Small full-scale test device for simulating slope instability

Abstract

The utility model discloses a small-sized full-scale test device for simulating slope instability. The device comprises a side slope simulation device body, a supporting bottom plate arranged at the bottom end of the side slope simulation device body, a lifting support arranged below the supporting bottom plate, a water collecting and flow guiding groove formed in the bottom end of the periphery of the supporting bottom plate, and a rainfall simulation structure arranged above the side slope simulation device body and comprising a rainfall pipeline network and vertical rods. The dewatering pipeline network is connected with an external water source through a water conveying pipeline; a camera is arranged on one side of the slope simulation device body; the side slope simulation device body comprises layered tamped side slope soil, and a sensor assembly is arranged in the side slope soil and connected with an external computer terminal through a circuit. According to the device, the slope instability condition is tested by simulating rainfall, increasing load and simulating the foundation sinking environment, real-time change data of slope instability is obtained, and data support is provided for slope protection design, construction guidance and timely early warning in disaster weather.

Description

Technical Field

[0001] The utility model relates to a small full-scale test device for simulating slope instability. Background Art

[0002] The deaths and economic losses caused by geological disasters have brought great risks to people's production and life. Slope instability accounts for the largest proportion of geological disasters. Common damage modes include: collapse, landslide, debris flow, scour, spalling, etc., which occur frequently and in serious forms, causing great inconvenience to people's lives and restricting the development of the country and society.

[0003] Slope instability includes natural slope instability and artificial slope instability. Artificial slopes include common highway slopes. Regardless of the form of slope, its stability can protect people's lives and property. Taking highway slope instability as an example, the factors causing slope instability mainly include natural factors and load pressure. The overall influence of multiple factors makes the slope prone to instability when combined with internal and external factors. In order to better grasp the slope instability information and provide support for subsequent effective early warning, it is necessary to study the experimental device that affects different factors or their combinations on highway slope instability. In addition, there are many monitoring methods in the simulation test of highway slopes, but the main monitoring method is displacement changes. The ability to obtain dynamic information of slopes under the influence of external environment more accurately and efficiently and to make timely and effective predictions and early warnings is insufficient.

[0004] Based on this, this application proposes a small full-scale test device for simulating slope instability, conducts typical slope instability failure tests outdoors, studies the slope instability under the combined influence of different factors such as rainy season precipitation, load, and / or foundation subsidence, and obtains the real-time deformation law of slope instability, which can provide data support for slope protection design, construction measures guidance, and timely warning in disastrous weather. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes a small full-scale test device for simulating slope instability. By simulating precipitation, increasing load, and / or simulating foundation sinking environment to test the slope instability, real-time change data of slope instability is obtained, which provides data support for slope protection design, construction measures guidance and timely warning in disaster weather, and solves the problems existing in the prior art.

[0006] The utility model provides the following technical solutions:

[0007] A small full-scale test device for simulating slope instability, comprising a slope simulation device body, a supporting bottom plate arranged at the bottom end of the slope simulation device body, a lifting support arranged below the supporting bottom plate, a water collecting and diversion groove arranged around the bottom end of the outer periphery of the supporting bottom plate, a precipitation simulation structure arranged above the slope simulation device body, the precipitation simulation structure comprising a precipitation pipeline network and a vertical pole for supporting the precipitation pipeline network, the precipitation pipeline network being connected to an external water source via a water delivery pipeline above; and a camera arranged on one side of the slope simulation device body;

[0008] The main body of the slope simulation device includes layered compacted slope soil, in which a sensor assembly is arranged, and a plurality of groups of the sensor assemblies are evenly buried in the slope soil, and the sensor assemblies are connected to an external computer terminal via a line;

[0009] The small full-scale test device also includes a loading stone used in conjunction with the slope simulation device body.

[0010] Furthermore, the water collecting and diversion trough includes rectangular diversion troughs continuously arranged around the main body of the slope simulation device, the inner bottom wall of each rectangular diversion trough is inclined, and the adjacent rectangular diversion troughs are interconnected and connected to form diversion channels with decreasing heights, and a drainage outlet is arranged at a lower position of the inner bottom wall of the water collecting and diversion trough on the lowest side.

