金刚沱泵站取水口建设对航道的影响及防护方案

Impact of construction of water intake of Jingangtuo pumping station on waterway and protection measures

长江上游河段是长江黄金水道的重要组成部分,渝西水资源配置工程长江金刚沱泵站取水口位于长江上游重庆段胜中坝水道左岸金刚关刀碛滩。近年来,关刀碛丁坝后方串沟受洪水影响进一步扩大,取水口修建后将造成串沟过流,导致主槽水位降低,航道出浅碍航,极端情况下还可能影响取水设施的正常运行。为保证航道通航安全和取水口的取水效率,提出相应的治理方案。通过抛石回填及抛筑扭王字块固滩可有效稳定河势,恢复原边滩形态,抑制后方串沟持续淘刷发展,降低取水设施建设对航道的影响,也可达到稳定取水头运行期取水条件和确保取水效率的目的。

The upper reaches of the Yangtze River are an important part of the golden waterway of the Yangtze River.The intake of the Jingangtuo pumping station in the Western Chongqing Water Resources Allocation project is located on the left bank of the Shengzhongba waterway in the upper reaches of the Yangtze River.In recent years,the channel behind the Guandaoqi spur dike has been further affected by floods.The construction of the water intake will cause the channel to flow over,resulting in a decrease in the water level of the main channel and shallow navigation obstruction.In extreme cases,it may also affect the normal operation of the water intake facilities.To ensure the safety of waterway navigation and the efficiency of water intake,this paper puts forward the corresponding treatment scheme.Through the riprap backfill and throwing the twisted king block to consolidate the beach,the river regime can be effectively stabilized,the original beach morphology can be restored,the continuous scouring development of the rear ditches can be suppressed,and the impact of water intake facility construction on the waterway can be reduced,and the goal of stabilizing the water intake conditions during the operation period of the water intake head and ensuring water intake efficiency can also be achieved.