富春江船闸扩建改造工程闸室输水水力特性及优化*

随着我国内河航运的不断发展，以保留老船闸使其兼作新船闸引航渠为方案的船闸扩建改造已成为突破内河通航“瓶颈”的创新性举措，并已成功运用于富春江船闸扩建改造工程。研究成果表明，输水阀门线性全开时，由于老船闸上闸首口门处过水断面较小，新闸室充水时老闸室内水位迅速下降，并在其门槛处产生7.15 m的集中跌落。在满足闸室输水时间的前提下，综合阀门启闭力、振动、空化及闸室惯性超高等特性，提出改造方式下船闸充水阀门分段间歇性开启加动水关闭的优化运行方式，使老闸室门槛处集中跌落降至0.5 m，有效地改善了引航渠内的水流条件。

Optimization of hydraulic characteristics of conveyance water lock in Fuchunjiang ship lock extension and reconstruction project

It is an innovative measure for improving the inland shipping capacity by preserving the outdated ship lock as an approach channel in extension and reconstruction projects including Fuchunjiang ship lock.The results show that the water level of the outdated lock chamber will decrease rapidly during water filling for the new chamber due to the smaller wetted area at the entrance of the outdated navigation lock.Consequently,the concentrated hydraulic drop formed commonly at the doorsill of the outdated navigation lock is 7.15 m.Under the prerequisite of satisfying the requirement of the filling time and considering characteristics including the hoisting capacity,vibration,cavitation and over filling (emptying).We propose the optimized mode of the conveyance water locks,i.e.,inermittent opening combined with closing in dynamic water,which makes the concentrated hydraulic drop at the doorsill of the outdated navigation lock reduced to 0.5 m.The flow regime in the approach channel is improved with the optimized mode.