水平荷载下群桩P－Y曲线的试验研究

Experimental Investigation on P-Y Curves of pile Groups under Lateral Load

本文在调查研究的基础上分析了水平荷载下群桩的工作性状，通过模型试验，对单向常规循环、多循环荷载变位规律，双桩的Ｐ－Ｙ曲线进行试验分析，提出了把排桩中“后桩”修正为单桩计算的土反力折减系数公式等，并得到验证。

Close attention is paid to in civil engineering that the behaviors and calculation methods of pile groups. Based on investigation and model tests, this paper is combined with the study of pile groups under lateral load. The variation law of one-way routine circulation as well as many circulations and load-deflection (P-Y) curves for double piles under lateral load been studied by scale-down test. A revised formula on P-Y curves of individual pile in pile groups is put forward. and so on. All these results are vestified by some engineering practice. The defect of current calculation methods in code are corrected.