Rainfall type large-scale landslide physical simulation test device and method

Abstract

The invention discloses a rainfall-type large-scale landslide physical simulation test device and method, and relates to the technical field of landslide simulation tests, the rainfall-type large-scale landslide physical simulation test device comprises a test cabin capable of rotating to adjust an inclination angle; the soil filling platform is rotationally arranged in the test cabin and is used for simulating a landslide; the electric push cylinder is assembled in the test cabin in a hinged mode through a supporting column, the output end of the electric push cylinder is arranged at the bottom of the soil filling platform in a hinged mode, and the electric push cylinder can drive the soil filling platform to rotate in the test cabin, so that the slipped landslide base material moves and resets to the initial position; the earth ramming assembly is used in cooperation with the test cabin and used for ramming the soil on the earth filling platform to form a simulated landslide mass; the rainfall assembly is used in cooperation with the test cabin and used for simulating rainfall on the landslide mass on the soil filling platform, so that use of landslide mass materials can be reduced, the soil filling workload of workers is reduced, and meanwhile starting of the next test is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of landslide simulation test, and more specifically to a rainfall-type large-scale landslide physical simulation test device and method. Background Art

[0002] Landslide is a common and serious geological disaster. It refers to the phenomenon that soil or rock on a slope slides downward as a whole or in part under the action of gravity along a certain weak surface or weak zone under the influence of multiple factors such as rainfall, river scouring, groundwater activity, rainwater soaking, earthquakes and artificial slope cutting.

[0003] Landslide physical simulation tests are widely used in landslide initiation mechanism, landslide stability analysis, failure process simulation, prediction and forecasting, and engineering practice guidance. For example, through landslide physical model tests, we can deeply study the formation mechanism of landslides, deformation and failure process, and reinforcement effect of reinforcement measures, providing a scientific basis for landslide prevention and control.

[0004] When conducting soil landslide simulation tests in different regions, in order to ensure the consistency and comparability of the tests, we uniformly selected the same soil base material as the test basis. Whenever a set of landslide simulation tests (soil in a specific area) is completed, the test platform needs to be prepared to receive the next set of landslide materials (representing different areas). In this conversion stage, the basic materials left on the platform have the value of reuse, but due to the tilting operation characteristics of the test cabin design, these materials often shift in position. In order to reduce material waste and maintain test efficiency, most of the staff use tools to flatten the shifted basic materials to ensure that the platform surface is flat and prepare for the subsequent material filling. However, although this operation is effective, it also invisibly increases the workload of the staff. Based on this, we provide a rainfall-type large-scale landslide physical simulation test device and method. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a rainfall-type large-scale landslide physical simulation test device and method.

[0006] The rainfall-type large-scale landslide physical simulation test device and method provided by the present invention adopt the following technical solutions:

[0007] A rainfall-type large-scale landslide physical simulation test device comprises a test cabin capable of rotating to adjust the inclination angle; a filling platform rotatably arranged inside the test cabin for simulating landslide; an electric push cylinder hingedly assembled inside the test cabin through a support, and the output end of the electric push cylinder is hingedly arranged at the bottom of the filling platform, the electric push cylinder can drive the filling platform to rotate in the test cabin, so that the landslide base material after sliding is moved and reset to the initial position; a ramming component, used in conjunction with the test cabin, for tamping the soil on the filling platform to form a simulated landslide body; a rainfall component, used in conjunction with the test cabin, for simulating rainfall on the landslide body on the filling platform.

[0008] Preferably, the filling platform is rotatably assembled in the test chamber via a rotating shaft, two track grooves are provided on the inner wall of the test chamber, sliding shafts are fixedly connected to both sides of the filling platform, and the two sliding shafts are slidably arranged in the corresponding track grooves.

[0009] Preferably, an electric push rod is installed on the side of the test chamber and at the top of the track groove, and the output end of the electric push rod is equipped with a plug rod. A socket is opened at the side end of the sliding shaft. When the filling platform is horizontal with respect to the test chamber, the plug rod corresponds to the position of the socket on the sliding shaft, and the plug rod can be plugged into the socket.

[0010] Preferably, a pair of vibration plates are mounted inside the test chamber via a bracket, and the two vibration plates are symmetrically arranged on both sides of the electric push cylinder.

[0011] Preferably, the vibration plate is arranged at an angle, and the bottom of the filling platform can fit the vibration plate.

