.8) comprises a second plate-type ball valve (6.4), a gear pump (6.5), a motor (6.6) and a relief valve (6.7); the motor (6.6) and the relief valve (6.7) are both connected to the gear pump (6.5); the second plate-type ball valve (6.4) is provided with three oil holes, the first oil hole of the second plate-type ball valve (6.4) is connected to the independent rod chambers of the three supporting oil cylinders (4.2); the second oil hole of the second plate-type ball valve (6.4) is connected to the hydraulic oil outlet of the gear pump (6.5); the third oil hole of the second plate-type ball valve (6.4) is connected to the oil outlet of the gear pump (6.5); The first plate-type ball valve (6.3) is connected to the hydraulic oil tank (3.6) in the model box support system (3); the first plate-type ball valve (6.3) is provided with three oil holes, the first oil hole of the first plate-type ball valve (6.3) is connected to the lower oil chamber of the three independent oil chambers of the hydraulic synchronizer (5.2), the second oil hole of the first plate-type ball valve (6.3) is connected to the hydraulic oil outlet of the gear pump (6.5), the third oil hole of the first plate-type ball valve (6.3) is connected to the inlet of the synchronous oil drain valve (5.1), and the gear pump (6.5) and the overflow valve (6.7) are both connected to the hydraulic oil tank (3.6) in the model box support system (3); The cross-sectional areas of the three supporting oil cylinders (4.2) are equal to the cross-sectional areas of the three hydraulic oil chambers of the hydraulic synchronizer (5.2).

2. The slope angle dynamic adjustment test device suitable for high hypergravity according to claim 1, characterized in that: The model box support system (3) includes a rotating shaft (3.1), a bearing seat (3.2), an upper top plate (3.3), a guide column assembly (3.4), a height adjustment screw assembly (3.5) and a hydraulic oil tank (3.6); The bottom end of the hydraulic oil tank (3.6) is fixedly connected to the lifting base plate, the bottom ends of the telescopic guide column assembly (3.4) and the height adjustment screw assembly (3.5) are fixedly connected to the hydraulic oil tank (3.6), the top ends of the guide column assembly (3.4) and the height adjustment screw assembly (3.5) are fixedly connected to the lower surface of the upper top plate (3.3), the bearing seat (3.2) is fixedly installed on the upper top plate (3.3), and the rotating shaft (3.1) is installed on the bearing seat (3.2) so as to be rotatable around its own axis; the first model box bottom plate (1.3) of the instability model box (1) is hinged to the rotating shaft (3.1) of the model box support system (3).

3. The slope angle dynamic adjustment test device suitable for high hypergravity according to claim 1, characterized in that: The instability model box (1) comprises a rear baffle (1.1), a first observation window (1.2), a first model box bottom plate (1.3), two first model box side plates (1.4), an upper connecting plate (1.6), a transition plate (1.7), and a transition plate rotation axis (1.8); The bottom ends of the rear baffle (1.1) and the two first model box side panels (1.4) are fixedly connected to the first model box bottom panel (1.3), the two first model box side panels (1.4) are relatively symmetrically arranged, and the two ends of the rear baffle (1.1) are respectively connected to the two first model box side panels (1.4), the front top ends of the two first model box side panels (1.4) are connected via an upper connecting plate (1.6), and the front end of the first model box bottom panel (1.3) is connected via a transition plate rotation axis (1.8 ) is hinged to the transition plate (1.7), the soil model is placed on the first model box bottom plate (1.3), and a first observation window (1.2) for observing the soil model is provided in the middle of the first model box side plate (1.4); the transition plate (1.7) of the unstable model box (1) is overlapped at the opening position of the stacking model box (2); a groove is provided in the middle of the first model box bottom plate (1.3), and the first model box bottom plate (1.3) is hinged to the rotating shaft (3.1) of the model box support system (3) at the groove.

4. The slope angle dynamic adjustment test device suitable for high hypergravity according to claim 1, characterized in that: The stacking model box (2) comprises a second observation window (2.2), a second model box bottom plate (2.3), two second model box side plates (2.4) and a front baffle (2.6); the bottom ends of the front baffle (2.6) and the two second model box side plates (2.4) are fixedly connected to the second model box bottom plate (2.3), the two second model box side plates (2.4) are relatively symmetrically arranged, and the two ends of the front baffle (2.6) are respectively connected to the two second model box side plates (2.4); a second observation window (2.2) for observing the soil model is provided in the middle of the second model box side plates (2.4); The transition plate (1.7) of the instability model box (1) is overlapped on the second model box bottom plate (2.3), and the guide column assembly (4.1) and the supporting oil cylinder (4.2) in the angle adjustment system (4) are fixedly connected to the lower surface of the second model box bottom plate (2.3). The angle adjustment system (4) is used to adjust the height of the stacking model box (2), thereby changing the inclination angle of the instability model box (1) overlapped on the stacking model box (2).

