基于上海软土特性的单桩Q-S曲线反分析  

Research on Back-Analysis of Single Pile's Curve on the Basis of Soft Soil in Shanghai

作　　者：宋和平[1] 李培振[1] 

机构地区：[1]同济大学土木工程防灾国家重点试验室,上海200092

出　　处：《结构工程师》2007年第5期58-61,65,共5页Structural Engineers

摘　　要：利用压桩试验所得的Q-S曲线,反推沿桩身分布各层土的力学指标。其步骤是:首先利用所选定的沉降计算方法,确定与指定沉降相应的荷载对各层土力学参数变化的敏感性。然后,利用此敏感性的分布特征,调整各层土力学参数,以拟合所选Q-S曲线的位移-荷载关系。如此反复迭代,直至由所得的各层土的力学参数计算的沉降曲线达到拟合实际Q-S曲线的精度为止。The purpose of this paper was to deduce the mechanic parameters of soil around pile by fitting Q-S curve from loading test. First, a method of settlement analysis for single pile was selected, and the sensibility of load under specified settlement to variation of the parameters of soil was determined with the selected method. Then , based on the determined sensibility , the parameters of soil were modified in order to fit the Q-S curve. Finally, the required accuracy of fitting was satisfied with iteration.

关 键 词：单桩 非线性 Q-S曲线 反分析 

分 类 号：TU43[建筑科学—岩土工程]