CN112213469A - Experimental device and method for simulating coupling effect of seismic waves and rainfall to induce landslide - Google Patents
Experimental device and method for simulating coupling effect of seismic waves and rainfall to induce landslide Download PDFInfo
- Publication number
- CN112213469A CN112213469A CN202011226471.6A CN202011226471A CN112213469A CN 112213469 A CN112213469 A CN 112213469A CN 202011226471 A CN202011226471 A CN 202011226471A CN 112213469 A CN112213469 A CN 112213469A
- Authority
- CN
- China
- Prior art keywords
- rainfall
- water
- test box
- hydraulic cylinder
- bottom plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention provides an experimental device and method for simulating coupling action of seismic waves and rainfall to induce landslide, and belongs to the technical field of geotechnical engineering. The device comprises a test system, a vibration simulation system and a rainfall simulation system; the test system is used for stacking slope bodies and forming a mechanical environment, the vibration simulation system is used for simulating the action of seismic waves, and the rainfall simulation system is used for providing a water source and forming a rainfall action environment. The test method of the invention comprises the following steps: the method is characterized in that soil materials specified in a test are piled in a test box to construct a slope body, a vibration simulation system is utilized to simulate the influence of seismic waves on the slope body, the slope body is placed in a rainfall simulation environment with adjustable rainfall intensity and rainfall duration, the damage mechanism of landslide induced by the coupling effect of the seismic waves and the rainfall can be researched by measuring the change of parameters such as soil pressure, water content and the like of each soil layer and monitoring the damage process of the slope body under the action of the earthquake and the rainfall, and the method provides help for the research of the slope safety and protection method.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to an experimental device and method for simulating earthquake waves and rainfall coupling effect to induce landslide.
Background
Rainfall and earthquake are both important causes of landslide. The earthquake can make the slope body take place to slide, collapse, seriously reduces the stability of side slope, and simultaneously the earthquake can make the side slope appear a large amount of fissures, and the rainwater can cause the side slope soil dead weight to increase through these fissures infiltration side slope depths during the rainfall, causes the matrix suction and shear strength to descend, finally causes the landslide, and this has all caused serious threat to rescue after the earthquake and rebuild work. Therefore, the influence of the seismic wave-rainfall coupling effect on the stability of the slope body is researched by a test means, and the method has important significance for the prevention and the treatment of the landslide.
At present, the research on the slope stability by rainfall and earthquake is mainly carried out by the field actual measurement analysis, the data such as soil moisture content, pore water pressure, soil pressure and the like of a landslide area after disaster are collected, and then a numerical simulation test is carried out by combining rainfall data and earthquake related data, the test condition is difficult to control, the data acquisition work in the area after disaster has certain danger, meanwhile, the influence of the seismic wave-rainfall coupling effect on the slope stability is researched only in a numerical simulation mode, and the result can possibly have certain access with the actual result. The existing experimental device generally adopts a slope body built in a test box, and utilizes a driving device to drive the test box to carry out horizontal reciprocating motion so as to simulate horizontal vibration during earthquake, or utilizes an eccentric wheel shaft to generate vibration below the test box so as to simulate vibration load during earthquake, and finally utilizes a rainfall simulation device to simulate rainfall influence; the simulation effect of the former is closer to the influence of transverse waves in earthquake, but neglects the influence of longitudinal waves on the stability of the side slope, and the latter can only generate ripple action through an eccentric wheel shaft and has certain in-and-out effect with the actual earthquake waves. At present, researches on analyzing the influence of seismic wave-rainfall coupling on the stability of a slope body are still few, and necessary experimental devices and methods are lacked.
Disclosure of Invention
The invention aims to provide an experimental device and method for simulating coupling action of seismic waves and rainfall to induce landslide, which are used for researching influence of the coupling action of the seismic waves and the rainfall on stability of a slope body and providing theoretical support for research of a slope safety protection technology after earthquake.
In order to achieve the above object, the test apparatus and the test method according to the present invention are realized by the following means.
According to one aspect of the invention, an experimental device for simulating coupling action of seismic waves and rainfall to induce landslide comprises a test system, a vibration simulation system and a rainfall simulation system; the test system is used for stacking slope bodies and forming a mechanical environment, the vibration simulation system is used for simulating the action of seismic waves, and the rainfall simulation system is used for providing a water source and forming a rainfall action environment.
Specifically, the test system comprises a test box, an electric signal acquisition device, a controller and a high-speed camera; the testing box is rectangular, the top of the testing box is open, and the other sides of the testing box are closed and used for placing a slope body; the test box is along two opposite flanks of the direction of long limit for observing the side, and the test box is the drainage face along a side of minor face direction, it has the outlet to open on the drainage face for the ponding of discharge detention in the test box.
The test box comprises a transparent panel, a water collecting box, a guide pipe and a filter screen, wherein two opposite side surfaces of the test box along the direction of a long edge are observation side surfaces, the transparent panel is arranged on the observation side surfaces of the test box, and coordinate grids are carved on the transparent panel and provided with sensor mounting holes for observing the migration condition of rainwater in a side slope body in the test box, the damage condition of the side slope body and mounting of a sensor; the water collecting tank is arranged on the water drainage surface and used for collecting the accumulated water drained from the test box and draining the accumulated water in the water collecting tank into an external container through the conduit; the filter screen is arranged on the drainage surface of the test box and used for preventing soil from entering the water collecting tank from the drainage surface and blocking the guide pipe.
