Abstract: As one of the major laboratory test methods, the triaxial test are often performed to gain the strength and stress and strain behaviors of soils. There are two great important factors during consolidation process of the triaxial test, i.e. the dissipation of pore pressure and the completion status of the consolidation, which determine the conduct of the following shear process. Based on equal strain assumptions, an analytical solution is presented to analyse the pore pressure and the consolidation degree throughout the drainage consolidation process of the triaxial test. According to the laboratory triaxial consolidated drained (CD) test, the pore pressure and the consolidation degree of the drainage consolidation process are checked by using the analytical solution. The comparative results show that the two curves calculated by the analytical solution, including the curve of consolidation degree and the curve of pore pressure dissipation, are in good agreement with the corresponding curves gained by laboratory triaxial shear tests, which verifies that the analytical solution can be applied to analyze the drainage consolidation process of triaxial shear test.

Key words: triaxial test, triaxial consolidated drained test, consolidation process, pore pressure dissipation, drainage curve