CN114705826A - Indoor artificial rainfall and monitoring slope stability device - Google Patents
Indoor artificial rainfall and monitoring slope stability device Download PDFInfo
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Abstract
The invention discloses an indoor artificial rainfall and slope stability monitoring device, which comprises a model filling system, a rainfall system, an underground water level system, a water collecting system, a camera system and a slope stability monitoring system, wherein the model filling system is used for filling a model of a building; the model filling system is a closed transparent square steel frame structure, and a side slope structure consisting of filling soil and bedrock is filled in the model filling system; the rainfall system is arranged at the top of the model filling system; an underground water level system and a water collecting system are arranged on two sides of the model filling system; a camera lens of the camera system is over against the slope structure for recording and shooting; the sensing device of the slope stability monitoring system is arranged inside the slope structure. The test can simulate the stability change of the side slope under different rainfall intensities under the condition of no underground water level, can also independently simulate the stability change of the side slope under the rising and falling of the underground water level, and can also simulate the stability change of the side slope under the combined action of rainfall and the rising and falling of the underground water level. Therefore, the practicability is strong, the test can be repeated, and the operability is strong.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering and rainfall simulation, and particularly relates to slope model rainfall work condition downhill body stability analysis.
Background
In regions with severe influence of monsoon in the southeast coast of China, high and steep slope instability is easily caused when rainfall is large in rainy season, so that research on the slope instability mechanism in rainfall and underground water level change is necessary. Slope instability is caused by a plurality of internal factors and external factors, and slope rainfall and underground water level change in the slope are common causes. The reason is that surface water formed by rainfall can not only wash the surface of the side slope to induce debris flow, but also seep into the slope to increase the self weight of the slope soil body, increase the gliding capacity, reduce the shearing strength of the slope soil body and reduce the anti-skidding capacity. For a rock slope, surface water formed by rainfall infiltrates into a soft interlayer of the slope along rock cracks to cause the water content of the soft interlayer and the pressure of pore water to rise, the strength of the interlayer is reduced to form a potential sliding belt in the slope, the anti-sliding force is gradually smaller than the down-sliding force along with the increase of rainfall time, a sliding body slides along the sliding belt, and the slope is unstable. For a soil slope, the slope seepage field is changed due to the rise of underground water level and the infiltration of surface water, the suction of a substrate in the slope is reduced, the pore water pressure is increased, the soil strength parameter is reduced, and a plastic through area is gradually formed in the slope, so that the slope is unstable.
Natural rainfall and underground water level change are difficult to apply in the test, so the research and development of indoor artificial rainfall technology and underground water level change technology are the key points of the test. The indoor rainfall model test can monitor the dynamic response of the slope model under rainfall conditions, analyze the stability of the slope model, further popularize the slope model to actual engineering, and then adopt appropriate retaining structures and protective measures according to test results to ensure the safety and stability of the engineering. Indoor artificial rainfall has many advantages, and the rainfall is stable, and the flow is controllable, and the rainfall type is controllable. However, the current indoor artificial rainfall scheme is single, multiple factors cannot be controlled simultaneously for the rainfall scheme, influence on the underground water line is less, monitoring on the side slope is not perfect, the structure and the device of the whole model test are not continuous and complete, most rainfall model tests can only complete part of test contents, and multiple test effects cannot be achieved by using one complete test device. Therefore, the invention provides improvement and supplement aiming at the defects, combines different conditions of rainfall, slope response and the like into a model test, and can simulate rainfall working conditions, underground water level change working conditions and working conditions in which rainfall and underground water level change occur simultaneously.
Disclosure of Invention
The invention provides a device for indoor artificial rainfall and monitoring slope stability, and aims to control rainfall intensity, rainfall types, underground water levels and the like through indoor tests and research the influence of different conditions on the soil stability of a high and steep slope. The test device is precise, has excellent performance, can simulate different rainfall conditions by changing various test conditions through the adjusting device, is more comprehensive in consideration, and has more reliable test results.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an indoor artificial rainfall and slope stability monitoring device comprises a model filling system, a rainfall system, an underground water level system, a water collecting system, a camera system and a slope stability monitoring system; the model filling system is a closed transparent square steel frame structure, and a slope structure consisting of filling soil and bedrock is filled in the model filling system; the rainfall system is arranged at the top of the model filling system, a water pump in the rainfall system pumps water in a water tank to an atomizing nozzle at the top of the model filling system, and the atomizing nozzle is over against a slope structure for rainfall simulation; an underground water level system and a water collecting system are arranged on two sides of the model filling system; a camera lens of the camera system is over against the slope structure for recording and shooting; the sensing device of the slope stability monitoring system is arranged inside the slope structure.
