AU2019436654B2 - Simulation system and experiment method for whole evolution process of submarine slides based on a transparent clay rotating flume - Google Patents
Simulation system and experiment method for whole evolution process of submarine slides based on a transparent clay rotating flume Download PDFInfo
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Abstract
A simulation system and an experiment method for a whole evolution process of
submarine slides based on a transparent clay rotating flume belong to the technical
field of marine geological disasters and geotechnical engineering experiments. The
simulation system comprises a rotating flume system, a transparent clay simulation
system and a control and data collection system. The rotating flume system drives the
flume to rotate by controlling a motor to provide different velocities for samples. The
uninterrupted ring structure of a U-shaped section rotating flume is used to meet the
requirement that a sliding distance is unlimited. The transparent clay simulation
system prepares transparent clay samples with tracer stains and ambient fluids with
tracer stains, both of them having similar physical and mechanical properties as real
marine clays and seawater, and achieves full three-dimensional visualization of the
interior, exterior and fluid-clay interfaces of the whole evolution process of the
sample. The control and data connection system achieves quantification monitoring
and data extraction of the whole evolution process through a three-dimensional laser
slicing technology and a digital image collection method. The simulation system
provided by the present invention has the controlled scale, visual evolution process,
measurable image data and can solve the problems of difficulty in conducting a
long-distance evolution experiment, difficult data collection and unclear monitoring
figure.
Description
SIMULATION SYSTEM AND EXPERIMENT METHOD FOR WHOLE EVOLUTION PROCESS OF SUBMARINE SLIDES BASED ON A TRANSPARENT CLAY ROTATING FLUME Technical Field The present invention belongs to the technical field of marine geological disasters and geotechnical engineering experiments, relates to physical experiment simulation of the whole evolution process of marine geological disasters such as submarine slides, and provides a simulation system and an experiment method for the whole evolution process of submarine slides based on a transparent clay rotating flume with respect to the problems of difficulty in conducting a long-distance evolution experiment of a slide body (especially a clayey slide body), difficult collection of experimental data and unclear monitoring figure in a whole experiment process. Background The submarine slide is a most common marine geological disaster, and is widely distributed in offshore deltas, continental shelves, continental slopes and deep-sea basins. The submarine slide is specifically manifested as local or extensive sliding of marine soils, and is also one of the most important geological processes for the marine sediment transport. Once a submarine slope becomes unstable, it can directly cause the seabed collapse and foundation failure, further resulting in a large deformation of the slide mass, sliding, and high-speed impact, thereby causing huge damage to offshore engineering and affecting the development of marine resources. Some large-scale submarine slides can also induce catastrophic tsunamis, causing huge casualties and property losses. Unlike landslides, the submarine slides occur underwater, are extremely difficult to observe, and lack real and reliable observation data up to now. After a subsequent investigation, it is found that even in an extremely small slope, the submarine slides may occur, and have the outstanding characteristics of high sliding velocity, long migration time and wide affected area. Therefore, understanding the instability mechanism and whole evolution process of submarine slides is of great significance to site selection in the early stage of engineering construction and disaster assessment of the existing engineering. At present, many researchers have specifically classified and staged submarine slides. However, restricted by the lack of real observation data, the difficulty in reproducing the whole evolution process of a submarine slide by the experimental technical means and the lack of theoretical basis for the numerical simulation, the mechanism analysis of the whole evolution process of submarine slides is still a frontier, hot-spot and difficult scientific issue for a period of time. It can be seen from the above that it is very difficult to collect field data and in-situ data of the generating process of the submarine slides. In addition, theoretical analysis lacks the support of measured data. Therefore, a laboratory experiment is the most effective means to research the whole evolution process of the submarine slides. However, the scale of the laboratory experiment is very limited. A conventional channel experiment can only research a very short segment (only a few to tens of seconds) of a specific stage of a submarine slide, and is difficult to reproduce the whole evolution process of the submarine slide. Even if there is a small-scale channel experiment, the experiment is only used for homogeneous debris flow stage of sandy submarine slides, and cannot monitor the internal change of the slide evolution and explore the internal mechanism. More importantly, submarine slides, especially deep-sea slides, mainly include fine-grained clay. Once the channel experiment is carried out, the two-phase medium of water and clay is exchanged violently, causing turbidity instantaneously. Images and data inside and outside the evolution process cannot be collected, and real quantitative results cannot be provided. At present, there have been a large number of research foundations to prepare transparent clay samples with similar physical and mechanical properties as real marine clays and fluids (i.e., seawater) based on similarity principles and explore the deformation process inside the solid sample under the action of fixed external load, but the internal mechanism of the slide evolution also cannot be explored. Therefore, the development of a controlled, visual and measurable experiment system and method based on a transparent clay technology is an effective prerequisite and technical guarantee for studying the whole evolution process of submarine slides.
