三峡工程上游引航道布置对通航水流条件的影响

三峡工程上游引航道布置在设计过程中进行了多种方案的试验研究 ,通过 1:10 0的物理模型 ,从河势演变、枢纽泄洪、船闸灌水等方面对各方案引航道口门区、连接段和引航道内的通航水流条件进行了分析比较。结果表明 ,全包开山开口方案最佳 ,但综合考虑工程和清淤量等因素 ,目前选择了全包方案。

Effects of Arrangement of Upstream Approaching Channel of Flow Conditions of the Three Gorge Project

Various arrangements of upstream approach channel of the Three Gorge Project are studied.By the physical model on the scale of 1:100,navigable flow conditions in the channel,around the channel entrance and at the channel connecting section under various plans are analyzed from the aspects of river bed evolution,flood discharge and lock filling.It's shown from the result that the all-inclusive plan with excavated channels and opened holes is the optimum one.However,it's not selected at present in consideration of the quantities and silt clearance.