Visual test device for soil arching effect of reservoir landslide anti-slide pile

Abstract

The utility model relates to a reservoir landslide anti-slide pile soil arching effect visualization test device, which comprises a model box, a simulation bedrock layer, a simulation pile, a soil body, a loading system, an image acquisition system and a water level control system, the simulation bedrock layer is arranged at the inner bottom of the model box, the soil body is arranged on the simulation bedrock layer, the simulation pile is anchored at the upper end of the simulation bedrock layer, and the loading system is connected with the image acquisition system. The upper part of the simulation pile is embedded in a slope surface of a soil body, the loading system is in contact with the other end of the soil body and is used for loading a transverse force, the image acquisition system is used for acquiring image data of the soil body and the simulation pile, a plurality of groups of soil pressure measurers are arranged in the soil body, one side, close to the loading system, of the simulation pile is provided with a soil pressure measurer, and the water level control system is arranged on the model box. And moisture detectors are arranged at different depths in the soil body. The device has the advantages that the structural design is reasonable, complex working conditions in actual engineering can be simulated more accurately, and the practicability of the test device and the reliability of test results are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of soil mechanics and geotechnical engineering, especially to a visual test device for soil arching effect of reservoir landslide anti -sliding pile. BACKGROUND

[0002] Soil arching effect is an important mechanical phenomenon in the field of geotechnical engineering, which widely exists in the interaction of various soil and structures. The research of this phenomenon is of great significance for understanding the deformation mechanism of soil under load, stress redistribution of soil and stability of supporting structure. In recent years, with the rapid development of infrastructure construction, the research of soil arching effect has gradually attracted attention, especially in reservoir landslide anti -sliding pile, foundation pit support and tunnel excavation engineering.

[0003] According to patent CN117071649A, the T-shaped pile soil arching effect experimental device provides a new experimental method, which can measure soil pressure and strain by simulating the soil arching effect of T-shaped pile in the model box. This device is designed to simulate the landslide thrust on the supporting pile in real situation, and has the advantages of simple operation and repeatable operation. However, there are still many deficiencies, such as the existing technology is difficult to simulate the complex boundary conditions and various working conditions in actual engineering, such as seepage, uneven settlement, etc.

[0004] According to patent CN202210935373.2, the visual test device and method for soil arching effect of reservoir landslide anti -sliding pile provide a new experimental method, which can directly observe the displacement and deformation of soil particles under load by simulating soil arching effect in the model box. This device is designed to simulate the soil pressure on the supporting pile in actual engineering, and has the advantages of simple operation and repeatable operation. However, there are still some deficiencies, although the use of fluorescent material improves the visualization effect, but it may not fully reflect the physical and mechanical properties of soil, and there may be a problem of uneven mixing of fluorescent material and soil particles in actual operation.

[0005] Therefore, in view of the problem that the model box in the prior art is difficult to simulate the complex boundary conditions and various working conditions in actual engineering, such as seepage and instability phenomenon of slope under the action of sliding force, a visual test device for soil arching effect of reservoir landslide anti -sliding pile is needed. UTILITY MODEL CONTENT

[0006] The technical problem to be solved by the utility model is to provide a visual test device for soil arching effect of reservoir landslide anti -sliding pile, which effectively overcomes the defects of the prior art.

[0007] The technical solution of the utility model to solve the above technical problem is as follows:

[0008] The utility model provides a kind of visualization test device of reservoir landslide anti-slide pile soil arch effect, including model box, simulation bedrock layer, simulation pile, soil body, loading system, image acquisition system and water level control system, the simulation bedrock layer is set in the bottom of the model box, the soil body is set on the simulation bedrock layer, and one end forms slope, the simulation pile is provided with multiple, and is arranged in a row along the vertical interval of the both sides of the model box, the simulation pile is anchored on the upper end of the simulation bedrock layer, and upper part is embedded in the slope of the soil body, and top is exposed, the loading system is in contact with the other end of the soil body, for loading the force along the slope direction of soil body, the image acquisition system is used to collect the image data of soil body and simulation pile, the soil pressure measurer is spaced apart between the both ends in the soil body, and the side of the simulation pile close to loading system is also respectively provided with soil pressure measurer, the water level control system is installed on model box, for controlling the water level in the model box, and water detector is provided in the soil body at different depths.

[0009] On the basis of the above technical solution, the utility model can also be improved as follows.

[0010] Further, the upper part of the simulation bedrock layer is provided with a slope surface, and the soil body is arranged on the slope surface.

[0011] Further, the simulation bedrock layer is a concrete masonry layer.

