小直径钻孔灌注桩作用机理研究

STUDY OF MECHANISM OF SMALL DIAMETER FILLING PILE

本文叙述了小直径钻孔灌注桩的一般特性、分析了日前设计计算中存在的问题,通过埋设测量元件的小直径钻孔灌注桩的现场静载荷试验,探讨了竖向受荷时的桩荷载传递机制及刚性载荷板下的桩、上荷载分担情况。结果表明,桩侧摩阻力远大于桩端阻力。

This paper describes briefly the general features of the small diameter filling pile and analyzes theproblems existing now in design and caluclation. The mechanism of load transfer in the pile-soil systemis discussed based on the field load testings of the small diameter filling pile with the measure cells andthe sharing loads by the pile and soil under the rigid loading plate are analyzed. Analyses show thatthe frictional resistance is much more than the tip resistanlc and the ratio of the sharing load by pileand soil varies with the applied load.