CN216527722U - Experimental device for rainfall simulation and groundwater bidirectional permeation induce landslide - Google Patents
Experimental device for rainfall simulation and groundwater bidirectional permeation induce landslide Download PDFInfo
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- CN216527722U CN216527722U CN202122715636.2U CN202122715636U CN216527722U CN 216527722 U CN216527722 U CN 216527722U CN 202122715636 U CN202122715636 U CN 202122715636U CN 216527722 U CN216527722 U CN 216527722U
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Abstract
The utility model discloses an experimental device for simulating rainfall and underground water bidirectional seepage induced landslide. The rainfall device comprises a bearing frame, wherein the bearing frame is hinged with the right end of the bottom of a model device box through a hinge device, the left end of the bottom of the model device box is connected with a hoist device, the hoist device is connected with an integral frame, the top of the model device box is arranged in an opening manner, and a rainfall device is arranged above the model device box; an experimental slope model is stacked in the model device box, and a groundwater infiltration device is arranged at the bottom of the experimental slope model; and a data monitoring sensor is embedded in the experiment slope model. The utility model can simulate the underground water infiltration and rainfall infiltration bidirectional infiltration conditions, can adjust the angle of the model device and the like, and can realize the landslide physical model experiment under the influence of multiple factors.
Description
Technical Field
The utility model relates to the technical field of slope rock-soil body hydrological parameter and mechanical strength index evolution, in particular to an evolution process and mechanism for slope destruction under the condition of underground water seepage and rainfall infiltration bidirectional infiltration in a karst area; the device for researching the influence of different factors on the hydrological response characteristic rule of the downhill slope body can be realized by changing the initial conditions of the model, and particularly the experimental device for simulating rainfall and underground water bidirectional infiltration induced landslide is provided.
Background
In recent years, in southwest karst areas, due to complex engineering geological conditions and abundant annual rainfall, large and small landslide disasters occur every year, such as 6.28 green landslide in 2010, 7.23 great landslide in water city in 2019 and 8.3 pine peach and ganlong landslide in 2020, and the disasters seriously harm the lives and properties of local residents. However, landslide disasters in karst mountain areas have the characteristics of complex pregnancy disaster mechanism, wide disaster causing range, high early identification difficulty, strong burstiness and the like. At present, scholars at home and abroad have little research on the landslide, and mainly focus on the bank landslide caused by the rise and fall of the water level of the bank. And the research on the existence of potential underground water level in the karst area to induce landslide under the condition of heavy rainfall is slightly immature.
Landslide disasters are one of the most easily-occurring natural disasters with great destructive power, so that the fact that the inducing mechanism and the evolution process of the disasters are very important for evaluating the landslide easily-occurring area is clarified, and the experimental device for simulating rainfall and underground water bidirectional permeation to induce landslides has practical significance for the research on the landslides.
Disclosure of Invention
The utility model aims to provide an experimental device for simulating rainfall and underground water bidirectional permeation to induce landslide. The utility model can simulate the underground water infiltration and rainfall infiltration bidirectional infiltration conditions, can adjust the angle of the model device and the like, and realizes the landslide physical model experiment under the influence of multiple factors.
The technical scheme of the utility model is as follows: the utility model provides an experimental apparatus of landslide is induced in two-way infiltration of rainfall simulation and groundwater which characterized in that: the rainfall device is arranged above the model device box; an experimental slope model is arranged in the model device box, and a groundwater infiltration device is arranged at the bottom of the experimental slope model; and a data monitoring system is arranged in the experiment slope model.
In the experimental device for simulating rainfall and underground water bidirectional permeation to induce landslide, the rainfall device comprises a rainfall sprayer arranged above a model device box, a flowmeter is connected through a water pipe, and a rainfall simulation water supply tank is connected behind a water pump.
In the experimental device for simulating rainfall and underground water bidirectional permeation to induce landslide, the underground water infiltration device comprises a bedrock fissure water supply device arranged on a bottom plate of a model box of an experimental slope model, the bedrock fissure water supply device is composed of PVC pipes arranged at the bottom of the experimental slope model, and holes are formed in the PVC pipes.
In the experimental device for simulating rainfall and underground water bidirectional permeation to induce landslide, the model device box is provided with an underground water inlet hole; the bedrock fracture water supply device is connected with an underground water inlet hole, the underground water inlet hole is connected with a water pipe, and the water pipe is connected with an underground water supply tank.
In the experimental device for simulating rainfall and underground water bidirectional permeation to induce landslide, the underground water feed tank is provided with the water overflow outlets at different heights and at equal intervals at one side, the water overflow outlets are connected with the water pipe, and the water pipe is connected with the water valve.
