长江南京以下12.5m深水航道治理工程落成洲河段整治效果  

Regulation effect of Luochengzhou waterway of 12.5 m deepwater channel of the Yangtze River below Nanjing

作　　者：曲红玲 张冉 马洪亮 QU Hong-ling;ZHANG Ran;MA Hong-liang(China Design Group Co.,Ltd.,Nanjing 210014,China)

机构地区：[1]华设设计集团股份有限公司,江苏南京210014

出　　处：《水运工程》2021年第1期150-155,共6页Port & Waterway Engineering

摘　　要：长江南京以下12.5m深水航道二期工程在落成洲河段采用潜堤、丁坝和护底带等航道整治工程,以防止右汊进一步冲刷发展,增强左汊浅段动力,改善航道条件。为论证落成洲河段整治工程实施后的整治效果,基于实测地形、水文资料,系统对比落成洲河段整治工程实施前后滩槽演变、汊道分流分沙比调整、固滩效果、航道条件改善等。结果表明,工程实施后,落成洲洲头及丁坝掩护区淤积明显,洲头冲刷后退的态势得到有效遏制,左汊分流比增加约4%,丁坝挑流区流速增加0.2m/s左右,航道水深由10.5m提升至12.5m,整治建筑物总体实现整治意图,但须关注三益桥边滩淤长对深水航道的影响。The submerged dike,spur dike and bottom protection zone are applied in the Luochengzhou waterway regulation project on the 12.5 m deepwater channel of the Yangtze River below Nanjing to prevent the right branch from further scouring and development,enhance the power of shallow section of left branch and improve the channel conditions.In order to demonstrate the regulation effect of the implementation of Luochengzhou waterway regulation project,we compare the shoal and channel evolution,the flow and sediment diversion ratios of branched channels,the shoal consolidation effect and the improvement of channel navigation conditions before and after the implementation of the Luochengzhou waterway regulation project based on the measured topographic and hydrological data.The results show that after the implementation of the project,the sediment deposited in the head of sandbar and the shelter area of the spur dike,and the trend of erosion and retreat of the head of sandbar are effectively curbed.The diversion ratio of the left branch increases by about 4%,the velocity of flow in the spur dike's pick-up area increases by about 0.2 m/s,and the water depth increases from 10.5 m to 12.5 m.The regulation aims are achieved in general through the regulation buildings,but attention should be paid to the impact of the deposition at Sanyiqiao marginal bank on the deepwater channel.

关 键 词：长江南京以下12.5m深水航道 整治效果 滩槽演变 通航条件 

分 类 号：U617[交通运输工程—船舶及航道工程]