A Numerical Simulation Method of Soil Collapse Based on the Principle of Mechanical Balance

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 gravitational erosion. Collapse refers to the steep slope section where the bedrock or parent material vertical joints such as the gully bank or river bank are relatively developed. When the water flow cuts and scrubs or manually excavates its base, the soil body of the steep wall loses balance, and the mass of soil is separated from the bank slope. The phenomenon of falling, falling or turning over. The sandy bank slopes of most rivers, including 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. Collapse will threaten the safety of river levees, cause the loss of a large number ...

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