The model filling system is used for placing a side slope reduced scale model to be researched, and the size, soil layer distribution, size, distribution and the like of the side slope reduced scale model can be filled in a reduced scale mode according to the practical engineering requirements according to the similar theoretical theorem, so that different geological conditions are simulated; the side wall and the bottom plate of the model filling system are sealed by butyl self-adhesive waterproof adhesive tape and transparent glass paper, so that water drops are prevented from leaking out of the box.
The model filling system is a square steel frame consisting of a bottom plate (1), a side surface (2), a back surface (3) and a top surface (4), and the inner side of the square steel frame is bonded and connected by a high-strength acrylic plate (5).
Specifically, the test can design soil layers with different strength parameters and fill different types of soil to simulate different geological conditions, and can also research the influence of various different retaining structure forms, arrangement positions and specific sizes on the stability of the high and steep slopes, and the test can be repeated and has strong operability.
The rainfall system is used for adjusting the type and rainfall capacity of the artificial rainfall of the slope model, and the rainfall capacity (small rain, medium rain, heavy rain and extra heavy rain) and the rainfall type (average type, front peak type, middle peak type and rear peak type) can be stably controlled through a speed regulator, a voltage stabilizer and other devices; and secondly, adjusting the height of the spray head through a high-strength cable to simulate the influence of different rainfall heights on the runoff-infiltration relation of the slope.
The rainfall system consists of a first water tank (6), a first water pump (7), a speed regulator (8), a pressure stabilizer (9), a wooden frame beam (10), a PE water pipe (11), an atomizing spray head (12), a high-strength cable (13) for adjusting the height of the spray head and a flowmeter (14).
The first water pump (7) pumps water from the first water tank (6) and conveys the water to the atomizing nozzle (12) through the first group of PE water pipes (11), the side part of the first water pump (7) is provided with a speed regulator (8) and a pressure stabilizer (9), rainfall is realized through the atomizing nozzle (12), and the speed regulator (8) can adjust the water yield and the water outlet mode of the atomizing nozzle (12) so as to adjust the rainfall and the rainfall type; the required rainfall condition is achieved by controlling the water flow and the mode in real time, and the stability and the continuity of rainfall can be ensured by the voltage stabilizer (9), so that the regulation and control of the rainfall can be realized; the atomizing nozzle (12) is bound on the wooden frame beam (10) through a high-strength cable (13); the height of atomizer (12) can be adjusted to high strength cable (13), controls the height of rainfall promptly, changes the speed that the raindrop arrived domatic, observes the influence to domatic and inside. Therefore, the combination of the two can completely research the response of the high and steep slope under various rainfall conditions, and is comprehensive and rigorous. And a flowmeter (14) is arranged on the first group of PE water pipes (11).
Wooden frame roof beam (10) are for the rainfall model special design preparation, and wooden frame roof beam (10) are installed at the top of model filling system for water pipe and atomizing shower nozzle (12) between fixed atomizing shower nozzle (12).
The model of the speed regulator (8) is a direct current motor 20A pulse width speed regulator; the model of the voltage stabilizer (9) is JC 2405; the flowmeter (14) is an ultrasonic flowmeter with the model of BS-NU-1.15 and the measuring range of 0.035-1.6L/min.
The underground water level system is mainly used for injecting water into the slope from the slope bottom to the slope through the water injection pipe, so that the water content of a soil body below a target underground water level line is close to a saturated state to the maximum extent, and the influence of underground water in the slope on the stability of the slope is further researched.
The underground water level system consists of a second water tank (6), a second water pump (7) and a water injection pipe (19);
the second water pump (7) extracts water from the second water tank (6) and conveys the water to the water injection pipe (19), the water injection pipe (19) is buried underground in the water pipe of the side slope structure, water is injected into the bottom of the side slope structure, and proper speed is selected to enable water flow to uniformly flow to the bottom of the slope, the underground water level line of the side slope structure is simulated, so that the soil body water content layer-by-layer from the bottom of the slope to the top of the slope is in a saturated state, and the influence of the underground water in the side slope on the stability of the slope is researched.
