CN212321034U - Slope instability experimental device with rainfall and earthquake as inducement factors - Google Patents
Slope instability experimental device with rainfall and earthquake as inducement factors Download PDFInfo
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- CN212321034U CN212321034U CN202021714798.3U CN202021714798U CN212321034U CN 212321034 U CN212321034 U CN 212321034U CN 202021714798 U CN202021714798 U CN 202021714798U CN 212321034 U CN212321034 U CN 212321034U
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Abstract
The utility model relates to an use slope unstability experimental apparatus of rainfall and earthquake as incentive belongs to geotechnical engineering experimental apparatus field. The rainfall simulation device comprises a model box body, a slope model, a rainfall simulation device, a vibration simulation device and a monitoring system. The model box body is a transparent cuboid with an opening at the upper part and is placed on a vibration table, and a side slope model is piled in the model box body. The water outlet end of the rainfall simulation device is positioned above the model box body and sprays the rainfall to the slope model so as to simulate the rainfall effect. The vibration simulation device is connected with a power supply through a motor, and converts electric energy into mechanical energy, so that the vibration table generates vibration and further simulates earthquake disturbance. The monitoring system is connected with the reading instrument through the related tester to obtain real-time data, and the real-time data is processed by the computer terminal. The experimental device can ideally simulate and monitor the deformation instability of the slope under the rainfall infiltration effect and earthquake dynamic response coupling conditions.
Description
Technical Field
The utility model relates to an use slope unstability experimental apparatus of rainfall and earthquake as incentive belongs to geotechnical engineering experimental apparatus field.
Background
The instability of the side slope is one of the most common disasters in geological disasters in China, the stability analysis of the side slope is an important research direction of geotechnical engineering, and the influence reasons of the stability comprise rainfall, earthquake, manual excavation, various loading effects, geotechnical engineering properties and the like. Rainfall and earthquake are two factors which are most common and are still the key points of slope stability research. The analysis and research of the instability mode of the slope under the conditions of rainfall or earthquake and the coupling of the rainfall and the earthquake play a very important role in preventing and treating the instability of the slope.
In China, instability and damage of artificial slopes formed by natural rock slopes and excavation of railways, highways and the like are frequent in rainy seasons, and in recent years, most scholars generally recognize that the instability of the slopes is related to rainfall; in the earthquake field, research of the institute of earth environment of the Chinese academy of sciences found that nearly 6 million landslides were generated due to the Wenchun earthquake in 2008. The earthquake usually has a short duration, the rainfall may last for a long time, and apparently, the great difference between the earthquake and the rainfall in the duration makes the probability of the coupling between the earthquake and the rainfall extremely small, and the coupling between the earthquake and the rainfall seems to be unnecessary to consider. However, in 2008, the aftershocks generated by 8.0-level extra-large Wenchuan earthquake are much and strong, so that the duration influence time of the earthquake greatly exceeds the existing cognition, and in addition, the season of vigorous rainfall in Wenchuan is just driven; thus, prolonged periods of heavy rainfall increase the potential for landslide hazard over the effective duration of the seismic event. The soft interlayer in the slope rock-soil body is a widely existing geologic body, and has low mechanical strength, poor water physical property and obvious rheological effect; the deformation instability and the failure mode of the side slope under the rainfall and earthquake disturbance are controlled and influenced by the weak interlayer, the thickness of the weak interlayer and the inclination angle of the weak interlayer to a great extent.
Therefore, it is necessary to research the instability mechanism of the slope under the coupling condition of rainfall and earthquake, but the implementation cost of the field slope field test under the actual condition is high, and the difficulty is high.
Disclosure of Invention
The utility model discloses not enough and do not relate to the part to prior art existence, provide one kind and use rainfall and earthquake for the side slope unstability experimental apparatus who lures the reason, can consider the side slope simultaneously and infiltrate the deformation unstability under effect and the earthquake dynamic response coupling condition at the rainfall, can accomplish the side slope unstability simulation experiment under rainfall and the earthquake coupling condition indoor. The method is necessary to research the instability mechanism of the side slope under the coupling condition of rainfall and earthquake, research the triggering mechanism of the side slope instability under the coupling condition of the rainfall and the earthquake, analyze the influence of the thickness of the weak interlayer and the change of the inclination angle of the interlayer on the side slope under the working conditions of rainfall and earthquake, and provide more theoretical bases for preventing the instability of the side slope.