In the experimental device for simulating rainfall and underground water bidirectional infiltration induced landslide, the model device box is provided with a pressure measuring pipe hole; the data monitoring system comprises a pressure measuring pipe arranged in the experimental slope model and connected with a pressure measuring pipe hole, the pressure measuring pipe is connected with a sensor, the sensor is connected with a data acquisition unit, and the data acquisition unit is connected with a display.
In the experimental device for simulating rainfall and groundwater bidirectional infiltration induced landslide, the sensors include a group of sensors buried at different heights in the experimental slope model.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model has relatively simple integral structure, no complex parallel connection relation among the structures, no mutual influence among the units during installation, and conventional raw materials, easy acquisition and considerable price.
2. One end of the model device box is hinged, and the other end of the model device box is hinged by a chain block, so that the angle of the model device box can be changed conveniently, and the stability of the model device box is better.
3. The device for simulating groundwater water supply adopts PVC pipe open pore, and bonds nylon filter screen, controllable scope and size of groundwater water supply, and prevented from destroying slope structure due to impact of water flow, more true reflection the infiltration mode of bedrock fracture water.
4. The utility model can realize the conditions of groundwater infiltration and rainfall infiltration in two directions, and can be used for researching the evolution characteristics of the slope body, the motion process of the slope body and the hydrological response characteristics under the conditions.
5. The utility model can realize the research of the influence of different hydraulic gradient infiltration on the change of hydrological parameters in the slope body through different water overflow outlets designed on the underground water supply device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a pressure tube hole arrangement of the present invention;
FIG. 3 is a schematic structural view of the pressure measuring tube of the present invention;
FIG. 4 is a schematic structural view of a simulated bedrock fracture water supply of the present invention;
fig. 5 is a schematic view of the construction of the hoist assembly and integral frame of the present invention;
FIG. 6 is a schematic view of the construction of the mould unit case with the carrying frame and the hinge arrangement of the utility model;
FIG. 7 is a schematic diagram of a groundwater feed tank.
The labels in the figures are: 1-model device box, 2-bearing frame, 3-integral frame, 4-underground water supply box, 5-data collector, 6-display, 7-rainfall simulation supply box, 8-water pump, 9-flowmeter, 10-model box bottom plate, 11-bedrock fissure water supply device, 12-underground water inlet hole, 13-pressure pipe hole, 14-sensor, 15-experimental slope model, 16-pressure pipe, 17-hinge device, 18-gourd device, 19-rainfall spray head, and 20-water valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Examples are given. An experimental device for simulating rainfall and groundwater bidirectional infiltration induced landslide is shown in figures 1-6 and comprises a bearing frame 2, wherein the bearing frame is hinged with the right end of the bottom of a model device box 1 through a hinge device 17, the left end of the bottom of the model device box 1 is connected with a hoist device 18, the hoist device 18 is connected with an integral frame 3, the top of the model device box 1 is provided with an opening, and a rainfall device is arranged above the model device box 1; an experimental slope model 15 is arranged at the left part of the model device box 1, and a groundwater infiltration device is arranged at the bottom of the experimental slope model 15; and a data monitoring system is arranged in the experimental slope model 15.
The integral frame 3 comprises, in addition to the frame on which the hoist device 18 is mounted, other necessary frames such as: the auxiliary frame for installing the rainfall device, the frame for installing the underground water supply tank and the like are made of stainless steel materials.
The bearing frame 2 is built by a plurality of steel materials, and one end of the bearing frame is connected with two corners at one side of the model box in a hinged mode.
The hoist device 18 is preferably a chain block, the left end of the bottom of the model device box 1 is connected with the hoist device 18 through an iron chain, and through the matching of the iron chain and the chain block, only one end of the model box needs to be pulled up, so that the slope gradient can be changed.
Preferably, the left side, the right side and the rear side of the model device box 1 are made of acrylic materials; the bottom surface is made of a steel plate and is provided with a water inlet hole; the front side and the top surface are provided with openings, and the acrylic plate and the steel plate are sealed by enough glass cement, so that the model box is ensured to be watertight. The mould device case 1 can be pivoted on the carrying frame 2 by means of the hinge means 17.
The rainfall device comprises a rainfall spray head 19 arranged above the model device box 1, a flowmeter 9 is connected through a water pipe, and a rainfall simulation water supply tank 7 is connected behind a water pump 8. The rainfall simulation water supply tank 7 for providing rainfall pumps water through a water pump 8, and is connected with a flowmeter 9, and the water pump 8 is used for keeping the stability of water supply pressure; the flowmeter 9 is used for matching with the rainfall spray head 19 so as to realize the control of rainfall intensity.