[0012] Preferably, one side of the test cabin is hinged on an external base, and the other side of the test cabin is hingedly equipped with two hydraulic push cylinders. The side of the test cabin is also equipped with a control sensor and a pressure- and flow-stabilizing CNC metering oil source pump station for controlling the two hydraulic push cylinders to ensure that the progress of the two hydraulic push cylinders is consistent, thereby ensuring the balance of both sides of the test cabin.

[0013] Preferably, sensors are provided on the filling platform for detecting the real-time status of the landslide body. The sensors are electrically connected to an external control system, and the detected data are fed back to the external control system for analysis, and relevant curves are drawn to ultimately form a landslide stability analysis and early warning model; the sensors include inclination moisture content sensors, displacement sensors, rainfall sensors, soil pressure sensors, pore water pressure sensors, video monitoring sensors, and emission sensors.

[0014] Preferably, the rammed earth assembly includes a supporting movable mechanism, a supporting member is slidably provided on the top of the supporting movable mechanism, a left-right movable mechanism is fixedly provided on the top of the supporting member, and a tamping member for tamping and fastening the landslide is mounted on the side of the left-right movable mechanism.

[0015] Preferably, the rainfall assembly includes a horizontal plate, the top of which is equipped with a vertical plate through a support rod, an electric telescopic rod is fixedly installed at the bottom center of the vertical plate, the output end of the electric telescopic rod is rotatably connected to a mounting plate, and a spray piece is installed at the side end of the mounting plate.

[0016] The test method of the rainfall-type large-scale landslide physical simulation test device has the following specific steps:

[0017] S1. Use landslide soil formed by different geological causes, place it on the top of the filling platform, and tamp the soil through the tamping assembly to make the soil in the test cabin reach the density of the original soil, so as to construct a simulated landslide body;

[0018] S2. Then, the test chamber is rotated by the hydraulic push cylinder to simulate the slope of the landslide in the natural state, and according to the preset rainfall conditions, the rainfall component is used to simulate rainfall on the landslide on the fill platform, and then the soil pressure value, pore water pressure value and volume water content value in the test body are collected by the soil pressure gauge, pore water pressure gauge and volume water content sensor, and the curve model of the relevant parameters is drawn;

[0019] S3. When conducting tests on different slopes, the test chamber is pushed by a hydraulic push cylinder to change the inclination angle. During the test, the landslide body slides down and the remaining base materials will also shift. To reduce the workload, the electric push cylinder can be used to pull the filling platform to rotate in the opposite direction, so that the landslide base material slides in the opposite direction to reset;

[0020] S4. Apply horizontal and vertical pressure to the landslide in the test chamber through the rammed earth assembly, obtain the vertical load parameter and horizontal load parameter of the test body through the sensor, obtain the vertical displacement parameter and horizontal displacement parameter of the test body, record the landslide failure process of the test body, and draw the curve model of relevant parameters;

[0021] S5. Finally, based on the soil pressure curve, pore water pressure curve, water content, displacement curve and the recorded landslide failure process, the physical and mechanical parameters corresponding to the prototype are restored according to the similarity theory to evaluate the stability of the landslide.

[0022] In summary, the present invention includes the following beneficial technical effects:

[0023] 1. By integrating the rotatable test cabin, rammed earth components and rainfall components, the landslide process of the landslide body under the action of rainfall can be systematically reproduced, and the key stages of the landslide body from the initial state to the final destruction can be simulated in the indoor environment. A high degree of controllability and automated operation can be achieved. The structural design can ensure the consistency between the test simulation process and the actual landslide geological disaster, and can simulate landslides with different rainfall intensities, different slopes and different media, improve the efficiency of landslide simulation, study the sliding mechanism of rainfall-type landslides, study the sliding process, study the changes in the physical and mechanical parameters of the sliding body, and study the changes in stress and strain in the sliding body, thereby improving the monitoring capability and early warning accuracy of such geological disasters, and providing a more reliable scientific basis for disaster prevention and mitigation work.

[0024] 2. After simulating the landslide collapse test, the base of the landslide components still remains on the filling platform. The filling platform is driven to rotate by the electric push cylinder, so that the basic material of the landslide body slides on the filling platform under the action of its own gravity. When the sliding is reset, the filling platform is driven to rotate parallel to the test chamber by the electric push cylinder, and then the staff can fill the basic material to construct the landslide body. Through this structural design, the use of landslide body materials can be reduced, and the workload of staff filling can be reduced, which is also conducive to the start of the next test.

