考虑时间效应的预制桩单桩极限承载力解析解  

Analytical solution for time-dependent ultimate bearing capacity of single driving pile

作　　者：王伟[1] 宰金珉[1] 王旭东[1] 

机构地区：[1]南京工业大学土木工程学院

出　　处：《南京工业大学学报（自然科学版）》2003年第5期13-16,共4页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金(50279021);江苏省应用基础基金(BJ97051)

摘　　要：从饱和软土中沉入预制桩单桩引起的三维超静孔隙水压力的消散和桩周土的固结出发,结合桩土接触面的破坏形式,获得了考虑时间效应的单桩极限承载力的解析解,实现了对任意时刻单桩极限承载力的预测。分析了土体参数的变化对单桩极限承载力的影响,结果表明:桩的最终极限承载力增量随摩擦角的增大而增大;固结系数决定着桩的极限承载力在初期的发挥,但并不影响桩的最终极限承载力。计算结果与工程实际测量吻合较好。Based on dissipation of 3D super static pore water pressure resulted from driving pile in satulated soft clay, consolidation of the clay around the pile and failure pattern of pilesoil interface, an analytical formula to predict timedepended ultimate bearing capacity of the driving pile was obtained.The effects of soil friction angle and coefficient of consolidation on pile ultimate bearing capacity were both analysed. Results of the presented analytical formula were found to be in good agreement with measured data.

关 键 词：时间效应 预制桩 极限承载力 解析解 饱和软土 固结 摩擦角 

分 类 号：TU473.1[建筑科学—结构工程]