The underground water infiltration device comprises a bedrock fissure water supply device 11 arranged on a model box bottom plate 10 of an experimental slope model 15, wherein the bedrock fissure water supply device 11 is composed of PVC pipes arranged at the bottom of the experimental slope model 15, and holes are formed in the PVC pipes. Basement rock crack water supply installation 11 all adopts the PVC material preparation, and elbow department adopts PVC elbow and three-way pipe connection to arrange a plurality of holes at the PVC pipe, every pipe is stained with the nylon filter screen that the diameter is 0.075 mm.
The model device box 1 is provided with an underground water inlet hole 12; the bedrock fracture water supply device 11 is connected with an underground water inlet hole 12, the underground water inlet hole 12 is connected with a water pipe, and the water pipe is connected with an underground water supply tank 4. A water valve is arranged on the water pipe.
The underground water supply tank 4 is made of acrylic materials, a plurality of water overflow outlets are arranged at different heights on one side of the tank body at equal intervals, a water pipe and a water valve are installed, the water head height of the simulated underground water is controlled, and the adjustment of the intensity of the underground water and different hydraulic gradients is realized.
Preferably, the size of the groundwater inlet hole 12 of the body of the groundwater feed tank 4 is the same as the diameter of the PVC pipe of the bedrock fracture water feed device 11, and a three-way pipe passes through the hole and is sealed by glass cement.
The model device box 1 is provided with a pressure measuring pipe hole 13; the data monitoring system includes sensors 14 embedded in an experimental ramp model 15 for monitoring ramp hydrological parameters. The pressure measuring pipe 16 is connected with the pressure measuring pipe hole 13, the sensor 14 is embedded through a prefabricated hole with the aperture slightly larger than that of the pressure measuring pipe 13, the sensor 14 is connected with the data acquisition unit 5, and the data acquisition unit 5 is connected with the display 6. The display 6 is connected with a data acquisition system (data acquisition unit 5) and is used for checking and storing experimental data.
Preferably, the sensor 14 includes a volumetric water content sensor ECH2OEC-5 manufactured by METER, a matrix suction sensor TEROS21 manufactured by METER, and a pore water pressure sensor HC-25 manufactured by Beijing Rui Hengchangtai science and technology Limited. In the experimental process, the sensor 14 responds due to the increase of the water content in the slope body, the volume water content and the pore water pressure tend to rise along with the increase of the water content, and the matrix suction force tends to fall according to the effective stress principle. From data analysis of experimental collection, the data change monitored by the sensor basically accords with the change trend of theoretical analysis.
Preferably, data collector 5 is a Campbell product, model CR 1000X. Its advantages are: high resolution measurements (24 bit Adc), even small variations in data values can be distinguished; the micro SD card driver is included, and the expanded storage requirements can be met. The collector 5 is connected with the sensor 14 and is connected with a display for acquiring the data collected by the sensor 14. In this embodiment, the acquisition frequencies of the acquirer are 1Hz and 20Hz, and this embodiment adopts the acquisition frequency of 1 Hz.
The display 6 can meet the experimental requirements by directly using a notebook computer, can realize real-time query and storage of the acquired data through related software, and can finish data transmission by using external storage.
Preferably, the pressure-measuring pipe 16 is made of acrylic materials and is installed on one side of the model device box 1, the pressure-measuring pipe holes 13 are arranged at equal intervals, a plurality of rows of pressure-measuring pipe holes 13 are preset, the elbow of the pressure-measuring pipe 16 is connected through PVC (polyvinyl chloride) elbows, and the stability of the joint and the later-stage experiment seepage are guaranteed not to be subjected to any resistance.
The sensors 14 comprise a set of sensors arranged at different heights in an experimental ramp model 15.
