连续刚构桥承台施工中的温度分析

Temperature Analysis for Construction of Supporting Terraces in Continuous Frame Bridge

现场测试了预应力混凝土连续刚构桥2个不同厚度的承台施工过程的温度变化,按理论方法分析了冷却水对降低混凝土水化热引起的最高温度的贡献,并且将理论分析结果与实测结果进行了比较。结果表明,对于厚度较大的承台,冷却水对降低混凝土最高温度的作用更加明显。

The changes of temperature during construction process for two supporting terraces with different thickness, in a continuous frame bridge, are spot test in this paper. Contributions of cooling water for reducing the highest temperature arisen by concrete hydrate heats are analyzed according to theoretical method. It also compares both results of theoretical analysis and actual test here. The result shows that cooling water makes a more obvious effect on reducing the highest temperature to the thicker supporting terrace.