明基床上开孔沉箱垂直力峰值对应的水平力分析

Analysis on total horizontal forces of perforated caisson sitting on rubble mound foundation while total vertical force reaches its peak

利用水槽二维物理模型对规则波及不规则波作用下明基床上开孔沉箱所受到的波浪力进行了较为系统的试验研究。分析了开孔沉箱总垂直力峰值时刻对应的总水平力与相对基床高度、消浪室相对宽度、波陡、相对水深以及开孔率等影响因素之间的关系,给出了明基床上开孔沉箱总水平力比值(总垂直力峰值时刻对应的总水平力/总水平力峰值)与各影响因素之间的计算关系式。研究成果可供实际工程参考应用。

There exists a phase difference between the total horizontal force and the total vertical force of perforated caisson, which doesn＇t reach its peak value synchronously. Through 2D experiments in the wave flume under the condition of regular and irregular waves, this paper analyzes the relationships between the total horizontal force corresponding to the moment of maximum total vertical force and main influencing factors, such as the relative foundation height, the relative chamber width, the wave steepness, the relative depth and the opening ratio of perforated caisson. A simplified method for calculating the ratios of total horizontal forces （ total horizontal force when the total vertical force reaches its peak/the peak value of total horizontal forces ） and their major factors are proposed, which may be useful for engineering design and application.