The utility model adopts the technical proposal that: a slope instability experimental device taking rainfall and earthquake as inducement comprises a model box body 1, a slope model 2, a rainfall simulation device, a vibration simulation device and a monitoring system;
the model box body 1 is a transparent cuboid with an opening at the upper part and is placed on a vibration table 26, a side slope model 2 is piled in the model box body 1, the water outlet end of a rainfall simulation device is positioned above the model box body 1, a vibration simulation device is positioned below the model box body 1, a monitoring system comprises a detection device arranged on the side slope model 2, a reading instrument 38 and a computer terminal 39 which are positioned outside the model box body 1, the detection device is connected with the reading instrument 38, the reading instrument 38 is connected with the computer terminal 39,
the side slope model 2 is positioned below the inner part of the model box body 1 and consists of two side slopes which are symmetrical left and right, the slope feet of the two side slopes are positioned in the middle part of the whole side slope model 2, a detection device is arranged in each side slope, and a weak interlayer 3 is arranged in the side slope on at least one side;
the vibration simulation device comprises a bottom plate 21, a lower base 22, a fixed base 23, a return spring 24, an upper base 25, a vibration table 26, a motor fixing beam 28 and a motor 29; the bottom plate 21, the lower base 22, the fixed seat 23, the upper base 25 and the vibration table 26 are fixedly connected from bottom to top, the return spring 24 is arranged between the fixed seat 23 and the upper base 25, the motor fixing beam 28 is fixed on the bottom surface of the vibration table 26, and the motor 29 is installed on the motor fixing beam 28 and is connected with the vibration table 26.
Specifically, the rainfall simulation device comprises a water tank 5, a hose 6, a connecting clamping sleeve 7, a water tank support 8, a water outlet pipe 9, a water pump 10, a water supply main pipe 11, a flow meter 12, a valve 13, an angle steel support rod 14, a water pipe support 15, a top branch pipe 16, a joint 17, a telescopic hose 18, a rainfall spray head 19 and a drain hole 20, wherein the water tank 5 is placed on the water tank support 8 and is connected with the water outlet pipe 9 through the hose 6 and the connecting clamping sleeve 7, and the water outlet pipe 9 is connected with the water pump 10; the water inlet end of a main water supply pipe 11 is connected with a water pump 10, the water outlet end is communicated with a branch top pipe 16 through a valve 13, a flowmeter 12 is installed on the main water supply pipe 11, angle steel support rods 14 are supported right above four corners of a model box body 1, a water pipe support 15 is supported between the angle steel support rods 14, the branch top pipe 16 is fixed on the water pipe support 15, the lower portion of the branch top pipe 16 is connected with a rainfall spray head 19 sequentially through a connector 17 and a telescopic hose 18 capable of rotating by an angle, and a drain hole 20 is formed in the bottom of the model box body 1.
Preferably, the water pump 10 is a self-suction water pump, the bottom of the two sides of the model box body 1 is provided with a plurality of drain holes 20, the radius of each drain hole 20 is not less than 5cm, and the distance between two adjacent holes is not less than 10 cm.
Preferably, polystyrene foam 27 is fixed above the vibration table 26, and the bottom of the model box 1 is placed above the polystyrene foam 27 on the vibration table 26 through the supporting base 4.
Specifically, the five surfaces of the model box body 1 are made of high-transparency organic glass and are detachable through buckles, the length, the width and the height of the model box body 1 are 1m, 0.8m and 1m respectively, the width of the side slope model 2 is 0.8m of the model box body 1, and the height of the model box body is controlled to be not less than 20cm away from the bottommost part of the rainfall sprayer 19 on the top surface of the slope.
Preferably, the bottom plate 21 and the lower base 22, the lower base 22 and the fixed seat 23, and the upper base 25 and the vibration table 26 are fixed by welding.
