长沙书院路下穿京广线框架桥顶进施工技术

Construction Technology for the Jacking of Frame Bridge on Changsha Shuyuanlu Road under Beijing Guangzhou Line

既有线路的加固和顶进后背系统的稳定性、安全性是大框架顶进施工的关键。结合长沙市书院路下穿京广铁路上、下行线框架桥的顶进施工,介绍了施工中既有线路加固体系、框架顶进后背体系、支点转换体系以及关键部位检算的方法。

Abstract The existing line reinforcement and the stability, security of the pushing back system are the keys to the jacking construction of large framework. Combined with the jacking construction of the frame bridge of Changsha Shuyuanlu Road undercrossing Beijing-Guangzhou Railway, the paper introduces the reinforcement of the existing railway system, framework jacking back system, pivot conversion system and key parts inspection.