Experimental research on static and dynamic characteristics of cement soil under strain control

Abstract

Static and gradually increasing cyclic loading tests under strain control were investigated by GDS dynamic triaxial system in order to analyze the static and dynamic characteristics of cement soil.Static test results show that the strength of cement soil increases with the strain rate increases.The peak stress increases 47.57% when the strain rate being 5% compared to being 0.05%.The cement-mixing ratio determines the stress-strain relationship to be softening type or hardening type.The stress-strain relationship and the development law of dynamic modulus were analyzed.The empirical model of stress-strain relationship was conducted by modifying the hyperbolic model.The model had three parameters.The physical meaning and the determination method were discussed.Results show that the model is simple and practical,which can well reflect the stress-strain relationship of cement soil.