凌津滩枢纽船闸下游近坝段航道整治研究

沅水梯级渠化最末一级凌津滩枢纽建成后,船闸下游引航道口门以下现行航道弯曲分汊、水浅流急、航道易淤积,船舶进出船闸困难,严重影响枢纽通航功能的发挥;在分析近坝河段航道碍航原因的基础上,通过水流和遥控自航船模、定床输沙物理模型试验,分别对左、右航线不同的工程整治方案进行研究优化;通过综合对比分析,废弃现行左线航道,选择右线开辟新航道,并针对存在的问题提出相关对策。

Study on near-dam reach waterway regulation of the downstream channel of Lingjintan hydro-junction

After the completion of the Lingjintan hydro-junction,many factors of lock downstream approach channel such as the curved and braided waterway,shallow but torrent flow,channel siltation lead to difficulty for ships in entering and leaving a ship lock and severely affect the navigation condition.According to the water flow,remote-controlled self-propelled ship model and the fixed-bed physical model test,the optimization schemes of engineering projects including left and right waterway line are analysed separately on the basis of the causes of near-dam reach navigation obstruction.After comprehensive comparison,the right line of waterway is chosen to open a new channel while the left line is abandoned.Based on the research results of existed Lingjintan hydro-junction,some understanding of plan layout is proposed.