Specifically, the electric signal acquisition device is connected with a sensor in the test system by a lead and is used for collecting electric signals sent by the sensor; the controller is electrically connected with the electric signal acquisition device, the high-speed camera, the vibration simulation system and the rainfall simulation system and is used for processing data acquired by the electric signal acquisition device and controlling the high-speed camera, the vibration simulation system and the rainfall simulation system; the high-speed camera is positioned on the observation side surface of the test box and used for recording the process of the damage of the slope body in the test box.
Specifically, the vibration simulation system comprises a bottom plate, a track, a base, a pulley and a hydraulic cylinder; the bottom plate is rectangular and is positioned below the test box and used for fixing the hydraulic cylinder; the test box comprises a bottom plate, three pairs of rails, a pair of vertical rails and a pair of horizontal rails, wherein the three pairs of rails are vertically arranged at four corners of the bottom plate and used for guiding the test box to move up and down along the vertical direction; the base is arranged at one end of the horizontal rail and used for fixing the hydraulic cylinder; the pulley has six pairs, wherein four pairs of pulleys are arranged on two side surfaces of the test box along the short side direction, and the rest two pairs of pulleys are arranged below the bottom plate and are used for reducing the friction resistance of the test box and the bottom plate during movement; the hydraulic cylinder is four in number, two of the hydraulic cylinders are installed on the bottom plate, push rods of the hydraulic cylinders are connected with the bottom of the test box and used for pushing the test box to move up and down along the vertical direction, the other two hydraulic cylinders are installed on the base, and the push rods of the hydraulic cylinders are connected with the short edge of the bottom plate and can push the bottom plate to move along the horizontal direction.
Specifically, the vibration simulation system is electrically connected with the controller, the controller can sequentially start the hydraulic cylinder on the bottom plate and the hydraulic cylinder on the base according to a certain time interval, and sequentially close the hydraulic cylinder on the bottom plate and the hydraulic cylinder on the base after the vibration time set in the controller is reached so as to simulate the influence of real seismic waves on the slope body; the hydraulic cylinder on the bottom plate or the hydraulic cylinder on the base can be independently started and closed so as to independently study the influence of longitudinal waves or transverse waves on the slope body.
Specifically, the rainfall simulation system comprises a water tank, a water pump, a water inlet pipeline, a pressurizing device, a control valve, a spraying pipeline, a spray head, a reinforcing bracket and a drain pipe; the water tank is positioned on one side of the horizontal rail and used for providing a water source required by a rainfall simulation test; the water pump is arranged below the water level of the water tank, connected with the tail end of the water inlet pipeline and used for pumping water in the water tank to the water inlet pipeline; the two ends of the water inlet pipeline are respectively connected with the water pump and the spraying pipeline and used for introducing water into the spraying pipeline; the control valve and the pressurizing device are arranged on a water inlet pipeline and are used for controlling the water pressure and the flow; the spraying pipelines are erected above the test box, and are arranged in a plurality of numbers, and each pipeline is parallel to each other and is used for sending water into the spray head; the spray heads are arranged on the spray pipelines at certain intervals and used for spraying water on a slope body in the test system so as to simulate the influence of rainfall; the reinforcing bracket is erected below the spraying pipeline and used for supporting and reinforcing the spraying pipeline; the drain pipe is positioned below the water tank and used for draining water in the water tank.
According to a second aspect of the present invention, there is provided a test method for studying landslide induced by coupling of seismic waves and rainfall, comprising the steps of:
step one, preparing a soil sample for constructing a slope according to a test purpose, then laying the soil sample in a test box in a layering manner, burying a pore water pressure sensor and a water content sensor in the soil sample while laying the soil sample, and finally compacting the soil sample;
secondly, connecting a lead of the sensor to an external electric signal acquisition and processing device, starting the electric signal acquisition and processing device and the high-speed camera, and recording the initial soil pressure, pore water pressure and water content of each soil layer;
the hydraulic cylinder on the bottom plate and the hydraulic cylinder on the base are sequentially started through the controller according to a certain time interval, the hydraulic cylinder on the bottom plate drives the test box to move up and down along a track in the vertical direction to simulate the influence of the longitudinal waves of the earthquake on the side slope, the hydraulic cylinder on the base pushes the test box and the bottom plate to move back and forth along a horizontal track to simulate the influence of the transverse waves of the earthquake on the side slope, the hydraulic cylinder on the bottom plate and the hydraulic cylinder on the base are sequentially closed after the vibration time set in the controller is reached, the test box is returned to the initial position after the vibration is finished, and whether obvious cracks or slippage of the slope body occurs or not is observed through the transparent panels on the two sides of;
step four, injecting water into the water tank, starting a rainfall simulation device through a controller after the water tank is filled with water, controlling the rainfall intensity through a control valve and a pressurizing device, collecting the changes of soil pressure, pore water pressure and water content according to a certain time, recording the depth and the path of rainwater entering a slope body according to a certain time by means of transparent panels on two sides of the test box, observing the damage condition of the slope body during rainfall, recording the time of landslide occurrence and the position of a slip plane when the slope body has landslide, and then closing the rainfall simulation device;
step five, recording the soil pressure, the pore water pressure and the water content of each damaged soil layer after the simulation of the earthquake wave action and the rainfall action is completed;
and step six, analyzing the influence of different vibration and different rainfall action conditions on the soil pressure, the pore water pressure and the water content of the slope soil body in a contrasting manner, and analyzing the influence of a simple seismic wave action, a simple rainfall action and a seismic wave-rainfall coupling action on the stability of the slope body.
