长江上游莲石滩航道整治模型试验

莲石滩是长江上游著名的复杂险滩,具有浅、险、急等复合碍航特性。基于前期碍航特性、成滩原因和治理思路等研究成果,结合整治目标,对鱼鳅石浅滩和关刀碛急滩分别采用"疏槽维稳"和"扩枯稳中"的整治思路,根据设计航槽走向的不同提出两组方案进行模型试验。结果表明,两组方案均可基本解决碍航问题,方案2在顺应河势、航线选择、整治效果方面更优。

Model experiment of waterway regulation of Lianshitan in the upper Yangtze River

Lianshitan is a well-known complex rapid in the upper Yangtze River,with the navigation obstacle character of shallow,dangerous and large velocity.Based on the navigation obstruction characteristics,beach-forming reasons and thought of regulation,combined with the target of regulation,we put forward two schemes for model test according to the different directions of the design waterway.Regulation thoughts of two schemes are dredging navigation and remained stable for Yuqiushi shoal,expanding navigation in the dry season and remained stable in the middle water period for Guandaoqi rapids.The results show that two schemes can both basically solve the navigation obstruction problem,and the second scheme is better in adapting to the river regime,route selection and regulation effect.