中文摘要：

运用有限单元法对施工期混凝土进行了仿真计算，分析了混凝土施工期温度场和应力场的时空变化规律，找出了基础底板裂缝容易出现的部位，为后续的温控防裂方法的研究提供了参考依据．

英文摘要：

In view of the problem of mass concrete cracks during construction in winter, the corresponding measures and methods are put forward. Generally speaking, the difference between the internal and external temperature and the basic difference of temperature are considered as the main factors influencing the phenomena. The FEM （Finite Element Method） is adopted to simulate the thermal stresses field of bottom plate of gravity dam during construction in winter. Through analyzing the time-space variation law, the place where the cracks of bottom plate easily appear is obtained. This can provide the reference for the further optimization of temperature control measures for crack orevention.