The working principle of the invention is as follows:
the side slope body with the embedded sensor is placed in a test box, a hydraulic cylinder on a bottom plate and a hydraulic cylinder on a base are sequentially started through a controller according to a certain time interval, the test box is driven to move up and down along a vertical rail by the hydraulic cylinder on the bottom plate so as to simulate the influence of earthquake longitudinal waves on the side slope, the test box and the bottom plate are pushed to move back and forth along a horizontal rail by the hydraulic cylinder on the base so as to simulate the influence of earthquake transverse waves on the side slope, and the hydraulic cylinder on the bottom plate and the hydraulic cylinder on the base are sequentially closed after the vibration time set in the controller is reached. The water pump is started through the controller, water is pumped into the water inlet pipeline from the water tank through the water pump, then enters the spraying pipeline through the water inlet pipeline, the water pressure and the flow are controlled by the control valve and the pressurizing device on the water inlet pipeline, and finally, the spray head on the spraying pipeline sprays water onto the slope body in the test system so as to simulate rainfall with different intensities. The influence of the seismic wave-rainfall coupling effect on the stability of the slope body is researched by monitoring the change of the pore water pressure and the water content of the slope body, the occurrence time of slope slide of the slope body and the position of a slip surface.
Compared with the prior art, the invention has the following beneficial effects:
1. the vertical direction and the horizontal direction can be vibrated for the side slope body in the test box through the vibration simulation device so as to simulate the influence of longitudinal waves and transverse waves of an earthquake on the side slope body, and the side slope body in the test box can be sprayed through the rainfall simulation device so as to simulate the natural rainfall phenomenon, so that the process of simulating the side slope body landslide under the dual factor action of earthquake waves and rainfall is realized. The testing device and the testing method eliminate a plurality of complex interference factors of field test, so that the testing result has repeatability.
2. Vertical track and the pneumatic cylinder that sets up on the bottom plate can make the proof box along vertical direction reciprocating motion from top to bottom to the influence of simulation longitudinal wave has compensatied the not enough that experimental apparatus lacks the influence of simulation longitudinal wave in the past, makes the earthquake wave effect of simulation more be close to real earthquake wave effect in the experiment.
3. The transparent panel of the observation side through the proof box can directly observe the crack distribution situation of the side slope body, the migration process of rainwater at the side slope body, the destruction situation when the side slope body slides, coordinate grid lines are carved on the transparent panel and mounting holes for installing sensors for measurement are evenly distributed at intervals, the rainwater penetration depth and seepage flow path can be carefully observed in the soil layer under different periods of rainfall, the coordinate grid can be utilized to estimate the volume of the side slope body, and the real-time monitoring can be carried out on the soil body inside the side slope through embedding the sensors. The high-speed camera on one side of the test box can record the process of the slope body in the test box, and the damage rule of the slope body which slides under the seismic wave-rainfall coupling effect is conveniently analyzed after the test is finished.
Drawings
FIG. 1 is a schematic front view of the apparatus of the present invention;
FIG. 2 is a schematic diagram of the operation of the apparatus of the present invention;
FIG. 3 is a schematic left side view of the apparatus of the present invention;
FIG. 4 is a schematic front view of a test chamber of the apparatus of the present invention;
FIG. 5 is a schematic left side view of a test chamber of the apparatus of the present invention;
FIG. 6 is a flow chart of the steps of the assay method of the present invention;
in the figure: the device comprises a test box 1, a transparent panel 1-2, a sensor mounting hole 1-3, a water collecting tank 1-4, a guide pipe 1-5, a filter screen 1-6, an electric signal acquisition device 2, a controller 3, a high-speed camera 4, a bottom plate 5-1, a track 5-2, a base 5-3, a pulley 5-4, a hydraulic cylinder 5-5, a water tank 6-1, a water pump 6-2, a water inlet pipeline 6-3, a pressurizing device 6-4, a control valve 6-5, a spraying pipeline 6-6, a spray head 6-7, a reinforcing bracket 6-8 and a drain pipe 6-9.
Detailed Description
The following examples illustrate the invention in detail: the embodiment is implemented on the premise of the technical scheme of the invention, and a detailed implementation mode and a specific operation process are given. It should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the spirit of the invention, and these are within the scope of the invention.
