Abstract: This paper presents the research on the behavior of laterally loaded pile group in cohesive soil through model tests and the results are analysed by means of non-dimensional contrast of p-y curves. It shows that the front pile in a row pile may be treated as single pile and the group effect to the rear pile is considered with the reduction coefficient, η. The main factors affecting η,such as pile spacing, depth and loads are thoroughly analyzed in this paper and a formula is proposed. By comparison with data obtained from a site-test, the calculations satisfy the measure-ments. A reference to design on pile foundation concerned is recommended.

Key words: group piles, laterally load, p-y curve

摘要： 本文通过模型试验研究粘土中横向受荷群桩的性状,以无量纲对比法分析了各校的p-y曲线特性。结果表明,排桩中的前桩可按单桩考虑,后列桩可由折减系数η考虑群桩效应。文中主要分析了桩距、深度、荷载对η的影响,并给出了经验公式。经与原型试验结果验证,二者较为吻合。可供桩基设计时参考使用。

关键词: 群桩, 横向荷载, P-Y曲线