[0011] Furthermore, the precipitation pipeline network includes a first horizontal pipeline and a second horizontal pipeline which are vertically connected to each other. The middle part of the first horizontal pipeline is connected to a water main via a water pipeline, and the water main is connected to an external water source via a pump body; a plurality of water outlet pipes are evenly spaced at the bottom end of the first horizontal pipeline, and a nozzle is provided at the bottom end of each water outlet pipe.

[0012] Furthermore, an electric control valve is arranged on each water outlet pipe, and the electric control valve controls the number of opened nozzles through a computer terminal.

[0013] Furthermore, the water supply pipeline is made of PVC material.

[0014] Furthermore, the first horizontal pipelines include three pipelines arranged at intervals, and a plurality of second horizontal pipelines are arranged at intervals along the length direction of the first horizontal pipelines adjacent to each other.

[0015] Furthermore, the water outlet pipes on adjacent first horizontal pipelines are arranged in a staggered manner.

[0016] Furthermore, the solenoid valves on the water outlet pipes on each first horizontal pipe are controlled in a unified manner.

[0017] Furthermore, each nozzle is arranged at an angle of 60° with the bottom end of the water outlet pipe.

[0018] Furthermore, the vertical poles include two vertical poles fixed on the outside of the slope simulation device body, and the top ends of the vertical poles are connected to the two ends of the precipitation pipeline network via triangular brackets.

[0019] Furthermore, the bottom end of the vertical pole is fixed to the ground via embedded bolts.

[0020] Furthermore, the slope simulation device body includes 3-5 layers of paved and compacted slope soil layers, and the sensor assemblies are evenly arranged in each layer of the slope soil layer. The sensor assemblies on the same layer of the slope soil layer are buried in 5 groups evenly spaced along the length and width directions of the soil layer; the sensor assemblies are gyroscope sensors and soil temperature and humidity sensors.

[0021] Furthermore, each group of gyro sensors and soil temperature and humidity sensors are placed crosswise in the slope soil layer; the outer side of the sensor assembly and the line is filled with fine sand.

[0022] Furthermore, the sensor assembly is buried after digging out reserved channels in each layer of slope soil during the compaction and paving process of the slope soil; fine sand is used to fill the sensor assembly and the line after the sensor assembly is placed.

[0023] Furthermore, the gyro sensor uses a nine-axis attitude angle gyro sensor, which has high module integration accuracy and accurate measurement accuracy. It can obtain instantaneous motion attitude, and process the inside of the gyro sensor so that the gyro sensor can transmit the collected data wirelessly and directly to the external computer cloud. The soil temperature and humidity sensor uses a capacitive soil temperature and humidity sensor, which can monitor the temperature and humidity of the soil at the same time. Multiple sensors are collected on the terminal board through the data interface, connected to the external computer through the photoelectric isolation converter, and the data is directly measured by the acquisition and analysis software. It can be buried in the roadbed slope for long-term testing and testing.

[0024] Furthermore, the supporting base plate is a steel support plate; the lifting support is an electric hydraulic lifting support; and the loading stone is a concrete flexural test block.

[0025] Furthermore, the supporting base plate is made up of 4 small steel plates with a specification of 2m×2m. Coarse steel bars are welded at the bottom of the small steel plates to improve the supporting capacity of the steel plates and prevent deformation and damage of the steel plates. Annular bolts are used to connect the small steel plates. After splicing, the specification of the supporting base plate is 4m×4m.

[0026] Furthermore, the lifting supports include three groups that are spaced apart, and each group of lifting supports includes three that are spaced apart.

[0027] Furthermore, the lifting support slowly descends in the same vertical direction or in vertical directions at different heights, with a descending speed of 0.1-1 mm / min, so as to simulate different situations of foundation descending.

[0028] Furthermore, the slope of the slope simulation device body is 1:1-1:1.5.

[0029] Furthermore, the height of the slope simulation device body is 80-120 cm, and the thickness of each slope soil layer is 20-30 cm.

