福姜沙北水道12.5 m深水航道疏浚方案的难点与对策

福姜沙北水道作为长江南京以下12.5 m深水航道二期工程重点疏浚河段,易受上游靖江边滩冲刷沙体过境的影响,河势变化较为复杂。针对疏浚方案中存在的掉头区布置、运泥线路选择及艏吹点布设等难点,对施工条件、通航法规、施工效率、施工安全及经济合理性等进行研究。采用理论计算与施工经验相结合的方法,提出解决对策,从而完善了福姜沙北水道12.5 m疏浚方案,也可为今后长江内河疏浚施工提供借鉴。

Difficulties and countermeasures of dredging scheme for 12.5 m deepwater channel of north Fujiangsha waterway

As the key section of dredging in the second phase of the 12.5 m deepwater channel of the Yangtze River below Nanjing city,North Fujiangsha waterway is easy to be affected by the erosion of the sand and the sand in the upper reaches of the Jingjiang shoal,and the changes of river regime are complex.Aiming at the difficulties in the turning area layout,mud line layout and bow blowing,we carry out a research on the construction condition,navigation regulations,construction efficiency,construction safety,as well as the economic rationality,etc.Combining theoretical calculation and practical construction experience,we put forward countermeasures,so as to optimize the north Fujiangsha waterway 12.5 m dredging scheme and meanwhile provide reference for the inland river dredging construction of the Yangtze River in the future.