[0025] 3. The independently configured ramming components and rainfall components can ensure that they do not interfere with each other when rotating in the test chamber. This design effectively improves the safety of ramming operations and rainfall simulation processes, and provides a guarantee for the stability and safety of the test environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 2 is a schematic diagram of the structure of a rainfall-type large-scale landslide physical simulation test device according to an embodiment of the present invention;

[0027] Figure 2 2 is a schematic structural diagram of the other side of the rainfall-type large-scale landslide physical simulation test device in an embodiment of the present invention;

[0028] Figure 3 is a schematic structural diagram of a test cabin in an embodiment of the present invention;

[0029] Figure 4 2 is a schematic diagram of the structure of the interior of the test chamber in an embodiment of the present invention;

[0030] Figure 5 is a schematic diagram of the structure of the other side of the interior of the test chamber in an embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the soil filling platform and the electric push cylinder in an embodiment of the present invention;

[0032] Figure 7 yes Figure 6 The enlarged structural diagram at A in the middle;

[0033] Figure 8 is a schematic diagram of the structure of a rainfall component in an embodiment of the present invention;

[0034] Fig. 9 is a schematic structural diagram of a rammed earth assembly in an embodiment of the present invention;

[0035] Fig.10 It is a schematic diagram of the structure of the protective net in an embodiment of the present invention;

[0036] Fig.11 is a schematic diagram of the structure of the other side of the protective net in an embodiment of the present invention;

[0037] Fig.12 It is a schematic structural diagram of a torsion spring, a ratchet, an inner tube and a protective net in an embodiment of the present invention.

[0038] Explanation of the accompanying drawings: 1. Test cabin; 2. Filling platform; 3. Electric push cylinder; 4. Ramming assembly; 400. Support and moving mechanism; 401. Support member; 402. Left and right moving mechanism; 403. Ramming member; 5. Rainfall assembly; 500. Cross plate; 501. Vertical plate; 502. Electric telescopic rod; 503. Mounting plate; 504. Spray member; 6. Track groove; 7. Sliding shaft; 8. Insert rod; 9. Vibrating plate; 10. Hydraulic push cylinder; 11. U-shaped plate; 12. Outer tube; 13. Vertical tube; 14. Protective net; 15. Mud stop plate; 16. Torsion spring; 17. Ratchet; 18. Inner tube. DETAILED DESCRIPTION

[0039] The following is combined with Figures 1 to 12 The present invention is described in further detail.

[0040] It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any size is only illustrative and not restrictive. In addition, the same reference symbol is used for the same structure, element or accessory appearing in more than two figures to reflect similar features.

[0041] Embodiment 1

[0042] The embodiment of the present invention discloses a rainfall-type large-scale landslide physical simulation test device and method. Figures 1 to 7The rainfall-type large-scale landslide physical simulation test device comprises a test cabin 1 which can be rotated to adjust the inclination angle; a filling platform 2 which is rotatably arranged inside the test cabin 1 and is used to simulate the landslide; an electric push cylinder 3 which is hingedly assembled inside the test cabin 1 through a support, and the output end of the electric push cylinder 3 is hingedly arranged at the bottom of the filling platform 2, and the electric push cylinder 3 can drive the filling platform 2 to rotate in the test cabin 1, so that the landslide base material after sliding is moved and reset to the initial position; a ramming assembly 4 which is used in conjunction with the test cabin 1 to ram the filling platform 2 The soil is compacted to form a simulated landslide body; the rainfall component 5 is used in conjunction with the test cabin 1 to simulate rainfall on the landslide body on the fill platform 2; the front of the test cabin 1 is hingedly equipped with a door body, which is used to facilitate the staff to clean the soil in the test cabin 1, and a baffle plate is detachably installed on the side close to the door body in the test cabin 1 to prevent the soil from impacting the door body, and there is a certain buffer space between the baffle plate and the door body. The outer side of the test cabin 1 is made of pillars and transparent glass, which is convenient for external staff to watch the test situation in the test cabin 1.

