单线64 m简支系杆拱梁顶推转体技术-《高速铁路技术》

文章信息/Info

Title:: Pushing and Rotating Technology for Single-track 64 m Simply-supported Tied-arch Girder

Author(s):: DING Guang; WANG Xin; DING Feifan; China Railway Shenyang Bureau Group Co., Ltd., Shenyang 110001, China

Keywords:: railway|simply-supported tied-arch bridge|pushing|rotating|technology

摘要:: 受线路纵断面高度和桥下净空限制，新建铁路常采用简支拱梁方式跨越既有运营铁路。当现场地形地物不能满足简支拱梁原位浇注、大型吊车吊装架设、顺桥向顶推或拖拉等施工条件时，采用顶推转体方式，可解决施工场地狭窄问题，同时可减小对桥下既有铁路正常运营的影响。新通客专改京通右线大桥64 m简支系杆拱梁，采用顶推转体施工方法架设，有效减少了新建铁路桥梁施工与既有铁路运营间的相互干扰，大量缩减了跨越既有铁路线架梁施工的时间，同时避免了施工临时占地引起的工程投资增加，对今后同类工程建设具有较好的借鉴价值。

Abstract:: Due to the restrictions of the track profile height and the clearance under the bridge, the simply-supported arch girder is often used for newly-built railway crossing existing railway in operation. If the site terrain and surface features could not meet the requirements of such construction works as in-situ pouring of simply-supported arch girders, hoisting and erection with large crane, and pushing/dragging along the bridge, the pushing and rotating technology can be employed to solve the problem of narrow construction site and reduce the impact on the normal operation of the existing railway under the bridge. The 64 m simply-supported tied-arch girder for the modified Beijing-Tongliao Railway Right Track Bridge was erected using the pushing and rotating technology, which effectively reduced the interference between the construction of the new railway bridge and the operation of the existing railway, greatly shortened the construction period of girder erection for crossing the existing railway line, and avoided the increase in project investment caused by temporary land occupation for the project construction. This Project has good reference significance for the construction of similar projects in the future.