Loess landslide model test box

Abstract

The invention provides a loess landslide model test box, and relates to the technical field of geotechnical engineering, the loess landslide model test box comprises a box body and a box cover, the box body and the box cover are of an up-and-down covering assembly fixing structure, a test bin is arranged in the box body, a bottom bin, a base plate frame and a slope plate frame are transversely arranged in the test bin in sequence, and the base plate frame and the slope plate frame are on the same horizontal plane; a fall step surface is formed between the bottom bin and the adjacent substrate frame; the model test box has the beneficial effects that the model test box can be combined with a built loess landslide mechanical model to build an actual loess landslide model, and is combined with the test bin in the box body structure to build a loess landslide model in a relative proportion; the slope plate frame, the bottom bin and the base plate frame serve as a bearing structure of the loess landslide model, and the slope plate frame can adjust the slope ratio and slope movement through control to simulate interference of vibration and load factors in an actual loess structure on the loess landslide.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering technology, and specifically to a loess landslide model test chamber. Background Technology

[0002] Loess is a special type of soil widely distributed in northern my country. Natural loess is aeolian, mainly composed of silt-sized particles, with high porosity and good permeability, thus exhibiting water sensitivity and dynamic vulnerability. The Loess Plateau region is influenced by the temperate continental monsoon climate and is mostly located in arid or semi-arid areas, with rainfall showing a seasonal distribution pattern of more in summer and less in winter.

[0003] Every year, various geological disasters occur on the Loess Plateau, causing varying degrees of damage. Loess landslides are a type of geological disaster that causes significant losses to human economic and production activities. In order to facilitate the analysis of loess landslide distance prediction, it is necessary to classify them according to their movement characteristics, namely high-speed long-distance landslides, landslide mudflows, and staggered landslides.

[0004] Existing technologies for building loess landslide models mainly rely on comparative analysis of the kinematic characteristics of loess landslides and the mechanical properties of loess. They combine this with programming to construct mechanical circular arc equations, establish coordinates, and perform back-calculation based on motion trajectory tracking to predict loess landslides. However, the actual prediction calculation structure is limited by the reported data. At actual landslide locations, longitudinal time-lapse and tracking calculations are still needed to assist in the calculation and extrapolation of loess landslides. There are discrepancies between the simulation model data and the extrapolated data from actual landslide locations, which is not conducive to loess landslide prediction. Furthermore, data discrepancies between on-site investigation and data prediction and calculation communication make it inconvenient to conduct actual simulation and extrapolation. Therefore, the construction and extrapolation calculation of existing loess landslide kinematic models have limitations. Summary of the Invention

[0005] To address the aforementioned technical problems in existing technologies, a loess landslide model test chamber is provided.

[0006] The objectives and effects of this invention are achieved by the following specific technical means:

[0007] A loess landslide model test chamber includes a chamber body and a cover. The chamber body and the cover are assembled and fixed as upper and lower covers. A test chamber is opened in the chamber body. A bottom chamber, a base frame and a slope panel frame are arranged horizontally in the test chamber. The base frame and the slope panel frame are on the same horizontal plane. A step surface with a drop is formed between the bottom chamber and the adjacent base frame.

[0008] The slope panel frame consists of multiple pieces, and each pair of adjacent slope panel frames is fastened with a fastening shaft. A pair of support cylinders are symmetrically arranged on both sides of the bottom surface of the slope panel frame. A platform frame is fixed to one end of the support cylinder relative to the slope panel frame, and a support shaft is provided between the support cylinder and the bottom surface of the slope panel frame. The support shaft and the support cylinder are in sliding cooperation.

[0009] The test chamber has side channel boxes fixed to the box body on both sides. There are channel grooves between the side channel boxes and the two ends of the box body. The side channel boxes have horizontal adjustment grooves on their surfaces, and a sliding plate head is slidably installed in the adjustment grooves. The sliding plate head includes an inner pipe and a valve port connected inside and outside. The outer end of the inner pipe is connected to an interface row. There are multiple air ports connected to the channel grooves on the outside of the adjustment grooves.

[0010] A further preferred embodiment: the platform surface of the slope panel frame has an arched structure, and stepped grooves are formed at the junction of the two sides of the slope panel frame and the fastening shaft.

