武广客运专线罗水大桥施工控制

罗水大桥位于武广铁路客运专线上,跨越罗水河的主桥为跨径(48+80+48)m的三跨预应力混凝土连续梁桥,桥上铺设无碴轨道,设计速度350 km/h,主梁采用分段悬臂法施工。由于无碴轨道扣件调节量有限,相比于普通连续梁桥,高速铁路无碴轨道大跨度连续梁桥对成桥线形控制更为严格。为了使该桥的成桥线形达到设计要求,利用桥梁博士有限元软件模拟施工过程,根据桥梁变形和受力情况预测施工预拱度,监测施工过程和成桥状态下的桥梁线形和受力状态。控制结果表明,施工过程中和成桥状态下,桥梁线形顺畅,合龙口主梁高程误差小于10 mm,主梁受力状况良好,达到监控目标。

Construction Control of Luoshui Bridge on Wuhan Guangzhou Passenger Dedicated Railway

The Luoshui Bridge is located on Wuhan-Guangzhou Passenger Dedicated Railway.The main bridge of the bridge over the Luoshui River is a 3-span prestressed concrete continuous girder bridge with span arrangement(48+80+48) m and the main girder is constructed by the cantilever segmental concreting method.On the deck of the bridge,the ballastless tracks are laid and the designed traveling speed is 350 km/h.Owing to the restricted adjustment capacity of the fasteners for the ballastless tracks,the alignment cont...