贵港航运枢纽二线船闸输水系统水力学试验

Hydraulic experiment for the second-line ship-lock's filling-emptying system of Guigang navigation project

贵港航运枢纽位于贵港市上游6.5 km处西江郁江河段,船闸设计有效尺度280 m×34 m×5.6 m(长×宽×门槛水深),采用闸墙长廊道多支管分散输水系统形式,设计最大水头14.1 m.通过对输水系统水力特性、廊道压力、闸室和上下游进出口流态、船舶(队)系缆力的观测,提出了上闸首阀门后廊道高程、闸室三明沟消能等部位的合理布置方案,杜绝了充水过程中的门后检修门井掺气,进一步均匀闸室内横向水流分配,使得设计船(队)舶的泊稳条件更好地满足规范要求.研究表明采用闸墙长廊道多支管输水型式是可行的.

Guigang navigation project is located in the Yujiang River reach of the Xijiang River, which is 6. 5 km away upstream of Guigang city. The effective scale of ship lock design is 280 m ×34 m× 5.6m （length x width x doorsill water depth）, and the filling-emptying system adopts the long gallery manifold dispersion form. The design water head is 14. 1 m. Through observation of the hydraulic characteristics of the filling-emptying system, gallery pressure, flow state at the exit and entrance of upstream and downstream, gate chamber, and ships＇ mooring force, we have proposed a reasonable arrangement scheme of upper lock head gallery elevation behind valve, and three open ditches energy dissipation in the gate chamber. And we put an end to the overhaul shaft aeration in the process of water filling, make the distribution of transverse water flow uniform further, and make the berth stability of the designed fleet satisfy the standards. The research results show that the lock＇s long gallery manifold dispersion filling-emptying form is feasible.