Summary In order to solve the defect or even gap of the current experiment device for the
whole evolution process of submarine slides, the present invention provides an
experiment system capable of effectively controlling, observing and testing the whole
evolution process of the submarine slides and having the function of studying the
whole evolution process of different types of submarine slides, and elaborates the
composition and the use method of each part, in order to meet the needs of qualitative
mechanism and quantitative parameter analysis for the whole evolution process of the
submarine slides.
To achieve the above purposes, the present invention adopts the following
technical solution:
A simulation system for the whole evolution process of submarine slides based
on a transparent clay rotating flume comprises a rotating flume system, a transparent
clay simulation system and a control and data collection system. The rotating flume
system controls a high-performance servo motor 2 to rotate a rotating flume 3, and
achieves the purpose of providing different velocities for a sample through relative
motion. The uninterrupted U-shaped flume of the rotating flume can meet the
requirement that the sliding distance of the sample is unlimited, and is controlled. The
transparent clay simulation system prepares visual samples and ambient fluids with
similar physical and mechanical properties as real marine clays and seawater through
accumulated sample preparation experience and technology based on the existing
similarity theory, to achieve full visualization of the interior, exterior and interface of
the whole evolution process of the samples to realize visualization. The control and
data connection system can achieve three-dimensional quantification data extraction
of the whole evolution process through a three-dimensional laser slicing technology
and industrial camera and motion camera collection methods, and can realize
measurability. The three systems perform collaborative work to jointly realize the
simulation experiment of the whole evolution process of the submarine slides.
The rotating flume system comprises a rotating flume supporting frame 1, a
high-performance servo motor 2, a rotating flume 3, and an inner wall surface 4 of a flume outer layer. The bottom of the rotating flume supporting frame 1 is fixedly connected with the ground. The rotating flume supporting frame 1 is a skeleton of the whole experiment system, and has the effects of supporting and stabilizing the whole experiment device and providing a required reaction force. The high-performance servo motor 2 is arranged at the center of the rotating flume supporting frame 1, is connected with the rotating flume 3 through a plurality of rigid rods, and is connected with a microcomputer 10 through a data connection line 11 to realize computer remote control, security and reliability, thereby providing different stable or variable rotational angular velocities for the rotating flume 3. An inner layer of the rotating flume 3 is open and an outer layer is uninterrupted. The section of the flume is designed into an open U-shaped flume. The interior of the flume is used for putting ambient fluids 6 and transparent clay samples 7. A main body of the rotating flume 3 is made of polymethyl methacrylate. Grid positioning lines are drawn according to actual needs, and a steel skeleton support is matched to ensure safety. The inner wall surface 4 of the flume outer layer is a transparent inner wall surface of the outer layer of the rotating flume 3, can update paving material according to experiment needs, and is used for simulating seabed surfaces with different roughnesses. The transparent clay simulation system comprises a tracer stain 5, the ambient fluids 6 and the transparent clay samples 7. The tracer stain 5 is used for staining the ambient fluids 6 and the transparent clay samples 7 for accurately distinguishing and acquiring the whole evolution process on interfaces between the ambient fluids and the transparent clay samples and the change inside the transparent clay samples. The ambient fluids 6 are materials for simulating seawater prepared based on the similarity criterion according to a transparent clay sample preparation technology. The transparent clay samples 7 are materials prepared and consolidated based on the similarity criterion through the transparent clay sample preparation technology for simulating different types (with similar physical and mechanical properties) of marine clay layers. Different shapes are further cut out according to the marine geological survey to conduct the experiments. The ambient fluids 6 and the transparent clay samples 7 are prepared with different colors with obvious distinction by the tracer stain 5, which is convenient for the recognition of cameras 9 and used to accurately monitor the internal evolution (including geometry variation, block disintegration and solid-fluid transformation) and the external change (including sample velocity, acceleration, and force change) of the transparent clay samples 7 during the rotation of the rotating flume 3; and the mass exchange process between the transparent clay samples 7 and the ambient fluids 6 includes invasion, separation and rupture. The control and data connection system comprises three groups of laser transmitters 8, three groups of cameras 9, a microcomputer 10 and a data transmission line 11. The laser transmitters 8 are connected with the microcomputer through the data transmission line 11, and are arranged in the space of the transparent clay samples 7 in three directions for transmitting laser to satisfy the technical requirements of laser speckle required by the transparent clay technology. The three groups of cameras 9 are arranged in the space of the transparent clay samples 7 in three directions. 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 for recording and acquiring the three-dimensional evolution process of the transparent clay samples 7, quantitatively analyzing the whole evolution process through a digital image processing technology, determining the whole evolution process of the velocity and the acceleration of the samples and the fluids, and evaluating the force state of the samples accordingly, wherein each group of cameras 9 includes an industrial camera and a motion camera. The industrial camera is responsible for accurately identifying the evolution of the velocity field of each section particle of the transparent clay samples 7 and the ambient fluids 6 based on the PIV technology in combination with the laser of the laser transmitters 8. The motion camera is responsible for taking pictures of the slide body at each moment in the whole experiment process, recording the whole evolution of the slide body, and calculating the information of the slide body such as velocity, acceleration and force. The microcomputer 10 is used for controlling the work of the high-performance servo motor 2, the laser transmitters 8 and the cameras 9 and the rapid conversion of multiple modes, and collecting data and images of the servo motor 2 and the cameras 9. The data transmission line 11 is used for connecting each part of the device. A simulation experiment method for a whole evolution process of submarine slides based on a transparent clay rotating flume is realized based on the above simulation system and comprises the following steps: First step: selecting the tracer stain 5 according to overall experiment design requirements; then, preparing the ambient fluids 6 for simulating seawater based on the similarity criterion and transparent clay sample preparation technology; further, preparing the transparent clay slurry with the tracer stain 5, and consolidating the transparent clay samples 7 of the marine clays with similar physical and mechanical properties; and finally, cutting out specific shapes that satisfy the overall experiment design requirements for conducting the experiment. Second step: building the rotating flume supporting frame 1, the high-performance servo motor 2 and the rotating flume 3, inspecting the stability and the safety of the three parts, and then carefully debugging each part of the device to ensure reliability and accuracy; and then selecting and replacing the transparent paving material of the inner wall surface 4 of the flume outer layer according to the experiment design requirements (seabed roughness). Third step: putting the transparent clay samples 7 into the rotating flume 3, and injecting the ambient fluids 6; placing the laser transmitters 8 in three directions, the cameras 9 in three directions and the microcomputer 10, and connecting through the data transmission line 11; debugging and setting the mode of each experiment component; and inspecting the power supply, connection and signal of each part to complete all the preparation work for the experiment. Fourth step: starting the entire experiment by the microcomputer 10, and conducting the experiment in a predetermined mode (uniform velocity and variable velocity), wherein during the rotation of the rotating flume 3, the inner wall surface 4 of the flume outer layer, the ambient fluids 6 and the transparent clay samples 7 move relative to each other; and then, under the action of the intrusion, obstruction and exchange of the ambient fluids 6, the solid transparent clay samples 7 are softened and undergo block disintegration to continuously evolve into a fluid state. Fifth step: after completing the experiment, cutting off the power and cleaning up the experiment device and site; extracting data; and carrying out data analysis and theoretical analysis. The working principle (innovation point) of the present invention is: firstly, two materials with different colors and high recognition are prepared based on the tracer stain 5, i.e., a solid transparent clay sample 7 and a liquid ambient fluid 6; then, based on the design of an infinitely long flume of the rotating flume 3, the purpose