中文摘要：

以有效应力原理为基础,结合考虑应变软化、桩径和弹性区孔压分布等因素的桩周土固结解,推导出软土中单桩桩侧承载力时效性的理论解。与传统桩的承载力时效性简化分析方法不同,该理论解不仅考虑了多土层地基中各土层刚度指数的差异对固结过程的影响,还考虑了各土层因固结系数不同对孔压消散速率的影响。通过现场不同间歇期的单桩载荷试验测试结果验证了其合理性。

英文摘要：

Based on the theory of effective stress,consolidation solution around the pile which is taken into account the influence of strain softening,magnitude of pile radius and range of excess pore water pressure,a theoretical relationship about time-effect of bearing capacity of single pile is developed,which can be used to predict the variation of shaft bearing capacity of a jacked-in pile with time in saturated soft clay.Different from the traditional way,the effect of different stiffness indices and different consolidation coefficients on the consolidation process in varied clays and highly stratified deposits are considered in the new consolidation solution.Besides,the rationality of the solution is verified by the pile load tests in different time periods after installation.