高强度混凝土渡槽结构承载能力高，但水化放热量也大，在夏季浇筑时混凝土温控防裂难度较大。采用非稳定温度场及应力场的有限元计算方法，对夏季施工的典型渡槽结构进行了施工过程的仿真计算。根据不同工况的温度场和应力场计算结果，分析了易裂部位的开裂原因，提出了相应的水管冷却和表面保温措施，可为类似高强度混凝土结构的设计和施工提供有益的参考。

In spite of high carrying capacity, it involves great difficulty to control the temperature and prevent cracking during the construction of high strength concrete aqueduct in summer because of high heat of hydration. The finite element method for unsteady temperature field and stress field is applied to simulate the construction process in summer for a typical aqueduct structure. The cause of cracking at dangerous positions is analyzed based on the calculation results of temperature field and stress field in different cases. Corresponding measures of pipe cooling and surface thermal insulation are put forward, which will be beneficial for the design and construction of such high strength concrete structure.