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． The relationship between the number of negative temperature days and the thickness of the reservoir ice sheet is studied. The temperature difference of ice water temperature is taken into account. The freezing process of the gate area is numerically simulated. The ice pressure results of prototype observation are qualitatively analyzed. Different diurnal changes of stress and ice stress in the reservoir area. The reasons for the small opening degree of arc gate under the action of ice are explained and the opening amount is estimated approximately.