CN110657944B - Submarine landslide evolution process simulation system and experimental method based on transparent soil rotary water tank - Google Patents
Submarine landslide evolution process simulation system and experimental method based on transparent soil rotary water tank Download PDFInfo
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Abstract
A submarine landslide evolution process simulation system and an experimental method based on a transparent soil rotary water tank belong to the technical field of marine geological disasters and geotechnical engineering experiments, and comprise a rotary water tank system, a transparent soil simulation system and a control and data acquisition system. The rotary water tank system gives different speeds to the sample by controlling the motor, and the closed circular ring structure of the U-section rotary drum tank is used for meeting the requirement that the sliding distance is not limited; the transparent soil simulation system prepares a transparent sample with a tracer stain and a fluid environment similar to the physical and mechanical properties of a real subsoil layer, and realizes three-dimensional whole-course visualization of the inside, the outside and a water-soil interface in the sample evolution process; the control and data acquisition system realizes quantitative monitoring and data extraction in the evolution process through a three-dimensional laser slicing and digital image acquisition method. The experimental system provided by the invention has the advantages of controllable scale, visible evolution process and measurable image data, and can solve the problems that long-distance evolution experiments are difficult to develop, data acquisition is difficult, monitoring pictures are unclear and the like.
Description
Technical Field
The invention belongs to the technical field of marine geological disasters and geotechnical engineering experiments, relates to physical experimental simulation of marine geological disaster evolution processes such as submarine landslide and the like, and provides a submarine landslide evolution process simulation system and method based on a transparent soil rotary water tank, aiming at the problems that long-distance evolution experiments of landslide bodies (especially viscous soil landslide bodies) are difficult to develop, experimental data acquisition is difficult, experimental process monitoring pictures are unclear and the like.
Background
The submarine landslide is the most common marine geological disaster, is widely distributed in offshore delta, continental shelf, continental slope and deep sea basin, is particularly characterized in that the seabed soil body slides locally or in a large range, and is also one of the most important geological processes for the migration of submarine sediments. Once the submarine slope is unstable, the seabed collapse, foundation failure, large deformation sliding and high-speed impact are generated, the deep open sea, offshore engineering and the like are greatly damaged, the development of ocean resources and the development of ocean economy are affected, and some large-scale submarine landslide can induce catastrophic tsunami to cause huge casualties and property loss.
Unlike land landslide, submarine landslide occurs under water, is extremely difficult to observe, and up to now lacks real and reliable observation data. After investigation, even under the condition of extremely small gradient, the submarine landslide can occur, and the device has the outstanding characteristics of high sliding speed, long migration time, wide influence range and the like. Therefore, the method has important significance in understanding the destabilization mechanism and evolution process of the submarine landslide, selecting sites in the early stage of engineering construction, evaluating the disasters of the established engineering and the like. Currently, many scholars have specifically classified and staged the subsea landslide. However, due to the restrictions of lack of real observation data, difficulty in reproducing the submarine landslide evolution process by experimental technical means, lack of theoretical basis in numerical simulation and the like, the mechanism analysis of the whole submarine landslide evolution process still remains a scientific problem of international fronts, hot spots and difficulties in a period.
In the above, it is difficult to collect the on-site data and in-situ data during the occurrence of the submarine landslide. In addition, theoretical analysis lacks support for measured data. Therefore, the indoor test is the most effective means for researching the submarine landslide evolution process. However, the scale of the indoor test is very limited, the conventional flume test can only study a very short segment (only a few to tens of seconds) of a specific stage of the submarine landslide, the whole process of the submarine landslide evolution is difficult to reproduce, even if the small-size rotating flume test exists, the small-size rotating flume test is only aimed at a homogeneous debris flow (debris flow) stage of the sandy submarine landslide, and the internal change of the landslide evolution cannot be monitored, so that the inherent mechanism of the landslide cannot be explored. More importantly, the submarine landslide, especially the deep sea landslide, mainly uses fine particle cohesive soil, once a water tank test is carried out, two media of water and soil are subjected to intense exchange immediately, turbidity is caused instantly, images and data inside and outside an evolution process cannot be acquired, and a real quantification result cannot be given out. At present, based on a similar principle, a transparent soil sample similar to the physical and mechanical properties of real clay and fluid is prepared, and the deformation process inside a solid sample is explored, which has a great deal of research foundation, but the inherent mechanism of landslide evolution cannot be explored. Therefore, based on the transparent soil technology, the development of a controllable, visual and measurable experimental system and method is an effective premise and technical guarantee for researching the submarine landslide evolution process.
