三峡工程新增一线船闸对上游引航道通航水流条件的影响

Influence of Newly Increased Lock of Three Gorges Project on Navigation Flow Condition of Upstream Approach Channel

通过建立三峡工程上游引航道近闸区域的三维水力学计算模型,计算了增加一线船闸后上游引航道内通航水流条件,分析了145、175m两种典型通航水位条件下三线船闸不同充水组合对通航水流条件的影响。结果表明,三线船闸运行时,各船闸单线充水均可满足规范通航要求;两线或三线船闸同时充水时,上游引航道内部分区域不能满足通航要求,尤以145m水位时为甚,可通过错时充水的方式来满足通航水流条件的要求。

In this paper,three-dimensional hydraulic computational model of near navigation lock area in the upstream approach channel of Three Gorges Project was built to calculate the flow condition of the upstream approach channel for adding new navigation lock.It mainly studies on the influence of navigation flow condition under different water filling combination of two typical navigable water level(145 mand 175 m).The results show that each navigation lock filling water alone can meet the specification requirement under condition of three navigation locks running at the same time.However,it can not meet the navigation requirements for the area of upstream approach channel under conditions of two or three navigation locks running at the same time,especially at condition of 145 m water level.But it can meet the requirements by the solution of filling water at stagger time.