Abstract
Tests on soft sedimentary rock under conventional triaxial and plane-strain compression and/or creep have been conducted. The purpose of the tests is to investigate the influence of intermediate principal stress that may affect the strength and dilatancy of the soft sedimentary rock under different loading paths. Meanwhile, theoretical simulations by an elasto-viscoplastic constitutive model were also conducted. Influence of membrane and filter paper was investigated using finite element analysis based on the elasto-viscoplastic model. Furthermore, particular attention was paid to the migration of excessive pore water pressure within a specimen, by continuous monitoring of the inner excessive pore water pressure of specimens and calculation with soil-water coupled finite element-finite difference (FE-FD) method. The shear strength, inherent dilatancy and creep behavior of soft rock were explained experimentally and numerically in detail.
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