Disclosure of Invention
In order to solve the defects and even blank of the current experimental device for the submarine landslide evolution process, the invention provides an experimental system capable of effectively controlling, observing and testing the whole submarine landslide evolution process, and has the function of researching the whole submarine landslide evolution process of different types, and elaborating the composition and the using method of each part of the experimental system so as to meet the requirement of the simulation analysis of the whole submarine landslide evolution process.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
A submarine landslide evolution process simulation system based on a transparent soil rotary water tank comprises a rotary water tank system, a transparent soil simulation system and a control and data acquisition system. The rotary water tank system enables the rotary drum tank 3 to rotate by controlling the high-performance servo motor 2, the purpose of endowing samples with different speeds is achieved through relative movement, and the closed U-shaped tank of the rotary water tank can meet the requirement that the sliding distance of the samples is not limited, so that the controllability is realized. The transparent soil simulation system prepares a visual sample and fluid environment similar to the physical and mechanical characteristics of a real seabed soil layer through accumulated sample preparation experience and technology and the existing similar theory, so that the whole process visualization of the inside, the outside and the interface of the sample evolution process is realized, and the visualization is realized. The control and data acquisition system can achieve three-dimensional quantitative data extraction in the whole evolution process through a three-dimensional laser slicing technology, an industrial camera and a motion camera acquisition method, and can achieve measurement. The three systems work cooperatively to jointly realize the development of the submarine landslide evolution process simulation experiment.
The rotary water tank system comprises a rotary water tank supporting frame 1, a high-performance servo motor 2, a rotary drum tank 3 and an outer inner wall surface 4 of the drum tank. The bottom of the rotary water tank supporting frame 1 is fixedly connected with the ground, is a framework of the whole experimental system, and plays a role in supporting and stabilizing the whole experimental device and providing required reaction force. The high-performance servo motor 2 is arranged at the center of the rotary water tank supporting frame 1, is connected with the rotary drum tank 3 through a plurality of rigid rods, is connected with the microcomputer 10 through a data connecting wire 11, realizes remote control of the computer, is safe and reliable, and provides different stable or variable rotation angular velocities for the rotary drum tank 3. The inner layer opening and the outer layer of the rotary drum groove 3 are closed, the cross section of the drum groove is designed as an opening U-shaped groove, the inside of the drum groove is used for placing environmental fluid 6 and transparent soil samples 7, the main body of the rotary drum groove 3 is made of organic glass, grid positioning lines are drawn according to actual needs, and the safety is ensured by being matched with a steel skeleton for supporting. The outer layer inner wall surface 4 of the drum groove is a transparent inner wall surface of the outer layer of the rotary drum groove 3, and paving materials can be updated according to experimental requirements and are used for simulating seabed surfaces with different roughness.