Specifically, the detection device comprises a soil pressure gauge 33, a pore water pressure tester 34, a vibration detector 35, a moisture content tester 36 and a displacement meter 37, wherein each half slope is provided with a plurality of tester lead holes 32, the soil pressure gauge 33, the pore water pressure tester 34, the vibration detector 35, the moisture content tester 36 and the displacement meter 37 are connected with a reading instrument 38 through cables 30 penetrating through the tester lead holes 32, and the vibration detector 35 can measure speed, acceleration and displacement values.
Specifically, the top branch pipe 16 comprises four mutually communicated transverse water distribution pipes, and the rainfall spray nozzle 19 is a plastic three-head watering spray nozzle.
Specifically, the two motor fixing beams 28 on the bottom surface of the vibration table 26 belong to steel plates and are fixed at two ends in the middle vertical direction through welding, the vibration table 26 is a square with the size of 1.5m multiplied by 1.5m, the amplitude is 0.3-0.6 mm, and the frequency is 10-30 Hz.
The utility model has the advantages that:
1) meanwhile, the coupling effect of the slope on stress field changes caused by rainfall and earthquake is considered, and the slope instability simulation experiment under the rainfall and earthquake coupling condition can be completed indoors.
2) In the experimental device, different weak interlayers are arranged, so that the rainfall infiltration effect and the deformation instability contrast under the earthquake dynamic response coupling condition are performed on the side slopes on two sides, and the influence of the thickness and the inclination angle of the weak interlayers and the interlayers on the side slope stability and the side slope damage mode under the rainfall and earthquake working conditions can be researched.
3) In the experimental device, the method has important practical significance for researching the deformation instability of the slope under the rainfall infiltration effect and earthquake dynamic response coupling conditions.
Drawings
FIG. 1 is a schematic view of the structure of the device of the present invention;
FIG. 2 is a schematic view of the overall structure of the device model box of the present invention;
FIG. 3 is a schematic view of the bottom structure of the vibrating table of the device of the present invention;
FIG. 4 is a schematic view of the structure of a rain pipe network above the device model box body of the present invention;
FIG. 5 is a schematic view of the connection structure of the rain sprayer of the present invention;
FIG. 6 is a schematic view of the structure of the contrast experiment monitoring system with no soft interlayer of the device of the present invention;
FIG. 7 is a schematic diagram of the thickness comparison experiment of the soft and weak interlayer with different levels of the device of the present invention;
FIG. 8 is a schematic diagram of a thickness comparison experiment of an interlayer with different soft and straight inclinations;
FIG. 9 is a schematic diagram of another comparative experiment of the device of the present invention with different tilt angles of the soft interlayer;
FIG. 10 is a schematic diagram of a thickness contrast experiment of an interlayer with different anti-inclination soft and weak according to the present invention;
fig. 11 is a schematic diagram of another comparative experiment of the device of the present invention with different inclination angles of the soft interlayer.