[0043] Furthermore, after simulating the landslide collapse test, the base layer of the landslide component still remains on the filling platform 2. The electric push cylinder 3 is used to drive the filling platform 2 to rotate, so that the basic material of the landslide body slides on the filling platform 2 under the action of its own gravity. After the sliding is reset, the electric push cylinder 3 is used to drive the filling platform 2 to rotate parallel to the test chamber 1, and then the staff can fill the basic material to construct the landslide body. Through this structural design, the use of landslide body materials can be reduced, and the workload of staff in filling can be reduced, which is also conducive to the start of the next test.

[0044] Specifically, the filling platform 2 is assembled in the test chamber 1 by rotating the shaft. Two track grooves 6 are provided on the inner wall of the test chamber 1. Sliding shafts 7 are fixedly connected to both sides of the filling platform 2, and the two sliding shafts 7 are slidably set in the corresponding track grooves 6. When the filling platform 2 is rotated to adjust the angle, the two sliding shafts 7 will rotate in the corresponding track grooves 6, thereby increasing the stability of the filling platform 2 during rotation.

[0045] Specifically, an electric push rod is installed on the side of the test chamber 1 and at the top of the track groove 6, and the output end of the electric push rod is equipped with a plug rod 8. A socket is opened at the side end of the sliding shaft 7. When the filling platform 2 is horizontal with respect to the test chamber 1, the plug rod 8 corresponds to the position of the socket on the sliding shaft 7, and the plug rod 8 can be plugged into the socket. After the filling platform 2 is horizontal with the test chamber 1, the two sliding shafts 7 will be aligned with the position of the socket on the corresponding plug rod 8. At this time, the plug rod 8 is pushed to move by the electric push rod, so that the plug rod 8 is plugged into the socket, thereby limiting the position of the filling platform 2. When the tamping assembly 4 tamps the material on the filling platform 2, the pressure on the electric push cylinder 3 can be shared to avoid the filling platform 2 from tilting.

[0046] Specifically, a pair of vibration plates 9 are installed inside the test chamber 1 through a bracket, and the two vibration plates 9 are symmetrically arranged on both sides of the electric push cylinder 3. In order to ensure the reset and correction of the base material of the landslide body or to reset and correct the base material of the landslide body faster, when the filling platform 2 is attached to the vibration plate 9, the vibration plate 9 can work and vibrate to accelerate the sliding reset of the base material of the landslide body.

[0047] Specifically, the vibration plate 9 is arranged at an angle, and the bottom of the filling platform 2 can be completely fitted with the vibration plate 9 .

[0048] Specifically, one side of the test cabin 1 is hinged on an external base, and the other side of the test cabin 1 is hingedly equipped with two hydraulic push cylinders 10. The side of the test cabin 1 is also equipped with a control sensor and a pressure- and flow-stabilizing CNC metering oil source pump station for controlling the two hydraulic push cylinders 10 to ensure that the two hydraulic push cylinders 10 have the same progress, thereby ensuring the balance of both sides of the test cabin 1, thereby fully simulating the slope gradient of the landslide body under a natural state. For the rotation of the test cabin 1, one side of the test cabin 1 is pushed upward by the hydraulic push cylinder 10, thereby completing the rotation of the test cabin 1 and meeting the requirements of the inclination angle of the landslide body.

[0049] Specifically, a sensor is provided on the filling platform 2 for detecting the real-time state of the landslide body. The sensor is electrically connected to the external control system, and the detected data is fed back to the external control system for analysis, and a relevant curve is drawn to finally form a landslide stability analysis and early warning model, which is transmitted to the display terminal for researchers to consult, so as to record, analyze and compare various parameters of the simulated landslide body; the sensors include an inclination moisture content sensor, a displacement sensor, a rainfall sensor, an earth pressure sensor, a pore water pressure sensor, a video monitoring sensor and a transmitting sensor;

[0050] In particular, the inclination moisture content is used to monitor the moving acceleration and moisture content of the test body, and then monitor the deformation stage and deformation degree of the simulated landslide and the change of moisture content during the deformation process; the displacement sensor can detect the displacement of the simulated landslide body after being subjected to force, and then determine the deformation of the simulated landslide body; the transmitting sensors can be arranged in large numbers at different monitoring points of the test body, so as to monitor in real time whether the simulated landslide body is deformed.