The transparent soil simulation system comprises a tracing dye 5, an environmental fluid 6 and a transparent soil sample 7. The tracer stain 5 is used for staining the environmental fluid 6 and the transparent soil sample 7, and is used for accurately distinguishing and capturing the evolution process of the environmental fluid-transparent soil sample interface and the change condition of the inside of the transparent soil sample. The environmental fluid 6 is a substance which is configured based on a similarity rule and is used for simulating sea water according to a transparent soil sample preparation technology, the transparent soil sample 7 is configured and solidified based on the similarity rule and is used for simulating different types of (similar in physical and mechanical properties) submarine soil layers through the transparent soil sample preparation technology, and different shapes are cut according to marine geological investigation conditions to develop a test. The environmental fluid 6 and the transparent soil sample 7 are respectively prepared into different colors with obvious difference through the tracer dye 5, so that the identification of the camera 9 is facilitated, and the method is used for accurately monitoring the internal evolution condition (including shape change, block decomposition and solid-liquid state conversion) and the external change condition (including sample speed, acceleration and stress change) of the transparent soil sample 7 in the rotating process of the rotary drum groove 3, and the material exchange process of the transparent soil sample 7 and the environmental fluid 6 includes invasion, separation, cracking and the like.
The control and data acquisition system comprises three groups of laser transmitters 8, three groups of cameras 9, a microcomputer 10 and a data transmission line 11. The laser transmitter 8 is connected with the microcomputer 10 through a data transmission line 11, is arranged in three directions in the space of the transparent soil sample 7 and is used for transmitting laser, and meets the technical requirements of laser speckle required by the transparent soil technology. The three groups of cameras 9 are arranged in three directions in the space of the transparent soil sample 7, the arrangement direction of the cameras 9 is opposite to the arrangement direction of the laser transmitters 8, the three groups of cameras 9 are connected with the microcomputer 10 through the data transmission line 11 and are used for recording and capturing the three-dimensional evolution process of the transparent soil sample 7, the whole evolution process is quantitatively analyzed through a digital image processing technology, the speed and acceleration evolution process of the sample and fluid is determined, and the stress state of the sample is estimated according to the speed and acceleration evolution process, wherein each group of cameras 9 comprises an industrial camera and a motion camera; the industrial camera is responsible for precisely identifying the speed field evolution condition of each section particle of the transparent soil sample 7 and the environmental fluid 6 based on the PIV technology by combining the laser of the laser transmitter 8; the motion camera is responsible for shooting pictures of each moment of the landslide body in the whole experimental process, recording the overall evolution condition of the landslide body, and calculating the information such as the speed, the acceleration and the stress of the landslide body. The microcomputer 10 is used for controlling the high-performance servo motor 2, the laser transmitter 8 and the camera 9 to work and rapidly convert various modes, and collecting data and images of the servo motor 2 and the camera 9; the data transmission line 11 is used for connecting the parts of the device.
A submarine landslide evolution process simulation experiment method based on a transparent soil rotary water tank is realized based on the simulation system and comprises the following steps:
In the first step, the tracer dye 5 is selected according to the requirements of the experimental overall design. Then, based on the similarity criteria, according to the transparent soil sampling technique, an environmental fluid 6 for simulating sea water is configured. Further, a transparent soil slurry having a tracer stain 5 was prepared, and a transparent soil sample 7 having a seafloor soil layer with similar physical and mechanical properties was consolidated. And finally, cutting out a specific shape meeting the overall experimental design requirement to be tested and developed.
And secondly, constructing a rotary water tank supporting frame 1, a high-performance servo motor 2 and a rotary drum tank 3, checking the stability and safety of the three parts, and carefully debugging devices of the parts to ensure the reliability and accuracy. Then, according to the experimental design requirements (sea bed roughness), the transparent paving material of the outer layer inner wall surface 4 of the drum groove is selected and replaced.
And thirdly, placing a transparent soil sample 7 in the rotary drum groove 3, injecting environmental fluid 6, placing three-direction laser transmitters 8, three-direction cameras 9 and a microcomputer 10, connecting the three-direction laser transmitters with the microcomputer 10 through a data transmission line 11, debugging and setting the mode of each experimental part, checking the power supply, connection, signals and the like of each part, and finishing all preparation works of the experiment.