that the distance of the transparent clay sample 7 is not limited in the motion and evolution process is realized; further, the three-dimensional evolution process of the ambient fluid 6 and the transparent clay sample 7 is accurately identified through the laser transmitters 8 in three directions and the cameras 9 in three directions, including: the interface exchange process between the ambient fluid 6 and the transparent clay sample 7 in the long-distance migration and evolution process, and the process of the rupture, separation, and development to become a fluidized fluid (i.e., mudflow and gravity flow) for the transparent clay sample 7 are accurately distinguished through the tracer stain; next, based on the collected data, the quantitative velocity, acceleration and force for the ambient fluid 6 and the transparent clay sample 7 in the whole evolution process is accurately calculated, and a qualitative mechanism and a quantitative model are provided; finally, the transparent clay sample 7 and the ambient fluid 6 having different physical and mechanical properties are prepared to change the shape and the size of the transparent clay sample 7, change the height of the ambient fluid 6 and change the roughness of the inner wall surface 4 of the flume outer layer, so as to realize accurate simulation of the whole evolution process of different types of submarine slides. The present invention has the following effects and benefits: the experiment system has controllable scale, good economy, simple connection, and easy operation, and involves rich, advanced and reliable technology, can effectively realize the experimental simulation of the whole process of long-distance evolution of submarine slides, and can monitor the internal change of the sample and the evolution action of the fluid-clay interfaces in the evolution process in real time, so as to realize quantitative three-dimensional and multi-angle data collection and transmission, and provide hardware support for the complex evolution process of submarine slides. Description of Drawings Fig. 1 is an overall schematic diagram of an experiment system; Fig. 2 is a sectional view of a rotating flume; Fig. 3 is a top view of an experiment system. In the figures: 1 rotating flume supporting frame; 2 high-performance servo motor; 3 rotating flume; 4 inner wall surface of flume outer layer; 5 tracer stain; 6 ambient fluid; 7 transparent clay sample; 8 laser transmitter; 9 camera; 10 microcomputer; 11 data transmission line. Detailed Description Specific embodiments of the present invention are described below in detail in combination with the technical solutions (and accompanying drawings). A simulation system for the whole evolution process of submarine slides based on a transparent clay rotating flume comprises a rotating flume system, a transparent clay simulation system and a control and data collection system. The three systems perform collaborative work to jointly realize the simulation experiment of the whole evolution process of the submarine slides. The rotating flume system comprises a rotating flume supporting frame 1, a high-performance servo motor 2, a rotating flume 3, and an inner wall surface 4 of a flume outer layer. The bottom of the rotating flume supporting frame 1 is fixedly connected with the ground. The high-performance servo motor 2 is arranged at the center of the rotating flume supporting frame 1, is connected with the rotating flume 3 through a plurality of rigid rods, and is connected with a microcomputer 10 through a data connection line 11. An inner layer of the rotating flume 3 is open and an outer layer is uninterrupted. The section of the flume is designed into an open U-shaped flume. The interior of the flume is used for putting ambient fluids 6 and transparent clay samples 7. The inner wall surface 4 of the flume outer layer is a transparent inner wall surface of the outer layer of the rotating flume 3, and is used for simulating seabed surfaces with different roughnesses. The transparent clay simulation system comprises a tracer stain 5, the ambient fluids 6 and the transparent clay samples 7. The tracer stain 5 is used for staining the ambient fluids 6 and the transparent clay samples 7. The ambient fluids 6 are materials for simulating seawater prepared based on the similarity criterion according to a transparent clay sample preparation technology. The transparent clay samples 7 are materials prepared and consolidated based on the similarity criterion through the transparent clay sample preparation technology for simulating different types (with similar physical and mechanical properties) of marine clay layers. Different shapes are further cut out according to the marine geological survey to conduct the experiments. The control and data connection system comprises three groups of laser transmitters 8, three groups of cameras 9, a microcomputer 10 and a data transmission line 11. The laser transmitters 8 are connected with the microcomputer through the data transmission line 11, and are arranged in the space of the transparent clay samples 7 in three directions for transmitting laser. The three groups of cameras 9 are arranged in the space of the transparent clay samples 7 in three directions. 