大型场馆超长无缝结构预应力后张法施工技术  

Construction Technology of Prestressed Post-tensioned Method for Super-long Seamless Structure of Large Stadium

作　　者：左廷忠 蒋丰 陈波[1] 杭宏飞 吴传勇[1] ZUO Tingzhong;JIANG Feng;CHEN Bo;HANG Hongfei;WU Chuanyong(Southwest Co.of China Construction Eighth Engineering Bureau Ltd.,Chengdu,Sichuan 610016,China)

机构地区：[1]中国建筑第八工程局有限公司西南公司,四川成都610016

出　　处：《施工技术》2020年第S01期405-407,共3页Construction Technology

摘　　要：为控制大跨超长混凝土结构的裂缝和挠度,并减轻混凝土收缩和温度变化对混凝土梁板的不利影响,以凤凰山体育中心足球场为载体,详细介绍了超长无缝结构预应力后张法施工技术,通过预应力钢绞线准确下料,水平及竖向精密定位,以及对混凝土中氯离子、碱含量和水胶比的控制,采取切实可行的施工方案,最终使得结构顺利实施。In order to control the cracks and deflections of long-span and super-long concrete structures and reduce the adverse effects of concrete shrinkage and temperature changes on concrete beams and slabs,the construction technology of prestressing post-tensioning method for super-long and seamless structures is introduced in detail with the football stadium of Fenghuangshan Sports Center as the carrier.Vertical precise positioning,as well as the control of chloride ion,alkali content and water cement ratio in concrete,adopt feasible construction scheme,and finally make the structure implement smoothly.

关 键 词：超长结构 无缝 预应力 后张 

分 类 号：TU757[建筑科学—建筑技术科学]