斜拉桥下塔柱大体积混凝土温控研究

大体积混凝土由于其聚集的水化热高且混凝土散热困难,因此温度裂缝控制是大体积混凝土施工的关键。该文结合工程实例,依据温控标准,提出温度控制措施,通过Midas软件模拟大体积混凝土的温度场,分析混凝土浇筑、水管冷却及边界条件等因素对其温控的影响,并制定相应的温度监测方法以检验温控标准和措施效果。其数值分析与现场监测结果达到较好的吻合。

Study on Temperature Control of Massive Concrete of Lower Pylon Column of Cable-stayed Bridge

It is critical to control the temperature crack in the construction of massive concrete due to its aggregation of high hydration heat and its difficulty of heat radiation. Based on the engineering examples, this paper puts forward the temperature control measures according to the temperature standards. Via Midas software to simulate the temperature field of massive concrete, the paper analyzes the influences of concrete pouring, water pipe cooling and boundary condition on its temperature control, and sets down the relevant temperature monitoring method to inspect and test the temperature control standards and measure effects. The study indicates that the numerical results meet the on-site monitoring findings well.