Deformation and failure characteristics of Tengger Desert Sand under different intermediate principal stresses

Abstract

In this paper, the true triaxial drainage shear tests were carried out for the Tengger Desert Sand under different intermediate principal stress coefficients by the British GDS dynamic and static true triaxial test system. The influence of intermediate principal stress on the deformation and failure of Tengger Desert Sand and the evolution of deviatoric stress and volumetric strain with intermediate principal stress coefficient were studied. The following results were found. The intermediate principal stress had a great influence on the Tengger Desert Sand deformation. With the increase of the principal stress coefficient, deviatoric stress increases first and then remains approximately unchanged, volumetric strain increases.