跨江大桥对天星洲尾演变的影响及护滩对策  

Influence of river crossing bridge on evolution of Tianxingzhou tail and beach protection countermeasures

作　　者：胡守增[1] 张磊[1,2,3] 沈孔健 吴启和 HU Shouzeng;ZHANG Lei;SHEN Kongjian;WU Qihe(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan 430040,China;Key Laboratory of Large-span Bridge Construction Technology,Wuhan 430040,China;Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure,Wuhan 430040,China;Jiangsu Provincial Transportation Engineering Construction Bureau,Nanjing 210004,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [3]交通运输行业交通基础设施智能制造技术研发中心,湖北武汉430040 [4]江苏省交通工程建设局,江苏南京210004

出　　处：《水运工程》2023年第11期158-163,共6页Port & Waterway Engineering

摘　　要：天星洲是长江下游的江心洲,拟建常泰长江大桥北侧桥墩布设与天星洲尾相毗邻。通过物理模型试验,研究常泰长江大桥的建设对天星洲尾演变的影响。结果表明,常泰长江大桥建设后,天星洲尾冲刷幅度较工程前有所增加,不利于天星洲夹槽的稳定,需要对天星洲尾进行护滩守护。与潜堤高程较高的护滩方案相比,低潜堤方案引起天星洲沙尾附近流速增幅稍小,幅度一般在0.03 m/s以内,引起天星洲夹槽流速减幅稍小,幅度一般在0.02 m/s以内,更有利于天星洲尾的稳定和七圩临时航道的水深维护。工程实施可守护天星洲尾,七圩临时航道桥位下游附近略有冲刷,有利于航道水深维护。Tianxingzhou is a central bar of the lower reaches of the Yangtze River.The piers on the north side of the proposed Changtai Yangtze River Bridge are arranged adjacent to the tail of Tianxingzhou.We carry out physical model tests to study the influence of Changtai Yangtze River Bridge construction on Tianxingzhou tail evolution.The results show that after the construction of Changtai Yangtze River Bridge,the scouring range of Tianxingzhou tail is increased compared with that before the project.This is not conducive to the stability of Tianxingzhou slot,so it is necessary to protect the beach at Tianxingzhou tail.Compared with the beach protection scheme with higher submerged dike elevation,the low submerged dike scheme causes a slightly smaller increase(within 0.03 m s)in velocity near the Tianxingzhou tail and a slightly smaller decrease(within 0.02 m s)in velocity in the Tianxingzhou slot,which is more conducive to the stability of Tianxingzhou tail and the water depth maintenance of the temporary channel of Qiwei.The implementation of the project can protect Tianxingzhou tail,and there is slight scouring near the downstream of the bridge site of the temporary channel of Qiwei,which is conducive to the maintenance of the water depth of the channel.

关 键 词：跨江大桥 天星洲尾演变 物理模型试验 护滩对策 护滩效果 

分 类 号：U617.8[交通运输工程—船舶及航道工程] TV853[交通运输工程—船舶与海洋工程]