长江口12.5 m深水航道运行期维护疏浚效率分析  

Analysis on maintenance dredging efficiency of 12.5 m deep channel in Changjiang Estuary during operation period

作　　者：赵浩程 ZHAO Hao-cheng(CHEC Dredging Co.Ltd., Shanghai 200136, China)

机构地区：[1]中港疏浚有限公司,上海200136

出　　处：《水道港口》2021年第5期664-669,共6页Journal of Waterway and Harbor

基　　金：国家重点研发计划(2018YFB1600400)。

摘　　要：文章以长江口12.5 m深水航道维护疏浚工程为例,利用公式计算和现场船舶资料分析,结合航道回淤特点、疏浚工况条件及疏浚船舶性能等因素研究长江口12.5 m深水航道运行期的维护疏浚效率。通过总结、计算发现维护区段航道回淤量在时间和空间分布上高度集中、深水航道大型船舶通航密度大和贮泥坑使用率低是影响深水航道维护疏浚效率的3个主要因素。该工程根据航道回淤特点合理调配疏浚力量、科学制定疏浚船舶施工计划、增加疏浚土抛坑船次等进行改进,改进后疏浚船舶单船装载量提高约10%,施工时间利用率提高约5%,平均日施工船次提升16%,总体上长江口12.5 m深水航道的维护疏浚效率可提高15%~20%。In this paper,the maintenance and dredging efficiency of the Changjiang Estuary 12.5 m deep water channel during operation period was studied by using formula calculation and site ship data analysis,combined with channel back silting characteristics,dredging conditions and dredging ship performance.Through summing up and calculating,it is found that the three main factors affecting the dredging efficiency of the maintenance channel are the high concentration of silting amount in time and space distribution,the high navigable density of large vessels and the low utilization rate of mud pits.According to the characteristics of channel back silting,the dredging force is rationally allocated,the dredging ship construction plan is scientifically formulated,and the dredging soil dumping ship is added to improve the project.After the improvement,the single ship loading capacity of dredging ship is increased by about 10%,the utilization rate of construction time is increased by about 5%,and the average daily construction ship number is increased by 16%.Overall,the maintenance dredging efficiency of 12.5 m deep waterway in the Yangtze Estuary can be increased by 15%-20%.

关 键 词：长江口12.5 m深水航道 集中回淤 高密度通航 维护疏浚效率 

分 类 号：U641[交通运输工程—船舶及航道工程]