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马鞍山大桥主塔塔座混凝土强度等级高、胶材用量大、绝热温升高、温度裂缝控制困难。针对大桥主塔塔座的施工特点,在仿真计算的基础上,采用优化混凝土配合比、隐式榫头结构设计,布设冷却水管、加强养护等温度控制措施,并进行现场温度监控。经现场检查,大体积混凝土未出现有害温度裂缝,达到了预期的控裂效果。
The Ma’anshan Bridge tower has a high concrete strength grade, a large amount of plastic material, high adiabatic temperature and difficult temperature crack control. According to the construction characteristics of the main pylon seat of the bridge, on the basis of the simulation calculation, the temperature control measures such as optimizing concrete mix ratio, implicit tenon structure design, laying cooling water pipes, strengthening curing and so on were adopted and on-site temperature monitoring was carried out. After the on-the-spot inspection, mass concrete does not appear harmful temperature cracks, reaching the expected control cracking effect.