排桩支护结构反力计算方法

Counterforce Calculation Methods of Pile-row Retaining Structure

排桩支护结构的计算方法很多,一般有等值梁法、二分之一分担法、逐层开挖支撑(锚杆)支承力不变法、弹性法、有限元计算法等。主要介绍前三种计算方法的原理及步骤。为了对比三种方法计算结果之间的差异,以及与实际施工情况相符的程度,结合昆明市某城中村改造项目的具体工程实例,按照规范要求,给出了三种方法的具体计算过程和结果,分析了不同方法计算的反力大小差异很大的原因,对比得出逐层开挖锚杆支承力不变计算法,符合实际施工情况,是比较合适的计算方法。

There are many calculation methods of pile-row retaining structure,such as equivalent beam method,1/2 sharing method,delamination excavation supporting force method,elastic method,finite element calculation method and so on.The principles and steps of the first three calculation methods are mainly introduced.The different results between the three calculation methods and the level commensurate with the actual construction.Combining engineering instance of a town village renovation project in Kunming,the specific calculations and results in accordance with the regulatory requirements are listed.By comparing the differences between the three calculation methods,a conclusion can be draw that the best method of calculation is delamination excavation supporting force method,for it is the best way in line with the actual construction situation.