提高钻孔灌注桩承载力措施的研究

Research on the Process of Enhancing Baring Capacity of Boredpiles

针对钻孔灌注桩的特点 ,归纳和总结出提高钻孔灌注桩承载力的工艺措施有预加载法、扩大端承面积和桩端注浆法。结合工程实际 ,指出桩底后压浆补强技术可用于解决传统钻孔灌注桩桩底有虚土、桩头产生过量沉降问题 ,作为提高钻孔灌注桩承载力的有效措施。

In light of the characteristics of bored piles, the processes of improving the bearing capacity of boredpiles are summarized in this paper. The results of piles' tests in situ show that piles' performance are improved by toe pressuregrouting, this paper illustrates that the toe pressure postgrouting can be used both as a routing construction method, and as a reliable remedial measure.