The method specifically comprises the following steps:
the embodiment provides an experimental device for simulating coupling action of seismic waves and rainfall to induce landslide, which comprises a test system, a vibration simulation system and a rainfall simulation system. The testing system is used for stacking slope bodies and forming a mechanical environment, the vibration simulation system is used for simulating the action of seismic waves, and the rainfall simulation system is used for providing a water source and forming a rainfall action environment.
Specifically, the test system comprises a test box 1, an electric signal acquisition device 2, a controller 3 and a high-speed camera 4; the testing box 1 is rectangular, the top of the testing box 1 is open, and the other sides are closed and used for placing a slope body; two opposite side faces of the test box 1 in the direction of the long edge are observation side faces, one side face of the test box 1 in the direction of the short edge is a drainage face, and a drainage port is formed in the drainage face and used for draining accumulated water retained in the test box 1.
Specifically, the test box 1 comprises transparent panels 1-2, a water collecting box 1-4, a guide pipe 1-5 and a filter screen 1-6, wherein two opposite side faces of the test box 1 in the direction of a long edge are observation side faces, the transparent panels 1-2 are arranged on the observation side faces of the test box 1, coordinate grids are engraved on the transparent panels 1-2, sensor mounting holes 1-3 are formed in the coordinate grids and used for observing the migration condition of rainwater in a side slope body and the damage condition of the side slope body in the test box 1 and mounting a sensor; the water collecting tank 1-4 is arranged on the drainage surface and used for collecting accumulated water drained from the test box 1, and the accumulated water in the water collecting tank 1-4 is drained into an external container through the conduit 1-5; the filter screens 1-6 are arranged on the drainage surface of the test box 1 and are used for preventing soil from entering the water collecting tanks 1-4 from the drainage surface and blocking the guide pipes 1-5.
Specifically, the electric signal acquisition device 2 is connected with a sensor in the test system by a lead and is used for collecting electric signals sent by the sensor; the controller 3 is electrically connected with the electric signal acquisition device 2, the high-speed camera 4, the vibration simulation system and the rainfall simulation system and is used for processing data acquired by the electric signal acquisition device 2 and controlling the high-speed camera 4, the vibration simulation system and the rainfall simulation system; the high-speed camera 4 is positioned on the observation side surface of the test box 1 and used for recording the process of the damage of the slope body in the test box 1.
Specifically, the vibration simulation system comprises a bottom plate 5-1, a rail 5-2, a base 5-3, a pulley 5-4 and a hydraulic cylinder 5-5; the bottom plate 5-1 is rectangular, and the bottom plate 5-1 is positioned below the test box 1 and used for fixing the hydraulic cylinder 5-5; the rails 5-2 are three pairs, wherein two pairs of vertical rails 5-2 are vertically arranged at four corners of the bottom plate 5-1 and used for guiding the test box 1 to move up and down along the vertical direction, and the rest pair of horizontal rails 5-2 are arranged below the bottom plate 5-1 and used for guiding the test box 1 and the bottom plate 5-1 to move back and forth along the horizontal direction; the base 5-3 is arranged at one end of the horizontal rail 5-2 and used for fixing the hydraulic cylinder 5-5; the pulleys 5-4 have six pairs, wherein four pairs of pulleys 5-4 are arranged on two side surfaces of the test box 1 along the short side direction, and the remaining two pairs of pulleys 5-4 are arranged below the bottom plate 5-1 and used for reducing the friction resistance of the test box 1 and the bottom plate 5-1 during movement; the test box comprises a base 5-3, four hydraulic cylinders 5-5, two of the hydraulic cylinders 5-5 are arranged on a bottom plate 5-1, push rods of the hydraulic cylinders 5-5 are connected with the bottom of the test box 1 and used for pushing the test box 1 to move up and down along the vertical direction, the other two hydraulic cylinders 5-5 are arranged on the base 5-3, and the push rods of the hydraulic cylinders 5-5 are connected with short edges of the bottom plate 5-1 and can push the bottom plate 5-1 to move along the horizontal direction.
Specifically, the vibration simulation system is electrically connected with the controller 3, the controller 3 can start the hydraulic cylinder 5-5 on the bottom plate 5-1 and the hydraulic cylinder 5-5 on the base 5-3 in sequence according to a certain time interval, and close the hydraulic cylinder 5-5 on the bottom plate 5-1 and the hydraulic cylinder 5-5 on the base 5-3 in sequence after the vibration time set in the controller 3 is reached, so as to simulate the influence of real earthquake waves on the slope body; the hydraulic cylinder 5-5 on the bottom plate 5-1 or the hydraulic cylinder 5-5 on the base 5-3 can be independently started and closed so as to independently study the influence of longitudinal waves or transverse waves on the slope body.