Fourth, the whole experiment is started by the microcomputer 10, and the experiment is performed in a predetermined mode (constant speed, variable speed). During the rotation of the rotary water tank 3, the inner wall surface 4 of the outer layer of the tank, the environmental fluid 6 and the transparent soil sample 7 move relatively. Then, under different movement modes, the solid transparent soil sample 7 is softened, separated from the block, etc. under the action of invasion, obstruction, exchange, etc. of the environmental fluid 6, and is continuously evolved into a fluid state.
And fifthly, after the experiment is completed, the power is cut off, an experimental device and a field are cleaned, data are extracted, and data analysis and theoretical analysis are carried out.
The working principle (innovation point) of the invention is as follows: firstly, preparing two substances with different colors and large discrimination based on a tracer dye 5, wherein the two substances are a solid transparent soil sample 7 and a liquid environmental fluid 6; then, based on the design of an infinitely long chute of the rotary water tank 3, the purpose that the distance is not limited in the motion evolution process of the transparent soil sample 7 is realized; further, the three-dimensional evolution process of the environmental fluid 6 and the transparent soil sample 7 is accurately identified by the three-direction laser transmitters 8 and the three-direction cameras 9, which comprises the following steps: the interface exchange process of the environmental fluid 6 and the transparent soil sample 7 and the process of separating, cracking and developing the transparent soil internal sample 7 into fluidized fluid can be accurately distinguished in the long-distance migration evolution process through the tracer stain 5; furthermore, based on the collected data, the quantitative relation of the speed, the acceleration and the stress of the environmental fluid 6 and the transparent soil sample 7 in the evolution process is accurately calculated, and a qualitative mechanism and a quantitative model are given; finally, by preparing the transparent soil sample 7 and the environmental fluid 6 with different physical and mechanical properties, changing the shape and size of the transparent soil sample 7, changing the height of the environmental fluid 6, changing the roughness of the inner wall surface 4 of the outer layer of the groove, and realizing the accurate simulation of the evolution process of different types of submarine landslide.
The invention has the following effects and benefits: the experimental system has the advantages of controllable scale, good economy, simple and convenient connection and easy operation, relates to rich, advanced and reliable technology, can effectively realize experimental simulation of the whole long-distance evolution process of the submarine landslide, monitors the internal change of the sample evolution process and the evolution effect of a fluid-soil body interface in real time, realizes quantitative three-dimensional multi-angle data acquisition and transmission, and provides hardware research support for the complex submarine landslide evolution subject.
Drawings
FIG. 1 is an overall schematic of an experimental system;
FIG. 2 is a cross-sectional view of a rotating sink;
FIG. 3 is a top view of the experimental system;
In the figure: 1 rotating a water tank supporting frame; 2, a high-performance servo motor; 3, rotating a drum groove; 4, the inner wall surface of the outer layer of the drum groove; 5 tracing a coloring agent; 6 environmental fluid; 7, transparent soil samples; 8, a laser emitter; 9 cameras; 10 microcomputer; 11 data transmission lines.
Detailed Description
Specific embodiments of the present invention will be described in detail below with reference to the following technical schemes (and accompanying drawings).
A submarine landslide evolution process simulation system based on a transparent soil rotary water tank comprises a rotary water tank system, a transparent soil simulation system and a control and data acquisition system. The three systems work cooperatively to jointly realize the development of the submarine landslide evolution process simulation experiment.
The rotary water tank system comprises a rotary water tank supporting frame 1, a high-performance servo motor 2, a rotary drum tank 3 and an outer inner wall surface 4 of the drum tank. The bottom of the rotary water tank supporting frame 1 is fixedly connected with the ground; the high-performance servo motor 2 is arranged at the center of the rotary water tank supporting frame 1, is connected with the rotary drum tank 3 through a plurality of rigid rods, and is connected with the microcomputer 10 through a data connecting line 11; the inner layer of the rotary drum groove 3 is open, the outer layer is closed, the cross section of the drum groove is designed as an open U-shaped groove, and the inside of the drum groove is used for placing environmental fluid 6 and transparent soil samples 7; the outer layer inner wall surface 4 of the drum groove is a transparent inner wall surface of the outer layer of the rotary drum groove 3 and is used for simulating seabed surfaces with different roughness.
