桩基开孔斜挡板消浪特性试验研究

Experimental Study on Wave Characteristics of Inclined Piled Baffle Penetrated Breakwater

板式防波堤结构施工便利、造价较低且有利于港内外水沙自由交换,符合“绿色港口”的发展理念。挡板相对入水深度是影响挡板消浪效果的重要因素,但现有研究还未能形成统一规律。该文通过大比尺物理模型试验研究不规则波和孤立波作用下,挡板入水深度对桩基开孔斜挡板消浪特性的影响。结果表明,布置挡板可以减少越浪量75%以上,而入水深度对挡板作用的影响不是单调的。对于不规则波波高,滩地水深0.5 m时,40 cm宽挡板刚好淹没时消减效果最佳;对于孤立波波高,挡板入水深度为20 cm时效果最好。而且,增设挡板对断面所受波压力的影响不大。试验结果可为实际结构设计和相应的数值计算提供参考依据。

The baffle penetrated breakwater structure is convenient for construction,low-cost,and conducive to the free exchange of water and sediment inside and outside the port,which meets the development needs of“green port”.The underwater width of baffle is an important factor affecting the wave dissipation effect of the baffle,but the results ofthe existing research has not been combined organically.In this paper,a large-scale physical model test has been carried out to study the influence of the underwater width on the wave dissipation characteristics of inclined piled baffle penetrated breakwater under the conditions of irregular waves and solitary waves.The results show that the amount of overtopping can be effectively reduced by placing baffles,while the effect of the underwater width of baffle is not monotonous.For the wave height of irregular wave,when the water depth is 0.5 m,40 cm-wide baffle has the best effect when it is just submerged;for the wave height of isolated wave,the effect is best when the underwater width is 20 cm.Moreover,the addition of baffles has little effect on the wave pressure on the cross section.The results of the tests can provide references for the structure design and corresponding numerical calculation.