三峡船闸六闸首输水阀门运行方式优化

Optimization of Valve Operation in the Sixth-step Shiplock Head of Three Gorges Project

针对三峡船闸五闸室泄水运行中存在的问题,通过数模计算分析和原型调试研究,在维持现有运行方式大体不变的条件下,采用实时监测到的箱涵出口与下游引航道水位差,确定与之相适应的动水关阀小开度控制阀门运行的方法,较好地解决了六闸首阀门枯水期不能正常关至小开度从而造成闸室超泄偏大和汛期枢纽下泄流量较大时人字门不能按程序正常开启的问题,给出了适应于不同下泄流量下的六闸首阀门动水关闭参数,可保证在通航流量范围内,五闸室泄水时均无须动用辅阀,提高了通航效率。

This research is aimed at problems occurred in the water release operation of the five-step shiplocks of Three Gorges Project （TGP）. By using numerical modeling and prototype measurements, we present the operation mode of controlling the valves of shiplocks＇ tank under water level fluctuation according to the difference between observed water level at the outlet of water tank and at the downstream approach channel. In the meantime, the present operation schemes were rarely disturbed. By adopting this new mode, problems that valves of the sixth-step shiplock head cannot be closed to a small opening during dry season and lock-sills cannot be opened normally during flood season with large discharge are solved. The operational parameters for closing the lock heads in the pres-ence of different water discharges are given, in which case the auxiliary valves need not to be enabled and the nec-essary navigation discharge can also be guaranteed. The navigation efficiency could be improved by using the new operational mode.