考虑时间效应的复合桩基简化分析方法  

Simplified analysis of composite pile foundation considering time effect

作　　者：徐美娟[1] 梅国雄[2] 宰金珉[2] 

机构地区：[1]南京交通职业技术学院,江苏南京211188 [2]南京工业大学土木工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2006年第5期11-16,共6页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：霍英东青年教师基金(91076);中国人事部留学归国人员基金;江苏省高校自然科学研究计划项目(04KJB560048)

摘　　要：基于复合桩基的基本理论,结合刚性基础的计算方法,建立了考虑时间效应的桩-土-刚性承台体系共同作用的基本方程,编制相应程序进行计算,分析了单桩、四桩和九桩3种具有代表性的桩-土-承台体系沉降与反力随时间的变化特征:在整个加载过程中,单桩、四桩、九桩承台的沉降随时间对数的变化曲线均呈“S”形;加桩承台的荷载-沉降曲线表现明显的非线性,刚性基础加桩以后“架越作用”减小。Based on the composite pile foundation theory ,emphasis was put on studying the composite pile foundation considering time effect, and the calculation and analysis were done with relevant program. The working mechanism of three representative pile-soil interaction systems was studied, which consists of settlement and contact pressure. During loading, the S - lgt curves show ＂S＂ shape. Q - S curves of pile with raft are nonlinear. The load supported by the pile in the rigid foundation is less.

关 键 词：时间效应 复合桩基 沉降预测 变形 反力 

分 类 号：TU443[建筑科学—岩土工程]