基坑明挖施工对正上方既有轻轨车站扰动分析

Analysis on Disturbance of Open-cut Foundation Pit to Elevated Station of Light Rail

在既有轻轨高架车站下进行基坑开挖,势必对轻轨车站上部结构特别是柱基产生扰动,而目前国内已有的规范和标准中还未有对此施工控制标准的规定。针对上海市轨道交通9号线某车站换乘通道工程实例,结合对车站柱基变形的数值分析结果与现场监测数据,提出了轻轨高架车站柱基变形控制指标,可为同类型的基坑工程提供有益的参考。

The open-cut foundation pit just under the operating elevated station of light railway must has influence to upper structure,especially to column foundation of the station,however,there are not disturbance control standards for this kind of construction in the present codes.The paper aims at a transfer channel engineering project of Shanghai Metro Line 9, combining the deformation simulating results of column foundations of the station with field monitoring data,proposes the disturbance control standards for column foundation of light railway station.It provides beneficial references for other foundation pits in same situation.