Soil body collapse numerical simulation method based on mechanical balance principle

Abstract

The invention discloses a soil body collapse numerical simulation method based on a mechanical balance principle, and relates to the technical field of soil body collapse simulation and computer numerical calculation. The method comprises: generalizing the shape of a collapsed soil body; determining that the cross section of the collapsed soil body comprises a trapezoid; selecting a pre-collapsedsoil body, a right triangle and a rectangle, acquiring geometric parameters of the pre-collapsed soil body, simulating stress of the pre-collapsed soil body with different section shapes according tothe geometric parameters, judging whether the soil body is collapsed or not according to a simulation result, and acquiring the quality of the soil body if the soil body is collapsed, thereby realizing numerical simulation of the collapsed gravity erosion soil body. Based on the most fundamental cause-mechanical instability mechanism of the collapse, the method provides a judgment condition for judging whether the collapse occurs or not, and simulates the collapse amount. The method is not limited by geographical and topographic factors and can be widely popularized and applied.

Description

technical field [0001] The invention relates to the technical field of soil collapse simulation and computer numerical calculation, in particular to a soil collapse numerical simulation method based on the principle of mechanical balance. Background technique [0002] Collapse is one of the common forms of gravity erosion. Collapse refers to the steep slope section where bedrock or parent material vertical joints such as ditch bank or river bank are relatively developed. The phenomenon of tipping, rolling or turning over. The sandy slopes of most rivers, such as the Mississippi River in the United States, the Rhine River in Europe, and the seven major rivers in my country, have collapsed to varying degrees. Collapses will threaten the safety of river embankments, lead to the loss of a large amount of good farmland and cultivated land, and affect the evolution of riverbed erosion and siltation and ship navigation. "The formation directly affects the safety of the "hanging ...

AI Technical Summary

Problems solved by technology

This method does not involve the mechanical mechanism of soil collapse, nor does it consider the randomness of collapse. The method has a low degree of refinement and a large calculation scale, and the simulation accuracy of soil collapse in small-scale trenches is low.

At the same time, the empirical parameters of various statistical methods are greatly affected by regional differences, and the methods are too specific and cannot be directly applied to other regions, making it difficult to promote them.

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