Mechanical Properties and Damage Modelling of Slip Zone Soil of Deposit at the Reservoir Bank Based on Rainfall-Reservoir Water Action
The evolution of the mechanical properties of the subsoil under the reciprocating action of reservoir water and rainfall is an intrinsic control factor for the formation,development and damage of landslides along the reservoir bank.The degradation mechanism and mechanical damage characteristics of slide zone soils under wet and dry cycling were investigated based on macro and micro indoor tests and theoretical analyses,and a microscopic damage evolution model based on macroscopic strength was established.The results show that the internal friction angle and cohesive force of the slip zone soil tend to decrease with the increase of the number of wet and dry cycles,and the deterioration rate of shear strength increases significantly with the increase of the degree of wet and dry cycle disturbance;Hydrophilic miner-als and hydrodynamic effects under wet and dry cycles make the microstructure of the soil samples change from dense to loose and porous,and the inter-particle microcracks and primary pores increase rapidly.The proposed macro-micro dam-age model based on damage mechanics and indoor experiments can effectively characterize the deterioration pattern of sub-soil under wet and dry cycling.
reservoir bank slopeswet-dry cyclesstrength deterioration ratedamage model
万方数据
维普
