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大体积砼结构的截面尺寸较大,由外荷载引起裂缝的可能性很小,但水泥在水化反应中释放的水化热所产生的温度变化和砼收缩的共同作用,会产生较大的温度应力和收缩应力,将成为大体积砼结构出现裂缝的主要因素。为此,现结合实际工作经验,对防治建筑大体积砼裂缝的施工问题进行探讨,并分析了裂缝的成因,最后提出了一些主要管理措施。
Large-size concrete structure of the larger cross-sectional area, the possibility of cracks caused by the external load is very small, but the cement hydration reaction in the hydration heat generated by the temperature changes and the combined effect of concrete contraction, will have a larger Temperature stress and shrinkage stress, will become the main factor of cracks in the mass concrete structure. To this end, combined with the actual work experience, the prevention and treatment of construction of large concrete cracks in the construction of the issue to be discussed and analyzed the causes of cracks, and finally proposed some of the major management measures.