The reference numbers in the figures are: 1. a model box body; 2. a slope model; 3. a soft and weak interlayer; 4. a support base; 5. a water tank; 6. a hose; 7. connecting the clamping sleeve; 8. a water tank bracket; 9. a water outlet pipe; 10. a water pump; 11. a water supply main pipe; 12. a flow meter; 13. a valve; 14. angle steel support bars; 15. a water pipe bracket; 16. dividing the top into pipes; 17. a joint; 18. a flexible hose; 19. a rainfall sprayer; 20. a drain hole; 21. a base plate; 22; a lower base; 23; a fixed seat; 24. a return spring; 25. an upper base; 26. a vibration table; 27. a polystyrene foam; 28. a motor fixing beam; 29. motor 30, cable; 31. a plug; 32. a test instrument lead hole; 33. a soil pressure gauge; 34. a pore water pressure tester; 35. a vibration detector; 36. a water content tester; 37. a displacement meter; 38. a reading instrument; 39. and (6) a computer terminal.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example 1: as shown in fig. 1-11, a slope instability experimental facility using rainfall and earthquake as inducement comprises a model box 1, a slope model 2, a rainfall simulation device, a vibration simulation device and a monitoring system;
the model box body 1 is a transparent cuboid with an opening at the upper part and is placed on a vibration table 26, a side slope model 2 is piled in the model box body 1, the water outlet end of a rainfall simulation device is positioned above the model box body 1, a vibration simulation device is positioned below the model box body 1, a monitoring system comprises a detection device arranged on the side slope model 2, a reading instrument 38 and a computer terminal 39 which are positioned outside the model box body 1, the detection device is connected with the reading instrument 38, the reading instrument 38 is connected with the computer terminal 39,
the side slope model 2 is positioned below the inner part of the model box body 1 and consists of two side slopes which are symmetrical left and right, the slope feet of the two side slopes are positioned in the middle part of the whole side slope model 2, a detection device is arranged in each side slope, and a weak interlayer 3 is arranged in the side slope on at least one side;
the vibration simulation device comprises a bottom plate 21, a lower base 22, a fixed base 23, a return spring 24, an upper base 25, a vibration table 26, a motor fixing beam 28 and a motor 29; the bottom plate 21, the lower base 22, the fixed seat 23, the upper base 25 and the vibration table 26 are fixedly connected from bottom to top, the return spring 24 is arranged between the fixed seat 23 and the upper base 25, the motor fixing beam 28 is fixed on the bottom surface of the vibration table 26, and the motor 29 is installed on the motor fixing beam 28 and is connected with the vibration table 26.
Further, the rainfall simulation device comprises a water tank 5, a hose 6, a connecting clamping sleeve 7, a water tank support 8, a water outlet pipe 9, a water pump 10, a water supply main pipe 11, a flow meter 12, a valve 13, an angle steel support rod 14, a water pipe support 15, a top branch pipe 16, a joint 17, a telescopic hose 18, a rainfall spray head 19 and a drain hole 20, wherein the water tank 5 is placed on the water tank support 8 and is connected with the water outlet pipe 9 through the hose 6 and the connecting clamping sleeve 7, and the water outlet pipe 9 is connected with the water pump 10; the water inlet end of a main water supply pipe 11 is connected with a water pump 10, the water outlet end is communicated with a branch top pipe 16 through a valve 13, a flowmeter 12 is installed on the main water supply pipe 11, angle steel support rods 14 are supported right above four corners of a model box body 1, a water pipe support 15 is supported between the angle steel support rods 14, the branch top pipe 16 is fixed on the water pipe support 15, the lower portion of the branch top pipe 16 is connected with a rainfall spray head 19 sequentially through a connector 17 and a telescopic hose 18 capable of rotating by an angle, and a drain hole 20 is formed in the bottom of the model box body 1.
Further, the water pump 10 is a self-suction water pump, the bottom of the two sides of the model box body 1 is provided with a plurality of drain holes 20, the radius of each drain hole 20 is not less than 5cm, and the distance between every two adjacent holes is not less than 10 cm.
Furthermore, polystyrene foam 27 is fixed above the vibration table 26, and the bottom of the model box body 1 is placed above the polystyrene foam 27 on the vibration table 26 through the supporting base 4.
Furthermore, the five surfaces of the model box body 1 are made of high-transparency organic glass and are detachable devices through buckles, the length, the width and the height of the model box body 1 are 1m, 0.8m and 1m respectively, the width of the side slope model 2 is 0.8m of the model box body 1, and the height of the model box body is controlled to be not less than 20cm away from the bottommost part of the rainfall spray head 19 on the top surface of the slope.
Further, the bottom plate 21 and the lower base 22, the lower base 22 and the fixed seat 23, and the upper base 25 and the vibration table 26 are fixed by welding.
Further, the detection device comprises a soil pressure gauge 33, a pore water pressure tester 34, a vibration detector 35, a water content tester 36 and a displacement meter 37, wherein the adopted testers are all miniature testers; if other parameters need to be monitored in an experiment, other testers can be arranged, a plurality of tester lead holes 32 are formed in each half slope, the number of the tester lead holes is determined according to the experiment requirement, the soil pressure gauge 33, the pore water pressure tester 34, the vibration detector 35, the water content tester 36 and the displacement meter 37 are connected with the reading instrument 38 through cables 30 penetrating through the tester lead holes 32, and the vibration detector 35 can measure speed, acceleration and displacement values.
