纵挑横抬梁加固线路在框构桥顶进施工中的应用

Application of the Longitudinally-Suspended and Horizontally-Raised Beam Track-Reinforcing Construction Method in the Jacking construction of Frame Bridge

在框构桥顶进施工中,采用钢轨束作为纵、横梁加固线路施工比较繁琐,采用D型便梁加固线路受立交跨度和斜交角度的限制适应性较差。文章介绍使用I56c工字钢拼装成纵挑横抬梁来承受线路荷载,不但施工方法变得简单,还确保了既有线的行车安全和框构桥顶进的施工安全,成功的经验可为同类工程参考。

In the jack construction of the frame bridge, it is more complicated to use the rail beam as the longitudinal and transverse beam to reinforce the line. The adaptability of the D-shaped beam reinforced line is limited because of the intersection span and the oblique angle. This paper introduces the use of I56 c I-steel to carry longitudinal beam to bear line load. Not only is the construction method simpler, but also ensures the safety of the existing railway and the safety of the construction of the frame bridge. The successful experience can be used as reference for the same kind of project.