碎石桩在强夯处理高饱和细粒土地基中的聚能和隔振作用

强夯法一般不适用于处理高饱和细粒土地基。但是,如果在该类地基中预先设置碎石桩,则能获得较好的处理效果。这是因为桩的聚能作用,减小了夯击能的传播损失,提高了每个夯坑的地基加固效果;桩的隔振作用,降低了夯击能对表层地基土的破坏、松动程度;桩的压重作用,减小了夯坑周围土体的隆起。碎石桩还有很好的挤土、置换等作用,从而提高了强夯法在该类地基处理中的适用性。

The Energy Gathering and Shake Off Effect of Gravel Pile in Treating High Saturation Fine-grained Soil Foundation with Dynamic Consolidation Method

The consolidation method is usually not suitable for treating high saturation fine-grained soil foundation. However, the better treatment effect can be gained if the gravel pile is sunk in this foundation before dynamic consolidation treating, because the energy gathering of pile let up the energy lose and increase the treatment effect of every hollow; the shake off effect of the pile cut down the shallow foundation soil damage; the weight of the pile can weigh down the soil and cut down its bulge. The gravel pile also has the effect of soil squeezing and replacement, and hence the suitability of the dynamic consolidation method in foundation treatment will be improved.