Specifically, the position of the water injection pipe influences the inclination angle of the target underground water line, so that the length of the water injection pipe can be changed to change the water injection position, underground water lines with different inclination angles are simulated, soil bodies below the underground water lines reach a saturation state, and the influence of the lifting of the underground water lines inside the side slope on the stability of the side slope is researched.
The height of the groundwater level is monitored by a water cut meter (23) arranged at the bottom of the slope.
The water collecting system is used for collecting rainwater deposited at the toe of the slope due to the slope runoff and scouring sliding objects in time, so as to avoid that accumulated water at the toe of the slope cannot be drained due to the size limit of the test model box and is different from the real situation,
the water collecting system consists of a third water tank (6), a third water pump (7), a water pipe (20) and a water collecting tank (15); the water collecting tank (15) is arranged on one side of the bottom of the model filling system, and the third water pump (7) is used for communicating the third water tank (6) with the water collecting tank (15) through a water pipe (20).
Due to the fact that slope runoff can cause rainwater to flow downwards to the slope toe instead of permeating into the slope, the rainwater is deposited on the slope toe, the rainwater can affect a slope body test, and therefore the water collecting tank is arranged and collects the redundant rainwater.
And a water pipe is inserted into the water collecting tank for drainage, and rainwater accumulated in the water collecting tank is pumped into the water tank through the water pump so as to prevent the rainwater in the water collecting tank from overflowing and influencing the test.
The camera system is used for recording the displacement of the slope mark points and the retaining structures caused by rainfall, the sliding condition of scoured objects at different positions of the slope, the generation and development of slope cracks and the process of communicating the slide belt.
The camera system consists of a steel plate (16), a steel bar (17) and a camera mobile phone (18); the top of the steel bar (17) is arranged at the top of the model filling system, the bottom of the steel bar (17) is fixed on a steel plate (16), and the camera mobile phone (18) is arranged on the steel plate (16); the camera mobile phone (18) is just opposite to the underground water level system and the water collecting system for shooting; the camera systems are distributed in the model filling system and monitor different monitoring points.
The camera lens of the camera mobile phone is a double 1200-pixel rear lens, and the test requirements can be met.
The slope stability monitoring system monitors the water migration condition in the slope of the slope model, the deformation trend of the soil body in the slope and the soil pressure increase rule according to instruments such as a water content meter, a pore water pressure meter, a grating and a soil pressure box which are buried in the model.
The side slope stability monitoring system consists of a grating (21) embedded in a side slope, a soil pressure box (22), a water content meter (23), a pore water pressure meter (24) and a displacement monitor (25) embedded in a slope surface of a side slope structure; the grating (21) is arranged on the side slope structure, and the soil pressure box (22) is pre-buried in the side slope structure; the water content meter (23) and the pore water pressure meter (24) are embedded in the filling (27).
Under the action of rainfall, the slope can generate corresponding dynamic response, corresponding data can be collected by embedding a corresponding instrument into the slope, and concrete data and change trends such as water content, slope strain, soil pressure, displacement and the like can be obtained through data processing so as to simulate changes in the slope; three water tanks (6) are arranged outside the model filling system.
The soil pressure cell adopts a resistance strain type soil pressure gauge with the model of DYB-3; the water content meter adopts a CYY-SF type water content meter, the model of the pore water pressure meter is CYY2, and the model of the displacement monitoring meter is CYY-CJWY;
the invention has the advantages that: the rainfall system and the underground water level system are independent and do not interfere with each other. The test can independently simulate the stability change of the side slope under different rainfall intensities under the condition of no underground water level, also can independently simulate the stability change of the side slope under the rising and falling of the underground water level, and also can simulate the stability change of the side slope under the combined action of rainfall and the rising and falling of the underground water level. Therefore, the practicability is strong, the test can be repeated, and the operability is strong.
Drawings
In order to more clearly explain the contents and embodiments of the invention, the drawings will be briefly described below.
FIG. 1 is a schematic view of the whole structure of the model box of the present invention.
Fig. 2 is a layout diagram of the rainfall device of the present invention.
FIG. 3 is a diagram of the arrangement of water injection after a slope according to the present invention.
