细粒含量对强夯加固粉细砂效果的影响

Effect of fine content on consolidation of silty fine sand by dynamic compaction

使用强夯法处理粉细砂地基时,粉细砂中的细粒含量会对强夯法的加固效果产生较大影响。针对粉细砂中细粒含量对强夯加固效果影响的问题,对强夯法加固不同细粒含量粉细砂的适用性进行研究,采用室内模型试验的方法,得出细粒含量对强夯夯沉量、超静孔隙水压力及加固效果的影响,并提出相应的现场施工建议。结果表明:细粒含量对强夯加固均质粉细砂的效果存在较大影响;10%细粒含量为转折点,当细粒含量大于10%后,细粒含量越高,强夯法适用性越低。

The fine content of fine sand will have a great impact on the reinforcement effect of the dynamic compaction method when treating the silty fine sand foundation by the dynamic compaction method.Aiming at the problem of the influence of fine content in silty fine sand on dynamic compaction reinforcement effect,we study the applicability of dynamic compaction method with different fine content of silty sand,obtain the influence of fine particle content on dynamic compaction settlement,excess pore water pressure and reinforcement effect by the model test in the laboratory,and put forward the corresponding construction suggestions.The results show that the fine content has much influence on the effect of dynamic consolidation of homogeneous silty fine sand.Ten percent of the fine particle content is the turning point.When the content of fine particles is more than 10%,the higher the content of fine particles is,the lower the applicability of the dynamic compaction method is.