关键词: 动三轴试验, 振动孔隙水压力, 孔压发展模型, 固结比, 液化

Abstract: The research outcomes at home and abroad about dynamic pore water pressure developing models are firstly reviewed; then the dynamic triaxial tests which used saturated core cohesive soil and dam foundation gravel of a rockfill dam were performed; and Gu Gan-chen models of these two materials were put forward. And dynamic pore water pressure developing rules of gravel were analyzed in detail. The results of dynamic intensity tests show that with the increasing of vibration times and vibration intensity, dynamic pore water pressure increases. While with the increasing of consolidated stress ratio, dynamic pore water pressure decreases. For cohesive soil, in spite of equivalent-pressure or unequivalent-pressure consolidation, liquefaction phenomenon didn’t appear. For gravel, final dynamic pore water pressure could all reach confining pressure under equivalent-pressure consolidation, and when consolidated stress ratio Kc exceeds or equals to 1.5, whether samples could liquefy lied on that dynamic stress σd could make samples stretch or not. And the effects of consolidated stress ratio Kc on various soils were different.

Key words: dynamic triaxial test, dynamic pore water pressure, pore water pressure developing model, consolidated stress ratio, liquefaction