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当前楼地面及顶棚板缝的开裂是用户反映较多的问题之一。下面介绍板缝开裂的原因和预防措施。一、开裂原因1.嵌缝时间安排不当。安装完预制楼板后就进行混凝土浇筑及嵌缝,还未等混凝土达到设计强度就进行本楼层的下道工序施工,造成楱板受荷后剪力不能很好传递,板与板不能共同工作,形成裂缝。2.预制空心板在生产过程中,质量控制不严,造成同批楼板刚度有差别。楼板
The cracking of the floor of the current building and the cracks in the roof panel is one of the problems that the user has reflected more often. The following describes the causes of cracks in the board seams and preventive measures. First, the cause of cracking 1. Improper timing of caulking. After the prefabricated floor slabs are installed, concrete pouring and caulking are performed. The construction of the next stage of the floor is not completed until the concrete reaches the design strength, resulting in the shearing force of the slabs not being well transmitted, and the slabs and the slabs cannot work together. Cracks form. 2. During the production process of prefabricated hollow slabs, the quality control is not strict, resulting in differences in the stiffness of the same floor slabs. Floor slab