To better aid understanding, the various reference numerals are now listed as follows: 1-steel frame bottom plate, 2-steel frame side, 3-steel frame back, 4-steel frame top, 5-high strength acrylic plate, 6-water tank, 7-water pump, 8-speed regulator, 9-stabiliser, 10-wooden frame roof beam, 11-PE water pipe, 12-atomizer, 13-high strength cable for adjusting shower nozzle height, 14-flowmeter, 15-water catch bowl, 16-steel sheet, 17-reinforcing bar, 18-camera phone, 19-water injection pipe, 20-water pipe, 21-grating, 22-soil pressure cell, 23-moisture content meter, 24-pore water pressure meter, 25-displacement monitor, 26-bedrock, 27-fill soil.
Detailed Description
The following detailed system description of the embodiments of the present invention will be provided in conjunction with the accompanying drawings and specific embodiments to facilitate a better understanding of the present invention by those skilled in the art. However, the embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention relates to a model for researching the stability of a high and steep slope under the action of rainfall and underground water. The whole model can be used for analyzing the stability of the slope under the action of different reinforcement schemes, underground water level height changes, different rainfall intensities and rainfall types under certain terrain conditions, and provides guidance suggestions for actual engineering construction.
As shown in fig. 1, the structural schematic diagram of the model testing apparatus of the present invention includes a model filling system, a rainfall system, an underground water level system, a water collecting system, a camera system and a slope stability monitoring system;
the model filling system simulates a side slope and a retaining structure which need to research stability performance in actual engineering by using a reduced scale model, namely, the side slope and the retaining structure are subjected to reduced scale filling according to the requirements of the actual engineering;
the rainfall system is mainly used for simulating rainfall of different types (front peak type, middle peak type, rear peak type and uniform type), different rainfall (light rain, middle rain, heavy rain and extra heavy rain) and different rainfall heights in the side slope model.
The underground water level system is used for simulating the underground water condition in the slope and is mutually independent from the rainfall system, so that the working conditions of different rainfall intensities and rainfall types without underground water can be simulated, the working conditions of different underground water level heights without rainfall can also be simulated, and the working conditions of different underground water level heights and different rainfall intensities and rainfall types can also be simulated.
The water collecting system is used for simulating the condition of timely draining accumulated water at the slope toe in actual engineering, collecting rainwater deposited at the slope toe due to slope runoff and scouring falling objects, and meanwhile, the rainwater which does not permeate into the slope body due to the slope runoff can be recycled.
The camera system records the displacement of a slope marking point and a retaining structure object caused by rainfall, the sliding condition of scouring objects at different positions of the slope, the generation and development of slope cracks and the process of communicating a sliding belt.
The slope stability monitoring system realizes the whole-course real-time monitoring of the data change conditions of instruments such as a water content meter, a pore water pressure meter, a grating, a soil pressure box and the like in a slope model under the working conditions of different underground water level heights and different rainfall types and intensities, obtains the condition of water migration in a slope body, and researches the soil pressure increase rule and the soil deformation trend in the slope body.
As shown in fig. 1, the model filling system comprises a cast steel model box body, wherein a steel plate (1) is arranged at the bottom, a steel frame (2) is arranged on the side surface, a steel frame (3) is arranged on the back surface, and a steel frame (4) is arranged on the top surface, so that a transparent visible high-strength acrylic plate (5) is arranged on the inner side of the steel frame (3) on the back surface and the inner side of the steel frame (2) on the side surface of the box body for facilitating observation;
the rainfall system comprises a water tank (6), a water outlet pipeline of the water tank is sequentially connected with a water pump (7), a flowmeter (14), a PE water pipe (11) and an atomizing nozzle (12), the PE water pipe (11) and the atomizing nozzle (12) are fixed on a wooden frame beam (10) through binding wires, and a high-strength cable (13) is connected to the wooden frame beam (10) and can be used for adjusting the height of the atomizing nozzle; the voltage stabilizer firstly adjusts standard voltage (220V) to stable working voltage (24V), and then utilizes the working voltage to control the power of the water pump through the speed regulator.
The underground water level system comprises a water tank (6) and a water content meter (23), a water outlet pipeline of the water tank is connected with a water injection water tank (6) of a water pump (7) through a water injection pipe (19), the water content meter is buried at a preset underground water level line of a scale model slope body, and the height of the underground water level is controlled through the change of a slope bottom water content meter;
the water collecting system comprises a water collecting tank (15), and a water outlet pipe (20) in the water collecting tank is sequentially connected with a water pump (7) and a water tank (6).