5. The slope angle dynamic adjustment test device suitable for high hypergravity according to claim 1, characterized in that: An instability model box (1) in the angle adjustment system (4) is provided with an inclination sensor, and the inclination sensor and the support cylinder reset hydraulic pump (6.8) are both externally connected to a control system.

6. A test method for dynamic slope angle adjustment suitable for high hypergravity, applied to the device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step S1, model making: placing a soil model in an unstable model box (1), and after the soil model making is completed, installing the unstable model box (1) on a model box support system (3); Step S2: Hanging the device into the basket of a geotechnical centrifuge to conduct a slope angle dynamic adjustment test under a hypergravity environment; Step S3: In the slope angle dynamic adjustment test, the soil model in the instability model box (1) is observed to obtain the failure performance of the soil model under different slopes, and then restore the failure performance of the prototype soil sample under real working conditions under different slopes.

7. The method for dynamic slope angle adjustment test applicable to high hypergravity according to claim 6, characterized in that: The step S2 is specifically as follows: First, the hoisting base plate with the test device installed is hoisted into the centrifuge as a whole and fixed, and two of the three oil holes in the first plate ball valve (6.3) and the second plate ball valve (6.4) are controlled to be conductive under normal gravity, and the centrifuge is started. The centrifugal acceleration of the centrifuge is gradually increased to a preset Ng and maintained for a preset time. At the same time, the oil release speed of the synchronous oil release valve (5.1) is controlled to make the piston rod of the supporting cylinder (4.2) move up and down, and the piston rod of the supporting cylinder (4.2) drives the stacking model box (2) to move up and down synchronously, thereby changing the inclination angle of the unstable model box (1) and the soil model, and then observing the destructive performance of the soil model at different inclination angles.

8. The method for dynamic slope angle adjustment test applicable to high hypergravity according to claim 7, characterized in that: In step S2, the specific method of controlling two of the three oil holes in the first plate-type ball valve (6.3) and the second plate-type ball valve (6.4) to be connected so as to cause the piston rod of the supporting oil cylinder (4.2) to move up and down is as follows: When the device is subjected to a dynamic slope angle adjustment test in a hypergravity environment of g < Ng < 15g: the oil hole connected to the hydraulic synchronizer (5.2) and the oil hole connected to the synchronous oil drain valve (5.1) in the first plate-type ball valve (6.3) are connected, and the oil hole connected to the support oil cylinder (4.2) and the oil hole connected to the gear pump (6.5) in the second plate-type ball valve (6.4) are connected, so that the hydraulic oil in the rodless chamber of the support oil cylinder (4.2) flows to the upper oil chamber of the hydraulic synchronizer (5.2), and the hydraulic oil in the lower oil chamber of the hydraulic synchronizer (5.2) flows through the first plate-type ball valve (6.3) to the synchronous oil drain valve (5.1) and flows back to the hydraulic oil tank (3.6), thereby causing the piston rod of the support oil cylinder (4.2) to descend; When the device is subjected to a dynamic slope angle adjustment test in a hypergravity environment of Ng≥15g: the oil hole connected to the hydraulic synchronizer (5.2) and the oil hole connected to the synchronous oil drain valve (5.1) in the first plate-type ball valve (6.3) are connected, and the oil hole connected to the support oil cylinder (4.2) and the oil hole connected to the hydraulic oil tank (3.6) in the second plate-type ball valve (6.4) are connected, so that the hydraulic oil in the rodless chamber of the support oil cylinder (4.2) flows to the upper oil chamber of the hydraulic synchronizer (5.2), and the hydraulic oil in the lower oil chamber of the hydraulic synchronizer (5.2) flows through the first plate-type ball valve (6.3) to the synchronous oil drain valve (5.1) and flows back to the hydraulic oil tank (3.6), thereby causing the piston rod of the support oil cylinder (4.2) to descend; When the device is reset in a normal gravity environment: the oil hole connected to the hydraulic synchronizer (5.2) and the oil hole connected to the gear pump (6.5) in the first plate-type ball valve (6.3) are connected, and the oil hole connected to the support oil cylinder (4.2) and the oil hole connected to the hydraulic oil tank (3.6) in the second plate-type ball valve (6.4) are connected, so that the hydraulic oil flows from the gear pump (6.5) through the first plate-type ball valve (6.3) into the lower oil chamber of the hydraulic synchronizer (5.2), and the hydraulic oil in the upper oil chamber of the hydraulic synchronizer (5.2) flows back to the rodless chambers of the three support oil cylinders (4.2), and the piston rods of the support oil cylinders (4.2) are lifted upward, thereby achieving the angular reset of the instability model box (1) and the stacking model box (2).

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