[0051] Embodiment 2

[0052] This embodiment is further optimized on the basis of the above embodiment, and the same parts as the above technical solution will not be repeated here. Fig. 9 As shown, in order to better realize the present invention, the following configuration is particularly adopted: in this embodiment, the rammed earth assembly 4 includes a support moving mechanism 400, a support member 401 is slidably provided on the top of the support moving mechanism 400, a left-right moving mechanism 402 is fixedly provided on the top of the support member 401, and a tamping member 403 for tamping and fastening the landslide body is assembled on the side of the left-right moving mechanism 402;

[0053] Among them, the support moving mechanism 400 can support the entire rammed earth assembly 4, and at the same time can satisfy the support member 401 to move forward and backward on the support moving mechanism 400, thereby allowing the tamping member 403 to move forward and backward on the top of the test chamber 1, meeting the tamping demand of the landslide body, and can also make the tamping member 403 away from the test chamber 1, without affecting the staff filling materials, the rammed earth assembly 4 and the test chamber 1 are designed to be separated and independent, and when the test chamber 1 is rotated to adjust the angle, it will not affect the rammed earth assembly 4, the support moving mechanism 400 includes a plate, a slide groove is provided on the plate, a screw is installed in the slide groove, and a motor is provided to drive the screw to rotate, and the support member 401 is connected to the screw through a slider;

[0054] The support member 401 includes a vertical plate, an electric push rod is installed in the vertical plate, and the left-right moving mechanism 402 is installed at the top of the electric push rod, so that the left-right moving mechanism 402 can move up and down. Through this design, the tamping stroke of the tamping member 403 can be increased, the height of the landslide body can be expanded, and the flexibility of the device can be increased;

[0055] The left-right moving mechanism 402 can drive the compacting member 403 to move left-right on the filling platform 2 to meet the material compaction requirements, and is specifically composed of a screw and a slider structure;

[0056] The compacting member 403 includes a hydraulic rod mounted on the left-right moving mechanism 402, and a compacting plate is mounted on the bottom end of the hydraulic rod, thereby completing the compaction of the material.

[0057] Specifically, refer to Figure 8The rainfall assembly 5 includes a horizontal plate 500, a vertical plate 501 is mounted on the top of the horizontal plate 500 through a support rod, an electric telescopic rod 502 is fixedly mounted at the bottom center of the vertical plate 501, an output end of the electric telescopic rod 502 is rotatably connected to a mounting plate 503, a side end of the mounting plate 503 is mounted with a spraying member 504, the telescopic rod 502 is preferably electric, and when the test chamber 1 is rotated, raised and tilted, the telescopic rod 502 can push the spraying member 504 to move upward;

[0058] Among them, the spray part 504 includes a conduit fixedly connected to the side end of the mounting plate 503, a horizontal pipe fixedly connected to the bottom end of the conduit, and a plurality of nozzles equidistantly connected to the bottom of the horizontal pipe. The conduit is connected by an external water pump to guide the water flow into the horizontal pipe and spray it out by the nozzle, thereby simulating the rain scene. At the same time, the rainfall component 5 and the test chamber 1 are separately arranged. The rotation of the test chamber 1 will not affect the normal operation of the rainfall component 5, and the vertical spraying water can be maintained to restore natural rainfall to the greatest extent.

[0059] Embodiment 3

[0060] This embodiment is further optimized on the basis of the above embodiment, and the same parts as the above technical solution will not be repeated here. Fig.10 , Fig.11 and Fig.12 As shown, in order to better realize the present invention, the following setting mode is particularly adopted: in this embodiment, the baffle plate in the test chamber 1 can also be set as a detachable component, specifically, a U-shaped plate 11 detachably assembled in the test chamber 1, a vertical pipe 13 is fixedly assembled at the top center of the U-shaped plate 11, two outer tubes 12 are arranged at the top of the U-shaped plate 11 on both sides of the vertical pipe 13, a torsion spring 16 is arranged inside the outer tube 12 through a rotating column, a ratchet 17 is arranged on the top of the torsion spring 16, an inner tube 18 is fixedly connected to the top of the ratchet 17, a protective net 14 is wound around the periphery of the inner tube 18, one end of the protective net 14 is fixedly connected to the middle of the vertical pipe 13, a mud blocking plate 15 is arranged on the side of the outer tube 12 relative to the protective net 14, and a rotating disk for rotating the inner tube 18 is arranged on the top of the outer tube 12;