[0030] Furthermore, the weight of the loading stones is 100-1000 kg. The size of each loading stone is 150×150×550 mm, and each stone weighs about 30 kg.

[0031] The method for using the above-mentioned small-scale full-scale test device for simulating slope instability to conduct slope instability testing adopts the following operating steps:

[0032] Step 1: Prepare gyroscope sensors, soil temperature and humidity sensors, computer data acquisition software, water pipelines, sprinklers for precipitation simulation structures, supporting base plates, lifting supports, power supplies, water sources and other equipment and instruments, process and debug gyroscope sensors and soil temperature and humidity meters, and sort out the sensor connection data acquisition lines.

[0033] Step 2: Select representative slope soil samples for indoor testing, including moisture content, liquid limit, plastic limit, particle analysis, compaction, CBR, etc. The outdoor open space is reinforced and leveled, and lifting supports are evenly arranged on the ground. The spacing between the lifting supports is 2m, and there are 9 lifting supports. A supporting base plate is placed horizontally on the top of the lifting support, and the initial height of the supporting base plate from the ground is 0.4m.

[0034] Step 3: Fill the slope soil onto the supporting bottom plate in layers, with each layer of 20-30cm thick. After leveling and vibrating, perform compaction testing. While the slope is being filled, bury the sensor assembly. Dig out reserved channels in each layer, cross-place 3-5 gyroscope sensors and soil temperature and humidity sensors. After placement, fill the sensors and lines with fine sand to prevent the sensors and lines from being disturbed or damaged. After each layer is buried, debug the sensors to avoid unstable data collection and transmission after all paving, and avoid rework.

[0035] Step 4: The slope is paved in 3 to 5 layers with a total height of 80 to 120 cm. After paving and compaction, the slope is cut with a slope of 1:1 to 1:1.5 to obtain the geometric dimensions required for the slope test. The slope is left to stand for observation for 24 hours to prevent collapse or landslides before the test. The sensor is debugged again before the test to ensure accurate and efficient data output.

[0036] Step 5: Set loading stones with a total weight of 100 to 1000 kg on the top of the slope to simulate the impact of various loads on the slope; set a precipitation simulation structure above the slope, with a precipitation pipe network evenly arranged horizontally and vertically, and the nozzles at the bottom evenly arranged to evenly spread water on the slope soil to simulate the impact of atmospheric rainfall on the slope; adjust the height at the bottom of the slope by lifting the support so that the supporting bottom plate slowly descends in one direction or multiple directions, with a descending rate of 0.1 to 1 mm / min, to simulate the impact of foundation sinking on the slope; place one or more video cameras on one side of the slope to observe the changes in slope instability and damage in real time.

[0037] Step 6: Use analysis software on the computer to classify the collected data uniformly, perform nonlinear fitting after classification, and use the bidoseresp model function levenberg-marquardt algorithm to iterate to obtain the fitted data information. After nonlinear fitting, find the obvious peak point time, indicating that the stress and shear balance failure occurred inside the soil at this time, and obtain the sensor angle difference change area. This interval value is to ensure the safety value during construction and operation.

[0038] The small-scale full-scale test device for simulating slope instability proposed in this application can bring the following beneficial effects:

