大范围邻接运营地铁车站基坑设计与保护研究

Research on Foundation Pit Design and Protection of Large-scale Adjacent to Operating Subway Station

随着地铁建设规模的增大,新建地铁基坑邻接既有运营车站的工程越来越多。而运营车站变形控制要求高,选择一个合适的工法对控制变形和提高施工效率至关重要。文章结合南京地铁4号线鼓楼站的工程实践,通过数值计算详细分析了明挖临接范围及盖挖逆作范围大小对既有线的变形影响规律,并据此分析了施工工法选择的过程及具体的保护措施,最后通过监测数据分析了既有1号线鼓楼站的轨道、轨距、侧墙监测数据等保护效果,为类似工程提供参考。

With the increas in the scale of subway construction,more and more new subway base pit is adjacent to existing operating stations.The high-deformed control requirements for operating stations,choosing a suitable method is essential for controlling deformation and improving construction efficiency.This article combines the engineering practice of the Gulou Station of Nanjing Metro Line 4,analyzes the explicitly digging scope and the size of the building in the universal line through numerical calculations.Specific protection measures,finally analyzed the protection effects such as the track,orbit distance,side wall monitoring data of Line 1 of the Gulou Station of Line 1,and provided a reference for similar projects.