桥梁大体积混凝土温度裂缝控制与处理

Control and Treatment of Massive Concrete Temperature-shrinkage Cracks in Bridges

为了使桥梁大体积混凝土温度裂缝得到有效控制,针对桥梁大体积混凝土工程的特点,通过对桥梁大体积混凝土温度裂缝产生的机理分析研究,认为混凝土内外温差、自身约束和外部约束共同作用产生的温度应力是形成桥梁大体积混凝土温度裂缝的主要原因,并从设计和施工两个方面提出了控制措施,并对温度裂缝的处理提出了对策。

By analyzing the characteristics and the mechanism of massive concrete temperature shrinkage cracks in bridges, the paper finds out the main causes, that is, temperature difference between inside and outside of the concrete, and the temperature stress caused by self-constraint and external constraint of the concrete. With regard to the design and the construction, some control measures and treatment for the temperature cracks are proposed.