The implementation process of the utility model is as follows:
firstly, a model device box 1 is flatly placed on a bearing frame 2, a bedrock fracture water supply device 11 is placed at the bottom of the model device box 1, secondly, prepared soil samples are filled in layers to pile up slopes, each layer is filled, the bedding surface is leveled, and an experimental slope model 15 is gradually formed. Note that when the sensors 14 are filled in place, the sensors are lightly placed on the floor to prevent damage to the sensors. After the experimental slope model 15 is filled, the model device box 1 is connected with the hoist device 18, the inclination angle of the model device box is changed, and the experimental design gradient is achieved and fixed. Secondly, carrying out rain sheltering treatment on the molding experiment slope model 15, turning on the water pump 8 and the flowmeter 9, adjusting the number of the rainfall spray nozzles 19 to achieve the designed rainfall intensity, and making a relation between the rainfall intensity and the flowmeter 9 and the rainfall spray nozzles 19 to facilitate later-stage experiments; injecting water into the underground water supply tank 4 to enable the underground water supply tank to reach a preset water head position, opening a water valve at the bottom of the underground water supply tank 4, adjusting the relation between water supply and water discharge, and enabling the water head position to keep a constant water head; camera equipment is erected at one side of the model device box 1 and at a reasonable position of the slope surface and used for recording the experimental process and providing image data for later-stage experimental result analysis; after the early preparation work is debugged, the data acquisition condition is checked through the display 6, after the data acquisition is confirmed to be normal, the water pump 8 and the flowmeter 9 are opened to ensure that the rainfall simulation equipment supplies water normally, the water valve at the bottom of the underground water supply tank 4 is opened to ensure that the underground water supplies water normally, meanwhile, the slope surface rain sheltering equipment is removed, and the experiment formally starts. When the form of the slope body is changed to a certain form and the slope surface has stable seepage and remains stable for a long time, the experiment can be considered to be finished, the rainfall equipment water supply and the underground water supply are turned off, different parts of the slope are sampled for particle analysis, and experimental data are downloaded on a display through an external memory.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (7)
1. The utility model provides an experimental apparatus of landslide is induced in two-way infiltration of rainfall simulation and groundwater which characterized in that: the device comprises a bearing frame (2), wherein the bearing frame is hinged with the right end of the bottom of a model device box (1) through a hinge device (17), the left end of the bottom of the model device box (1) is connected with a hoist device (18), the hoist device (18) is connected with an integral frame (3), the top of the model device box (1) is provided with an opening, and a rainfall device is arranged above the model device box (1); an experimental slope model (15) is arranged at the left part of the model device box (1), and a groundwater infiltration device is arranged at the bottom of the experimental slope model (15); and a data monitoring system is arranged in the experiment slope model (15).
2. The experimental device for simulating rainfall and groundwater bidirectional infiltration induced landslide of claim 1, wherein: the rainfall device comprises a rainfall spray head (19) arranged above the model device box (1), a flowmeter (9) is connected through a water pipe, and a rainfall simulation water supply tank (7) is connected behind a water pump (8).
3. The experimental device for simulating rainfall and groundwater bidirectional infiltration induced landslide of claim 1, wherein: the underground water infiltration device comprises a bedrock fracture water supply device (11) on a model box bottom plate (10) of an experimental slope model (15), wherein the bedrock fracture water supply device (11) is composed of PVC pipes arranged at the bottom of the experimental slope model (15), and holes are formed in the PVC pipes.
4. The experimental facility for simulating rainfall and groundwater bidirectional infiltration induced landslide of claim 3, wherein: an underground water inlet hole (12) is formed in the model device box (1); the bedrock fracture water supply device (11) is connected with the underground water inlet hole (12), the underground water inlet hole (12) is connected with the water pipe, and the water pipe is connected with the underground water supply tank (4).
5. The experimental facility for simulating rainfall and groundwater bidirectional infiltration induced landslide of claim 4, wherein: one side of the underground water supply tank (4) is provided with water overflow outlets with different heights and equal spacing distances, the water overflow outlets are connected with water pipes, and the water pipes are connected with water valves (20).
6. The experimental device for simulating rainfall and groundwater bidirectional infiltration induced landslide of claim 1, wherein: the model device box (1) is provided with a pressure tube hole (13); the data monitoring system comprises a pressure measuring pipe (16) which is arranged in an experimental slope model (15) and connected with a pressure measuring pipe hole (13), the pressure measuring pipe (16) is connected with a sensor (14), the sensor (14) is connected with a data acquisition unit (5), and the data acquisition unit (5) is connected with a display (6).
7. The experimental facility for simulating rainfall and groundwater bidirectional infiltration induced landslide of claim 6, wherein: the sensors (14) comprise a group of sensors embedded in the experimental slope model (15) at different heights.
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| CN202122715636.2U CN216527722U (en) | 2021-11-08 | 2021-11-08 | Experimental device for rainfall simulation and groundwater bidirectional permeation induce landslide |
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| CN202122715636.2U CN216527722U (en) | 2021-11-08 | 2021-11-08 | Experimental device for rainfall simulation and groundwater bidirectional permeation induce landslide |
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