Specifically, the rainfall simulation system comprises a water tank 6-1, a water pump 6-2, a water inlet pipeline 6-3, a pressurizing device 6-4, a control valve 6-5, a spraying pipeline 6-6, a spray head 6-7, a reinforcing bracket 6-8 and a water outlet 6-9; the water tank 6-1 is positioned on one side of the horizontal rail 5-2 and used for providing a water source required by a rainfall simulation test; the water pump 6-2 is arranged below the water level of the water tank 6-1, is connected with the tail end of the water inlet pipeline 6-3 and is used for pumping water in the water tank 6-1 to the water inlet pipeline 6-3; the two ends of the water inlet pipeline 6-3 are respectively connected with the water pump 6-2 and the spraying pipeline 6-6 and are used for introducing water into the spraying pipeline 6-6; the pressurizing device 6-4 and the control valve 6-5 are arranged on the water pipeline 6-3 and are used for controlling the water pressure and the flow; the spraying pipelines 6-6 are erected above the test box 1, the spraying pipelines 6-6 are multiple in number, and each pipeline is parallel to each other and used for sending water into the spray heads 6-7; the spray heads 6-7 are arranged on the spray pipelines 6-6 at certain intervals and are used for spraying water on a slope body in the test system so as to simulate the influence of rainfall; the reinforcing support 6-8 is erected below the spraying pipeline 6-6 and used for supporting the reinforcing spraying pipeline 6-6; the drain pipe 6-9 is located below the water tank 6-1, and is used for draining the water in the water tank 6-1.
According to a second aspect of the present invention, there is provided a test method for studying landslide induced by coupling of seismic waves and rainfall, comprising the steps of:
step one, preparing a soil sample for constructing a slope according to a test purpose, then laying the soil sample in a test box 1 in a layering manner, burying a pore water pressure sensor and a water content sensor in the soil sample while laying the soil sample, and finally compacting the soil sample;
secondly, connecting a lead of the sensor to an external electric signal acquisition and processing device 2, starting the electric signal acquisition and processing device 2 and a high-speed camera 4, and recording the initial soil pressure, pore water pressure and water content of each soil layer;
step three, sequentially starting a hydraulic cylinder 5-5 on the bottom plate 5-1 and a hydraulic cylinder 5-5 on the base 5-3 by the controller 3 according to a certain time interval, driving the test box 1 to move up and down along a track 5-2 in the vertical direction by the hydraulic cylinder 5-5 on the bottom plate 5-1, so as to simulate the influence of the longitudinal wave of the earthquake on the side slope, the hydraulic cylinder 5-5 on the base 5-3 pushes the test box 1 and the bottom plate 5-1 to move back and forth along the horizontal track 5-2 so as to simulate the influence of the transverse wave of the earthquake on the side slope, after the vibration time set in the controller 3 is reached, the hydraulic cylinders 5-5 on the bottom plate 5-1 and the hydraulic cylinders 5-5 on the base 5-3 are closed in sequence, after finishing the vibration, the test box 1 returns to the initial position, and whether the slope body has obvious cracks or slides is observed through the transparent panels 1-2 at the two sides of the test box 1;
step four, injecting water into the water tank 6-1, after the water tank 6-1 is filled with water, starting a rainfall simulation device through the controller 3, controlling the rainfall intensity through the pressurizing device 6-4 and the control valve 6-5, collecting the changes of soil pressure, pore water pressure and water content according to a certain time, recording the depth and the path of rainwater entering a seepage slope body according to a certain time by means of the transparent panels 1-2 at the two sides of the test box 1, observing the damage condition of the slope body during rainfall, recording the occurrence time of the landslide and the position of a rainfall slip surface when the slope body has the landslide phenomenon, and then closing the rainfall simulation device;
step five, recording the soil pressure, the pore water pressure and the water content of each damaged soil layer after the simulation of the earthquake wave action and the rainfall action is completed;
and step six, analyzing the influence of different vibration and different rainfall action conditions on the soil pressure, the pore water pressure and the water content of the slope soil body in a contrasting manner, and analyzing the influence of a simple seismic wave action, a simple rainfall action and a seismic wave-rainfall coupling action on the stability of the slope body.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (8)
1. An experimental device for simulating coupling action of seismic waves and rainfall to induce landslide comprises a test system, a vibration simulation system and a rainfall simulation system; the test system is used for stacking slope bodies and forming a mechanical environment, the vibration simulation system is used for simulating the action of seismic waves, and the rainfall simulation system is used for providing a water source and forming a rainfall action environment.
2. The experimental facility for simulating coupling action of seismic waves and rainfall to induce landslide of claim 1, wherein the test system comprises a test box, an electrical signal acquisition device, a controller and a high-speed camera; the test box is rectangular, the top of the test box is open, the other sides of the test box are closed, two opposite sides of the test box along the direction of the long edge are observation sides, one side of the test box perpendicular to the long edge is a drainage surface, and a drainage port is formed in the drainage surface.
3. The experimental apparatus for simulating seismic waves and rainfall coupling induced landslide of claim 2, wherein said test chamber comprises a transparent panel, a water collection tank, a conduit and a screen; the two opposite side surfaces of the test box along the direction of the long edge are observation side surfaces, the observation side surfaces of the test box are provided with the transparent panel, and the transparent panel is engraved with coordinate grids and is uniformly distributed with mounting holes for mounting the sensors for measurement at intervals; the water collecting tank is arranged on the water drainage surface and used for collecting the accumulated water drained from the test box and draining the accumulated water in the water collecting tank into an external container through the conduit; the filter screen is arranged on the drainage surface of the test box and used for preventing soil from entering the water collecting tank from the drainage surface and blocking the guide pipe.
