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梅溪河特大桥位于重庆奉云高速公路奉节段,本文主要介绍梅溪河特大桥3#主墩承台大体积C35混凝土温度裂缝控制计算及控制。通过数值计算获得了大体积混凝土内部温度场分布,进而确定了最大拉应力位置及有可能出现裂缝的位置。根据计算结果,提出了一系列的温控措施,涉及到冷却管管径的选择、布置及测温点的埋设。实践证明梅溪河特大桥承台大体积混凝土的温度控制是成功的,本研究成果对各类大体积混凝土温度裂缝控制计算及控制手段有重要的参考价值。
Meixi River Bridge is located in Fengjie Expressway in Fengjie, Chongqing. This paper mainly introduces the calculation and control of temperature crack control of large volume C35 concrete pile of No.3 pier of Meixi River Bridge. Through the numerical calculation, the temperature field distribution inside the mass concrete is obtained, and the position of the maximum tensile stress and the location of the possible cracks are determined. According to the calculation results, a series of temperature control measures are put forward, which are related to the choice of the cooling pipe diameter, the layout and the embedding of the temperature measurement point. Practice shows that the temperature control of the mass concrete in the cap of Meixi River Bridge is successful. The results of this study have important reference value for the calculation and control of temperature cracks in various types of mass concrete.