安庆铁路长江大桥设计

Design of Anqing Changjiang River Railway Bridge

安庆铁路长江大桥是宁安城际铁路与阜景铁路共同跨越长江的通道,大桥全长2 996.8 m,主桥跨度布置为(101.5+188.5+580+217.5+159.5+116)m,为六跨连续钢桁梁斜拉桥。主梁采用3片主桁构造,桁高15 m,节间距14.5 m,桥面为正交异性板钢桥面。桥塔高210m,桥塔基础采用37根3.0 m钻孔摩擦桩基础,桩长分别为108 m1、13 m。斜拉索采用平行钢丝索,空间三索面扇形布置。主梁采用双悬臂安装、跨中合龙。静、动力计算分析表明大桥具有较高的刚度和良好的列车走行性。

Anqing Changjiang River Railway Bridge will serve as a crossing for both the Nanjing-Anqing Intercity Railway and Fuyang-Jingdezhen Railway over the Changjiang River. The total length of the Bridge is 2 996.8 m and the main bridge is a six-span continuous steel truss girder cable-stayed bridge with span arrangement （101.5＋188.5＋580＋217.5＋159.5＋116） m. The main girder for the main bridge is composed of three main trusses that are 15 m in height and 14.5 m in panel length. The deck is to be provided with the orthotropic steel plates. A pylon of the bridge is 210 m high, resting on the frictional pile foundation made up of 37 numbers of 43.0 m bored piles, respectively 108 m or 113 m in length. The stay cables are of parallel steel wire strands, which are to be arranged in three spatial cable planes in fan shape. The main girder will be erected by the double cantilever method and will be closed in midspan. The calculation and analysis of the static and dynamic load indicate that the designed bridge has good rigidity and favorable train running property.