柔性桩复合地基有效桩长的简化计算方法

The simplified calculating method of effective length of the flexible pile in the compound foundation

在进行柔性桩复合地基承载力计算中,如何确定复合地基的有效桩长,一直是工程实践中极为关注的问题。本文在分析柔性桩桩顶沉降和桩侧变形的基础上,根据桩土之间的位移协调原理,推导出了柔性桩复合地基有效桩长的简化计算方法。按照工程实例提出的设计长度及不同分析方法的计算,得到了较为一致的结果。

It is a remarkable problem in the engineering practice to determine the economic length of the pile in the calculation of the capacity of compound foundation. Based upon the analysis of the settlement on the top of the pile and the deformation on the sides, a simplified calculating method of effective length of the flexible pile in the compound foundation was deduced according to the displacement coordination between pile and soil. It was indicated that the result obtained from the method was consistent with the out-come got from the different analysis and the designing length of the pile in a project example.