桥梁大体积混凝土基础施工温控措施研究  

Research on Temperature Control Measure in Bridge Mass Concrete Foundation Construction

作　　者：杜昊轩 DU Haoxuan(Lianyungang Transport Group Co.,Ltd.,Lianyungang 222000,Jiangsu,China)

机构地区：[1]连云港市交通集团有限公司,江苏连云港222000

出　　处：《工程技术研究》2024年第22期146-148,共3页Engineering and Technological Research

摘　　要：文章以某桥梁基础为例,使用建立数值模拟的方法分析通水冷却管不同排布方式对桥梁大体积混凝土温度和温度应力的影响。研究结果表明:冷却管井字形布设能有效抑制混凝土水化作用产生的温度峰值,温控效果最佳;混凝土在井字形布设、梅花形布设、矩形布设时的最大压应力分别为0.79 MPa、0.68 MPa和2.16 MPa。其中,井字形布设时混凝土内部最大压应力最小,表明冷却管在井字形布设时能有效控制混凝土裂缝的产生。Taking a bridge foundation as an example,this paper uses the numerical simulation method to analyze the influence of different arrangement modes of water cooling pipes on the temperature and temperature stress of bridge mass concrete.The research results show that the well-shaped layout of cooling pipes can effectively inhibit the temperature peak generated by the hydration of concrete,and the temperature control effect is the best;the maximum compressive stresses of concrete in wellshaped layout,quincunx layout and rectangular layout are 0.79 MPa,0.68 MPa and 2.16 MPa respectively.Among them,the maximum compressive stress inside the concrete is the smallest when the well-shaped layout is arranged,indicating that the cooling pipe can effectively control the generation of concrete cracks when the well-shaped layout is arranged.

关 键 词：桥梁大体积混凝土 水泥水化热 温控 通水冷却 

分 类 号：U445.57[建筑科学—桥梁与隧道工程]