大花水水电站厂房上部钢—混凝土柱结构施工技术综述

Summary of Construction Technology for Structure of Steel-concrete Column on Upper Part of Powerhouse of Dahuashui Hydropower Station

大花水水电站主厂房上部采用新型焊接箱型钢—混凝土排架柱结构,屋顶采用下弦柱点支撑、螺栓球节点正放四角锥网架结构形式,其工程量大、结构复杂、现场安装难度高、施工工期极紧张。为此,采取了对高达20.7 m的构架柱整柱吊装、对柱内混凝土一次回填完成的施工措施,这不仅节约了施工工期,还取得了一定的经济效益,并为类似工程的施工提供了一定的实践经验。

New welding box-shape-steel-concrete-bay structure is used as upper part of powerhouse of Dahuashui Hydropower Station, and bottom chord beard by point, quadrangular taper grid with bolt-ball-node structure as its roof, the structure of powerhouse is very complex, its construction schedule, therefore, is pressing. Some measures were adopted such as that the column with length of 20.7m was wholly erecting by overhang, concrete was putting into column until full. Those measures can shorten construction time, cut down cost, and be as reference for other similar projects.