长江中游芦家河水道航道维护性疏浚方案

针对近期芦家河水道冲刷过程中的局部卵石淤积碍航问题,分析观测资料并建立平面二维数学模型,提出并论证了航道维护性疏浚方案。结果表明:该水道内的局部卵石淤积主要为冲刷过程中的局部卵石搬运所致;合理控制维护性疏浚的部位和幅度,可改善局部航道条件,同时不会对河段整体冲淤和水流条件产生较大影响。该研究对于三峡坝下沙卵石河段航道维护具有参考价值,对于同类河段的疏浚方案设计具有借鉴意义。

Maintenance dredging scheme of Lujiahe waterway in middle of the Yangtze River

Aiming at the problem of local pebble siltation obstructing navigation during the recent scouring process of Lujiahe,the observation data are analyzed and a two-dimensional mathematical model is established,and the maintenance dredging scheme of the channel is put forward and demonstrated.The results show that the local pebble deposition in the channel is mainly caused by the local pebble transport in the process of scouring,and the local channel conditions can be improved by reasonably controlling the location and extent of maintenance dredging,while the overall scouring and silting and flow conditions of the reach will not be greatly affected.This paper has reference values for channel maintenance of sand-gravel river downstream TGD,and is also helpful for dredging scheme design of similar reach.