近岸人工沙坝保滩促淤的试验研究  

Experimental study on the shore nourishment for beach protection and siltation promotion

作　　者：吴建[1,2] 拾兵[2] 李智 刘德飞 范菲菲[2] 

机构地区：[1]海军92786部队 [2]中国海洋大学工程学院 [3]海军南海舰队工程办公室

出　　处：《海洋通报》2012年第2期176-180,共5页Marine Science Bulletin

基　　金：863计划(2008AA09Z309);国家自然科学基金项目(50879084)

摘　　要：借助正态波浪模型,对北戴河海滩某横断面有、无沙坝布置进行了3种水位的极限波高入射试验,测取了坝内外波高过程线及稳定后的断面地形。试验资料及理论分析显示:有无沙坝时沿岸流及波浪的挟沙能力之比与水下沙坝的波浪透射系数的平方成正比,按试验最大透射系数计算的挟沙能力亦可降50%左右,且有沙坝上涌带破波回流对岸滩的冲刷水深可以维持在平均海平面以下1 m内,说明人工沙坝的填筑很大程度促使水体挟带泥沙于掩护区域落淤有效的阻止了泥沙的离岸亏损。试验将为保滩促淤工程设计与实施提供科学依据。By using the normal wave model, this paper studies the cross-section profile of the Beidaihe beach with or without the shore nourishment through the measurements of limit wave height at three kinds of water levels, and the wave height inside and outside the bar and stable terrain of beach strand. The analysis data shows that the wave transmission coefficient decreases with the water level dropping. The sediment carrying capacity of littoral current weakens enough so that sediment may deposit in the lee of artificial bar. To a certain extent, the shore nourishment can prevent the loss of sediment offshore. The research result can provide scientific data for the design and implementation of the engineering for protecting the beach and promoting the silt.

关 键 词：海滩侵蚀 人工养滩 水下沙坝 透射系数 保滩 

分 类 号：P753[交通运输工程—港口、海岸及近海工程]