[0012] Further, the simulation pile is a concrete pouring pile.

[0013] Further, the soil pressure measurer is a soil pressure cell.

[0014] Further, the loading system comprises a jack and a loading plate, the loading plate is vertically attached to the other end of the soil body, the jack is installed on the inner wall of the other end of the model box, the telescopic end of the jack is connected with the loading plate perpendicularly, and a force sensor is arranged between the jack and the loading plate.

[0015] Further, the image acquisition system comprises a camera and a computer, the camera is arranged above the model box and connected with the computer, and the computer is further connected with the force sensor, the soil pressure measurer and the water detector.

[0016] Further, the water level control system comprises a water tank, the water tank is installed on the upper part of the outer wall of one end of the model box, the lower end of the water tank is communicated with the space above the simulation bedrock layer in the model box through a water pipe, a first flow control valve and a first on-off valve are arranged on the water pipe, a drainage branch pipe is arranged at the lower end of the water pipe, a second flow control valve and a second on-off valve are arranged on the drainage branch pipe.

[0017] Further, the first flow control valve, the first on-off valve, the second flow control valve and the second on-off valve are electrically controlled valves, and are connected with the controller respectively, and the controller is connected with the computer.

[0018] Further, the slope surface of the soil body is provided with a plurality of groups of exposed displacement monitoring markers at intervals between two ends thereof, the soil body is provided with a plurality of groups of at intervals between two ends thereof, and the soil body is provided with a plurality of pore water pressure gauges at intervals between two ends thereof.

[0019] The beneficial effects of the utility model are: the structure design is reasonable, can simulate the complex working condition in actual engineering more accurately, improves the practicality of test device and the reliability of test result. It is helpful to understand the behavior of soil arching effect under complex boundary conditions in depth, and provides more scientific basis for the design and maintenance of slope engineering. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structure schematic view of the visual test device for soil arching effect of reservoir landslide anti-slide pile of the utility model;

[0021] Figure 2 It is the structure plan view of the visual test device for soil arching effect of reservoir landslide anti-slide pile of the utility model.

[0022] In the drawing, the component list represented by each sign is as follows:

[0023] 1, model box;2, simulate bedrock layer;3, simulate pile;4, soil body;5, loading system;6, soil pressure measurer;7, water tank;51, jack;52, loading plate. DETAILED DESCRIPTION

[0024] The principle and characteristics of the utility model are described below in combination with the drawing, and the examples are only used for explaining the utility model, and are not used for limiting the range of the utility model.

[0025] Embodiment: as Figure 1 , 2As shown, the visualization test device for soil arching effect of reservoir landslide anti-slide pile of the embodiment includes a model box 1, a simulated bedrock layer 2, simulated piles 3, a soil body 4, a loading system 5, an image acquisition system, and a water level control system. The simulated bedrock layer 2 is arranged at the bottom of the model box 1, the soil body 4 is arranged on the simulated bedrock layer 2 and has a slope at one end, the simulated piles 3 are arranged in a row along the vertical and spaced sides of the model box 1, the simulated piles 3 are anchored at the upper end of the simulated bedrock layer 2 and are embedded in the slope of the soil body 4 with the upper part exposed, the loading system 5 is in contact with the other end of the soil body 4 for loading force along the slope direction of the soil body, the image acquisition system is used to acquire image data of the soil body 4 and the simulated piles 3, the soil pressure measuring devices 6 are arranged in multiple groups at intervals between the two ends of the soil body 4, and the soil pressure measuring devices 6 are also arranged on the side of the simulated piles 3 close to the loading system 5, the water level control system is arranged on the model box 1 for controlling the water level in the model box 1, and the moisture detectors d (moisture content meters can be used) are arranged at different depths in the soil body 4.

[0026] After the visualization test device for soil arching effect of reservoir landslide anti-slide pile of the embodiment is assembled, the test is started, the loading system 5 is used to apply transverse force to the simulated piles 3 and monitor the changes of force and displacement, the loading system 5 is used to apply force to simulate the sliding force of the slope, and the stability of the slope under different sliding forces is studied; the water level control system is used to control the water level in the model box 1, specifically, water is added to a certain water level and then drained, and the water level is reciprocated to simulate the erosion of the slope by the water level, so that the influence of the water level erosion on the slope under a certain sliding force can be simulated. At the same time, the image acquisition system is used to record the displacement and deformation of the soil particles and the simulated piles 3 during the test process, and the acquired image data is stored and processed, and simultaneously, the soil pressure measuring devices 6 are used to acquire the pressure change data of different regions in the soil body 4 and the pile body itself. According to the above data, the soil arching effect related test changes can be obtained. The overall structure is reasonably designed, the complex working conditions in actual engineering can be more accurately simulated, the practicability of the test device and the reliability of the test results are improved. It is helpful to deeply understand the behavior of soil arching effect under complex boundary conditions, and provides a more scientific basis for the design and maintenance of slope engineering.

