顶升技术在铁路既有上跨结构净空改造中的应用

Application of Jacking-up Technique to Headroom Improvement of Existing Structures over Railway

不少上跨既有铁路结构与铁路间的净空不能满足铁路电气化改造的需要,尤其不能满足开行双层集装箱列车所需的净空要求,必须对上跨结构的净空进行改造。在介绍国内既有结构物净空改造技术的基础上,重点介绍顶升改造技术的特点、施工方法及其在上跨铁路结构物净空改造中的应用。

The headroom between many existing structures spanning railway and the railway lines below can not cater for the need of railway electrification retrofitting, particularly the need of operation of double-deck container trains, and the headroom of the structures must be improved. On the basis of the introduction of the domestic techniques for headroom improvement of the existing structures, this paper mainly presents the features of the jacking-up technique, construction methods and application of the technique to the headroom improvement of the structures spanning railway.