CALCULATION OF STRESS AND DISPLACEMENT FIELD OF FROZEN WALL BY IMPROVED NISHIHARA MODEL
改进的西原模型及其在冻结壁上的应用

A great number of frozen clay specimens are used for the long-term creep tests under single-axial stress states. The results of experiment show that the transient deformation of the soil can be neglected and a simple yielding function can be used to replace the linear Newton element, to improve the Nishihara model for the triaxial nonlinear creep of frozen clay. By means of that improved model, a formula is derived to calculate the stress and displacement field of frozen wall. Calculation results are close to actual situations.