The camera system comprises an upper steel plate and a lower steel plate (16), wherein four holes with a certain size are formed in the two steel plates (16), the two steel plates are fixed on four steel bars (17) through nuts according to a certain angle (the inclination angle can be adjusted as required), a camera phone (18) is arranged between the two steel plates, and a camera of the camera phone (18) is placed outside the steel plates.
The side slope stability monitoring system comprises a plurality of gratings (21), a soil pressure box (22), a water content meter (23) and a pore water pressure meter (24) which are buried in a scale model slope body in a model filling system. The displacement meter (25) buried in the surface of the reduced scale model slope body monitors the displacement change of the surface of the slope body, the grating buried in the interior of the reduced scale model slope body is used for monitoring the strain change of the interior of the slope body, the soil pressure box is used for monitoring the change of the soil pressure of the interior of the slope body, the water content meter is used for monitoring the water migration rule of the soil body of the interior of the slope body, the pore water pressure meter is used for monitoring the change of the pore water pressure of the soil body of the interior of the slope body, and the displacement monitoring meter is used for monitoring the displacement of the soil body on the surface of the slope body. The multiple gratings (21), the soil pressure box (22), the water content meter (23), the pore water pressure meter (24) and the displacement monitoring meter (25) are all connected with a data acquisition instrument for monitoring in real time and recording data.
As shown in figure 2, a PE water pipe (11) and atomizing nozzles (12) in the rainfall system are fixed on a wooden frame beam (10) through binding wires, every two nozzles are connected in series at intervals of 38cm to form a group of five groups, and then the groups are connected in parallel at intervals of 42cm, and the total number of the atomizing nozzles is 20.
Side slope stability monitoring system in grating (21), displacement monitoring meter (25) can set up in about 0.810m department apart from high strength inferior gram force board (5) of steel mould box back steel frame (3) inboard in the model system, soil pressure cell (22), moisture content meter (23), pore water pressure meter (24) can set up in about 0.755m department apart from high strength inferior gram force board (5) of steel mould box back steel frame (3) inboard in the model system.
The concrete operation steps of the model for researching the stability of the high and steep slope under the rainfall action and the underground water level change action are as follows.
And acquiring geological survey data of actual engineering site working points, determining the scale ratio of the model in the model filling system, selecting a representative soil sample on site, transporting the representative soil sample back to a laboratory, reconfiguring the soil sample according to the result obtained by the site physical property test until the property of the soil is sampled on site, and performing the physical property test of the soil.
Transparent visual high-strength acrylic plates (5) are arranged on the inner sides of a back steel frame (3) and a side steel frame (2) of a cast steel mold box body of the model filling system, waterproof adhesive tapes are used for sealing gaps so as to prevent water leakage, and black marking pens are used for marking the height and the position of each layer of soil on the high-strength acrylic plates at the periphery according to geological data of site work points and the determined scale proportion of the model so as to facilitate subsequent filling.
A water injection pipe (19) is installed on an inner high-strength acrylic plate (5) of a side steel frame (2) of a cast steel mold box body in the mold filling system, and a water pump (7) and a water tank (6) are sequentially connected to complete installation of the water injection device of the underground water level system.
And according to the obtained geological data of the site work site and the determined scale ratio of the model, the soil sample is allocated to the site physical property state of the work site, and is filled into a cast steel model box in the model filling system in a layering manner and compacted to the site compaction degree of the work site.
In the process of filling the scale model in a layered mode, optical gratings (21), a soil pressure box (22), a water content meter (23) and a pore water pressure meter (24) are embedded at different soil layer heights in a slope body according to the specific space and the number of various determined instruments, a displacement monitoring meter (25) is embedded on the surface of the slope body, the various instruments are connected with a data acquisition instrument, and the data acquisition instrument monitors and records data in real time to complete the setting of a slope stability monitoring system;
10 atomizer (12) are established ties into 5 groups according to per two and are assembled into a whole with the PE water pipe again parallelly connected mode, fix PE water pipe (11) and atomizer (12) on wooden frame roof beam (10) of manual work and connect gradually water pump (7), speed regulator (8), stabiliser (9), water tank (6), flowmeter (14) through the bundle silk, adjust atomizer (12) apart from the domatic distance of scale model among the model filling system through the length of high strength cable (13) with wooden frame roof beam (10) of having fixed PE water pipe (11) and atomizer (12) again, accomplish rainfall system's setting.
