新型植被海堤波浪溢流破坏的堤形敏感性研究

Research on geometry sensitivity of HPTRM-strengthened levee under wave overflow

通过理论分析研究高效加筋草皮垫防护海堤在不同波浪溢流作用下背水侧坡脚处的冲刷变形过程,推导出坡脚冲刷厚度和草皮防护垫破坏历时的经验公式。比较分析5种不同形态海堤的破坏过程,发现较缓的背水坡坡度以及添加副堤对减轻水流紊动切应力与防冲的效果明显,减小堤顶宽度一定程度上可以降低紊动切应力和冲刷率,而增大迎水侧坡度对坡脚的冲刷率影响不大。

On the basis of theoretical analysis of erosion deformation process under different wave overflow, the equation of slope erosion thickness and in the levee toe on the dorsal water side turf protection pad damage duration is provided. With the help of analyzing the damage process of five different levee types, a narrower crest width or a lower land-side slope are more effective for the reduction of the bottom shear stress as well as the erosion rate. Besides, an additional mild berm is also helpful to the protection.