围滩吹填工程地下既有管线变形计算浅析——以江苏常熟边滩整治工程为例

Discussion on deformation calculation of pre-existed underground pipeline in embankment and hydraulic fill construction:a case study of tidal reclamation project in Changshu City,Jiangsu Province

为准确计算大面积吹填工程对软土地基既有管线造成的变形影响,结合江苏常熟边滩整治工程实例,分别采用工程规范法、有限单元法等几种常用方法对管线的变形进行了计算。通过对比分析各方法的计算结果,并参考以往实际管线工程的变形情况后认为,一般理论公式法计算结果偏大,有限单元法计算结果基本符合实际。同时,通过进一步分析计算,得出了类似工程可根据管线埋深和管线上部大面积堆载的高度,初步判断管线基础是否需要采取处理措施的简单方法。

For accurately evaluating the construction of large scale embankment and hydraulic fill construction on deformation of pre -existed underground pipeline, several calculating methods such as engineering specification method, FEM and so on are applied to calculate the pipeline deformation in a tidal reclamation project in Changshu City. By comparing the calculating results and referring to previous practical deformation conditions, it is concluded that the theoretical formula methods often obtain larger values and FEM provides more accurate deformation values. A simplified judging method that is to help making decision whether or not taking reinforcing measures for the underground pipeline is proposed, in which the main judging parameters are pipeline huffed depth and height of filling load.