Study on mechanical properties of the gravelly soils with consolidated-undrained conditions

Abstract A standard stress path triaxial test system (STDTTS) was applied to study the mechanical properties of gravelly soil at initial relative densities of 0.13,0.5K 0.67 and 0.81 under confining pressures of 50,100,200 and 400 KPa, respectively. The results in the consolidated undrained tests show that all stress-strain curves behalf strain softening. With an increase of confining pressures, the pore pressure increases gradually and is almost irrelevant to initial relative density. With the increase of initial relative density, the peak strength of tested samples shows an uptrend, and its strength conforms to the Mohr-Coulomb strength criterion.