The transparent soil simulation system comprises a tracing dye 5, an environmental fluid 6 and a transparent soil sample 7. The tracer stain 5 is used for staining the environmental fluid 6 and the transparent soil sample 7. The environmental fluid 6 is a substance for simulating seawater configured based on a similarity criterion according to a transparent soil sample preparation technology; the transparent soil sample 7 is configured and consolidated based on a similar rule through a transparent soil sample preparation technology and is used for simulating substances of different types (with similar physical and mechanical properties) of submarine soil layers, and different shapes are further cut according to the marine geological investigation condition to develop a test.
The control and data acquisition system comprises three groups of laser transmitters 8, three groups of cameras 9, a microcomputer 10 and a data transmission line 11. The laser transmitter 8 is connected with the microcomputer 10 through a data transmission line 11, and is arranged in three directions in the space of the transparent soil sample 7 for transmitting laser. The three groups of cameras 9 are arranged in three directions in the space of the transparent soil sample 7, the arrangement direction of the cameras 9 is opposite to the arrangement direction of the laser transmitters 8, the three groups of cameras 9 are connected with the microcomputer 10 through the data transmission line 11 and are used for recording and capturing the three-dimensional evolution process of the transparent soil sample 7, and each group of cameras 9 comprises an industrial camera and a motion camera. The microcomputer 10 is used for controlling the high-performance servo motor 2, the laser transmitter 8 and the camera 9 to work and rapidly switch various modes, and collecting data and images of the servo motor 2 and the camera 9.
A submarine landslide evolution process simulation experiment method based on a transparent soil rotary water tank is realized based on the simulation system and comprises the following steps:
Firstly, a typical seabed landslide sample characteristic is generalized through a seabed soil layer physical and mechanical characteristic database established by ocean in-situ test and indoor geotechnical test and the related characteristic of a landslide body in a literature, and the method comprises the following steps: physical and mechanical characteristic parameters such as strength, density, water content, geometric form and the like.
Then, considering the geometric characteristics, density, strength, water content and the like of the landslide body in the initial state, based on the transparent soil technology, a mixture of amorphous silicon powder, white oil and n-dodecane is to be adopted to prepare a transparent soil sample 7 with uniform trace dye 5, for example, the transparent soil sample 7 with density of 1200-1600kg/m 3, water content of 80-120% and non-drainage shear strength (tested by a full flow penetrometer) of 2-10kPa is prepared. Further, an environmental fluid 6 (tested by a viscosimeter) with a tracer dye 5 similar to the seawater environment is prepared by mixing white oil, n-dodecane and a tracer dye.
Then, the rotary water tank supporting frame 1, the high-performance servo motor 2, the rotary drum tank 3 and the outer inner wall surface 4 of the drum tank are designed, processed and checked, wherein the water tank is designed to be used for rotating with the outer diameter of 1.5m, the inner diameter of 1m and the working thickness of 0.2m, the high-performance servo motor 2 is arranged at the center of the water tank to ensure the rotation stability, the CCD industrial camera, the GoPro motion camera 9 and the laser transmitter 8 corresponding to the GoPro motion camera are arranged in three directions, and the control and data acquisition of all devices are completed by the microcomputer 10 through the data transmission line 11, so that the safety and the intelligence are ensured.
Furthermore, the transparent soil sample 7 was taken out of the preparation apparatus, and different sizes required for the experiment were cut out in consideration of the geometry of the real landslide body according to the working space of the rotary water tank. And according to the geological conditions of the real seabed, the roughness of the outer boundary of the water tank is generalized and determined, the inner wall surface 4 of the outer layer of the drum tank is determined, and the real seabed environment is simulated. The transparent soil sample 7 is placed in the rotary drum tank 3, and the environmental fluid 6 is injected, so that the transparent soil sample 7 is completely immersed in the environmental fluid 6.
