Experimental study on dynamic stress dynamic strain relationship and dynamic modulus of reinforced expansive soil

Abstract

Dynamic triaxial tests are carried out on saturated expansive soil of Qinchong Road, Guangxi at different compaction degrees, numbers of reinforced layers, confining pressure, dynamic stress dynamic strain relationship, and dynamic modulus attenuation law under frequency combination to study the dynamic characteristics of reinforced saturated expansive soil under different influencing factors. Results show that the dynamic constitutive relationship of the saturated expansive soil when the loaded waveform is a half-sine wave conforms to the R. L. Kondner hyperbolic model; the dynamic elastic modulus decreases with the increase of dynamic strain, and the relevant fitting parameters are given. A dynamic elastic modulus attenuation model considering different degrees of compaction, numbers of reinforced layers, confining pressure, and frequency is proposed through regression analysis of the test results.