A water pipe (20), a water pump (7) and a water tank (6) are sequentially connected in a water collecting tank (15) arranged at the front part of a cast steel mold box body in the mold filling system, and the water collecting system is set.
The method comprises the steps of fixing two steel plates (16) at a certain angle through nuts on four steel bars (17) arranged at the front part of a cast steel mould box body in a mould filling system, and arranging a camera phone (18) between the two steel plates (16) to complete the setting of a camera system.
Different height of underground water level can be simulated through the regulation of water pump (7) in the underground water level system and the monitoring of moisture content meter (23), different nature rainfall intensity can be simulated through adjusting speed regulator (8) in the rainfall system to this adjusts speed regulator (8) according to certain time interval in order to simulate different rainfall types in nature, if: the rainfall system and the underground water level system are independent and do not interfere with each other, so that the working conditions of different rainfall intensities and types without underground water, the working conditions of different underground water level heights without rainfall, and the working conditions of different underground water level heights and different rainfall intensity and type combinations can be simulated.
Three implementation modes are respectively adopted according to three working conditions of rainfall working condition, underground water level change working condition and rainfall and underground water level change occurring simultaneously.
According to the rainfall working condition, the switch of the underground water level system is closed, the switch of the rainfall system is opened, different natural rainfall intensities can be simulated by adjusting a speed regulator (8) in the rainfall system, the speed regulator (8) is adjusted according to a certain time interval to simulate different rainfall types in the nature, the moisture migration condition, the soil deformation trend and the soil pressure increase rule in a slope body of a data analysis model are obtained by various instruments and data acquisition instruments in the slope stability monitoring system, and the slope stability change rule under the action of rainfall and underground water is obtained through the moisture migration condition, the pore water pressure value, the strain value, the soil pressure value, the slope displacement value and other data analysis models.
And (3) opening an underground water level system switch and closing a rainfall system switch according to the underground water level change working condition, monitoring the height of the underground water level through a water content meter, and adjusting the height of the underground water level in real time. And analyzing the water migration condition, the soil deformation trend and the soil pressure increase rule in the slope body of the model through data such as water content values, pore water pressure values, strain values, soil pressure values, slope displacement values and the like measured by various instruments and data acquisition instruments in the slope stability monitoring system to obtain the stability change rule of the slope under the action of rainfall and underground water.
And aiming at the working condition that rainfall and underground water level change occur simultaneously, firstly, opening an underground water level system switch, closing the rainfall system switch, monitoring the height of the underground water level through a water content meter, and adjusting the height of the underground water level in real time. And then closing a switch of the underground water level system, opening a switch of the rainfall system, simulating different natural rainfall intensities by adjusting a speed regulator (8) in the rainfall system, adjusting the speed regulator (8) according to a certain time interval to simulate different rainfall types in the nature, analyzing the moisture migration condition, the soil deformation trend and the soil pressure increase rule in the slope body of the model through data such as water content values, pore water pressure values, strain values, soil pressure values, slope displacement values and the like measured by various instruments and data acquisition instruments in the slope stability monitoring system, and obtaining the slope stability change rule under the action of rainfall and underground water.
The scope of the invention is not limited to the specific embodiments described above.
The present invention has been systematically described using specific engineering cases to explain the principles and embodiments of the present invention, and the foregoing detailed description is only intended to describe the methods and embodiments of the present invention. According to the specific implementation method and the test range of the invention, various combined working condition researches can be developed. Other embodiments can be derived by those skilled in the art from the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.
Claims (9)
1. The utility model provides an indoor artificial rainfall and monitoring side slope stability device which characterized in that: the system comprises a model filling system, a rainfall system, an underground water level system, a water collecting system, a camera system and a slope stability monitoring system; the model filling system is a closed transparent square steel frame structure, and a side slope structure consisting of filling soil and bedrock is filled in the model filling system; the rainfall system is arranged at the top of the model filling system, a water pump in the rainfall system pumps water in a water tank to an atomizing nozzle at the top of the model filling system, and the atomizing nozzle is over against the slope structure to perform rainfall simulation; an underground water level system and a water collecting system are arranged on two sides of the model filling system; a camera lens of the camera system is over against the slope structure for recording and shooting; the sensing device of the slope stability monitoring system is arranged inside the slope structure.
