下承式网状系杆拱桥钢拱肋安装施工

Installation and construction of steel arch rib of through type network tied arch bridge

为建设下承式网状系杆拱桥,执行下承式网状系杆拱桥钢拱肋安装施工。明确下承式网状系杆拱桥总体布置,设定下承式网状系杆拱桥钢拱肋基本参数,分析施工思路,通过搭设支栈桥及水上施工平台,拼装、顶推钢拱肋,采用三段法安装中跨420 m钢拱肋,提升安装中段拱肋,实现下承式网状系杆拱桥钢拱肋安装施工。