Experiment Study on Rheological Model of Soft Clay

Abstract

This paper adopts the conventional tri-axial apparatus to respectively conduct tri-axial rheological tests on soft clay of different confining pressures by multi-stage loading vertical stress, specifically on the rheological behavior of the soft clay in Beijing area. The experimental results show that the deformation of this kind of clay has obvious time effects and nonlinear characteristics. According to the results, the test is to propose generalized Kelvin three unit and five unit model. Power function creep model and time hardening experiential models are used to describe the clay rheological behavior. The results show that, time hardening creep model is an advanced model with high accuracy, simple equations and fewer parameters and establishes a typical clay rheological model that fits Beijing area.