冬期进行混凝土施工,受气温的影响,施工需要采取一些处理技术。冬期尤其是混凝土工程质量事故的多发季节,而且有明显的滞后性,即冬期浇筑的混凝土出现质量问题时,多在春融或后期呈现。由于事故发现较晚,所以处理难度较大。冬期混凝土施工关键是控制混凝土的裂缝。裂缝危害性很大,这些裂缝破坏了结构的整体性,改变了设计安排的应力分布图形及混凝土的受力条件,从而有使局部甚至整体结构发生破坏的可能,即使是一般的表面裂缝对混凝土的耐久性也是有损害的,出现裂缝的结构温度应力迭加,对整体结构的应力状态,在运行阶段具有不可忽视的影响,所以控制裂缝的产生,对于冬期混凝土施工具有深远影响。现通过分析与探讨混凝土冬期施工裂缝产生的特性及原因,提出了相应的控制措施。 Winter concrete construction, affected by the temperature, the construction needs to take some processing technology. In winter, especially the frequent occurrence of concrete engineering quality accidents, and there are obvious hysteresis, that is, the quality of concrete pouring in winter is more than that in spring or late. Due to the late detection of the accident, the treatment is more difficult. Winter concrete construction is the key to control the cracks in concrete. Cracks are very dangerous. These cracks undermine the integrity of the structure, changing the stress distribution pattern and stress conditions of the concrete design, which may make partial or even whole structure may be destroyed. Even the general surface cracks on the concrete The durability of the structure is also damaging. The temperature stress of the cracked structure is superimposed on the stress state of the whole structure and can not be neglected in the operation stage. Therefore, the control of the crack generation has a far-reaching impact on the concrete construction in winter. By analyzing and discussing the characteristics and causes of concrete cracks in winter construction, the corresponding control measures are put forward.