碎石桩加固液化砂土孔隙水压力变化

Pore Water Pressure Changes of Liquefiable Sand Soil Reinforced by Gravel Pile

通过振动台对未加固与碎石桩加固的液化砂土的宏观表现及孔隙水压力曲线、孔压比曲线比较,得到碎石桩加固液化地基土不仅有挤密增强土体抗液化效果,而且随着排水,土体强度也在逐渐增强。说明工程实际中碎石桩加固液化土只考虑挤密过于保守。

Through the macroscopic performance of shaking table t o liquefiable sand soil that is not reinforced and reinforced by gravel pile and the comparison between pore water pressure curve and pore pressure ratio curve, a conclusion can be drawn that liquefiable sand soil reinforced by gravel pile can not only enhance the effect of soil compaction on liquefaction,but also gra dually strengthened the soil strength along with the drainage.It is illustrated that in engineering practice,only considering the compaction of the liquefiabl e sand soil reinforced by gravel pile is too conservative.