顶推施工在上跨铁路线中的应用

Pushing Construction Application of Above Crossing Railway Line

在上跨既有铁路线施工时,对施工的安全性要求高,同时还要求对铁路运营影响最小。在上跨京哈铁路立交桥施工中,采用顶推法施工,并取得了成功。跨既有铁路线时顶推法施工便于操作,优点明显。重点介绍跨线顶推箱梁段施工平台布置,钢导梁的安装与连接,支承通长滑道,牵引装置,工艺流程,顶推操作,起落梁等。

During the construction of above crossing existing railway lines,high security requirements are needed,as well as the least impact on railway operation.In cross-Beijing-Harbin railway overpass construction,pushing construction technology is applied,which is easy to operate for crossing existing railway lines.The construction platform setting for incremental launching box girder segments,installation and connection of steel guide beams are introduced in detail,as well as slideway support,traction devices,construction process,incremental launching operation,and hoisting and falling beams.