[0011] A further preferred embodiment: the surface of the slope panel frame is evenly distributed with multiple holes, and a simulation box is fixed on the bottom surface of the slope panel frame, wherein a humidity sensor connected to the holes is provided in the simulation box.

[0012] A further preferred embodiment: a control box is embedded on one side of the enclosure, and the control box includes an operation panel screen and a monitoring system.

[0013] A further preferred embodiment: the fastening shaft is a T-shaped bushing structure with vertical sliding combination, and the sliding end of the fastening shaft is fastened and connected to the slope panel frame.

[0014] A further preferred embodiment: a flow sensor is embedded in the inner pipe.

[0015] A further preferred embodiment: a fan unit and a return window are provided on both sides of the channel groove and between the box body, a through groove is provided between the fan unit and the return window, and a connecting pipe is provided between the fan unit and the channel groove.

[0016] A further preferred embodiment: the inner side of the reflux window extends into the test chamber and is provided with a communicating side circulation window, and the side circulation window is a window structure with side gap openings, and the side of the side circulation window is connected to the side channel box.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The loess landslide model test chamber provided by this invention can be used to build actual loess landslide models in conjunction with a constructed loess landslide mechanical model. The test chamber within the chamber structure is used to construct a relatively proportional loess landslide model. The slope panel frame, bottom chamber, and base frame structure serve as the load-bearing structure for the loess landslide model. The slope panel frame can be controlled to adjust the slope ratio and slope activity, simulating the interference of vibration and load factors on loess landslides in actual loess structures. Simultaneously, side passage boxes and passageways are simulated on both sides to construct hydrological conditions, further facilitating the simulation and calculation of loess landslides and improving the practicality of the test chamber. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the side channel box structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal planar structure of the side channel box of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal planar structure of the skateboard head of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection structure between the channel groove and the fan unit of the present invention;

[0024] Figure 6 This is a schematic diagram of the connection structure between the fan unit and the return window of the present invention;

[0025] Figure 7 This is a schematic diagram of the internal planar structure of the slope panel frame of the present invention.

[0026] The markings in the diagram are: 1-Box body; 2-Box cover; 3-Control box; 4-Test chamber; 5-Side circulation window; 6-Side channel box; 7-Bottom chamber; 8-Base plate frame; 9-Slope panel frame; 10-Fan unit; 11-Return window; 12-Interface row; 13-Slide head; 14-Adjustment groove; 15-Air inlet; 16-Inner pipe; 17-Valve port; 18-Water channel groove; 19-Flow sensor; 20-Channel groove; 21-Connecting fitting; 22-Slug groove; 23-Support cylinder; 24-Platform frame; 25-Simulation box; 26-Support shaft; 27-Snap-on shaft. Detailed Implementation

[0027] Please see Figure 1-7 The embodiments of the present invention will be further described below;

[0028] A loess landslide model test chamber includes a box body 1 and a box cover 2. The box body 1 and the box cover 2 are assembled and fixed as upper and lower covers. A test chamber 4 is opened in the box body 1. The test chamber 4 is arranged horizontally in sequence as a bottom chamber 7, a base plate frame 8 and a slope panel frame 9. The base plate frame 8 and the slope panel frame 9 are on the same horizontal plane. A step surface with a drop is formed between the bottom chamber 7 and the adjacent base plate frame 8.

[0029] The slope panel frame 9 is provided with multiple pieces, and each pair of adjacent slope panel frames 9 is fastened with a fastening shaft 27. A pair of support cylinders 23 are symmetrically arranged on both sides of the bottom surface of the slope panel frame 9. A platform frame 24 is fixed to one end of the support cylinder 23 relative to the slope panel frame 9, and a support shaft 26 is provided between the support cylinder 23 and the bottom surface of the slope panel frame 9. The support shaft 26 and the support cylinder 23 are in sliding cooperation.

[0030] The test chamber 4 is provided with side channel boxes 6 fixed to the box body 1 on both sides. A channel groove 20 is provided between the side channel box 6 and the two ends of the box body 1. An adjustment groove 14 is opened horizontally on the surface of the side channel box 6, and a sliding plate head 13 is slidably provided in the adjustment groove 14. The sliding plate head 13 includes an inner pipe 16 and a valve port 17 connected inside and outside. An interface row 12 is connected to the outer end of the inner pipe 16. Multiple air ports 15 connected to the channel groove 20 are provided on the outside of the adjustment groove 14.

