长江南京以下深水航道建设一期工程航道设计参数和乘潮水位利用探讨

Investigation on channel design parameters of deepwater channel phase Ⅰ project of the Yangtze River downstream Nanjing

长江口深水航道建设三期工程已于2010年3月通过交工验收,2010年底将上延至太仓荡茜闸。为充分发挥长江口12.5 m深水航道治理工程的综合效益,尽快实现与长江口12.5 m深水航道无缝对接,实施长江口12.5 m深水航道向上延伸至南通建设工程十分必要,而航道设计参数的确定是航道建设工程的一项重要内容。文章在代表性船型确定的基础上,通过航道设计宽度、水深以及工程区域潮汐特性的分析,确定了航道设计参数。并在此基础上,探讨了一乘和二乘模式下的乘潮概率以及水位利用。航道设计参数的研究为潮位的合理利用、减少疏浚工程量、提高航道通过能力提供了技术支撑。

The deepwater channel construction phase Ⅲ project of the Yangtze estuary has been acceptancechecked in March 2010, the deepwater channel would be extended upward to Dangxi Gate of Taicang by the end of2010. In order to maximize the comprehensive benefits of 12.5 m deepwater channel regulation project andachieved seamless connection with 12.5 m deepwater channel as soon as possible in Yangtze estuary, it is very nec-essary to implement the project of 12.5 m deepwater channel extends upward to Nantong, and an important work isto determine the channel design parameters. Based on the representative ship scale determination, through the anal-ysis of channel design width, depth and tidal characteristics of the project area, the channel design parameters weredetermined in this paper. On the basis of the above studies, tide level use and riding tide probability under one andtwo models were investigated respectively. Navigation standards research can provide technical support for rationaltide level use, dredging amount decrease and channel transit capacity improvement.