工程实践中发现,混凝土结构裂缝大多数为拆模时已经形成,属于施工期间出现的早期裂缝。现就拆模时间不当而产生楼板裂缝的原因进行分析,提出施工现场预防裂缝的一些建议,以供商榷。1拆模时间不当产生裂缝的原因GB 50666—2011《混凝土结构工程施工规范》第4.5.2条规定“底模及支架应在混凝土强度达到设计要求后再拆除;当设计无具体要求时,同条件养护的混凝土立方体试件抗压强度应符合表4.5.2的规定”(表4.5.2略)。 Engineering practice found that most of the cracks in concrete structures have been formed when the demolition, which belongs to the early cracks during construction. Analysis of the reasons for floor cracks caused by improper mold removal time is put forward and some suggestions on preventing cracks at the construction site are put forward for discussion. 1 reasons for improper mold release cracks GB 50666-2011 “Concrete Structure Engineering Construction Code,” Article 4.5.2 provides that “the bottom mold and the support should be in the concrete strength to meet the design requirements and then removed; when the design without specific requirements, The compressive strength of concrete cubes with the same curing condition shall meet the requirements in Table 4.5.2 ”(Table 4.5.2 omitted).