斜向波作用宽肩台式防波堤稳定性试验研究

Experimental study on stability of berm breakwater under obliquely-incident wave action

宽肩台式抛石防波堤对于石料来源丰富的地区是一种比较经济的结构型式。它是依靠波浪长期作用下最终形成的动力平衡断面来进行防浪的。我国的宽肩台式抛石防波堤建设较少,对其开展的研究也较少,目前主要是通过波浪断面物理模型试验来研究其稳定性,对于斜向波作用下的三维稳定性文献报道很少。文章以某宽肩台式防波堤工程为实例,通过三维波浪物理模型试验研究了斜向波作用下宽肩台式防波堤的稳定性,得到了工程稳定的宽肩台断面结构和优化结构平面布置。并从宽肩台坡面块石的运动形态以及最终形成的动力平衡剖面对斜向波和正向波作用宽肩台防波堤的结果进行了对比分析。

The berm breakwater is an economical type structure when the rocks are very abundant in some area.It depends on the dynamical equilibrium section formed by long time wave action to carry out anti-waves protection.In China,the berm breakwater is seldom constructed and the research work is also rarely done.Its stability is mainly studied by cross-section physical model and the report about the 3D stability under the oblique wave action cannot be found at present.In this paper,the 3D stability of a berm breakwater project under the oblique wave action was researched.The cross-section of breakwater and plan layout which meet the design requirement were obtained by experiment.The results of oblique wave and forward wave acting on berm breakwater were compared and analyzed from the movement form of blocks on the slope and the final dynamic balance profile.