长江上游天然河段养护疏浚施工方式分析

Maintenance and dredging methods of natural rivers in upper Yangtze River

长江重庆江津至宜宾河段以滩多、流急、流态紊乱著称,三峡工程蓄水运行以来该段不受回水影响呈现山区天然河流特征,因浅滩众多,每年均需要进行养护疏浚才能保障航道畅通。对于兼具"弯、窄、险、急"特征的滩险,在枯水期进行疏浚时,施工难度较大,过往船舶航行困难,施工船舶自身安全隐患大,施工与通航矛盾突出,因此在实施养护工作中采用提前疏浚、着重缓解施工与通航矛盾等手段进行施工。对近年航道养护实施情况进行总结,为今后长江上游航道养护疏浚工作提供参考。

In upper Yangtze River between Chongqing and Yibin, there are many reaches of shoal ＆ rapids and flow disorder, which is not affected by the back water and has the mountain natural river characteristics since the regulation of Three Gorges Reservoir. There are many shoals, and it needs maintenance and dredging every year to keep the channel safe and unblocked. It is difficult to dredge and sail in the dry season, and it is dangerous for the construction ship, so there is an obvious contradiction between dredging dredging in advance and easing the contradiction between construction maintenance. This paper concludes the experience about maintenance and navigation. Therefore the means of and navigation is taken during the dredging for many years to serve as reference for the future.