Effects of Shear Rate on Mechanical Behavior of Structured Loess

During the deformation process the structure of original loess will be destroyed.The strength characteristics of loess during construction are not always the same,because of different construction speed of the project.Therefore,in order to fully understand the structural mechanical properties of loess,it is necessary to study natural structured loess and consider the effects of shear rate.In this paper,based on the triaxial test,it is discovered that the structured loess has special mechanical effect of shearing strain rate,and it is proved that the structured loess also has the phenomena of strain rate softening.The CU shear strength and cohesion c increase at first,then decrease with the increase of strain rate,and a critical rate exists;the angel of internal friction doesn't change visibly with the strain rate.