Furthermore, the top branch pipe 16 comprises four mutually communicated transverse water distribution pipes, and the rainfall spray nozzle 19 is a plastic three-head watering spray nozzle.
Furthermore, the two motor fixing beams 28 on the bottom surface of the vibration table 26 belong to steel plates and are fixed at two ends in the middle vertical direction through welding, the vibration table 26 is a square with the size of 1.5m multiplied by 1.5m, the amplitude is 0.3-0.6 mm, and the frequency is 10-30 Hz.
The utility model discloses in, slope model 2 is by artifical building method, can simulate different slope height, slope angle and slope top surface, domatic, slope foot face size to and utilize different similar simulation materials, adopt different configuration proportions to simulate different slope internal structure, can realize carrying out effective simulation to different types of side slope bodies. The regulation of the flow and the flow speed of the rainfall spray head 19 can be realized through the water pump 10 and the valve 13, and the deformation instability characteristics of the slope under various rainfall intensities are simulated; the amplitude and the frequency are controlled by adjusting the rotating speed of the motor 29, vibration with different amplitudes and different frequencies is applied to the slope, and the slope instability rule under different vibration forces is simulated; required parameters are obtained through a test instrument arranged in the slope model 2, a test instrument lead hole 32 arranged on the front surface of the model box body 1 and a reading instrument 38 connected with the cable 30, data processing is carried out at a computer terminal 39, validity of test data can be guaranteed, and dynamic changes of the slope in different stress fields can be monitored in real time. The micro pore water pressure tester 34 and the water content tester 36 are arranged in the slope model 2 to measure the pore water pressure and the water content of the interior of the slope in the rainfall infiltration process and under the condition of no rainfall, and data are recorded, so that the change condition of the seepage field of the interior of the slope can be observed. The micro vibration detector 35 is arranged in the side slope model to monitor the speed and the acceleration of different positions in the side slope under the earthquake disturbance, so that the earthquake dynamic response rule in the side slope can be observed. A miniature soil pressure gauge 33 and a displacement gauge 37 are arranged in a slope model to observe the stress field change condition and the displacement change condition inside the slope under the rainfall infiltration effect and earthquake dynamic response coupling condition.
The slope instability experimental device adopting rainfall and earthquake as inducements adopts an experimental method that: the method comprises the following steps:
step 1: preparing steel plate materials of all parts required by a vibration simulation device according to experimental requirements, wherein the size of a vibration table 26 is 1.5m multiplied by 1.5 m; the bottom plate 21, the lower base 22 and the fixed base 23 are fixedly contacted through welding, and a return spring 24 is arranged between the fixed base 23 and the upper base 25; the upper base 25 and the vibration table 26 are fixedly contacted through welding; two motor fixing beams 28 on the bottom surface of the vibration table 26 are fixed at two ends in the middle vertical direction through welding, and a motor 29 is fixed on the bottom surface of the vibration table 26 through the two motor fixing beams 28; a layer of polystyrene foam 27 having a thickness of 20cm was laid as a damping layer above the vibration table 26.
