A Simulation Method for Landslide Sliding Process without Known Bottom Sliding Surface
A technology of process simulation and sliding surface, which is applied in the simulation of the sliding process of landslides without a known bottom sliding surface, in the field of simulating the sliding process of landslides. Effect
Active Publication Date: 2020-07-31
HOHAI UNIV
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[0006] Purpose of the invention: Aiming at the problem that the traditional simulation analysis method cannot simulate the landslide disaster situation without a known bottom slip surface, the present invention provides a method for simulating the sliding process of a landslide without a known bottom slip surface
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[0069] Taking the landslide simulation research of a certain river course as an example, the method for simulating the sliding process of the landslide without a known bottom sliding surface of the present invention is exemplified.
[0070] 1. Establish a continuum landslide model, such as figure 2 .
[0071] 2. Analyze the stability of the continuum landslide model, and determine the critical displacement of the sliding surface according to the shear deformation contour and displacement contour of the model. The displacement contour of the model is as follows image 3 .
[0072] 3. Use the compiled program to extract the coordinates of points on the sliding surface, generate a point cloud, and use the corresponding points of each sliding surface to fit the sliding surface in combination with the actual situation of the sliding surface. The sliding surface fitted in this example is as follows Figure 4 , the display of the slip surface in the continuum landslide model is as...
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The invention discloses a landslide sliding process simulation method without a known bottom sliding surface, and the method comprises the following steps: (1) building a continuous medium landslide model, analyzing the stability of the landslide model, and obtaining a displacement cloud picture and a strain rate cloud picture of the landslide model; (2) extracting coordinates of points on a sliding surface in the continuous medium landslide model, exporting a point coordinate file, fitting a corresponding sliding surface, and dividing the model into a sliding bed and a sliding body by using the sliding surface; (3) simulating a sliding bed and a sliding body by using a continuous medium and a discontinuous medium respectively to obtain a continuous-discontinuous medium landslide model; and (4) carrying out numerical calculation on the continuous-discontinuous medium landslide model, and determining the sliding process of the landslide and the accumulation condition of the sliding body. The simulation method solves the problem that a traditional method cannot simulate landslide disasters without a known bottom sliding surface, and meanwhile avoids the defects that a single discontinuous medium method is low in calculation speed and a continuous medium method cannot reflect the landslide sliding process and the sliding body accumulation condition.
Description
technical field [0001] The invention relates to a method for simulating the sliding process of a landslide, in particular to a method for simulating the sliding process of a landslide without a known bottom sliding surface, belonging to the field of slope engineering mechanics analysis. Background technique [0002] As a common geological disaster, landslides occur frequently under the conditions of rainfall, reservoir water level changes, earthquakes, and blasting operations. After the landslide occurs, the sliding body slides along the slope of the mountain and accumulates at the foot of the mountain. When a landslide occurs in a river valley and the scale is large, the landslide quickly accumulates in the river, blocking the flow of the river, raising the water level upstream, and easily forming a dam. The structure of the dam is unstable and belongs to unfavorable geological body. The formation of the dam body not only changed the local geology and landforms, but also ...
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IPC IPC(8): G06F30/20
Inventor 王环玲马行生徐卫亚王如宾
Owner HOHAI UNIV