高架快速路上跨宝鸡东编组站方案比选

Scheme Comparison of Elevated Expressway Crossing Over Baoji East Marshalling Station

宝鸡市斗中路高架快速路,跨越宝鸡东编组站的10股轨道线和铁路专用线,同时桥下的城市主干路以框架桥的形式下穿宝鸡东编组站。桥位处需保留现状的地面交通、铁路框架桥和周围的高层建筑,桥址处空间局促,建设条件复杂,导致桥梁墩位布置困难。桥梁的布置方案与施工方案相互影响和制约。上跨方案是控制整条快速路的关键节点。综合考虑主墩的合理位置、恰当的孔跨布置和适宜的施工方案,对矮塔斜拉桥、刚构桥等方案进行详细的对比分析,确定采用(97+97)m的转体刚构桥方案。该方案的安全性和经济性均较优。该桥方案的研究过程和方法,为类似的复杂城市环境下,建设高架桥梁跨越铁路编组站提供参考和借鉴。

The elevated expressway of Douzhong Road in Baoji crosses over 10 strands of tracks and special railway lines of Baoji East Marshalling Station,and the urban main road under the bridge passes through Baoji East Marshalling Station in the form of a frame bridge.The existing ground transportation,railway frame bridge and the surrounding high-rise buildings should be retained.The arrangement space of the bridge is narrow and the construction condition is complex,which increases difficulties of pier layout.The layout plan and construction plan of the bridge affect and restrict each other.The scheme is to control the key node of the whole expressway.Considering reasonable location of the main pier,proper hole span arrangement and suitable construction plan,the paper made a detailed comparative analysis of the short-pylon cable-stayed bridge,rigid frame bridge and other schemes,and decided to adopt the scheme of swivel rigid frame bridge with span arrangement of(97+97)m.The scheme has better security and economy.The research process and method employed may provide references for the design of similar projects in a complex urban situation.