摘要
长江中游航道具有水文变幅大、河床冲淤多变、江湖关系复杂等特点,导致疏浚时机较难确定.揭示了航道疏浚时机的影响因素,建立了疏浚时机的确定方法.结果表明,疏浚时机的主要影响因素包括水位过程、河床冲淤、疏浚能力以及通航状态等,同时给出疏浚设计水位、维护水深、预留水深、船舶展臂最大水下竖直深度、疏浚量、疏浚效率等参数取值及基于此类参数的疏浚时机确定方法.以 2023 年太平口水道养护疏浚为例,分析 2018-2022 年水位过程,综合确定最佳疏浚时机为 2023 年 9 月初—10 月底.研究成果可为类似航道疏浚提供技术支撑.
Abstract
The waterway in the middle reaches of the Yangtze River has the characteristics of large hydrological variation,variable riverbed erosion and sedimentation,and complex river and lake relationships,making it difficult to determine the dredging timing.This paper reveals the factors affecting the dredging timing and establishes a method to determine the dredging timing.The results show that the main influencing factors of dredging timing include water level process,riverbed erosion and sedimentation,dredging capacity,and navigation status.At the same time,the values of parameters such as dredging design water level,maintenance water depth,reserved water depth,maximum underwater vertical depth of ship arm extension,dredging volume,dredging efficiency are given,and the method for determining dredging timing based on these parameters is determined.Taking the maintenance dredging of Taipingkou waterway in 2023 as an example,the water-level process from 2018 to 2022 is analyzed.The optimal dredging timing is from early September to the end of October in 2023.The research results can provide technical support for the dredging of similar waterways.
基金项目
国家重点研发计划项目(2022YFC3203404)
国家自然科学基金项目(U2340217)
NETL
NSTL
万方数据