铁道科学与工程学报Issue(5)：1172-1178,7.
考虑水管冷却的大体积混凝土承台温度控制研究
Analysis of te mperature control for mass concrete bearing platform with water pipe cooling considered
摘要
Abstract
Considering the water pipe cooling effect in the mass concrete bearing platform of a continuous rigid frame bridge,a sophisticated calculation model of heat transfer coefficient was adopted.Numerical analysis of the temperature field caused by hydration heat was simulated by finite element program and the calculation results show a good agreement with the in -site measurements.Then the variation law of inner temperature gradient along the height direction and longitudinal direction was analyzed,and the temperature field with water pipe cooling effect considered or not was compared.It is found that the surface of the bearing platform is the dangerous zone for temperature cracking.Hence the curing work of thermal insulation should be performed during the construc-tion to control the temperature difference between interior and exterior within 25℃.The cooling effect of water pipe is remarkable and it is an effective measure for temperature control and crack prevention in the construction of mass concrete bearing platform.There is no thermal cracking after the removal of the formworks,which demon-strates that the effect of temperature control is satisfactory.关键词
大体积混凝土承台/水管冷却/对流换热系数/温度场/数值分析Key words
mass concrete bearing platform/water pipe cooling/heat transfer coefficient/temperature field/nu-merical analysis分类
建筑与水利引用本文复制引用
鲁正刚,王修信..考虑水管冷却的大体积混凝土承台温度控制研究[J].铁道科学与工程学报,2015,(5):1172-1178,7.基金项目
国家自然科学基金面上项目 （）
