Quantitative analysis method of slope instability consequence

Abstract

A quantitative analysis method of slope instability consequence is disclosed. At first, that critical slip surface is calculated by the limit equilibrium method, Secondly, the displacement field of the landslide is calculated by using the smooth particle hydrodynamics method, and then the effective displacement threshold is determined by comparative analysis, Then a series of slope instability conditions are used to fit the relationship between the final sliding surface area of slope instability and its safety factor, Finally, the sliding area under the condition of safety factor less than 1is calculated by using the fitting relationship, and the sliding surface area histogram is used to quantify the consequences of slope instability, which overcomes the shortcomings of the traditional method, such as poor quantification effect of slope instability consequences, and can reasonably and effectively quantify the consequences of slope instability, which is of great significance for the prevention and control of landslide risk.

Description

technical field [0001] The invention belongs to the technical field of slope disaster evaluation and prevention, and specifically relates to a new method for quantitative analysis of slope instability consequences, in particular to a method based on smooth particle hydrodynamics to determine the final sliding surface of slope instability, and then to limit equilibrium The minimum safety factor calculated by the method is used to establish a relationship, and finally quantify the consequences of slope instability. Background technique [0002] In the field of slope disaster prevention and control, slope stability analysis methods such as limit equilibrium method and finite element strength reduction method are generally used to search for the minimum safety factor, and the corresponding critical sliding surface is used to evaluate the consequences of slope instability. However, for slopes that are on the verge of instability or have already become unstable, the critical slidi...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the critical sliding surface obtained by using the conventional limit equilibrium method or the finite element strength reduction method in the prior art is only the sliding surface at the initial moment of the landslide, and there is a certain difference with the final sliding surface. It leads to defects such as poor quantification of slope instability consequences, and provides a new method for quantifying slope instability consequences

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