水平力作用下群桩性状的研究

Study on Behavior of Pile Groups under Lateral Load

本文在调查研究和模型试验的基础上,结合固定式海上平台规范中在水平力作用下群桩的研究课题,对群桩的工作性状与破坏机理,产生群桩效应的临界桩距,群桩的水平承载力及其主要影响因素,单桩与群桩情况下应力应变关系等方面进行了全面深入的研究。对群桩在水平力作用用方向(纵向)各桩受力分配的不均匀性及群桩情况下桩的p-y曲线的分析中发现了一些新的规律,并提出了经验公式和建议,以弥补目前国内外现行计算方法的缺陷和不足。研究成果可供在水平力作用下的桩基工程设计时参考。

Based on investigations and model tests, and in combination with the research work on group effect for pile groups under lateral load relating to the code of fixed offshore platform, A series of studies ware performed oa behavior aad failure mechanism of laterally loaded pile groups, critical pile spacing on group effect, lateral bearing capacity of pile groups and its main influence factors, the stress-strain relationship for single pile and pile groups and so on. Some new laws about non-uniformity of load distribution ia the longitudinal direction of pile group and load-deflection (p-y) curves for pile groups were discovered, and the empirical formula was presented in order to remedy the defect of current calculating methods at home and abroad. These results can be provided as a reference for design of pile foundation under lateral load.