[0027] In the embodiment, the soil pressure measuring devices 6 distributed at different positions are used to observe the soil pressure change of the slope body at different positions and the simulated piles 3 under the action of reservoir water level fluctuation and thrust. By monitoring the soil pressure change of each point, the peak value of the soil pressure is used to judge the time when the soil arching effect is the most powerful and the time when the soil arching effect fails. Note: As the water level repeatedly erodes the slope, the soil body is gradually weakened to a certain extent, which gradually leads to the damage of the anti-slide pile body and the failure of the anti-slide effect.

[0028] In this embodiment, three moisture content sensors are arranged in the three regions between the two ends of the soil body 4 (which can be the front, middle and rear regions). The moisture content is monitored by the water detector. Note that due to the periodic fluctuations of the reservoir water level and the landslide thrust, the moisture content of the soil body changes, the internal friction angle and cohesion of the soil body weaken, and the balance condition of the soil arch is destroyed, resulting in loss and damage of the soil arch effect.

[0029] In this embodiment, a slope surface is arranged on the upper part of the simulated bedrock layer 2, and the soil body 4 is arranged on the slope surface to form the slope surface of the soil body 4.

[0030] In this embodiment, the simulated bedrock layer 2 is formed by concrete masonry.

[0031] In this embodiment, the simulated pile 3 is formed by pouring special concrete, and specifically C10 concrete can be poured.

[0032] In this embodiment, the soil pressure measuring device 6 is a soil pressure cell of a suitable model, which can be arranged in multiple, uniformly spaced positions in the soil body 4, or arranged in multiple, vertically spaced positions on the side end of the simulated pile 3.

[0033] As a preferred embodiment, the loading system 5 includes a jack 51 and a loading plate 52, the loading plate 52 is vertically attached to the other end of the soil body 4, the jack 51 is mounted on the inner wall of the other end of the model box 1, the extension end of the jack 51 is connected to the loading plate 52 vertically, and a force sensor is arranged between the two.

[0034] In the above embodiment, the jack 51 applies a transverse thrust to the loading plate 52, so that the loading plate 52 acts on the other end of the soil body 4 to form a loading force on the soil body 4, which is monitored in real time by the force sensor. The feedback data of the pressure sensor can be used to flexibly control the loading rate and the thrust size. The structure design is relatively simple, and the force loading is relatively stable.

[0035] As a preferred embodiment, the image acquisition system includes a camera (denoted by A in the figure) and a computer, the camera is arranged above the model box 1 and connected to the computer, and the computer is also connected to the force sensor, the soil pressure measuring device 6 and the water detector.

[0036] In the above embodiment, the real-time shooting of the test process by the camera arranged at a high position can collect the displacement changes of the soil body 4 before, during and after the test and the displacement changes of the simulated pile 3, and the computer can compare the displacement changes. By using conventional data processing methods, the displacement change data of the soil body 4 before and after the test and the simulated pile 3 can be obtained. The computer can integrate existing image data acquisition and processing software (many mature processing technologies exist in the prior art, which will not be described here) to help faster data processing.

[0037] As a preferred embodiment, the water level control system comprises a water tank 7 arranged on the upper portion of the outer wall of one end of the model box 1, the lower end of the water tank 7 is communicated with the space above the corresponding simulated bedrock layer 2 in the model box 1 through a water pipe, and the water pipe is provided with a first flow control valve and a first on-off valve. The lower end of the water pipe is provided with a drainage branch pipe, and the drainage branch pipe is provided with a second flow control valve and a second on-off valve.

[0038] In the above embodiment, by opening the first on-off valve and adjusting the first flow control valve, the state and flow rate of the water entering the model box 1 can be controlled, so that the water level in the soil body 4 can be controlled. At the same time, after the first on-off valve is closed, the second on-off valve can be opened and the second flow control valve can be adjusted to control the water level and flow rate in the model box 1, so that the water level in the model box 1 can be controlled. Overall, the high water tank 7 and the on-off valve can be used to achieve the design, which is very simple and convenient to operate.

[0039] In the embodiment, the first flow control valve, the first on-off valve, the second flow control valve and the second on-off valve are electric control valves, and are respectively connected with the controller, and the controller is connected with the computer. The controller can realize the opening and closing and adjustment of the valves, and realize the automatic control operation.