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 for recording and acquiring the three-dimensional evolution process of the transparent clay samples 7. Each group of cameras 9 includes an industrial camera and a motion camera. The microcomputer 10 is used for controlling the work of the high-performance servo motor 2, the laser transmitters 8 and the cameras 9 and the rapid conversion of multiple modes, and collecting data and images of the servo motor 2 and the cameras 9. A simulation experiment method for a whole evolution process of submarine slides based on a transparent clay rotating flume is realized based on the above simulation system and comprises the following steps:
Firstly, the characteristics of typical submarine slide samples are generalized through a marine clay layer physical and mechanical property database established by a marine in-situ test and an indoor geotechnical test, as well as related characteristics of the slide body in the literature, including undrained shear strength, density, water content, geometrical morphology and other physical and mechanical property parameters. Then, considering the geometric characteristics, density, undrained shear strength and water content of the slide body in the initial state, based on the transparent clay technology, a mixture of amorphous silicon powder, liquid paraffin and n-dodecane is used to prepare a transparent clay sample 7 with the uniform tracer stain 5, e.g., prepare a transparent clay sample 7 with density of 1200-1600 kg/m3
, water content of 80%-120% and undrained shear strength (tested by a full-flow penetrometer) of 2-10 kPa. Further, a mixture of the liquid paraffin, the n-dodecane and a tracer dye is used to prepare an ambient fluid 6 with the tracer stain 5 similar to a seawater environment (tested by a viscometer or rheometer). Next, the rotating flume supporting frame 1, the high-performance servo motor 2, the rotating flume 3 and the inner wall surface 4 of the flume outer layer are designed, processed and verified, wherein the flume is designed to have a rotating outer diameter of 1.5 m, an inner diameter of 1 m and a working thickness of 0.2 m. The center of the flume is provided with the high-performance servo motor 2 to ensure rotation stability. CCD industrial cameras, GoPro motion cameras 9, and corresponding laser transmitters 8 are placed in three directions. The control and data collection of all the devices are completed by the microcomputer 10 through the data transmission line 11 to ensure safety and intelligence. Moreover, the transparent clay sample 7 is taken out of the preparation device, and according to the working space of the rotating flume, by considering the geometry of the real slide body, different sizes required for the experiment are cut out. The roughness of the outer boundary of the flume is generalized and determined according to real seabed geological conditions to determine the inner wall surface 4 of the flume outer layer to simulate the real seabed environment. The transparent clay sample 7 is placed in the rotating flume 3 and the ambient fluid 6 is injected to ensure that the transparent clay sample 7 is completely immersed in the ambient fluid 6. Finally, each sample is subjected to a rotating flume experiment at different velocities (proposed 0.25 m/s, 0.5 m/s, 1 m/s, 2.5 m/s and 5 m/s). Based on the PIV technology, the CCD industrial cameras in three directions, the GoPro motion cameras 9 in three directions and the corresponding laser transmitters 8 are started respectively. The invasion process of the tracer fluid is quantitatively collected through the three-dimensional slicing technology (by adjusting the slicing positions in three directions in different spaces) to comprehensively determine the whole process of disintegration and evolution during the motion of the slide body. The kinematic parameters and the geometric parameters of the slide body are collected to calculate the acceleration, velocity, displacement, force, morphological evolution and other parameters of the slide body, analyze the whole evolution process of the slide body from block to homogeneous fluid, generalize relevant action mechanisms and evolution modes and propose an evolution model. The above embodiments only express the implementation of the present invention, and shall not be interpreted as a limitation to the scope of the patent for the present invention. It should be noted that, for those skilled in the art, several variations and improvements can also be made without departing from the concept of the present invention, all of which belong to the protection scope of the present invention. In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention.
