特大桥箱梁上跨运营铁路施工分析

Analysis of the Construction of Super Large Bridge Box Girder Crossing over Operating Railway

为探讨特大桥箱梁上跨运营铁路施工要点,结合G8513平凉至绵阳高速工程,对其具体应用要点进行了分析。分析表明,特大桥箱梁上跨运营铁路施工难度较大,技术标准要求高,在具体施工中,需要科学合理地做好施工前的准备工作,并结合现场实际条件,采用预制拼装组合新型门式墩施工,控制好施工步骤和施工时间,在不影响既有线路安全运行的情况下,保证特大桥箱梁施工各道工序能够高效、安全、有序地完成。

In order to discuss the key points of the construction of the super large bridge box girder crossing over operating railway,combined with the the project of G8513 Pingliang-Mianyang Expressway,the specific application points are analyzed.The analysis shows that the construction of the super large bridge box girder crossing over operating railway is relatively difficult and the technical standards are high.In the specific construction,scientific and reasonable preparations shall be made before the construction,and combined with the actual conditions of the site,the prefabricated and assembled new portal pier construction shall be adopted;the construction steps and construction time shall be controlled to ensure the efficient,safe and orderly completion of each process of box girder construction of super large bridge without affecting the safe operation of existing lines.