摘要
东平水道整治河段位于珠江西、北两江交汇区，不同类型浅滩多，水流条件复杂，而且是行洪干道之一，整治难度很大。在掌握大量原型水文和河道地形资料基础上，进行水动力条件、来水来沙条件和河床演变分析，结合模型试验研究，揭示浅滩成因和形成机理，采取有针对性的整治工程，使东平水道航道整治取得良好效果。其中对老鸦洲浅滩回流淤积问题，采取建丁坝改变分流点位五、消除浅滩回流、破坏浅滩淤积条件的整治工程措施，整治后浅滩消失，航道畅通；对思贤西口航道的“险”和“浅”的问题，在支汊建低锁坝限制水流和过坝水流冲沙治浅的工程措施，既消除了“险”情，又缓解了“浅”患。整治后，东平水道全线水深从不足2．0m增至2．5m以上，能通航1000t级船队，而且有利于泄洪林涝，取得显著的经济效益和社会效益。
Located in the region where the West River meets with the North River, the reach of Dengping Waterway under regulation is one of flood carrying courses with great difficulties for regulation due to a number of sheds of various types and complicated flow condition. On the basis of plenty of full scale hydrologic and topographic data,analysis of hydrodynamic conditions, conditions of inflow and incoming sediment and also riverbed evoution has been carried out in combination with model tests to reveal the formation causes and mechanism of shoals so that oriented regulation work could be taken to achieve gdri results. For the siltation of Laoyazhou Shal due to backflow, engineering measures such as building groynes to change the location of bifurcationpoints,eliminating backflow at the shoal and violating the conditions for shoaling have been taken. After regulatha, the shoal disappeared and the channel became unblocked. For the rapid and shallow west outlet of Sixianjiso,fow blocking dams have been built both to limit the flow and scour the sediment with the help of the flow passing through the darn to deepen the channel. The depth of Dengping Waterway has increased from less than 2. 0m t0 over 2. 5m, navigable for fleets of 1000 t and beneficial to flood disposal, thus achieving significant economic and social benefits.
出处
《人民珠江》
1999年第6期7-12,共6页
Pearl River
关键词
航道整治
试验研究
东平水道
珠江
channel regulation experimental study Dongping Waterway Pearl River
