A Numerical Analysis Method of Landslide Considering the Effect of Soil Strain on Strength

Abstract

The invention relates to the field of numerical simulation calculation of geotechnical engineering, in particular to a landslide numerical analysis method considering the influence of soil strain on strength, by introducing the shear strain and shear strength of the soil on the sliding surface during the calculation process of rock and soil deformation of the landslide The relationship between the sliding surface is solved by using a cyclic iterative solution method, so that the shear strength of each unit body on the sliding surface is automatically adjusted according to the shear deformation of the position, and then according to the shear strain distribution of the sliding surface, the degraded sliding surface soil is obtained The spatial distribution of shear strength and the restoration of the real horizontal displacement field of the landslide provide a more realistic theoretical basis for the guidance of landslide reinforcement. At the same time, since the calculation accuracy Δ can be customized according to the actual situation, it is possible to Adjusting the calculation accuracy Δ is beneficial to improve the efficiency and accuracy of the calculation results, so that it can better match the actual working conditions and guide the actual work.

Description

technical field [0001] The invention relates to the field of numerical simulation calculation of geotechnical engineering, in particular to a landslide numerical analysis method considering the influence of soil strain on strength. Background technique [0002] Landslide disasters are widely distributed in my country, and landslide research has always been a hot issue in the field of geotechnical engineering due to the frequent occurrence of landslide disasters and the great harm. The numerical simulation method can fully restore the elastic-plastic mechanical behavior of the model, is low in cost, and can simulate various complex working conditions, so it has been widely recognized by researchers. However, the numerical simulation of landslides has important engineering practical value and theoretical significance. Only by fully studying Only by understanding the deformation and failure mechanism of landslides and choosing a reasonable analysis model and failure criterion c...

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Problems solved by technology

[0003] At present, the results of most indoor or field tests show that the shear strength parameters of the soil are related to the size of the plastic strain. Generally speaking, the greater the shear strain of the soil, the higher the degree of shear failure of the soil. The lower the shear strength parameter of the body, the more serious the deformation of the corresponding soil, and the greater the possibility of landslides. However, most of the traditional landslide numerical simulation methods do not consider the impact of soil shear strain on The influence of soil strength parameters, such as: the strength reduction method uniformly reduces the strength parameters of the soil, ignoring the influence of the shear failure degree of different parts of the landslide on the shear strength, resulting in calculation results that are inconsistent with the actual deformation of the soil There is a large difference in the situation, and the displacement of the soil cannot be truly obtained

[0004] Therefore, there is an urgent need for a technical solution to solve the defect that the existing landslide numerical simulation methods do not consider the influence of soil shear strain on soil strength parameters, resulting in large differences between the calculation results and the actual deformation of the soil. The technical problem that the displacement of the soil cannot be truly obtained

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