西江长洲水利枢纽至界首河段航道碍航分析及整治措施

Analysis of channel obstruction from Changzhou water control project to Jieshou reach and its regulation measures

针对西江航运干线长洲水利枢纽至界首河段枯水期航道碍航问题,收集近年来实测的水文和地形图资料进行研究。通过对工程河段进行水文特性和河床演变分析,得知水位普遍下降与航道冲淤变化是引起枯水期航道水深不足的主要原因,弯道横流对船舶航行安全也有影响,为此针对性提出疏浚炸礁、回填深槽、调顺航线等工程措施。平面二维水流数学模型研究结果表明,实施航道整治以后,航道水深和流态得到改善。研究思路和成果可为类似工程提供借鉴。

Aiming at the waterway obstruction problem during the dry season of the Changzhou Water Conservancy Hub to the Jieshou River section of the Xijiang Shipping Trunk Line,we collect the hydrological and topographic map data in recent years to study the cause.The analysis of the hydrological characteristics and bed evolution of the engineering section reveals that the general decrease in water level and the change of channel erosion and siltation are the main reasons for the insufficient water depth of the channel during the dry season.The cross-flow of the curve also has an impact on the navigation safety of the ship.Engineering measures such as dredging and reefing,backfilling deep trenches,and smoothing the route are proposed.The study of the mathematical model of dimensional water flow shows that the water depth and flow pattern of the waterway have been improved after implementation of the channel regulation.The research ideas and results can provide reference for similar projects.