Claims (6)
1. A simulation system for a whole evolution process of submarine slides based on a transparent clay rotating flume, wherein the simulation system for the whole evolution process of submarine slides comprises a rotating flume system, a transparent clay simulation system and a control and data collection system; the rotating flume system controls a high-performance servo motor (2) to rotate a rotating flume (3), and provides different velocities for a sample; the uninterrupted U-shaped flume of the rotating flume can realize a controlled sliding distance of the sample; the transparent clay simulation system prepares visual samples with similar physical and mechanical properties as real marine clays, and an ambient fluid, to achieve full visualization of the interior, exterior and interface of the whole evolution process of the samples; the control and data connection system achieves three-dimensional quantification data extraction of the whole evolution process through a three-dimensional laser slicing technology and industrial camera and motion camera collection methods, and the three systems perform collaborative work; the rotating flume system comprises a rotating flume supporting frame (1), a high-performance servo motor (2) and a rotating flume (3); the bottom of the rotating flume supporting frame (1) is fixedly connected with the ground; the high-performance servo motor (2) is arranged at the center of the rotating flume supporting frame (1), is connected with the rotating flume (3) through a plurality of rigid rods, and is connected with a microcomputer (10); the microcomputer (10) provides different stable or variable rotational angular velocities for the rotating flume (3); an inner layer of the rotating flume (3) is open and an outer layer is uninterrupted; the section of the flume is designed into an open U-shaped flume; the interior of the rotating flume (3) is used for putting ambient fluids (6) and transparent clay samples (7); the transparent inner wall surface of the outer layer of the rotating flume (3) is an inner wall surface (4) of the flume outer layer and is used for simulating seabed surfaces with different roughness; the transparent clay simulation system comprises a tracer stain (5), the ambient fluids (6) and the transparent clay samples (7); the ambient fluids (6) are materials for simulating seawater prepared based on the similarity criterion according to a transparent clay sample preparation technology; the transparent clay samples (7) are materials prepared and consolidated based on the similarity criterion through the transparent clay sample preparation technology for simulating different types of marine clay layers; the ambient fluids (6) and the transparent clay samples (7) are prepared with different colors with obvious distinction by staining via the tracer stain (5), and are identified through cameras (9) to accurately monitor the internal evolution and the external change of the transparent clay samples (7) during the rotation of the rotating flume (3), as well as the mass exchange process of the interfaces between the transparent clay samples (7) and the ambient fluids (6); the control and data connection system comprises three groups of laser transmitters (8), three groups of cameras (9) and the a microcomputer (10); the laser transmitters (8) are connected with the microcomputer (10), and are arranged in the space of the transparent clay samples (7) in three directions to satisfy the technical requirements of laser speckle required by the transparent clay technology; the three groups of cameras (9) are arranged in the space of the transparent clay samples (7) in three directions; 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) for recording and acquiring the three-dimensional evolution process of the transparent clay samples (7), quantitatively analyzing the whole evolution process through a digital image processing technology, determining the whole evolution process of the velocity and the acceleration of the samples and the fluids, and evaluating the force state of the samples accordingly; the microcomputer (10) is used for controlling the work of the high-performance servo motor (2), the laser transmitters (8) and the cameras (9) and the conversion of multiple modes, and collecting data and images of the servo motor (2) and the cameras (9).
