长、短桩相结合的水泥粉喷桩复合地基设计计算方法探讨

A DESIGN METHOD FOR DJM PILE COMPOSITE GROUND COMBINED WITH BOTH LONG AND SHORT PILES

对长、短桩相结合的水泥粉喷桩复合地基设计计算方法进行了探讨 ,提出了水泥粉喷桩复合地基承载力计算公式、作用在下卧层桩间土层顶面附加应力的计算公式以及复合地基沉降的计算公式 ,指出单桩竖向承载力标准值Rkd 计算必须考虑粉喷桩的有效桩长问题。给出了一个用长。

A design method for DJM pile composite ground combined with both long and short piles is studied.The formula of bearing capacity for DJM pile composite ground,the additional stress acting on substrata,and the settlement of DJM pile composed ground are proposed in the paper.It is clear that the effective length of a pile has to be considered to calculate the bearing capacity.A practical project of deep soft ground treatment combined with both long and short DJM piles is presented.It is found that the proposed method is feasible.