混凝土芯水泥土搅拌桩在基坑支护中的应用

Application of concrete-cored deep cement mixing piles to foundation pit supporting

介绍了一种新型的桩形———混凝土芯水泥搅拌桩支护基坑的方法.以南京大学港龙园高层公寓为例,根据其基坑支护影响范围内土层情况,采用门型混凝土芯水泥土搅拌桩进行深基坑支护,给出了门型混凝土芯水泥土搅拌桩的主动土压力、被动土压力、支撑轴力、弯矩以及支护桩长的计算方法,为以后的基坑支护应用提供设计方法.

A new support system, named concrete-cored deep cement mixing （DCM） pile, for deep foundation pit supporting was introduced. The gate-shaped pile was applied to deep foundation pit supporting in a high-rise building project of Nanjing University. The active earth pressure, passive earth pressure, axial forces, and bending moments of piles were analyzed, and the calculation method for determination of pile length was given. The study provides a design method for deep foundation pit supporting.