南京仙新路过江通道北塔承台施工关键技术研究  

Study on the Key Technology for the Construction of the North Tower of the River Crossing Channel of Xianxin Road in Nanjing

作　　者：王宏翔 郁见 WANG Hongxiang;YU Jian(Nanjing Construction Center of Public Works,Nanjing 210019,China;Nanjing Foreign Language School,Nanjing 210008,China)

机构地区：[1]南京市公共工程建设中心,南京210019 [2]南京外国语学校,南京210008

出　　处：《现代交通技术》2023年第1期54-64,共11页Modern Transportation Technology

摘　　要：南京仙新路过江通道北塔承台平面尺寸为74.8 m×39.8 m,混凝土浇筑方量理论上为23816.32 m^(3),承台施工采用钢板桩围堰支护。参照南京仙新路过江通道北塔承台施工的成功案例,从钢围堰设计比选优化、超大体积混凝土在施工过程中的温度控制方法以及大体积混凝土施工过程中的现场具体组织要素3个方面进行探讨研究,得到提高超大体积混凝土成型后的耐久性并减少成型后温度裂缝等控制施工过程中混凝土质量的方法。The plan dimension of the bearing platform of the North Tower of the River Crossing Channel of Xianxin Road in Nanjing is 74.8 m×39.8 m.The theoretical concrete pouring volume is 23816.32 m^(3).Steel sheet pile cofferdam is used for supporting the cushion cap construction.The research will refer to the successful case of the construction of the North Tower of the River Crossing Channel of Xianxin Road in Nanjing,discussing and studying the optimization of the design of the steel cofferdam structure design,the temperature control method of super-large volume concrete in the construction process and the specific on-site organization elements in the construction process of large-volume concrete,so as to obtain a concrete quality control method during construction that can improve the durability of super-large volume concrete after molding and reduce the temperature cracks after molding.

关 键 词：钢围堰 大体积混凝土 温度测控 质量控制 

分 类 号：U443.25[建筑科学—桥梁与隧道工程]