Step 2: according to the size 1m multiplied by 0.8m multiplied by 1m of the model box body 1 required by the experiment, high-transparency organic glass is prepared, a plurality of lead holes 32 of a testing instrument are reserved on the organic glass at the front, a plurality of drain holes 20 are reserved at the bottoms of the organic glass at two side surfaces, the detachable model box body 1 is formed by installation, the front is kept and is not installed, the rest four surfaces are installed well, the model box body 1 is placed above polystyrene foam 27 on a vibration table 26 by using a support base 4 at the bottom, a slope model 1 simulation material and a weak interlayer 3 simulation material for the experiment are prepared, similar materials are configured in the model box body 1 according to the experiment requirement to stack a slope model 2 and the weak interlayer 3, water mist is sprayed during stacking to achieve the designed water content and wet density, the width of the stacked slope model 2 is 0.8m of the width of the model box body 1, the slope height, the slope angle and, The sizes of the slope surface and the slope foot surface are determined according to the actual engineering summary and the similarity ratio, and the slope height is controlled to be not less than 20cm from the bottommost part of the rainfall spray head on the top surface of the slope; a plurality of soil pressure gauges 33, pore water pressure testers 34, vibration detectors 35, water content testers 36 and displacement meters 37 are respectively arranged at different positions according to experimental requirements in the stacking process and connected with cables 30;
and step 3: the embodiment comprises six pairs of comparative experiments, namely deformation instability comparison of slopes with or without weak interlayers 3, slopes with different levels of thicknesses of the weak interlayers 3, slopes with different thicknesses and inclination angles of the forward-inclined weak interlayers 3 and slopes with different thicknesses and inclination angles of the reverse-inclined weak interlayers 3 under the coupling conditions of rainfall infiltration effect and earthquake dynamic response. The thickness of the soft interlayer 3 and the inclination angle of the soft interlayer 3 are two factors, and when one of the factors is subjected to a comparative experiment, the other factor is consistent. In the slope instability contrast experiment of the weak interlayers 3 with different thicknesses, the weak interlayers 3 with different thicknesses are piled from the same horizontal plane or the same inclined plane; in the slope instability contrast experiment of the weak interlayer 3 with different dip angles, the lowest part of the soft interlayer 3 at the exposed position of the slope surface is on the same horizontal line.
And 4, step 4: after filling the model box body 1 with the slope model 2 and performing natural consolidation for one day, the model box body 1 is installed with the front surface, the cable 30 passes through the lead hole 32 of the test instrument and is connected with the reading instrument 38, and the reading instrument 38 is connected with the computer terminal 39.
And 5: the water tank 5 is placed on a water tank support 8 and is connected with a water outlet pipe 9 through a hose 6 and a connecting clamping sleeve 7, the water outlet pipe 9 is connected with a water pump 10, and the water pump 10 is a self-suction water pump; the water inlet end of the main water supply pipe 11 is connected with the water pump 10, the water outlet end is communicated with the top branch pipe 16 through a valve 13, and the main water supply pipe 11 is provided with a flowmeter 12. Before use, injecting experimental water into a water tank, and continuously supplementing water in the experimental process to ensure sufficient experimental water consumption; the water pump 10 selects the parameter type according to the intensity of the simulated rainfall as much as possible to make the simulated rainfall more uniform.
Step 6: installing angle steel support rods 14 and water pipe brackets 15 above four corners of the model box body 1, and then configuring a rainfall pipe network; the rainfall pipe network consists of top branch pipes 16, a plurality of rainfall sprayers 19 are connected and configured below the top branch pipes 16 through joints 17 and telescopic hoses 18, and the direction of the rainfall sprayers 19 is controlled by manually adjusting the telescopic hoses 18 to realize uniform spraying; the rainfall infiltrates into the slope model 2 and is directly discharged from the drain holes 20 at the bottoms of the two sides of the model box body 1.
And 7: the flow of the rainfall spray head 19 is controlled by adjusting the valve 13, and the flow meter 12 is observed to be adjusted to the flow required by the experiment; the motor 29 is connected to a power source, and the amplitude and frequency are controlled by adjusting the rotation speed of the motor 29.
And 8: and (3) setting a certain rainfall time and vibration time according to the experimental requirements, and closing the valve 13 and cutting off the power supply of the motor 29 after the time is up.
And step 9: the data recorded by the reading instrument 38 is processed at the computer terminal 39.
In fig. 6: in the contrast experiment of the side slope with or without the weak interlayer 3, under the action of simulated rainfall and earthquake, the side slope with the weak interlayer 3 on the left side presents the sliding characteristic along the weak interlayer 3 compared with the side slope without the weak interlayer 3 on the right side, and the side slope crack is communicated with the weak interlayer 3; the slope displacement is bigger, and the destruction is more obvious.
