关于钢桁梁跨既有线顶推施工技术的探讨

DISCUSSION ON CONSTRUCTION TECHNOLOGY OF STEEL TRUSS BEAM SPAN

跨既有线路桥梁施工相较于普通桥梁工程而言,施工场地相对有限,工期较紧,同时需要考虑既有线路的运营需求,这就导致桥梁安装施工活动受到较大限制,并且面临较大安全防护压力。而顶推施工技术适用于作业面较小、施工场地有限以及地形条件较为复杂的钢结构桥梁安装施工,可以有效规避不良因素的影响,因此在跨既有线路桥梁钢桁梁安装施工中,适宜采用顶推施工技术。本文结合具体的工程案例,研究钢桁梁跨既有线路顶推施工技术。

Compared with the ordinary bridge project, the construction site is relatively limited, and the construction period is relatively tight. At the same time, the operation needs of the existing lines need to be considered, which leads to the bridge installation and construction activities are greatly limited, and faces greater safety protection pressure. The jacking construction technology is suitable for the installation of steel structure bridge with small working surface, limited construction site and complex terrain conditions, which can effectively avoid the influence of adverse factors. Therefore, the jacking construction technology is suitable for the installation of steel truss beams across existing lines. Combined with specific engineering cases, the paper studies the construction technology of steel truss beam across existing lines.