[0061] Special note: During the simulated landslide test, when the soil slides down and impacts on the filling platform 2, the protective net 14 can buffer the sliding soil. When the protective net 14 is impacted, it will move toward the door body of the test chamber 1. At this time, the inner tube 18 will rotate under the action of the pulling force, and the ratchet 17 will drive the torsion spring 16 to twist the specific elastic force, thereby buffering the impact force. At the same time, the protective net 14 will extend under the action of the rotation of the inner tube 18 to buffer the soil. Through this structural design, the impact of the sliding soil on the door body can be reduced, and the impact force of the sliding soil in the simulated landslide test can be reduced. When the protective net 14 is rolled up in the later stage, the staff can rotate the inner tube 18 to collect the pulled out protective net 14. At this time, the ratchet 17 rotates in the opposite direction and will not drive the torsion spring 16 to twist.

[0062] Embodiment 4

[0063] The test method of the rainfall-type large-scale landslide physical simulation test device has the following specific steps:

[0064] S1. Use landslide soils formed by different geological causes (such as rainfall-induced, earthquake-induced, natural evolution, freeze-thaw infiltration, underground excavation, slope cutting and unloading, engineering loading, reservoir infiltration, and blasting vibration), place them on the top of the filling platform 2, and tamp the soil through the tamping assembly 4 to make the soil in the test chamber 1 reach the density of the original soil, so as to construct a simulated landslide body;

[0065] S2, then the test chamber 1 is rotated by the hydraulic push cylinder 10 to simulate the slope of the landslide in the natural state, and according to the preset rainfall conditions, the landslide on the fill platform 2 is simulated by the rainfall component 5, and then the soil pressure value, pore water pressure value and volume water content value in the test body are collected by the soil pressure gauge, pore water pressure gauge and volume water content sensor in the civil engineering test, and the curve model of the relevant parameters is drawn;

[0066] S3. When conducting tests on different slopes, the hydraulic push cylinder 10 is used to push the test chamber 1 to change the inclination angle. During the test, the landslide body slides down and the remaining base materials will also shift. In order to reduce the workload, the electric push cylinder 3 can be used to pull the filling platform 2 to rotate in the opposite direction, so that the landslide base material slides in the opposite direction to reset;

[0067] S4, applying horizontal and vertical pressure to the landslide in the test chamber 1 through the rammed earth assembly 4, obtaining the vertical load parameter and horizontal load parameter of the test body through the sensor, and obtaining the vertical displacement parameter and horizontal displacement parameter of the test body, recording the landslide failure process of the test body, and at the same time, drawing a curve model of related parameters;

[0068] S5. Finally, based on the soil pressure curve, pore water pressure curve, water content, displacement curve and the recorded landslide failure process, the physical and mechanical parameters corresponding to the prototype are restored according to the similarity theory to evaluate the stability of the landslide.

[0069] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0070] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0074] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0075] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rainfall-type large-scale landslide physical simulation test device, characterized in that: include: A test cabin (1) capable of rotating to adjust the tilt angle; A soil filling platform (2) is rotatably arranged inside the test chamber (1) and is used to simulate a landslide; An electric push cylinder (3) is hingedly assembled inside the test chamber (1) through a support, and an output end of the electric push cylinder (3) is hingedly arranged at the bottom of the filling platform (2). The electric push cylinder (3) can drive the filling platform (2) to rotate in the test chamber (1), so that the landslide base material after sliding is moved and reset to the initial position; A rammed earth assembly (4) is used in conjunction with the test chamber (1) to ram the soil on the fill platform (2) to form a simulated landslide body; The rainfall component (5) is used in conjunction with the test chamber (1) to simulate rainfall on the landslide body on the fill platform (2).

2. The rainfall-type large-scale landslide physical simulation test device according to claim 1 is characterized in that: The soil-filling platform (2) is rotatably mounted in the test chamber (1) via a rotating shaft, and two track grooves (6) are provided on the inner wall of the test chamber (1). Sliding shafts (7) are fixedly connected to both sides of the soil-filling platform (2), and the two sliding shafts (7) are slidably arranged in the corresponding track grooves (6).

3. The rainfall-type large-scale landslide physical simulation test device according to claim 2 is characterized in that: An electric push rod is installed on the side of the test chamber (1) and at the top of the track groove (6); an insertion rod (8) is installed at the output end of the electric push rod; a plug hole is opened at the side end of the slide shaft (7); when the filling platform (2) is horizontal relative to the test chamber (1), the insertion rod (8) corresponds to the position of the plug hole on the slide shaft (7), and the insertion rod (8) can be plugged into the plug hole.

