Constitutive Model of Soil Damage in Sliding Zone under Cumulative Load of Microseismic Vibration
HUANG Yan
WU Tingyao
Abstract：Repeated microseismic vibration can easily lead to the failure of a high-steep slope with faults,and the shear strength of sliding zone soil is the key parameter for slope stability calculation.Therefore,based on the Lemaitre strain equivalence theory,it was assumed that the microelement strength of sliding zone soil followed the Weibull distribution.By considering the influence of the cumulative load of microseismic vibration on the shear strength of sliding zone soil,the cumulative damage variable of microseismic vibration load was introduced,and the constitutive model of cumulative damage of shear strength attenuation of sliding zone soil was established under the Mohr-Coulomb criterion.In addition,the model parameters were determined according to the extreme value characteristics of soil in the limit state,and compared with the test results of the shaking table model.The results show that the curves obtained by this model are in good agreement with those of shaking table tests,which can well reflect the mechanical characteristics of soil damage in sliding zone under the coupling effect of cumulative microseismic vibration load and normal stress load of the direct shear test.The research results can be applied to the stability evaluation of soft rock slopes or high-steep mine slopes with soft structural planes under repeated microseismic vibration disturbance.
Keywords：Micro-vibrationSliding zone soilCumulative damageWeibull distributionConstitutive model
Publication Date：2024-09-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 99-108 )