地铁车站施工对邻近管线影响的三维数值模拟

3D Numerical Simulation on Effect of Tunnel Construction on Adjacent Pipeline

随着城市建设步伐的加快,地铁工程施工对邻近管线的影响问题日趋突出.本文以北京地铁某车站工程为背景,借助大型有限元程序ABAQUS建立了三维隧道-管道-土体耦合模型,详细模拟了车站施工过程对邻近管线的影响.计算结果与现场量测数据基本吻合,验证了数值分析的可靠性.通过管道应力、局部倾斜、附加最大弯矩和地表沉降槽限值的验算,对管线的安全性进行了评估.

With the development of the construction of the cities, the problems of buried pipelines induced by tunneling are becoming increasingly serious. Considering the practical problem of a station of Beijing metro, this paper addresses the approach for formulating 3-D elastic-plastic ABAQUS FEM models, which can efficiently simulate the effect of the metro tunneling on the adjacent pipeline. The analysis results are consistent with field measuring data, which proved its credibility. Through the checking calculation of the maximum pipelines stress, additional maximum bending moment and surface settlement trough width parameter, the safety of the pipe line is evaluated.