[0039] 1. The overall structural design of the small full-scale test device of the present application is reasonable. By burying the sensor assembly in the body of the slope simulation device, it can collect slope instability data information in real time and dynamically according to different external influencing factors during the test process, and provide data support for the subsequent slope protection design and construction measures. Compared with the existing slope instability test indoors for precipitation, earthquake or overload simulation test, the device of the present application combines the influence of precipitation, load and / or settlement in different directions on slope stability, and explores the real-time changes of slope instability in the process; moreover, the precipitation simulation structure of the present application adopts the form of precipitation pipeline network, and the nozzle is tilted through the outlet pipe under the precipitation pipeline network, so that the nozzle is set at an angle of 60° with the outlet pipe, and the water sprayed by the nozzle is parabolic, which is closer to the state of rainfall falling. At the same time, the number of nozzles is controlled by the electric control valve, and the flow control per unit time can be realized, thereby controlling the rainfall intensity. By setting up water collection and diversion troughs around the main body of the slope simulation device, it is avoided that the water sprinkled by the precipitation simulation structure will pollute the test site after falling. In particular, the water collection and diversion trough adopts a ladder-shaped inclined downward design as a whole, which makes it easier to collect the falling water. At the same time, a certain amount of sinking and adhesion time is given to the slope soil attached to the falling water, avoiding the blockage of the water outlet. The investigation of the influence of settlement factors in different directions of this application is mainly achieved through the multiple lifting supports set under the supporting bottom plate. The lifting supports can achieve synchronous descent in the same direction or descent in different directions, combining and considering the internal factors of the slope, and better simulating the actual slope instability changes.

[0040] 2. The small full-scale test device of this application has the ability to improve the slope instability test to obtain dynamic information, provide more sufficient data support for slope instability research for theoretical and practical analysis, and enhance the ability of prediction and early warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation on the present invention. In the drawings:

[0042] Figure 1 It is a schematic diagram of the structure of the utility model;

[0043] Figure 2 for Figure 1 A top view of the structure of the main body of the middle slope simulation device;

[0044] Figure 3 for Figure 1 A top view of the structure of the central precipitation pipeline network;

[0045] Figure 4 It is a structural schematic diagram of the connection state of the water outlet pipe and the nozzle of the utility model.

[0046] Among them, 1 is the main body of the slope simulation device, 101 is the sensor assembly, 2 is the supporting base plate, 3 is the lifting support, 4 is the water collection and diversion trough, 401 is the rectangular diversion trough, 402 is the drainage outlet, 5 is the precipitation simulation structure, 501 is the vertical pole, 502 is the water pipe, 503 is the first horizontal pipeline, 504 is the second horizontal pipeline, 505 is the pump body, 506 is the water outlet pipe, 507 is the nozzle, 508 is the tripod bracket, 6 is the camera, 7 is the computer, and 8 is the loading stone. DETAILED DESCRIPTION

[0047] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0048] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0049] like Figure 1-4 As shown, this embodiment discloses the structure of the small-scale full-scale test device for simulating slope instability, specifically, it includes a slope simulation device body 1, a supporting base plate 2 is arranged at the bottom end of the slope simulation device body, a lifting support 3 is supported and arranged below the supporting base plate, a water collecting and diversion groove 4 is arranged around the bottom end of the outer periphery of the supporting base plate, and a precipitation simulation structure 5 is arranged above the slope simulation device body, the precipitation simulation structure includes a precipitation pipeline network and a vertical pole 501 for supporting the precipitation pipeline network, and the precipitation pipeline network is connected to an external water source via a water supply pipeline 502 above; a camera 6 is arranged on one side of the slope simulation device body.

[0050] The above-mentioned precipitation pipeline network includes a first horizontal pipeline 503 and a second horizontal pipeline 504 which are vertically connected to each other. The middle part of the first horizontal pipeline is connected to the water supply pipe via a water supply pipe 502, and the water supply pipe is connected to an external water source via a pump body 505; a plurality of water outlet pipes 506 are evenly spaced at the bottom end of the first horizontal pipeline, a nozzle 507 is arranged at the bottom end of each water outlet pipe, and an electric control valve (not shown in the figure) is arranged on each water outlet pipe, and the number of nozzles opened is controlled by the electric control valve via a computer terminal.

[0051] The first horizontal pipelines include three pipelines spaced apart along the front-to-back direction of the slope model device body, and a plurality of second horizontal pipelines are spaced apart along the length direction between two adjacent first horizontal pipelines. The outlet pipes on the front-to-back adjacent first horizontal pipelines are arranged in a staggered manner.

[0052] The electromagnetic valves on the odd-numbered outlet pipes on each first horizontal pipe are uniformly controlled, and the electromagnetic valves on the even-numbered outlet pipes on each first horizontal pipe are uniformly controlled. In this way, the rainfall intensity and rainfall area can be uniformly controlled by closing a part of the outlet pipes.

