水库冰盖厚度及弧门自开启原因的研究

研究了负温度日数和水库冰盖厚度的关系；计及冰下水的温差密度流，数值模拟了闸区的结冰过程；对原型观测的冰压力结果进行了定性分析，说明了闸前的冰应力与库区冰应力的不同的日变化机制；对冰作用下的弧门小开度自开启原因作了说明并对开启量作了近似估计.

Study on the cause of forced lifting of radial gate due to ice action

The relationship between ice cover thickness of reservoir and its frozen duration is studied and the growing process of the ice cover is simulated in consideration of the density flow caused by temperature difference. The analysis on the ice pressure acting on the gate measured in the field test helps to explain why the history curves of ice pressure differs from that in reservoir. The forced lifting height of the radial gate due to ice action is estimated. The result is in accordance with the field observation.