透空式防波堤消波性能试验研究

Test and Study on the Effects of Wave Dissipation for a Permeable Breakwater

本文以长江口地区一高桩承台防波堤工程实例,在风浪水槽中进行透浪系数K_T的模型试验,试验结果表明堤内的透过波高与水深、波要素、堤宽、挡浪板的入水深度有关;挡浪板设置方式、风速大小都对消波效果起着重要作用。本文所提出的满足K_T要求的B/L、d/L、t/d数值范围可供设计参考。

Taking the permeable breakwater(with a high-level deck)at the estury of Yangtze River as a practical example,this paper makes description on the model test for determining the wave permeability factor KT in a wave-wind test basin.The test results showed that the permeated wave height inside the mole was related to the water depth, wave characteristics,width of mole and the submerged depth of wave-damping plate. The arrangement of wave-damping plate and wind velocity would greatly influence the effects of wave dissipation. This paper provides some values of B/L, d/L, t/d in order to meet the requirement of KT, which will be useful in the design.