[0053] The above-mentioned nozzles are arranged at an angle of 60° with the bottom end of the water outlet pipe to perform jet-type rainfall, so that the raindrops fall in a parabolic shape.

[0054] The above-mentioned poles 501 include two poles fixed on the outside of the slope simulation device body, and the top of the pole is connected to the two ends of the precipitation pipeline network through a triangular bracket 508. The bottom of the pole is fixed to the ground through embedded bolts.

[0055] The above-mentioned slope simulation device body 1 includes 4 layers of layered compacted slope soil layers, and sensor assemblies 101 are evenly arranged in each slope soil layer. Five groups of sensor assemblies on the same slope soil layer are evenly spaced. The sensor assembly is connected to the external computer 7 terminal via a line. The sensor assembly is a gyroscope sensor and a soil temperature and humidity sensor. The sensor assembly is collected on the terminal board through a data interface and connected to the computer terminal via a photoelectric isolation converter. The gyroscope sensor and the soil temperature and humidity sensor are placed crosswise in the slope soil layer; the outer side of the sensor assembly and the line is filled with fine sand.

[0056] The sensor assembly is buried after digging out reserved channels in each layer of slope soil during the compaction and paving process of the slope soil; the fine sand is used to fill the sensor assembly and the line after the sensor assembly is placed.

[0057] The small full-scale test device further comprises a loading stone 8 used in conjunction with the slope simulation device body 1. The loading stone is divided into weight blocks of different load levels.

[0058] The above-mentioned water collection and diversion trough 4 includes rectangular diversion troughs 401 continuously arranged around the main body of the slope simulation device. The inner bottom wall of each rectangular diversion trough is inclined, and the adjacent rectangular diversion troughs are interconnected and connected to form a diversion channel with decreasing height. A drainage outlet 402 is set at a lower position of the inner bottom wall of the water collection and diversion trough on the lowest side.

[0059] The supporting bottom plate 2 is a steel supporting plate; the lifting support 3 is an electric hydraulic lifting support; the loading stone 8 is a concrete bending test block. The supporting bottom plate is made of 4 small steel plates with a specification of 2m×2m. Coarse steel bars are welded at the bottom of the small steel plates to improve the supporting capacity of the steel plates and prevent deformation and damage of the steel plates. The small steel plates are connected by ring bolts. After splicing, the supporting bottom plate has a specification of 4m×4m.

[0060] Furthermore, the lifting supports include three groups arranged at intervals, and each group of lifting supports includes three lifting supports arranged at intervals. The lifting supports slowly descend in the same vertical direction or in vertical directions at different heights, with a descending speed of 0.1-1 mm / min, so as to simulate different situations of foundation descending.

[0061] The slope simulation device body 1 has a slope of 1:1-1:1.5, a height of 80-120 cm, and a thickness of each slope soil layer of 20-30 cm.

[0062] Combined with the above-mentioned small-scale full-scale test device for simulating slope instability, the slope instability test is introduced. The following test combines the real-time status of the camera recording, under the influence of single or non-single external factors, combined with the influence of slope gradient changes, collects the data transmitted by each sensor in the sensor assembly, and simulates and observes the slope instability state.

[0063] Test 1: The slope gradient was 1:1.5, descending in one direction, the rainfall simulation structure was not turned on, and no loading stones were placed.

[0064] The test was started after the slope was left to stand for 24 hours. The lifting support 3 was used to make the supporting bottom plate 2 begin to descend in a certain direction at a rate of 1 mm / min, and the slope changes were observed in real time. At 100 minutes, tiny cracks began to appear on the surface of the slope. A comprehensive analysis of the values ​​measured by the gyroscope sensor showed that the angle change range was [0, 0.3]. At 230 minutes, the tiny cracks gradually connected into larger cracks, and there was an overall downward trend along the bottom plate. The angle change range was [0.3, 0.75]. At 290 minutes, the foot of the slope was damaged and the slope became unstable as a whole.