[0031] The loess landslide model test chamber's construction of the loess landslide physical model compression ratio is mainly based on the deduction and calculation of the digital model. The loess landslide digital model is constructed by combining slope structure, movement trajectory, elevation data, landslide movement data, and loess samples. Test chamber 4 serves as the model construction space, with the slope panel frame 9 as the high-point construction platform for the loess model, the base frame 8 as the slope extension platform, and the bottom chamber 7 as the drop step recovery space. A cross-sectional model of the loess landslide is constructed within the chamber 1. The slope panel frame 9 is slidably adjustable and telescopically supported by support shaft 26 and support cylinder 23. After the model is constructed, the relative telescopic movement of the support shaft 26 and support cylinder 23 can adjust the slope structure and simulate the inducing factors of loess landslides such as earthquakes and load movements within the loess, allowing for data deduction and simulation of loess landslides. Furthermore, additional support structures are set on both sides of the loess model cross-section. The corresponding side channel box 6 utilizes the horizontally adjustable sliding head 13 on the side channel box 6 to construct a flowing river using the sliding head 13 on both sides in conjunction with the loess model. The two ends of the river are connected to external water sources through the valve port 17 on the surface of the sliding head 13, as well as the internal pipe 16 and interface drain 12, to construct the hydrological conditions of the loess model and improve the landform characteristics of the loess model. At the same time, the air vents 15 distributed on the surface of the side channel box 6 and the internally connected channel grooves 20 can be used to simulate airflow to meet the requirements of loess landslide model simulation and calculation. This provides an experimental model for subsequent actual data deduction and experimentation of loess landslide digital model, and improves the practicality of the test box.

[0032] Furthermore, the platform surface of the slope panel frame 9 has an arched structure, and stepped grooves are formed at the junction of the two sides of the slope panel frame 9 and the fastening shaft 27. The arched structure of the slope panel frame 9 and the stepped grooves formed at the junction of the slope panel frame 9 and the fastening shaft 27 serve as an isolation structure between multiple slope panel frames 9, facilitating the longitudinal adjustment of a single slope panel frame 9 and avoiding the problem of excessive height difference movement of the slope panel frame 9 affecting the stability of the loess model.

[0033] Furthermore, the slope panel frame 9 has multiple holes evenly distributed on its surface, and a simulation box 25 is fixed on the bottom surface of the slope panel frame 9. A humidity sensor connected to the holes is installed in the simulation box 25. Real-time soil moisture monitoring can be carried out by connecting the humidity sensor in the simulation box 25 through the internal holes, so as to improve the monitoring range of the loess landslide model test box and the landslide induction data that can be deduced and calculated.

[0034] Based on the above, a control box 3 is embedded on one side of the housing 1. The control box 3 includes an operation panel and a monitoring system. The test chamber is based on PLC control and mainly uses the operation panel and the monitoring system to connect the above sensors and record sensor data.

[0035] like Figure 7 As shown, the fastening shaft 27 is a T-shaped bushing structure with vertical sliding combination, and the sliding end of the fastening shaft 27 is fastened and connected to the slope panel frame 9. The fastening shaft 27 structure is adjustable and is used in conjunction with the stepped groove formed between it and the slope panel frame 9. The fastening shaft 27 adapts to the height difference structure of the two slope panel frames 9 by sliding, and the fastening shaft 27 is connected to the slope panel frame 9 on this basis to ensure the stability of the structure between the slope panel frames 9.

[0036] Furthermore, a flow sensor 19 is embedded in the inner pipe 16. The flow sensor 19 in the inner pipe 16 collects and records the flow data of the river model flowing between the two sliding head 13, so as to provide data support for the deduction and calculation of the loess landslide model.

