Numerical simulation method for high-altitude landslide impact shoveling and scraping and underlying bed afflux process

Abstract

The embodiment of the invention provides a numerical simulation method for high-altitude landslide impact shoveling and scraping and underlying bed afflux process. The method comprises the following steps: S1, building a landslide geometric model and an underlying strata geometric model; s2, establishing a lower cushion material model and selecting parameters; s3, performing numerical simulation calculation; s4, post-processing a calculation result; s5, performing result comparative analysis. The embodiment of the invention provides a numerical simulation method for a high-altitude landslide impact shoveling and scraping and underlying bed afflux process, and provides a process for simulating impact shoveling and scraping of an underlying bed after high-altitude starting of a sliding bodyand causing yielding of an underlying bed material and afflux of the underlying bed material into the sliding body by adopting an SPH and SDPH calculation method and adopting power contact and DP failure criteria as judgment conditions; therefore, help is provided for high-altitude landslide impact shoveling and scraping dynamics research, pre-disaster quantitative evaluation and post-disaster scientific rescue.

Description

technical field [0001] The invention relates to the technical field of geological disaster dynamics, in particular to a numerical simulation method for high-level landslide impact shoveling and the process of sinking into the underlying layer. Background technique [0002] In recent years, with the rapid development of social economy, the scale of human engineering activities has gradually increased, and high-level rock landslides frequently occur in mountainous areas in western my country. High-level rock landslides are different from debris flows, and have greater impact energy during movement. Once the surrounding mountains come into contact with high-speed sliding bodies, they will inevitably be loaded passively, forming an impact scraping effect, leading to damage or secondary landslides, and Change the motion state of the landslide and increase the hazard of the landslide. However, it may be difficult to record and capture the scooping phenomenon during the landslide,...

AI Technical Summary

Problems solved by technology

[0007] (1) The existing numerical simulation schemes 1 and 2 are relatively large in calculation amount and poor in calculation efficiency, and cannot quickly evaluate the impact shoveling effect of landslides;

[0008] (2) The existing numerical simulation method is based on the empirical method of shovel rate, without considering the actual physical and mechanical properties of the underlying material, and the simulation results are far from the actual situation;

[0009] (3) Most of the simulation results of the existing numerical simulation method 2 depend on the software parameter adjustment of particles and particles, particles and motion paths, and the simulation reliability is relatively poor compared with the actual situation

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