南京地铁车站下穿既有铁路站场施工技术研究

南京地铁一号线南京地铁车站是国内首次在既有铁路站场下采用矿山法施工的地铁车站,受地表铁路站场制约,南京地铁车站分为南、北 2 个明挖区和中间部分的过站区。过站区采用双线隧道型式,隧道跨度大,埋深浅,线间距小。工程最大难点在于隧道下穿既有铁路站场的施工期间不能影响地表铁路站场的正常运营,因此施工难度和风险极大。阐述了地铁车站隧道施工前对上方既有铁路线路所采用的加固措施、加固方案安全性评价以及过站区隧道施工方法。

A STUDY OF CONSTRUCTION TECHNIQUE FOR THE NANJING SUBWAY STATION UNDER THE NANJING RAILWAY STATION

The Nanjing subway station of Nanjing metro No.1 is the first subway station under the railway station in China,which is constructed with mining method. Constrained by the railway construction field,the Nanjing subway station is subdivided into three parts:(1) the southern cutting part,(2) the northern cutting part,and (3) the connecting part. The connecting tunnels constructed with mining method have a large span,a shallow coverage, and a little distance between two lines. In this paper,the connecting tunnels construction method and the railway reinforcement method are discussed.