强潮河段弯道海塘丁坝群防护效果试验研究

Experimental Study on Protective Effect of Spur Dikes in Bend Seawall in Strong Tidal Reaches

针对强潮河段弯道海塘建设维护中,如何有效布置丁坝群才能达到最优防护效果的问题进行了探讨。以柯桥海塘为例采用整体物理模型对设计强潮动力条件下的不同丁坝布置形式的防护效果进行试验研究,试验结果表明,丁坝高程宜布置在平均潮位以上,低丁坝群的坝距与坝长比控制在3.125内较为合适,采用两低一高的布置形式防护效果性价比相对较优。研究结果可供强潮河段弯道海塘丁坝群设计参考。

In view of the construction and maintenance of the bend seawall in the strong tidal reaches,how to effectively arrange the groins to achieve the optimal protection effect is discussed.In this paper,taking Keqiao seawall as an example,the overall physical model is used to test and study the protective effects of different groin arrangements under the design strong tide dynamic conditions.The test results show that the groin height should be arranged above the average tide level;it is appropriate to control the ratio of dam spacing to dam length within 3.125 for low groins;the protective effect of adopting the layout of“one high groin being arranged behind two low groins”is relatively superior in cost performance.The research results can be used as a reference for the design of spur dikes in bend seawall in strong tidal reach.