南京长江第四大桥北锚碇大体积混凝土施工温控技术  

Temperature Controlling Technologies for Large Volume Concrete of The North Anchorage of Nanjing Yangtze River Fourth Bridge

作　　者：孙克强[1] 陈圆圆[1] 牛亚洲[1] 张东东[1] 荆刚毅[1] 

机构地区：[1]中交第二公路工程局有限公司,陕西西安710065

出　　处：《现代交通技术》2013年第5期33-37,共5页Modern Transportation Technology

摘　　要：南京长江第四大桥北锚碇为典型的大体积混凝土结构,在施工过程中要制定相应的温控措施,防止因水化热作用而使混凝土产生裂缝。文章结合现场的水文、气象及施工条件,针对锚体结构提出了各项温控措施,包括锚体分层浇筑、混凝土配合比优化设计、布置冷却水管、现场温度监测等;并采用有限元软件MIDAS对结构进行模拟分析,对温控效果进行预测,同时为现场施工提供监控数据。The north anchorage of Nanjing Yangtze River Fourth Bridge is a typical large volume concrete structure. Tempera- ture control measures should be taken during construction to prevent cracks producing due to hydration heat. Combined with hydrology and meteorology of the construction site, this paper proposed temperature control measures for anchorage struction, including pouring in layers, mix proportion optimum design for concrete, setting cooling water pipes, temperature monitoring in site and so on. Meanwhile the structure is simulated by professional finite element software MIDAS to predict the influ- ences of temperature control and provide monitoring data for the construction.

关 键 词：大体积混凝土 温控 水化热 裂缝 配合比 冷却水管 

分 类 号：U445.55[建筑科学—桥梁与隧道工程]