Finally, each sample was subjected to a spin-sink experiment at different speeds (0.25 m/s, 0.5m/s, 1m/s, 2.5m/s, 5m/s are to be used). Based on PIV technology, respectively starting three-directional CCD industrial cameras, three-directional GoPro motion cameras 9 and laser transmitters 8 corresponding to the three-directional GoPro motion cameras, quantitatively acquiring the invasion process of the tracer fluid through a three-dimensional slicing technology (adjusting slicing positions of three directions in different spaces), and comprehensively determining the whole decomposition evolution process in the landslide body motion process. And parameters such as acceleration, speed, displacement, stress, morphological evolution and the like of the landslide body are calculated by collecting the kinematic parameters and the geometric parameters of the landslide body, the whole process of the evolution of the landslide body from the block to the homogeneous fluid is analyzed, related action mechanisms and evolution modes are generalized, and an evolution model is provided.
The examples described above represent only embodiments of the invention and are not to be understood as limiting the scope of the patent of the invention, it being pointed out that several variants and modifications may be made by those skilled in the art without departing from the concept of the invention, which fall within the scope of protection of the invention.
Claims (4)
1. The submarine landslide evolution process simulation system based on the transparent soil rotary water tank is characterized by comprising a rotary water tank system, a transparent soil simulation system and a control and data acquisition system, wherein the rotary water tank system enables a rotary drum tank (3) to rotate by controlling a high-performance servo motor (2), different speeds are given to samples, and the sliding distance of the samples can be controlled by a closed U-shaped tank of the rotary water tank; the transparent soil simulation system prepares a visual sample and fluid environment similar to the physical and mechanical properties of a real seafloor soil layer, and achieves the whole visualization of the interior, the exterior and the interface of the sample evolution process; the control and data acquisition system achieves three-dimensional quantitative data extraction in the whole evolution process through a three-dimensional laser slicing technology, an industrial camera and a motion camera acquisition method, and the three systems work cooperatively;
The rotary water tank system comprises a rotary water tank supporting frame (1), a high-performance servo motor (2) and a rotary drum tank (3); the bottom of the rotary water tank supporting frame (1) is fixedly connected with the ground; the high-performance servo motor (2) is arranged at the center of the rotary water tank supporting frame (1), is connected with the rotary drum tank (3) through a plurality of rigid rods, and is connected with the microcomputer (10), and the microcomputer (10) provides different stable or variable rotation angular velocities for the rotary drum tank (3); the inner layer of the rotary drum groove (3) is open, the outer layer of the rotary drum groove is closed, the cross section of the drum groove is designed as an open U-shaped groove, the interior of the rotary drum groove (3) is used for placing environmental fluid (6) and transparent soil samples (7), and the transparent inner wall surface of the outer layer of the rotary drum groove (3) is a drum groove outer layer inner wall surface (4) and is used for simulating seabed surfaces with different roughness;
The transparent soil simulation system comprises a tracing dye (5), an environmental fluid (6) and a transparent soil sample (7); the environmental fluid (6) is a substance which is configured according to the transparent soil sample preparation technology and based on the similarity criterion and is used for simulating sea water; the transparent soil sample (7) is configured and consolidated by a transparent soil sample preparation technology based on a similar rule and is used for simulating substances of different types of submarine soil layers; the environmental fluid (6) and the transparent soil sample (7) are dyed by the tracer dye (5) to prepare different colors with obvious difference, and the colors are identified by the camera (9), so that the internal evolution condition and the external change condition of the transparent soil sample (7) in the rotating process of the rotary drum groove (3) and the material exchange process of the interface of the transparent soil sample (7) and the environmental fluid (6) are accurately monitored;
The control and data acquisition system comprises three groups of laser transmitters (8), three groups of cameras (9) and a microcomputer (10); the laser transmitters (8) are connected with the microcomputer (10) and are arranged in three directions in the space of the transparent soil sample (7), so that the technical requirements of laser speckle required by the transparent soil technology are met; the three groups of cameras (9) are arranged in three directions in the space of the transparent soil sample (7), the arrangement direction of the cameras (9) is opposite to the arrangement direction of the laser transmitters (8), the three groups of cameras (9) are connected with the microcomputer (10) and are used for recording and capturing the three-dimensional evolution process of the transparent soil sample (7), the whole evolution process is quantitatively analyzed through a digital image processing technology, the speed and acceleration evolution process of the sample and fluid are determined, and the stress state of the sample is estimated according to the speed and acceleration evolution process; the microcomputer (10) is used for controlling the work of the high-performance servo motor (2), the laser transmitter (8) and the camera (9) and the conversion of multiple modes, and collecting data and images of the servo motor (2) and the camera (9).
