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该文对笔架山连岛沙坝形成的原因及现状进行了分析,并通过整体物理模型实验研究了造成连岛沙坝侵蚀的原因。在无法恢复水动力平衡的前提下,修复连岛沙坝并使其保持稳定的根本措施是降低东侧的水动力条件对其的侵蚀作用,因此选用潜堤作为连岛沙坝修复后的消浪措施,并通过物理模型实验验证了潜堤的消浪效果。研究结果表明:当双向交替的波动力变成单向动力场后,连岛沙坝的平衡状态即被打破,在波浪与潮流的共同作用下使连岛沙坝受到了严重的侵蚀,但修建潜堤后,潜堤会有效的消减波浪对连岛沙坝的侵蚀作用。
This paper analyzes the causes and the current situation of the formation of Beibu Mountain island sand bar and studies the reasons of the erosion of the island barrage by the physical model experiment. Under the premise that the hydrodynamic balance can not be restored, the fundamental measure of rehabilitating the island sand dam and keeping it steady is to reduce the erosion of the east hydrodynamic conditions. Therefore, Wave measures, and through the physical model experiments to verify the diving dikes wave effect. The results show that when the alternating two-way wave force becomes a unidirectional dynamic field, the balance of the island sand bar is broken, and the island sand bar dam is seriously eroded by the wave and the tidal current. However, After the submerged embankment, the submarine embankment will effectively reduce the wave erosion of the island archipelago dam.