Earth slope seismic stability analysis method combining equal reference unit method and sliding surface method

Abstract

The invention discloses an earth slope seismic stability analysis method combining an equal parameter unit method and a sliding surface method. The earth slope seismic stability analysis method comprises the following steps that firstly, the static load is applied in a grading mode, according to the change conditions of the stress strain in the soil after applying static load of each stage, and the mechanical parameters are corrected, a constitutive model is constructed as a mathematical model of the stress-strain relation according to actual stress strain characteristics, after all the staticloads are applied, and the calculated accumulated stress is the static stress in the preseismic earth slope; then, according to the anti-seismic design requirements of the earth slope, an earthquakeacceleration time-range relation is determined, and then inputting is carried out by adopting a two-stage time period method; and finally, the static force and the power reaction are calculated, and the effective force of certain points in the soil slope is obtained. According to the earth slope seismic stability analysis method, the problem that in the prior art, an earthquake, an soil slope structure and a power characteristic of the material cannot be considered at the same time in the soil slope stability analysis is solved.

Description

technical field [0001] The invention belongs to the technical field of geological engineering, and in particular relates to a soil slope seismic stability analysis method combining an isoparametric element method and a sliding surface method. Background technique [0002] Based on the current seismic stability analysis of soil slopes, most of them use the equivalent load method. This method can effectively consider the dynamic characteristics of the earthquake and the dynamic characteristics of the structure, but it ignores important material issues. Soil materials Its own dynamic characteristics, that is, the hysteresis of stress and strain, are not considered in the seismic analysis. [0003] A large number of test results show that due to the unique particle characteristics of the soil material, there is an obvious nonlinearity between the stress and strain of the soil under the action of dynamic load, and due to the existence of soil damping, it shows a strong hysteresis...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a soil slope seismic stability analysis method combining the isoparametric element method and the sliding surface method, which solves the problem that the earthquake, soil slope structure and material cannot be combined in the soil slope stability analysis in the prior art. The dynamic characteristics of the simultaneous consideration of the problem

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