2. The submarine landslide evolution process simulation system based on the transparent soil rotary water tank according to claim 1 is characterized in that the main body of the rotary drum tank (3) is made of organic glass, grid positioning lines are drawn according to actual needs, and the system is supported by a steel skeleton.
3. A system for simulating the evolution of a sea floor landslide based on a transparent soil rotating flume according to claim 1 or 2, characterized in that each group of cameras (9) comprises an industrial camera, a motion camera; the industrial camera is used for combining the laser of the laser emitter (8) and accurately identifying the speed field evolution condition of each section particle of the transparent soil sample (7) and the environmental fluid (6) based on the PIV technology; the motion camera is used for shooting pictures of each moment of the landslide body in the whole experimental process, recording the integral evolution condition of the landslide body, and calculating the speed, acceleration and stress information of the landslide body.
4. The submarine landslide evolution process simulation experiment method based on the transparent soil rotary water tank is characterized by comprising the following steps of:
firstly, selecting a tracer dye (5) according to the requirements of the experimental overall design; then, based on the similarity criteria, configuring an environmental fluid (6) for simulating sea water according to the transparent soil sampling technique; preparing transparent soil slurry with a tracer stain (5), and solidifying a transparent soil sample (7) with a seafloor soil layer with similar physical and mechanical properties through the transparent soil slurry; finally, cutting out a specific shape meeting the overall experimental design requirement;
Secondly, constructing a rotary water tank supporting frame (1), a high-performance servo motor (2) and a rotary drum tank (3), and checking and debugging three devices; according to experimental requirements, determining a transparent paving material of the inner wall surface (4) of the outer layer of the drum groove;
Thirdly, placing a transparent soil sample (7) in the rotary drum groove (3) and injecting environmental fluid (6); placing laser transmitters (8) in three directions and cameras (9) in three directions, and connecting the laser transmitters and the cameras with a microcomputer (10) to finish experimental preparation work;
Step four, starting the whole experiment through a microcomputer (10), and carrying out the experiment according to a preset mode; in the rotating process of the rotary drum groove (3), the distance is not limited in the motion evolution process of the transparent soil sample (7) through the rotary drum groove (3), and the inner wall surface (4) of the outer layer of the groove, the environmental fluid (6) and the transparent soil sample (7) have relative motion; under different movement modes and under the action of environmental fluid (6), the solid transparent soil sample (7) is continuously evolved into a fluid state;
in the rotating process of the rotating drum groove (3), accurately identifying the three-dimensional evolution process of the environmental fluid (6) and the transparent soil sample (7) through the three-direction laser transmitters (8) and the three-direction cameras (9);
fifthly, after the experiment is completed, the power is cut off, an experimental device and a field are cleaned, data are extracted, and analysis is carried out;
Through preparing transparent soil samples (7) and environmental fluid (6) with different physical and mechanical properties, the shape and the size of the transparent soil samples (7) are changed, the height of the environmental fluid (6) is changed, the roughness of the inner wall surface (4) of the outer layer of the groove is changed, and the accurate simulation of different submarine landslide evolution processes is realized.
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