In fig. 8: in the thickness comparison experiment containing different forward-inclination weak interlayers 3, under the action of simulated rainfall and earthquake, compared with the side slope containing a thicker weak interlayer 3 on the right, the side slope containing a thinner weak interlayer 3 on the left has the advantages of obvious damage characteristic along the weak interlayer 3, lower side slope safety coefficient and poorer stability.
In fig. 9: in the dip angle comparison experiment containing different forward-inclination weak interlayers 3, under the action of simulated rainfall and earthquake, the slope with the left side containing the 45-degree dip angle weak interlayer 3 has larger glide force, larger damage range and lower integral strength of the slope compared with the slope with the right side containing the 30-degree dip angle weak interlayer 3.
Based on the experimental device, the utility model discloses the coupling effect that the stress field that the device mainly can consider rainfall, earthquake to cause changes simultaneously; the deformation instability characteristics of the slope under various rainfall intensities can be simulated by adjusting the flow and the flow speed of the rainfall spray head 19; the slope instability law under different power conditions can be simulated by applying earthquakes with different amplitudes and different frequencies to the slope; therefore, the method can be used for researching and discussing the deformation characteristic and instability mechanism of the slope under the coupling of rainfall infiltration effect and earthquake dynamic response. The experimental device can ideally simulate and monitor the deformation instability of the slope under the rainfall infiltration effect and earthquake dynamic response coupling conditions.
The present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit and scope of the present invention by those skilled in the art.
Claims (9)
1. The utility model provides an use slope unstability experimental apparatus of rainfall and earthquake as incentive which characterized in that: the rainfall simulation device comprises a model box body (1), a side slope model (2), a rainfall simulation device, a vibration simulation device and a monitoring system;
the model box body (1) is a transparent cuboid with an opening at the upper part and is placed on a vibration table (26), a side slope model (2) is piled in the model box body (1), the water outlet end of the rainfall simulation device is positioned above the model box body (1), the vibration simulation device is positioned below the model box body (1), the monitoring system comprises a detection device arranged on the side slope model (2), a reading instrument (38) and a computer terminal (39) which are positioned outside the model box body (1), the detection device is connected with the reading instrument (38), the reading instrument (38) is connected with the computer terminal (39),
the side slope model (2) is positioned below the inner part of the model box body (1) and consists of two side slopes which are symmetrical left and right, the slope feet of the two side slopes are positioned in the middle of the whole side slope model (2), a detection device is arranged in each side slope, and a weak interlayer (3) is arranged in the side slope on at least one side;
the vibration simulation device comprises a bottom plate (21), a lower base (22), a fixed seat (23), a return spring (24), an upper base (25), a vibration table (26), a motor fixing beam (28) and a motor (29); bottom plate (21), lower base (22), fixing base (23), last base (25), shaking table (26) fixed connection from bottom to top sets up reset spring (24) between fixing base (23) and last base (25), and motor fixed beam (28) are fixed in the bottom surface of shaking table (26), and motor (29) are installed on motor fixed beam (28) and are connected with shaking table (26).
2. The slope instability experimental facility with rainfall and earthquake as the inducement of the claim 1 is characterized in that: the rainfall simulation device comprises a water tank (5), a hose (6), a connecting clamping sleeve (7), a water tank support (8), a water outlet pipe (9), a water pump (10), a water supply main pipe (11), a flow meter (12), a valve (13), an angle steel supporting rod (14), a water pipe support (15), a top branch pipe (16), a connector (17), a telescopic hose (18), a rainfall spray head (19) and a drain hole (20), wherein the water tank (5) is placed on the water tank support (8) and is connected with the water outlet pipe (9) through the hose (6) and the connecting clamping sleeve (7), and the water outlet pipe (9) is connected with the water pump (10); the end of intaking that supplies water to be responsible for (11) is connected with water pump (10), the play water end passes through valve (13) and divides pipe (16) intercommunication in the top, install flow meter (12) on supplying water to be responsible for (11), angle steel bracing piece (14) support directly over four angles of model box (1), water pipe support (15) support between angle steel bracing piece (14), the branch pipe (16) in the top is fixed on water pipe support (15), the branch pipe (16) in the top below loops through joint (17) and angle of rotation's expansion hose (18) and is connected with rainfall shower nozzle (19), wash port (20) set up in model box (1) bottom.
