Discussion on the effective stress of unsaturated soils
Due to the seasonal variation of unsaturated soil strength,the lack of unified effective stress formula of unsaturated soils in engineering makes it impossible to accurately warn and prevent,resulting in slope land-slide,collapse and many other problems for unsaturated soils.Based on the theory of Terzaghi's effective stress and principle of three-phase medium in soil mechanics,the interaction force between soil particles in un-saturated soil is derived and the effective stress formula of unsaturated soil is established.On this basis,con-sidering different situations of principle of conservation of strain work and energy,gas-water transport and stress balance of unsaturated soils,the scientificness of the effective stress formula of the unsaturated soil is further demonstrated.Meanwhile,the effective stress formula is calculated and verified by different experi-mental data of unsaturated soil shear strength,which proves its correctness and effectiveness.The research re-sults show that the effective stress formula of unsaturated soils can be applied to saturated and unsaturated soils and is convenient for the design of related engineering and the application of disaster control.
万方数据
维普
