结合工程实际分析了箱形基础底板大体积砼在冬期施工阶段产生温度裂缝的主要原因 ,提出了砼冬期施工的关键是防止产生温度裂缝 ,对防止砼产生裂缝的主要措施进行了探讨 ,并通过砼体内外温度差的计算 ,砼抗拉强度验算和测温记录验证了这些措施的可行性 . The main reasons for the temperature cracks in the large-scale concrete box floor during the construction period in the winter period were analyzed based on engineering practice. It was proposed that the key to the construction of the cold winter period was to prevent temperature cracks. The main measures to prevent cracks in the concrete were discussed and adopted. The calculation of the temperature difference between the inside and the outside of the carp, the verification of the tensile strength and the recording of the temperature have verified the feasibility of these measures.