【摘要】 以无限土体平面应变圆柱形小孔扩张理论为基础,结合Biot固结理论,采用修正的剑桥土体模型,对打桩过程及打桩后桩周土的再固结过程进行了有限元分析。并结合具体工程算例,对这两个过程中桩周土体的超孔隙水压力、不排水强度、土体应力状态以及桩周土体位移等作了一些定量讨论,其变化规律与实际情况相吻合更多还原

【Abstract】 Based on the theory of plain strain cylindrical cavity expansion in infinite soil and the theory of Biot consolidation, both the process of pile driven and the process of soil’s reconsolidation around the driven pile are discussed, in which Modified Cam Clay model is employed. In a case history, excessive pore pressure, undrained strength, streses state as well as displacement in the soil around the pile during and after its installation are analyzed quantitatively, the results are in agreement with practical observations. [更多还原