桩体加固液化砂土模型地基沉降分析

Study on Settlement of Liquefiable Sand Soil Model Improved by Pile

通过对两种桩体(砂桩和水泥土桩)及两种桩体联合加固液化砂土的振动台试验,分析了未加固及不同桩体加固液化砂土模型地基孔隙水压力和沉降变化规律,深入研究了不同桩体加固砂土的抗液化特性。得出水泥土桩抑制土体沉降作用最明显,两种桩联合加固次之,碎石桩最差;碎石桩的抗液化效果最好,两种桩联合加固次之,水泥土桩最差。为今后实际工程加固液化土地基提供一定参考。

By the shaking table experiment, analyzed the variation of excess pore water pressure and settlement in non-improved soil and the soil improved with sand-gravel pile, cement-soil pile, and the two kinds of piles uniting. On inhibiting settlement, soil improved with cement-soil pile had the best result, soil improved with two kinds of piles unite takes second place, soil improved with sand-gravel pile had the worst result;On the anti-liquefaction effect, soil improved with sand-gravel pile had the best result, soil improved with two kinds of piles unite takes second place, soil improved with cement-soil pile had the worst result, which provided some reference for reinforcing liquefiable sand soil in actual engineering in future.