2. The indoor artificial rainfall and slope stability monitoring device according to claim 1, wherein: the model filling system is a square steel frame consisting of a bottom plate (1), a side surface (2), a back surface (3) and a top surface (4), and the inner side of the square steel frame is bonded and connected by a high-strength acrylic plate (5).
3. The indoor artificial rainfall and slope stability monitoring device according to claim 1, wherein: the rainfall system consists of a first water tank (6), a first water pump (7), a speed regulator (8), a voltage stabilizer (9), a wooden frame beam (10), a PE water pipe (11), an atomizing nozzle (12), a high-strength cable (13) for adjusting the height of the nozzle and a flowmeter (14);
a first water pump (7) pumps water from a first water tank (6) and conveys the water to an atomizing nozzle (12) through a first group of PE water pipes (11), a speed regulator (8) and a voltage stabilizer (9) are arranged on the side part of the first water pump (7), and rainfall is realized through the atomizing nozzle (12); the atomizing nozzle (12) is bound on the wooden frame beam (10) through a high-strength cable (13); and a flowmeter (14) is arranged on the first group of PE water pipes (11).
4. The indoor artificial rainfall and slope stability monitoring device according to claim 3, wherein: the wooden frame beam (10) is installed on the top of a form-fill system.
5. The indoor artificial rainfall and slope stability monitoring device according to claim 3, wherein: the underground water level system consists of a second water tank (6), a second water pump (7) and a water injection pipe (19); the second water pump (7) pumps water from the second water tank (6) and conveys the water to a water injection pipe (19), and the water injection pipe (19) is a water pipe embedded in the slope structure.
6. The indoor artificial rainfall and slope stability monitoring device according to claim 3, wherein: the height of the groundwater level is monitored by a water cut meter (23) arranged at the bottom of the slope.
7. The indoor artificial rainfall and slope stability monitoring device according to claim 1, wherein: the water collecting system consists of a third water tank (6), a third water pump (7), a water pipe (20) and a water collecting tank (15); the water collecting tank (15) is arranged on one side of the bottom of the model filling system, and the third water tank (6) is communicated with the water collecting tank (15) through a third water pump (7) by a water pipe (20).
8. The indoor artificial rainfall and slope stability monitoring device according to claim 1, wherein: the camera system consists of a steel plate (16), a steel bar (17) and a camera mobile phone (18); the top of the steel bar (17) is arranged at the top of the model filling system, the bottom of the steel bar (17) is fixed on a steel plate (16), and a camera mobile phone (18) is arranged on the steel plate (16); the camera mobile phone (18) is used for shooting the underground water level system and the water collecting system; the camera systems are distributed in the model filling system in a plurality of groups.
9. The indoor artificial rainfall and slope stability monitoring device according to claim 1, wherein: the side slope stability monitoring system consists of a grating (21) embedded in a side slope, a soil pressure box (22), a water content meter (23), a pore water pressure meter (24) and a displacement monitoring meter (25) embedded in a slope surface of a side slope structure; the grating (21) is arranged on the side slope structure, and the soil pressure box (22) is pre-buried in the side slope structure; the water content meter (23) and the pore water pressure meter (24) are embedded in the filling (27).
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| CN202111662964.9A CN114705826A (en) | 2021-12-31 | 2021-12-31 | Indoor artificial rainfall and monitoring slope stability device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114878789A (en) * | 2022-07-13 | 2022-08-09 | 成都理工大学 | Rainfall type landslide instability test device based on seepage and macroscopic damage coupling analysis |
| CN116298207A (en) * | 2023-04-03 | 2023-06-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Device and method for testing instability of slope with fissure under rainfall and groundwater level coupling |
-
2021
- 2021-12-31 CN CN202111662964.9A patent/CN114705826A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114878789A (en) * | 2022-07-13 | 2022-08-09 | 成都理工大学 | Rainfall type landslide instability test device based on seepage and macroscopic damage coupling analysis |
| CN116298207A (en) * | 2023-04-03 | 2023-06-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Device and method for testing instability of slope with fissure under rainfall and groundwater level coupling |
| CN116298207B (en) * | 2023-04-03 | 2024-06-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Device and method for testing instability of slope with fissure under rainfall and groundwater level coupling |
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