[0040] In the embodiment, the slope surface of the soil body 4 is arranged with a plurality of groups of exposed displacement monitoring markers m (soil nails can be used) at intervals between the two ends, and a plurality of groups of pore water pressure gauges n are arranged in the soil body 4 at intervals between the two ends. The displacement changes of the plurality of groups of displacement monitoring markers m during the test process are detected by the image acquisition system, which can directly reflect the displacement changes of the soil landslide. At the same time, the design of the plurality of pore water pressure gauges n can observe the pore water pressure changes of the slope body at different positions and around the simulated pile 3 under the action of the reservoir water level fluctuation and the pushing force. By monitoring the pore water pressure, the slope body is affected by the periodic fluctuation of the reservoir water level and the pushing force of the landslide, and the influence of the reservoir water level on each part of the slope body is judged, which provides help for the study of the slope stability.

[0041] In the embodiment, the model box 1 is made of transparent tempered glass. The tester can observe the operation state of the internal soil body 4 and the loading system 5 outside the model box 1, so as to control the whole test process.

[0042] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0044] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In the present application, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0046] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0047] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A visualization test device for the soil arching effect of anti-slide piles in reservoir landslides, characterized by: The invention comprises a model box (1), a simulated bedrock layer (2), simulated piles (3), a soil body (4), a loading system (5), an image acquisition system and a water level control system, wherein the simulated bedrock layer (2) is arranged at the bottom of the model box (1), the soil body (4) is arranged on the simulated bedrock layer (2), and a slope is formed at one end, a plurality of simulated piles (3) are provided, and are arranged in a row at intervals and vertically along both sides of the model box (1), the simulated piles (3) are anchored at the upper end of the simulated bedrock layer (2), and the upper part is buried in the slope of the soil body (4), and the top is exposed. The loading system (5) contacts the other end of the soil (4) and is used to load a force along the slope direction of the soil (4). The image acquisition system is used to collect image data of the soil (4) and the simulation pile (3). Multiple groups of soil pressure measuring devices (6) are arranged at intervals between the two ends of the soil (4). The simulation pile (3) is also provided with soil pressure measuring devices (6) on the side close to the loading system (5). The water level control system is installed on the model box (1) and is used to control the water level in the model box (1). Moisture detectors are provided at different depths in the soil (4).

2. A visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to claim 1, characterized in that: A slope surface is provided on the upper portion of the simulated bedrock layer (2), and the soil body (4) is arranged on the slope surface.

3. The visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to claim 1, characterized in that: The simulated bedrock layer (2) is a concrete masonry layer.

4. The visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to claim 1, characterized in that: The simulated pile (3) is a concrete pouring pile.

5. The visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to claim 1, characterized in that: The soil pressure measuring device (6) is a soil pressure box.

6. A visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to any one of claims 1 to 5, characterized in that: The loading system (5) includes a jack (51) and a loading plate (52). The loading plate (52) is vertically attached to the other end of the soil (4). The jack (51) is installed on the inner wall of the other end of the model box (1). The telescopic end of the jack is vertically connected to the loading plate (52), and a force sensor is provided between the two.

7. The visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to claim 6, characterized in that: The image acquisition system comprises a camera and a computer. The camera is mounted above the model box (1) and connected to the computer. The computer is also connected to the force sensor, the earth pressure measuring device (6) and the moisture detector.

8. The visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to claim 7, characterized in that: The water level control system comprises a water tank (7), which is mounted on the upper portion of the outer wall of one end of the model box (1), and the lower end of the water tank (7) is connected to the space above the corresponding simulated bedrock layer (2) in the model box (1) through a water pipe, and the water pipe is provided with a first flow control valve and a first switch valve, and the lower end of the water pipe is provided with a drainage branch pipe, and the drainage branch pipe is provided with a second flow control valve and a second switch valve.

9. A visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to claim 8, characterized in that: The first flow control valve, the first switch valve, the second flow control valve and the second switch valve are all electrically controlled valves and are respectively connected to a controller, and the controller is connected to the computer.

10. A visualization test device for soil arching effect of anti-slide piles in reservoir landslides according to any one of claims 1 to 5, characterized in that: The slope surface of the soil body (4) is provided with multiple groups of exposed displacement monitoring markers buried at intervals between its two ends, and the soil body (4) is provided with multiple groups of exposed displacement monitoring markers buried at intervals between its two ends. The soil body (4) is provided with multiple pore water pressure gauges buried at intervals between its two ends.

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