碎石桩复合地基承载力计算方法探讨

振冲碎石桩是处理软弱地基地一种有效方法。对碎石桩的加固机理及破坏形式进行了简要论述,对碎石桩复合地基承载力计算的几种常用方法进行了对比分析。荷载作用下碎石桩桩体绝大多数发生鼓胀破坏,碎石桩单桩承裁力fpk的计算可采用Braus法进行计算;复合地基承载力宜直接采用单桩承裁力和桩间土承载力按面积置换率进行叠加来确定。最后通过算例验证了所推荐的计算方法。

Discuss on the Calculation Method of Bearing Capacity of Stone Column Composite Ground

The vibro-replacement stone column is a kind of effective method for soft ground improvement. The strengthening mechanism and damage form for stone column are discussed briefly , some kinds of the calculation method of bearing capacity of stone column composite ground are analyzed at the same time. In view of the fact that stone column often occur swelling destroy, the bearing capacity of single stone column can be calculated by Braus method; the bearing capacity of stone column composite ground should be determined by superposition method according to area displacement rate direct adopting the bearing capacity of single stone column and the bearing capacity of soils surrounding pile.The recommending calculation method is verified with project example.