【摘要】 以兰州地铁1号线某车站基坑支护工程为背景,对该车站基坑开挖降水过程中地下管道的位移进行了全面的分析。采用排桩加内撑支护结构对基坑进行支护,考虑了深基坑降水贯穿基坑开挖的全过程,借助有限元软件ADINA建立地铁车站基坑三维有限元分析模型。通过有限元法分析以及实际监测数据,表明车站深基坑开挖及降水对地下管道的位移有显著影响,进而总结了管道的变形规律,为兰州地区地铁车站及类似深基坑设计和施工提供重要的依据。更多还原

【Abstract】 Taking the deep foundation pit at a subway station of Lanzhou metro line 1 as an example, the displacement of the underground pipes induced by its dewatering is comprehensively analyzed. Using piles and internal bracing structures to support the deep foundation pit and considering dewatering during the whole excavation process, a three-dimensional finite element model is established by using the FEM software ADINA. The FEM analysis and monitoring data show that the deep excavation and dewatering have significant effects on the displacement of underground pipelines. Accordingly the deformation of the pipelines is summarized, so as to provide an important basis for the design and construction of Lanzhou subway stations and similar deep foundation pits.更多还原