4. The experimental device for simulating the earthquake waves and the rainfall coupling effect to induce the landslide as claimed in claim 2, wherein the electric signal collecting device is connected with a sensor in the experimental system through a lead and is used for collecting electric signals sent by the sensor; the controller is electrically connected with the electric signal acquisition device, the high-speed camera, the vibration simulation system and the rainfall simulation system and is used for processing data acquired by the electric signal acquisition device and controlling the high-speed camera, the vibration simulation system and the rainfall simulation system; the high-speed camera is positioned on the observation side surface of the test box and used for recording the process of the damage of the slope body in the test box.
5. An experimental apparatus for simulating seismic waves and rainfall coupling induced landslide according to claim 1, wherein the vibration simulation system comprises a base plate, a rail, a base, a pulley and a hydraulic cylinder; the bottom plate is rectangular and is positioned below the test box; the tracks are three pairs, wherein two pairs of vertical tracks are vertically arranged at four corners of the bottom plate, and the rest pair of horizontal tracks are arranged below the bottom plate; the base is arranged at one end of the horizontal rail; the pulley is provided with six pairs, wherein four pairs of pulleys are arranged on two side surfaces of the test box along the short side direction, and the rest two pairs of pulleys are arranged below the bottom plate; the hydraulic cylinder is four in number, two of the hydraulic cylinders are installed on the bottom plate, a push rod of each hydraulic cylinder is connected with the bottom of the test box and can push the test box to move in the vertical direction, the other two hydraulic cylinders are installed on the base, and the hydraulic rod is connected with the short edge of the bottom plate and can push the bottom plate to move in the horizontal direction.
6. The experimental device for simulating the coupling effect of seismic waves and rainfall to induce landslide of claim 1, wherein the vibration simulation system is electrically connected with the controller, the controller can start the hydraulic cylinder on the bottom plate and the hydraulic cylinder on the base in sequence according to a certain time interval, and close the hydraulic cylinder on the bottom plate and the hydraulic cylinder on the base in sequence after the set vibration time in the controller is reached, so as to simulate the influence of real seismic waves on a slope body; the hydraulic cylinder on the bottom plate or the hydraulic cylinder on the base can be independently started and closed so as to independently study the influence of longitudinal waves or transverse waves on the slope body.
7. The experimental apparatus for simulating landslide induced by coupling effect of seismic waves and rainfall according to claim 1, wherein the rainfall simulation system comprises a water tank, a water pump, a water inlet pipeline, a pressurizing device, a control valve, a spraying pipeline, a nozzle, a reinforcing bracket and a drain pipe; the water tank is positioned on one side of the horizontal rail, and an opening is formed above the water tank and can be used for placing the water pump and injecting water; the water pump is arranged below the water level of the water tank and is connected with the tail end of the water inlet pipeline; the water inlet pipeline is used for connecting the water pump and the spraying pipeline and is provided with the pressurizing device and the control valve; the pressurizing device and the control valve are used for controlling the water pressure and the flow; the spraying pipelines are erected above the test box and are arranged in a plurality of numbers, and each pipeline is parallel to each other; the spray heads are arranged on the spray pipeline at certain intervals; the reinforcing bracket is used for supporting and reinforcing the spraying pipeline; the drain pipe is used for draining water in the water tank.
8. A test method corresponding to an experimental device for simulating coupling action of seismic waves and rainfall to induce landslide is characterized by comprising the following steps:
step one, preparing a soil sample for constructing a slope according to a test purpose, then laying the soil sample in a test box in a layering manner, burying a soil pressure sensor, a pore water pressure sensor and a water content sensor in the soil sample while laying the soil sample, and finally compacting the soil sample;
secondly, connecting a lead of the sensor to an external electric signal acquisition and processing device, starting the electric signal acquisition and processing device and the high-speed camera, and recording the initial soil pressure, pore water pressure and water content of each soil layer;
sequentially starting a hydraulic cylinder on the bottom plate and a hydraulic cylinder on the base through a controller according to a certain time interval, driving the test box to move up and down along a track in the vertical direction by the hydraulic cylinder on the bottom plate so as to simulate the influence of the longitudinal wave of the earthquake on the side slope, and pushing the test box and the bottom plate to move back and forth along a horizontal track by the hydraulic cylinder on the base so as to simulate the influence of the transverse wave of the earthquake on the side slope; after the vibration time set in the controller is reached, the hydraulic cylinder on the bottom plate and the hydraulic cylinder on the base are closed in sequence, the test box returns to the initial position after the vibration is finished, and whether obvious cracks or slippage of a slope body occur or not is observed through transparent panels on the two sides of the test box;