[0037] Based on the above, fan units 10 and return windows 11 are provided on both sides of the channel trough 20 and between the box body 1. A through slot 22 is provided between the fan unit 10 and the return window 11, and a connecting pipe 21 is provided between the fan unit 10 and the channel trough 20. The airflow construction of this loess landslide model test chamber is mainly based on the operation of the fan unit 10 to blow air in the corresponding direction. The blowing method is mainly to enter the interior along the outside of the fan unit 10, flow through the connecting pipe 21, the channel trough 20 and the air inlet 15 in sequence, and finally flow out from the channel trough 20, the through slot 22 and the return window 11 on the other side, so as to create a circulation environment in the test chamber 4 and provide a simulateable airflow environment for the data extrapolation of the loess landslide model.

[0038] Among them, the inner side of the return window 11 extends into the test chamber 4 and is provided with a communicating side circulation window 5. The side circulation window 5 is a window structure with side gap openings, and the side of the side circulation window 5 is connected to the side channel box 6. The side circulation window 5 can form an internal airflow circulation between the return windows 11, and thus, when the fan unit 10 is not working, it serves as a simulation of relatively static airflow to improve the loess model environment.

Claims

1. A loess landslide model test chamber, comprising a chamber body (1) and a chamber cover (2), wherein the chamber body (1) and the chamber cover (2) are an upper and lower cover assembly and fixing structure, characterized in that: The box (1) has a test chamber (4) in which a bottom chamber (7), a base plate frame (8) and a slope panel frame (9) are arranged horizontally in sequence. The base plate frame (8) and the slope panel frame (9) are on the same horizontal plane. A step surface with a drop is formed between the bottom chamber (7) and the adjacent base plate frame (8). The slope panel frame (9) is provided in multiple pieces, and each pair of adjacent slope panel frames (9) is fastened with a fastening shaft (27). A pair of support cylinders (23) are symmetrically arranged on both sides of the bottom surface of the slope panel frame (9). A platform frame (24) is fixed to one end of the support cylinder (23) relative to the slope panel frame (9), and a support shaft (26) is fixed between the support cylinder (23) and the bottom surface of the slope panel frame (9). The support shaft (26) and the support cylinder (23) are in sliding cooperation. The test chamber (4) is provided with side channel boxes (6) fixed to the box body (1) on both sides. A channel groove (20) is provided between the side channel box (6) and the two ends of the box body (1). An adjustment groove (14) is opened horizontally on the surface of the side channel box (6), and a sliding plate head (13) is slidably provided in the adjustment groove (14). The sliding plate head (13) includes an inner pipe (16) and a valve port (17) connected inside and outside. An interface row (12) is connected to the outer end of the inner pipe (16). Multiple air ports (15) connected to the channel groove (20) are provided on the outside of the adjustment groove (14).

2. The loess landslide model test chamber according to claim 1, characterized in that: The platform surface of the slope panel frame (9) has an arched structure, and stepped grooves are formed at the junction of the two sides of the slope panel frame (9) and the fastening shaft (27).

3. The loess landslide model test chamber according to claim 1, characterized in that: The slope panel frame (9) has multiple holes evenly distributed on its surface, and a simulation box (25) is fixed on the bottom surface of the slope panel frame (9). A humidity sensor connected to the holes is installed in the simulation box (25).

4. The loess landslide model test chamber according to claim 1, characterized in that: The control box (3) is embedded in one side of the housing (1), and the control box (3) includes an operation panel screen and a monitoring system.

5. The loess landslide model test chamber according to claim 1, characterized in that: The fastening shaft (27) is a T-shaped bushing structure with vertical sliding combination, and the sliding end of the fastening shaft (27) is fastened and connected to the slope panel frame (9).

6. The loess landslide model test chamber according to claim 1, characterized in that: A flow sensor (19) is embedded in the inner pipe (16).

7. The loess landslide model test chamber according to claim 1, characterized in that: A fan unit (10) and a return window (11) are provided on both sides of the channel groove (20) and between the box body (1). A through groove (22) is provided between the fan unit (10) and the return window (11), and a connecting pipe (21) is provided between the fan unit (10) and the channel groove (20).

8. The loess landslide model test chamber according to claim 1, characterized in that: The reflux window (11) extends into the test chamber (4) and is provided with a communicating side circulation window (5). The side circulation window (5) is a window structure with side gap openings, and the side of the side circulation window (5) is connected to the side channel box (6).

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