【摘要】 通过上海地区 17项工程钢筋混凝土预制桩在不同休止期静载荷试验的统计分析 ,较深入地探讨了上海地区预制桩单桩竖向抗压极限承载力随时间增长规律 ,考虑土层条件、桩型等方面的影响 ,用迭代法计算推导出反映上海地区单桩竖向抗压极限承载力时间效应的数学表达式 ,并提出工程桩后期承载力的预测方法 ,实测结果表明该方法能较精确地预测单桩后期极限承载力 ,可在工程实践中参考使用更多还原

【Abstract】 The time effect on the bearing capacity of a prefabricated pile is studied in the paper.It is based on the statistical data of static pile tests in various sleep modes;the data is came from 17 terms of engineering project in Shanghai region.It is discussed in detail about the increasing rule of bearing capacity with time.A mathematical expression for the time effect on bearing capacity of the single pile is proposed;it is considered with the soil properties and pile shape.It is found that a method for the post construction bearing capacity of the pile is also proposed.The measured data are shown that the proposed method is feasible.更多还原