Submarine landslide evolution process simulating system and experimental method based on transparent soil and rotating water tank

Abstract

The invention relates to a submarine landslide evolution process simulating system and experimental method based on transparent soil and a rotating water tank, and belongs to the technical fields of marine geological disasters and geotechnical engineering experiments. The simulating system comprises a rotating water tank system, a transparent soil simulating system and a control and data collection system. The rotating water tank system sets different speeds for a sample by means of a control motor, and a closed circular ring structure of a U-shaped section rotary drum groove satisfies that the sliding distance is not limited; the transparent soil simulating system prepares a transparent sample, with a tracer coloring agent, and fluid environment whose physical mechanical property is the same with that of a real submarine soil layer, so that the internal, external and water-soil interface is visualized in a 3D way in the whole sample evolution process; and the control and data collection system realizes quantitative monitoring and data extraction of the evolution process by means of 3D laser slicing and digital image collection. The provided system is controllable in the scale, visualized in the evolution process, capable of measuring image data, and can solve the problems that a long-distance evolution experiment is hard to carry out, data acquisition is difficult, and a monitoring picture is not clear.

Description

technical field [0001] The invention belongs to the technical field of marine geological disasters and geotechnical engineering experiments, and relates to the physical experiment simulation of the evolution process of marine geological disasters such as submarine landslides. It is difficult to carry out long-distance evolution experiments of landslides (especially clay landslides) and collect experimental data. It provides a simulation system and experimental method for the evolution process of submarine landslides based on the transparent soil rotating tank. Background technique [0002] Submarine landslides are the most common marine geological hazards, widely distributed in offshore deltas, continental shelves, continental slopes, and deep-sea basins. It is specifically manifested as local or large-scale sliding of seabed soil, and is also the most important geological process of seabed sediment migration. one. Once the submarine slope becomes unstable, it will cause se...

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Problems solved by technology

However, the scale of indoor experiments is very limited. Conventional flume experiments can only study a very short segment (only a few to tens of seconds) of a specific stage of a submarine landslide, and it is difficult to reproduce the entire evolution process of a submarine landslide, even if there is a small-scale rotation. Flume test, but it is only aimed at the homogeneous debris flow (debris flow) stage of sandy submarine landslides, and cannot monitor the internal changes of landslide evolution, and cannot explore its internal mechanism

More importantly, submarine landslides, especially deep-sea landslides, are mostly composed of fine-grained clayey soil. Once the tank test is carried out, the two media of water and soil will immediately exchange violently, causing turbidity instantly, and it is impossible to collect internal and external images and images of the evolution process. data, and it is impossible to give real quantitative results

At present, based on the similarity principle, preparing transparent soil samples with similar physical and mechanical properties to real clay and fluids, and exploring the deformation process inside solid samples has a large number of research foundations, but it also cannot explore the internal mechanism of landslide evolution.

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