桩式离岸堤保滩促淤工程消浪效果试验研究  

An experimental study on effects of offshore pile dikes for beach protection

作　　者：龚崇准[1] 陈美发[2] 朱宪伟 顾家龙[1] 张玮[1] 沈正潮 

机构地区：[1]河海大学交通与海洋工程学院,江苏南京210024 [2]上海水务局,上海200040 [3]上海市滩涂管理处,上海200122

出　　处：《海洋工程》2001年第4期72-77,共6页The Ocean Engineering

摘　　要：在上海奉贤南门港保滩促淤工程中 ,采用了一种新型结构型式———桩式离岸堤 ,并通过物理模型试验进行了桩式离岸堤消浪效果研究。针对离岸堤通常建于近岸浅水区破波带的特点 ,重点研究水深、堤高以及堤身结构对波浪衰减的影响 ,同时对桩式离岸堤堤后水域的波浪底流速进行了分析探讨。研究结果表明 ,桩式离岸堤不仅具有良好的消浪效果 ,而且可在较大范围内改变波态 ,即由引起水体剧烈紊动的破波转变为浅水推进波 ,从而有效地改善海滩上的动力条件 ,保护海滩免受侵蚀 。For a beach protection project in Shanghai, a new structure, i.e. offshore pile dike, was introduced, and an experiment was conducted to study its effects on wave dissipation. As an offshore dike is usually built in the surf zone, the study was focused on the impact of water depth, dike height and dike structure on the wave dissipation, and the current velocity on the bottom deduced by the wave behind the dike was analyzed, too. It is showed that the offshore pile dike not only can reduce the wave energy, but also can change the wave status from a surf wave to a shallow water wave. This will improve the dynamic conditions on the beach and protect it from erosion. It can be concluded from this study that the offshore pile dike is an effective new structure for beach protection.

关 键 词：桩式离岸堤 保滩促淤工程 浅水波浪 消浪效果 海滩侵蚀 

分 类 号：TV871[水利工程—水利水电工程]