step four, injecting water into the water tank, starting a rainfall simulation device through a controller after the water tank is filled with water, controlling the rainfall intensity through a control valve and a pressurizing device, collecting the changes of soil pressure, pore water pressure and water content according to a certain time, recording the depth and the path of rainwater entering a slope body according to a certain time by means of transparent panels on two sides of the test box, observing the damage condition of the slope body during rainfall, recording the time of landslide occurrence and the position of a slip plane when the slope body has landslide, and then closing the rainfall simulation device;
step five, recording the soil pressure, the pore water pressure and the water content of each damaged soil layer after the simulation of the earthquake wave action and the rainfall action is completed;
and step six, analyzing the influence of different vibration and different rainfall action conditions on the soil pressure, the pore water pressure and the water content of the slope soil body in a contrasting manner, and analyzing the influence of a simple seismic wave action, a simple rainfall action and a seismic wave-rainfall coupling action on the stability of the slope body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226471.6A CN112213469A (en) | 2020-11-04 | 2020-11-04 | Experimental device and method for simulating coupling effect of seismic waves and rainfall to induce landslide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011226471.6A CN112213469A (en) | 2020-11-04 | 2020-11-04 | Experimental device and method for simulating coupling effect of seismic waves and rainfall to induce landslide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112213469A true CN112213469A (en) | 2021-01-12 |
Family
ID=74058392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011226471.6A Pending CN112213469A (en) | 2020-11-04 | 2020-11-04 | Experimental device and method for simulating coupling effect of seismic waves and rainfall to induce landslide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112213469A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684147A (en) * | 2020-12-28 | 2021-04-20 | 武汉科技大学 | Rock slope excavation model test device and method under multi-field coupling effect |
| CN113063925A (en) * | 2021-03-30 | 2021-07-02 | 南华大学 | Multi-factor coupling test system for researching instability and damage mechanism of foundation pit and side slope |
| CN113092046A (en) * | 2021-04-06 | 2021-07-09 | 西南交通大学 | Stability research system of high and steep slope under earthquake and rainfall action |
| CN113252874A (en) * | 2021-05-12 | 2021-08-13 | 中南大学 | Slope stability testing device and testing method thereof |
| CN113533696A (en) * | 2021-08-03 | 2021-10-22 | 辽宁工程技术大学 | Model test device for simulating instability and damage of rock-soil slope |
| CN113758951A (en) * | 2021-08-25 | 2021-12-07 | 三峡大学 | Experimental device and method for simulating damage effect of earthquake effect on reservoir bank slope rock mass |
| CN114295806A (en) * | 2021-12-29 | 2022-04-08 | 中国长江三峡集团有限公司 | Multi-field coupled loess-mudstone landslide hazard simulation test device and method |
| CN114323558A (en) * | 2021-12-29 | 2022-04-12 | 中山大学 | Integrated test simulation device and simulation method for water disasters in river estuary zone |
| CN114720353A (en) * | 2022-06-08 | 2022-07-08 | 中国有色金属工业昆明勘察设计研究院有限公司 | Tailing pond permeation damage simulation device and experiment method |
| CN114740177A (en) * | 2022-03-24 | 2022-07-12 | 胡利航 | Slope instability risk factor simulation test device |
| CN115184582A (en) * | 2022-06-30 | 2022-10-14 | 长江大学 | Rock-soil landslide physical simulation device under erosion-wind erosion coupling erosion effect |
| CN115629181A (en) * | 2022-10-09 | 2023-01-20 | 长江大学 | Loess landslide simulation device under combined action of multiple inducing factors |
| CN116068148A (en) * | 2023-03-21 | 2023-05-05 | 中国地质调查局成都地质调查中心（西南地质科技创新中心） | Landslide accumulation body forming debris flow movement process simulation device under rainfall condition |
| CN116840450A (en) * | 2023-08-31 | 2023-10-03 | 中国矿业大学(北京) | Rainfall simulation test device and method based on geologic structure deformation process reproduction |
| CN117554597A (en) * | 2024-01-10 | 2024-02-13 | 中国地质科学院地质力学研究所 | High-level landslide contrast test device and method for complex terrain dynamics simulation |
-
2020
- 2020-11-04 CN CN202011226471.6A patent/CN112213469A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684147B (en) * | 2020-12-28 | 2024-05-14 | 武汉科技大学 | Rock slope excavation model test device and method under multi-field coupling effect |
| CN112684147A (en) * | 2020-12-28 | 2021-04-20 | 武汉科技大学 | Rock slope excavation model test device and method under multi-field coupling effect |
| CN113063925A (en) * | 2021-03-30 | 2021-07-02 | 南华大学 | Multi-factor coupling test system for researching instability and damage mechanism of foundation pit and side slope |
| CN113092046A (en) * | 2021-04-06 | 2021-07-09 | 西南交通大学 | Stability research system of high and steep slope under earthquake and rainfall action |
| CN113252874A (en) * | 2021-05-12 | 2021-08-13 | 中南大学 | Slope stability testing device and testing method thereof |
| CN113533696B (en) * | 2021-08-03 | 2023-08-18 | 辽宁工程技术大学 | Model test device for simulating rock-soil slope instability and damage |