4. The rainfall-type large-scale landslide physical simulation test device according to claim 2 is characterized in that: A pair of vibration plates (9) are mounted inside the test chamber (1) via a bracket, and the two vibration plates (9) are symmetrically arranged on both sides of the electric push cylinder (3).

5. The rainfall-type large-scale landslide physical simulation test device according to claim 4 is characterized in that: The vibration plate (9) is arranged at an angle, and the bottom of the soil filling platform (2) can be completely fitted with the vibration plate (9).

6. The rainfall-type large-scale landslide physical simulation test device according to claim 1 is characterized in that: One side of the test cabin (1) is hinged on an external base, and the other side of the test cabin (1) is hingedly equipped with two hydraulic push cylinders (10). The side of the test cabin (1) is also equipped with a control sensor and a pressure- and flow-stabilizing CNC metering oil source pump station for controlling the two hydraulic push cylinders (10) to ensure that the two hydraulic push cylinders (10) move in the same direction, thereby ensuring the balance of both sides of the test cabin.

7. The rainfall-type large-scale landslide physical simulation test device according to claim 1 is characterized in that: The filling platform (2) is provided with a sensor for detecting the real-time status of the landslide body. The sensor is electrically connected to an external control system and feeds back the detected data to the external control system for analysis, draws a relevant curve and finally forms a landslide stability analysis and early warning model. The sensors include an inclination moisture content sensor, a displacement sensor, a rainfall sensor, an earth pressure sensor, a pore water pressure sensor, a video monitoring sensor and a transmitting sensor.

8. The rainfall-type large-scale landslide physical simulation test device according to claim 1 is characterized by: The rammed earth assembly (4) comprises a supporting and moving mechanism (400), a supporting member (401) being slidably arranged on the top of the supporting and moving mechanism (400), a left-right moving mechanism (402) being fixedly arranged on the top of the supporting member (401), and a tamping member (403) for tamping and fastening the landslide being mounted on the side of the left-right moving mechanism (402).

9. The rainfall-type large-scale landslide physical simulation test device according to claim 1 is characterized in that: The rainfall assembly (5) comprises a transverse plate (500), the top of the transverse plate (500) is equipped with a vertical plate (501) via a support rod, an electric telescopic rod (502) is fixedly mounted at the bottom center of the vertical plate (501), the output end of the electric telescopic rod (502) is rotatably connected to a mounting plate (503), and a spraying member (504) is mounted on the side end of the mounting plate (503).

10. The test method of the rainfall-type large-scale landslide physical simulation test device according to any one of claims 1 to 9, characterized in that: The specific steps are as follows: S1. Landslide soil formed by different geological causes is placed on the top of the filling platform (2), and the soil is compacted by a tamping assembly (4) so ​​that the soil in the test chamber (1) reaches the density of the original soil, thereby constructing a simulated landslide body; S2, the test chamber (1) is then rotated by the hydraulic push cylinder (10) to simulate the slope of the landslide in the natural state, and according to the preset rainfall conditions, the landslide on the fill platform (2) is simulated by the rainfall component (5), and then the soil pressure value, pore water pressure value and volume water content value in the test body are collected by the soil pressure gauge, pore water pressure gauge and volume water content sensor, and a curve model of the relevant parameters is drawn; S3. When conducting tests on different slopes, the test chamber (1) is pushed by the hydraulic push cylinder (10) to change the inclination angle. During the test, the landslide body slides down and the remaining base material also shifts. To reduce the workload, the electric push cylinder (3) can be used to pull the filling platform (2) to rotate in the opposite direction, thereby causing the landslide base material to slide in the opposite direction for reset; S4, applying horizontal and vertical pressure to the landslide in the test chamber (1) through the rammed earth assembly (4), obtaining vertical load parameters and horizontal load parameters of the test body through sensors, and obtaining vertical displacement parameters and horizontal displacement parameters of the test body, recording the landslide failure process of the test body, and at the same time, drawing a curve model of relevant parameters; S5. Finally, based on the soil pressure curve, pore water pressure curve, water content, displacement curve and the recorded landslide failure process, the physical and mechanical parameters corresponding to the prototype are restored according to the similarity theory to evaluate the stability of the landslide.

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