长江中游马家咀水道航道整治工程模型试验研究及工程效果分析

Model test on channel regulation project in Majiazui channel in middle reaches of the Yangtze River and analysis of engineering effect

利用原型河道观测资料分析和河工模型试验手段,成功地预测了长江三峡水库蓄水运用初期马家咀水道河床演变趋势。在此基础上,对航道总体治理方案进行试验研究,提出分期实施整治工程方案的原则及内容。工程实施后,南星洲右汊近岸航槽不断冲刷发展,河心槽及左汊淤积,左汊分流比下降,基本达到了将主流与主航槽稳定于南星洲右汊近岸槽的整治目标,航道条件显著改善,满足近期建设规划尺度。本河段航道治理经验可为长江中下游分汊河段的航道整治提供借鉴,并对航道整治可能会给相邻河段带来的影响及其解决措施提出建议。

Based on the successfully predicted Majiazui waterway riverbed evolution trend using the prototype observation dz^ta analysis and model test method, the paper studies the channel regulation measures, and puts forward the principle and contents. After the project, Nanxingzhou right branch channel was scoured, the channel slot and left branch deposited, the left branch diversion ratio decreased, and the channel condition was improved significantly and thus met the channel＇ s planned scale. The successful experience may serve as reference for the middle and lower reaches of the Yangtze River waterway regulation.