3. The slope instability experimental facility with rainfall and earthquake as the inducement of the claim 2 is characterized in that: the water pump (10) is a self-suction water pump, a plurality of drain holes (20) are formed in the bottoms of the two sides of the model box body (1), the radius of each drain hole (20) is not less than 5cm, and the distance between every two adjacent holes is not less than 10 cm.
4. The slope instability experimental facility with rainfall and earthquake as the inducement of the claim 1 is characterized in that: polystyrene foam (27) is fixed above the vibrating table (26), and the bottom of the model box body (1) is placed above the polystyrene foam (27) on the vibrating table (26) through the supporting base (4).
5. The slope instability experimental facility with rainfall and earthquake as the inducement of the claim 1 is characterized in that: the model box body (1) five sides all adopt high transparency organic glass and be detachable device through the buckle, the length and width height of model box body (1) is 1m, 0.8m and 1m respectively, the width of side slope model (2) is 0.8m of the width of model box body (1), the height control is not less than 20cm at the distance of rain shower nozzle (19) bottommost at the slope top surface.
6. The slope instability experimental facility with rainfall and earthquake as the inducement of the claim 1 is characterized in that: the bottom plate (21) and the lower base (22), the lower base (22) and the fixed seat (23), and the upper base (25) and the vibration table (26) are fixed through welding.
7. The slope instability experimental facility with rainfall and earthquake as the inducement of the claim 1 is characterized in that: detection device include soil pressure gauge (33), pore water pressure test meter (34), vibration detection appearance (35), moisture content test meter (36), displacement meter (37), all be equipped with a plurality of test instrument pin hole (32) on every half side slope, soil pressure gauge (33), pore water pressure test meter (34), vibration detection appearance (35), moisture content test meter (36), displacement meter (37) are connected with reading instrument (38) through cable (30) that pass test instrument pin hole (32), vibration detection appearance (35) measurable speed, acceleration and displacement value.
8. The slope instability experimental facility with rainfall and earthquake as the inducement of the claim 2 is characterized in that: the top branch pipe (16) comprises four mutually communicated transverse water distribution branch pipes, and the rainfall spray head (19) is a plastic three-head watering spray head.
9. The slope instability experimental facility with rainfall and earthquake as the inducement of the claim 1 is characterized in that: the two motor fixing beams (28) on the bottom surface of the vibration table (26) belong to steel plates and are fixed at two ends of the middle vertical direction through welding, the vibration table (26) is a square with the size of 1.5m multiplied by 1.5m, the amplitude is 0.3-0.6 mm, and the frequency is 10-30 Hz.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855121A (en) * | 2020-08-17 | 2020-10-30 | 昆明理工大学 | Slope instability experimental device and method with rainfall and earthquake as inducement factors |
| CN113252874A (en) * | 2021-05-12 | 2021-08-13 | 中南大学 | Slope stability testing device and testing method thereof |
| CN114518223A (en) * | 2022-01-21 | 2022-05-20 | 广东省有色矿山地质灾害防治中心 | Model test device for measuring stability safety coefficient of rock slope |
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2020
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855121A (en) * | 2020-08-17 | 2020-10-30 | 昆明理工大学 | Slope instability experimental device and method with rainfall and earthquake as inducement factors |
| CN111855121B (en) * | 2020-08-17 | 2024-03-01 | 昆明理工大学 | Slope instability experimental device and experimental method using rainfall and earthquake as inducements |
| CN113252874A (en) * | 2021-05-12 | 2021-08-13 | 中南大学 | Slope stability testing device and testing method thereof |
| CN114518223A (en) * | 2022-01-21 | 2022-05-20 | 广东省有色矿山地质灾害防治中心 | Model test device for measuring stability safety coefficient of rock slope |
| CN114518223B (en) * | 2022-01-21 | 2022-09-16 | 广东省有色矿山地质灾害防治中心 | Model test device for measuring rock slope stability safety coefficient |
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