中湖大桥承台大体积混凝土温度裂缝分析及控制技术

Analysis and Control Technology of Temperature Cracks in Mass Concrete of Zhonghu Bridge Cap

中湖大桥主桥承台的大体积砼浇筑时间正值当地最炎热的月份,为了避免砼凝固过程释放的水化热使承台内外温差过大,而造成承台砼结构出现温差裂缝。在砼热工计算的基础上,针对性地采取了科学有效的降温、控温措施,经对各测温孔的监测数据的分析结果表明,本项目采取的控温技术措施达到了预期效果,避免了大体砼承台产生温差裂缝,确保承台的结构安全。

The large-volume concrete pouring time of the main bridge cap of the Zhonghu Bridge coincides with the hottest month in the local area.In order to avoid the heat of hydration released during the concrete solidification process,the temperature difference between the inside and the outside of the cap is too large,resulting in temperature difference cracks in the concrete structure of the cap.On the basis of concrete thermal calculations,targeted scientific and effective cooling and temperature control measures have been taken.The analysis results of the monitoring data of each temperature measuring hole show that the temperature control technical measures adopted in this project have achieved the expected results.The temperature difference cracks of the general concrete cap are avoided,and the structural safety of the cap is ensured.