环抱式防波堤口门航道横流三维特性研究

发布时间：2018-01-23 06:16

本文关键词： 环抱式防波堤浅滩深挖槽三维水流口门航道横流　出处：《海洋工程》2014年01期 　论文类型：期刊论文

【摘要】：环抱式防波堤口门易出现较大横流,且三维特性明显。针对连云港主港区深水航道,建立三维潮流数学模型,并用现场航槽实测资料进行验证,在此基础上计算分析了不同潮差条件下口门段进港航道横流的三维特性。研究结果表明:最大横流约出现在高潮位前1.5 h,自表层至底层相继出现,且表、底层出现时刻仅相差0.5 h;因航道边坡较小,最大横流时未见水流分离现象,航槽底部没有反向流;各层最大横流值均与涨潮潮差有关,且相关程度高;航道内最大横流垂向分布梯度随潮差增加略有增大。
[Abstract]:In view of the deep water channel of Lianyungang main port, a three-dimensional tidal current mathematical model is established and verified by the measured data of the navigation channel on the spot. On this basis, the three-dimensional characteristics of the cross flow in the entrance channel of the portal section under different tidal differences are calculated and analyzed. The results show that the maximum cross flow occurs about 1.5 h before the high tide level and appears successively from the surface to the bottom. The appearance time of the bottom layer was only 0.5 h; Because of the small slope of the channel, no separation of water flow is seen in the maximum transverse flow, and there is no reverse flow at the bottom of the channel. The maximum cross current value of each layer is related to the tidal range of high tide, and the correlation degree is high. The vertical distribution gradient of maximum transverse flow in the channel increases slightly with the increase of tidal range.
【作者单位】：河海大学港口海岸与近海工程学院;
【基金】：国家高技术研究发展计划(863计划)资助项目(2012AA112509)
【分类号】：U617
【正文快照】： 环抱式防波堤能起到防浪挡沙,改善港内泊稳条件的作用,是目前淤泥质海岸开敞海域建港采用的主要形式。因其具有围海面积大、口门伸出外海远的特点,经建筑物挑流作用,导致口门附近进港航道内产生较大的横流(垂直于航道的流速分量)。此外,随着船舶大型化发展,航道水深不断加大,

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