DYNAMIC TRIAXIAL EXPERIMENTAL STUDY ON WAVE-INDUCED STRENGTH WEAKENING OF SUBAQUEOUS YELLOW RIVER DELTA SILTY SOIL UNDER WAVE ACTION

Silty soil in the Chengbei region of the Yellow River Delta is prone to geological hazards including landslides, collapses, silt flow, etc. The failure of silty soil is closely correlated with its strength change induced by wave action. In this study, dynamic triaxial experiments were employed to explore the relationship between oscillation times and dynamic shear strength of silty soil in the Subaqueous Yellow River Delta by modeling wave-seabed interactions. This paper studies the change law of dynamic shear strength, cohesion and internal friction angle with the oscillation time. The results indicate that the strength weakening of silty soil follows the rule of power function attenuation. In addition, failure modes, variations in pore pressure together with the microstructures are also discussed in this paper through careful observation of the samples.