张涿高速公路卧佛寺连接线永定河大桥方案研究

目前国内公路上跨铁路桥的方案主要包括预制架设、悬臂浇筑、顶推、转体施工等方案,随着铁路运输的日益繁忙,桥梁设计方案,应尽量减少对铁路运营的干扰,降低公路桥梁施工方案对铁路运营安全的风险。张涿高速公路卧佛寺连接线永定河大桥经过多方案的比较研究提出了墩中转体的刚构连续梁方案,降低了工程风险,缩短了施工工期。

Schematic Study of Yongding River Bridge on the Connecting Line from Zhangjiakou-Zhuozhou Expressway to Buddha Temple

At present,the erection schemes for any highway bridge crossing above railway mainly include the precast erection method,cast-in-situ cantilever method,incremental launching method,the swing method and so on. However,because railway transportation is becoming busier and busier,the erection scheme of a highway bridge crossing above railway should be carefully planned in order that the interference and the risk in railway operation can be minimized as much as possible when erecting the highway bridge. For the Yongding River Bridge on the connecting line from Zhangjiakou-Zhuozhou Expressway to Buddha Temple,by means of comparative study on multiple schemes,a good scheme of erecting a rigid-frame continuous girder by swing method at the middle part of pier were put forward with which the project risk has been reduced and the construction period has been shortened.