2. The simulation system for the whole evolution process of submarine slides based on the transparent clay rotating flume according to claim 1, wherein a main body of the rotating flume (3) is made of polymethyl methacrylate; grid positioning lines are drawn according to actual needs; and a steel skeleton support is matched.
3. The simulation system for the whole evolution process of submarine slides based on the transparent clay rotating flume according to claim 1 or 2, wherein each group of cameras (9) comprises an industrial camera and a motion camera; the industrial camera is used for accurately identifying the evolution of the velocity field of each section particle of the transparent clay samples (7) and the ambient fluids (6) based on a PIV technology in combination with the laser of the laser transmitters (8); the motion camera is used for taking pictures of a slide body at each moment in the whole experiment process, recording the whole evolution of the slide body, and calculating the information of the slide body such as velocity, acceleration and force.
4. A simulation experiment method for a whole evolution process of submarine slides based on a transparent clay rotating flume, which is realized based on the simulation system for the whole evolution process of submarine slides according to any of claims 1-3, comprising the following steps: first step: firstly, selecting the tracer stain (5) according to overall experiment design requirements; then, preparing the ambient fluids (6) for simulating seawater based on the similarity criterion according to the transparent clay sample preparation technology; preparing transparent clay slurry with the tracer stain (5), and consolidating the transparent clay samples (7) of the marine clay layer with similar physical and mechanical properties through the transparent clay slurry; and finally, cutting out specific shapes that satisfy the overall experiment design requirements; second step: building the rotating flume supporting frame (1), the high-performance servo motor (2) and the rotating flume (3), and inspecting and debugging the three devices; determining the transparent paving material of the inner wall surface (4) of the flume outer layer according to the experiment requirements; third step: putting the transparent clay samples (7) into the rotating flume (3), and injecting the ambient fluids (6); placing the laser transmitters (8) in three directions and the cameras (9) in three directions and connecting the laser
1A transmitters (8) and the cameras (9) with the microcomputer (10) to complete the preparation work for the experiment; fourth step: starting the entire experiment by the microcomputer (10), and conducting the experiment in a predetermined mode, wherein during the rotation of the rotating flume (3), the distance of the transparent clay samples (7) is not limited in the motion and evolution process through the rotating flume (3); the inner wall surface (4) of the flume outer layer, the ambient fluids (6) and the transparent clay samples (7) move relative to each other; in different motion modes, under the action of the ambient fluids (6), the solid transparent clay samples (7) are continuously evolved into a fluid state; during the rotation of the rotating flume (3), the three-dimensional evolution process of the ambient fluids (6) and the transparent clay samples (7) is accurately identified through the laser transmitters (8) in three directions and the cameras (9) in three directions; fifth step: after completing the experiment, cutting off the power and cleaning up the experiment device and site; extracting data; and carrying out the analysis; the transparent clay samples (7) and the ambient fluids (6) having different physical and mechanical properties are prepared to change the shape and the size of the transparent clay samples (7), change the height of the ambient fluids (6) and change the roughness of the inner wall surface (4) of the flume outer layer, so as to realize the accurate simulation of the whole evolution process of different submarine slides.
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| US11567057B2 (en) * | 2018-11-26 | 2023-01-31 | Kun Fang | Landslide experimental device for simulating constant seepage flow |
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| CN107589235A (en) * | 2017-07-14 | 2018-01-16 | 华侨大学 | A kind of gas hydrate dissociation induces the simulation test device of submarine landslide |
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