[0065] Test 2: The slope was 1:1, descending in one direction, the rainfall simulation structure was not turned on, and no loading stones were placed.

[0066] The test was started after the slope was left to stand for 24 hours. The lifting support 3 was used to lower the supporting bottom plate 2 in a certain direction at a rate of 1 mm / min, and the slope changes were observed in real time. At 80 minutes, tiny cracks began to appear on the slope surface, and the angle change range was [0, 0.1]. At 145 minutes, the tiny cracks gradually connected into larger cracks, and there was an overall downward trend along the bottom plate, and the angle change range was [0.1, 0.5]. At 240 minutes, the slope foot was damaged and the slope was unstable as a whole.

[0067] Test 3: The slope was 1:1.5, descending in multiple directions, the rainfall simulation structure was not turned on, and no loading stones were placed.

[0068] The test was started after the slope was left to stand for 24 hours. The lifting support was used to lower the supporting bottom plate in multiple directions at a rate of 1 mm / min, and the slope changes were observed in real time. At 125 minutes, the small cracks gradually connected into larger cracks, and there was an overall downward trend along the bottom plate. The angle change range was [0, 0.1]. At 255 minutes, the slope foot was damaged and the slope became unstable as a whole.

[0069] Test 4: The slope was 1:1, descending in multiple directions, the rainfall simulation structure was not turned on, and no loading stones were placed.

[0070] The test was started after the slope was left to stand for 24 hours. The lifting support was used to lower the supporting bottom plate in multiple directions at a rate of 1 mm / min, and the slope changes were observed in real time. At 110 minutes, the small cracks gradually connected into larger cracks, and there was an overall downward trend along the bottom plate. The angle change range was [0, 0.1]. At 200 minutes, the slope foot was damaged and the slope became unstable as a whole.

[0071] Test 5: The slope gradient was 1:1.5, the slope descended in one direction at a rate of 1 mm / min, the rainfall simulation structure was not turned on, and the stone load weight was 300 kg.

[0072] The test was started after the slope was left to stand for 24 hours. The lifting support was used to lower the supporting bottom plate in a certain direction at a rate of 1 mm / min, and the slope changes were observed in real time. At 75 minutes, tiny cracks began to appear on the slope surface, and the angle change range was [0, 0.25]. At 125 minutes, the tiny cracks gradually connected into larger cracks, and there was an overall downward trend along the bottom plate, and the angle change range was [0.25, 0.4]. At 180 minutes, the slope foot was damaged and the slope was unstable as a whole.

[0073] Test 6: The slope was 1:1, descending in one direction, with a rate of 1 mm / min, the rainfall simulation structure was not turned on, and the stone load weight was 300 kg.

[0074] The test was started after the slope was left still for 24 hours. The lifting support was used to lower the supporting bottom plate in a certain direction at a rate of 1 mm / min, and the slope changes were observed in real time. At 65 minutes, tiny cracks began to appear on the slope surface, and the angle change range was [0, 0.1]. At 110 minutes, the tiny cracks gradually connected into larger cracks, and there was an overall downward trend along the bottom plate, and the angle change range was [0.1, 0.2]. At 150 minutes, the slope foot was damaged and the slope was unstable as a whole.

[0075] Test 7: The slope was 1:1.5, descending in one direction at a rate of 1 mm / min. The rainfall simulation structure was turned on to achieve uniform rainfall, and no loading stones were placed.

[0076] The test was started after the slope was left to stand for 24 hours. The lifting support was used to lower the supporting bottom plate in a certain direction at a rate of 1 mm / min, and the slope changes were observed in real time. At 75 minutes, tiny cracks began to appear on the slope surface, and the angle change range was [0, 0.15]. At 170 minutes, the tiny cracks gradually connected into larger cracks, and there was an overall downward trend along the bottom plate, and the angle change range was [0.15, 0.2]. At 250 minutes, the slope foot was damaged and the slope was unstable as a whole.

