长江下游黑沙洲水道航道整治二期工程模型试验研究

摘要

黑沙洲水道是长江下游重点碍航水道之一.一期整治工程实施后,航道条件得到改善,但遇不利水文条件时,航道淤积严重,需进一步实施二期整治工程措施缓解航道维护压力.通过分析该河段的河道演变和碍航特征,采用动床模型试验的研究手段,对航道整治二期工程初设阶段的工程方案进行了系统研究,提出推荐方案.推荐方案实施后,黑沙洲水道河势基本保持不变;南水道右槽航道分流比增加,浅区冲刷,航道条件得到有效改善.%Heishazhou Waterway is one of the main navigation-obstructing shallow waterways downstream the Yangtze River.After the phase I channel regulation project,channel conditions are improved gradually.But when encountered the flood years,channel silts seriously so that the phase Ⅱ of the regulation project is needed.Based on the characteristics of waterway evolution and navigation-obstruction and using movable bed models experiments,this paper researches the phase Ⅱ of the regulation project systematically and proposes the recommended scheme.After the scheme,river regime of Heishazhou Waterway is no obvious change;the discharge of the right channel increases and the shoal area is scoured.The channel conditions are improved effectively.