Experimental Study on Dynamic Properties of Loess in Xining Area under Cyclic Loading

In order to study the dynamic characteristics of unsaturated loess in Xining area, this paper use GDS dynamic triaxial apparatus conduct the dynamic triaxial test indoor, the effects of different vibration times, water content and consolidation ratio on the hysteresis loop, dynamic elastic modulus and axial strain of unsaturated loess in Xining area were studied. The results show that: when the vibration times increase, the hysteresis loop from strain axis left moves to right and from sparse become tight; The higher moisture content and consolidation ratio, the hysteresis loop is nearer to large strain direction; With the increase of moisture content, the dynamic elastic modulus decreases of unsaturated loess, and the axial strain increases; With the increase of consolidation ratio, the dynamic elastic modulus and axial strain also increases. The dynamic elastic modulus and consolidation ratio have the same features of increase or decrease, axial strain, moisture content and consolidation ratio also have the same features of increase or decrease. The research results can provide reference for the study of dynamic characteristics and disaster prevention and mitigation of unsaturated loess under traffic load.