天津市中心城区快速路南仓道立交桥总体设计

南仓道立交桥跨越铁路南仓编组站、铁路京山线和在建的京津城际铁路等重要国家铁路干线，受规划及建设条件限制，主桥采用联塔分幅独塔4索面预应力混凝土斜拉桥，引桥采用预应力混凝土连续梁。着重介绍跨越铁路部分桥梁的方案和结构设计特点。

Overall Design of Nancangdao Interchange on Rapid Road Through Downtown in Tianjin City

The Nancangdao Interchange spans several important national arterial railway lines like the Nancang Marshalling Station, Beijing-Shanhaiguan Railway and Beijing-Tainjin Intercity Railway that is now under construction. Restricted by the planning and construction conditions, the main bridge of the Interchange is designed as a single pylon and four cable plane prestressed concrete cable-stayed bridge that features a joint pylon and separated girders, while the approach bridges are designed as the prestressed concrete continuous girders. In this paper, the conceptual design and structural design features of the part of the Interchange spanning the railway lines are mainly presented.