深基坑开挖对近邻大直径管线的影响分析

基坑开挖会引起土体的扰动从而带动近邻管线的位移，甚至会引起管线的开裂破坏。本文以实例工程为背景，运用有限元软件PLAXIS模拟基坑开挖引起大直径管线位移的变化，得出基坑开挖深度与埋设污水管线深度之间存在三种不同的位置关系，并且分析基坑开挖引起管线水平和竖向位移之间的差异变化，基坑开挖引起管线水平位移的增长速率为0.57mm/m，竖向位移增长速率为0.73mm/m，文中得到的结论和建议可为相似工程提供参考。

Analysis on Influence of Deep Foundation Pit Excavation on the Adjacent Large-diameter Pipeline

Excavation of foundation pit will cause soil disturbance and the displacement of adjacent pipeline. It can even cause pipeline crack and damage. According to some engineering in this paper, finite element software was used to simulate the variation of pipeline displacement with the excavation of foundation pit. There are three different relationships between the excavation depth of foundation pit and the buried depth of pipeline. The difference between horizontal and vertical displacement of pipeline is analyzed by excavation of foundation pit. The growth rate about horizontal displacement of the pipeline is 0.57 mm/m, and the vertical displacement is increasing at a rate of 0.73 mm/m. The conclusions and suggestions obtained from this paper are used as references for the similar engineering.