大体积混凝土温度裂缝控制技术应用进展

Application Progress of Temperature Crack Control Technology for Mass Concrete

近年来,随着我国经济的快速增长,综合国力的提升和城市建设越发加快,高层建筑、大跨度桥梁结构、大坝结构等随处可见,而在这些重要的大型混凝土工程中,混凝土温度裂缝控制问题一直是工程界重视的问题之一,所以对大体积混凝土温度裂缝产生的机理及其控制措施的运用研究显得至关重要。本文在分析大体积混凝土温度裂缝产生主要原因——温度应力的基础上,对大体积混凝土温度裂缝的主要控制措施-材料控制、冷却水管、设置永久变形缝、设置温度后浇带、跳仓施工法等技术的运用进展。

In recent years, with the rapid economic growth, the improvement of overall national strength and the acceleration of urban construction, high-rise buildings, long-span bridge structures and dam structures can be seen everywhere. In these important large-scale concrete projects, crack control has always been one of the most important issues in engineering. Therefore, it is very important to study the mechanism of mass concrete temperature cracks and its control measures. Based on the analysis of temperature stress, which is the main cause of temperature cracks in mass concrete, this paper analyzes application progress of the main control measures of temperature cracks in mass concrete, such as material control, cooling water pipe, permanent deformation joint, temperature post-cast strip and sequence method construction method and other technologies.