碎石桩壳法加固软土地基的工程实例与探讨

Discussion on Weak Foundation Strengthened by Crushed Rock Pile Shuck Method

结合某高速公路K17+12 5两孔 5m× 3m石拱涵饱和软土地基强夯挤密碎石桩壳加固施工实例 ,探讨了强夯挤密碎石桩壳法提高地基承载力 ,减少地基沉降量的机理 ,分析了碎石硬壳层 ,碎石桩体及桩间土的应力分担作用 ,介绍了该法的设计计算理论和施工工艺。

Based on the practice of the saturated weak foundati on dynamic compaction crushed rock pile shuck strengthening construction of a two- hole 5m x 3m stone arch culvert of an expressway (K17+125), this paper discusses the mechanism of the foundation bearing capacity improved by the dynamic compac tion crushed rock pile shuck method and the foundation settlement reduced by usi ng this method. It analyzes the stress shared by hard crushed rock shuck, crushe d rock piles and soil between piles. It introduces the calculation theory and co nstruction technology of this method.