[0077] Through the above test research, it is found that due to the simulated effect of the arrangement structure of gravity, direction, rainfall, etc. set in the device, the slopes with different slopes first produce slight cracks, and the angles show a certain regularity. The angle change range is [0, 0.2]. After a period of time, the cracks converge and show an obvious overall downward trend. The angle change range is [0.2, 0.5]. In order to better ensure the construction and operation of the slope, when the angle change range is [0, 0.2], it can be determined that the slope is in a stable state. When the angle change range exceeds [0, 0.2], it can be determined that the slope is about to become unstable and prediction and warning need to be started.

[0078] During the above test process, the soil temperature and humidity sensors installed in the device obtained the changes in temperature and humidity at different positions of the slope during the test, combined with the angle changes collected in each test, which can be used to provide data support for the formulation of subsequent slope stability protection measures.

[0079] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

[0080] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A small full-scale test device for simulating slope instability, characterized in that: It includes a slope simulation device body, a supporting bottom plate is arranged at the bottom end of the slope simulation device body, a lifting support is arranged below the supporting bottom plate, a water collecting and diversion groove is arranged around the bottom end of the outer periphery of the supporting bottom plate, and a precipitation simulation structure is arranged above the slope simulation device body, the precipitation simulation structure includes a precipitation pipeline network and a vertical pole for supporting the precipitation pipeline network, and the precipitation pipeline network is connected to an external water source through a water delivery pipeline above; a camera is arranged on one side of the slope simulation device body; The main body of the slope simulation device includes layered compacted slope soil, in which a sensor assembly is arranged, and a plurality of groups of the sensor assemblies are evenly buried in the slope soil, and the sensor assemblies are connected to an external computer terminal via a line; The small full-scale test device also includes a loading stone used in conjunction with the slope simulation device body.

2. The small full-scale test device for simulating slope instability according to claim 1 is characterized in that: The water collecting and diversion trough comprises rectangular diversion troughs which are continuously arranged around the main body of the slope simulation device. The inner bottom wall of each rectangular diversion trough is inclined. The adjacent rectangular diversion troughs are interconnected and connected to form a diversion channel with decreasing height. A drainage outlet is arranged at a lower position of the inner bottom wall of the water collecting and diversion trough on the lowest side.

3. The small full-scale test device for simulating slope instability according to claim 1 is characterized in that: The precipitation pipeline network includes a first horizontal pipeline and a second horizontal pipeline which are vertically connected to each other. The middle of the first horizontal pipeline is connected to a water main pipeline via a water pipeline, and the water main pipeline is connected to an external water source via a pump body. A plurality of water outlet pipes are evenly spaced at the bottom of the first horizontal pipeline, and a nozzle is arranged at the bottom of each water outlet pipe.

4. The small full-scale test device for simulating slope instability according to claim 3 is characterized in that: Each nozzle is arranged at an angle of 60° with the bottom end of the water outlet pipe.

5. The small full-scale test device for simulating slope instability according to claim 1 is characterized in that: The vertical poles include two poles fixed on the outside of the slope simulation device body, and the top ends of the vertical poles are connected to the two ends of the precipitation pipeline network via triangular brackets.

6. The small full-scale test device for simulating slope instability according to claim 1 is characterized in that: The slope simulation device body comprises 3-5 layers of paved and compacted slope soil layers, and the sensor assembly is arranged in each layer of the slope soil layer. Five groups of sensor assemblies are arranged at intervals on the same layer of the slope soil layer; the sensor assembly is a gyroscope sensor and a soil temperature and humidity sensor.

7. The small full-scale test device for simulating slope instability according to claim 6 is characterized in that: The gyro sensor and the soil temperature and humidity sensor are placed crosswise in the slope soil; the outer sides of the sensor assembly and the line are filled with fine sand.

8. The small full-scale test device for simulating slope instability according to claim 1 is characterized in that: The supporting bottom plate is a steel support plate; the lifting support is an electric hydraulic lifting support; and the loading stone is a concrete flexural test block.

9. The small full-scale test device for simulating slope instability according to claim 1 or 8, characterized in that: The lifting supports include three groups that are spaced apart, and each group of lifting supports includes three members that are spaced apart.

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