| CN113533696A (en) * | 2021-08-03 | 2021-10-22 | 辽宁工程技术大学 | Model test device for simulating instability and damage of rock-soil slope |
| CN113758951A (en) * | 2021-08-25 | 2021-12-07 | 三峡大学 | Experimental device and method for simulating damage effect of earthquake effect on reservoir bank slope rock mass |
| CN114323558B (en) * | 2021-12-29 | 2023-11-03 | 中山大学 | River estuary water disaster integrated test simulation device and simulation method thereof |
| CN114323558A (en) * | 2021-12-29 | 2022-04-12 | 中山大学 | Integrated test simulation device and simulation method for water disasters in river estuary zone |
| CN114295806A (en) * | 2021-12-29 | 2022-04-08 | 中国长江三峡集团有限公司 | Multi-field coupled loess-mudstone landslide hazard simulation test device and method |
| CN114295806B (en) * | 2021-12-29 | 2024-04-16 | 中国长江三峡集团有限公司 | Multi-field coupling loess-mudstone landslide disaster simulation test device and method |
| CN114740177B (en) * | 2022-03-24 | 2024-02-23 | 胡利航 | Slope instability risk factor simulation test device |
| CN114740177A (en) * | 2022-03-24 | 2022-07-12 | 胡利航 | Slope instability risk factor simulation test device |
| CN114720353A (en) * | 2022-06-08 | 2022-07-08 | 中国有色金属工业昆明勘察设计研究院有限公司 | Tailing pond permeation damage simulation device and experiment method |
| CN115184582A (en) * | 2022-06-30 | 2022-10-14 | 长江大学 | Rock-soil landslide physical simulation device under erosion-wind erosion coupling erosion effect |
| CN115629181B (en) * | 2022-10-09 | 2024-02-27 | 长江大学 | Loess landslide analogue means under many evoked factors combined action |
| CN115629181A (en) * | 2022-10-09 | 2023-01-20 | 长江大学 | Loess landslide simulation device under combined action of multiple inducing factors |
| CN116068148A (en) * | 2023-03-21 | 2023-05-05 | 中国地质调查局成都地质调查中心（西南地质科技创新中心） | Landslide accumulation body forming debris flow movement process simulation device under rainfall condition |
| CN116840450A (en) * | 2023-08-31 | 2023-10-03 | 中国矿业大学(北京) | Rainfall simulation test device and method based on geologic structure deformation process reproduction |
| CN116840450B (en) * | 2023-08-31 | 2023-11-21 | 中国矿业大学(北京) | Rainfall simulation test device and method based on geologic structure deformation process reproduction |
| CN117554597A (en) * | 2024-01-10 | 2024-02-13 | 中国地质科学院地质力学研究所 | High-level landslide contrast test device and method for complex terrain dynamics simulation |
| CN117554597B (en) * | 2024-01-10 | 2024-04-02 | 中国地质科学院地质力学研究所 | High-level landslide contrast test device and method for complex terrain dynamics simulation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112213469A (en) | Experimental device and method for simulating coupling effect of seismic waves and rainfall to induce landslide | |
| CN107179396B (en) | Multifunctional assembled geotechnical engineering physical similarity test system | |
| CN106406141B (en) | Model test system and method for submarine seismic wave method detection | |
| CN108645722B (en) | Large-size multifunctional interface dynamic shear tester and test method | |
| CN111855121B (en) | Slope instability experimental device and experimental method using rainfall and earthquake as inducements | |
| CN102707034A (en) | Indoor model testing device and testing method employing air-pressure splitting vacuum preloading method | |
| CN104535413B (en) | A kind of seepage field temperature field simulation coupling material bin and TBM cutting test platforms | |
| CN107831009A (en) | Coal mine roadway side portion's anchor pole or anchorage cable anchoring analogue experiment installation and its experimental method | |
| CN112611850B (en) | Surface karst fissure area soil surface loss and underground leakage simulation device | |
| CN103513280A (en) | Microseismic monitoring analog system | |
| CN107727342A (en) | Wave load loading device and test method based on model groove | |
| CN111622277B (en) | Test device and test method for simulating influence of pile end cavities on bearing performance of pile foundation | |
| CN215297368U (en) | Experimental device for simulating coupling effect of seismic waves and rainfall to induce landslide | |
| CN212321034U (en) | Slope instability experimental device with rainfall and earthquake as inducement factors | |
| CN209945885U (en) | Gas injection-vacuum consolidation test device for sludge with high water content | |
| CN102828531A (en) | System and construction method for realizing digging and measuring of diaphragm wall trench in geotechnical centrifugal model test | |
| CN207379694U (en) | Wave load loading device based on model slot | |
| CN106093351B (en) | The test method and its device of soil deformation characteristic under a kind of simulation DYNAMIC LOADING OF DRIVING TRAIN ON BRIDGES | |
| CN110288899B (en) | Device and method for simulating disaster-causing mechanism of three-dimensional animal cave of homogeneous dam | |
| CN108387710A (en) | A kind of experimental rig and method for simulating the rectangle head boundary effect soil body | |
| CN108871950B (en) | Model test device for simulating tree root toppling, pulling and destroying under strong wind and rainstorm effect | |
| CN216051308U (en) | Multi-dimension-multi-physical-field fractured loess subsurface corrosion mechanism physical model experiment device | |
| NL2030675B1 (en) | Triaxial multi-crack hydraulic fracturing experimental device | |
| CN113109547B (en) | Testing device and testing method for accelerating slope model saturation | |
| CN104931660B (en) | The device of a kind of kinetic measurement intake profile and method of work and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |