1981年郑州铁路局直属桥隧段成功地研制了用于架空线路的100型工字钢梁(Ⅰ_(100)。该梁作为临时性架空线路结构以其使用方便、快速、架空线路稳固等显著优势被广泛应用于既有线路行车状态下的桥梁大修改造、框架立交桥顶进等工程。该梁一般用作跨度L≤15m的简支架空结构,但近年来随着大跨度连续框架立交桥的大量出现,15m的架空跨度已不能满足施工需要。我们又逐步总结出了一套用该梁拼成连续梁架空线路的新方法,使其架空能力有了更大提高。目前我们又将计算机应用于连续架空线路的工程设计中,大大提高了设计速度和设计精度,现介绍如下 The Type I 100 beam (Ⅰ_ (100)) used for overhead lines was successfully developed in 1981 in the section of the bridge and tunnel directly under the Zhengzhou Railway Administration. As a temporary overhead line structure, the beam is notable for its ease of use, rapidness and stability of overhead lines Advantages are widely used in existing state of the road line bridge overhaul transformation, frame overpass jacking and other projects. The beam is generally used for span L ≤ 15m simply supported overhead structures, but in recent years with large span continuous frame overpass a large number of Appeared, 15m overhead span can no longer meet the needs of construction.We also gradually summed up a new method of using the beam to form a continuous beam overhead lines, so that its overhead ability has been greatly improved.Now we are in the computer application for continuous Overhead lines of the engineering design, greatly improving the design speed and design accuracy, are introduced below