海洋地质前沿2025，Vol.41Issue(4)：37-46,10.DOI:10.16028/j.1009-2722.2025.042
南汇南滩波致海床响应与液化研究
Study on seabed response and liquefaction induced by waves in the southern tidal flat of Nanhui,Shanghai
摘要
Abstract
Seabed liquefaction is a common phenomenon in marine geological disasters,which not only leads to seabed erosion but also poses significant risks to subsea pipelines,marine facilities,and other structures in the area.At present,available studies on the mechanisms of seabed liquefaction is based mainly on indoor physical model experiments,and the field observations are very scarce.In this study,we conducted a one-month field ob-servation at the southern tidal flat of Nanhui,Shanghai.An acoustic Doppler velocimeter was mounted at the fixed platform to obtain high-frequency data of flow velocity and water pressure.A self-made pore pressure probe was applied to collect pore pressure data at different depths of the seabed sediments.In addition,we analyzed the re-sponse characteristics of pore pressure to wave loading during a winter gale event and calculated the depth of seabed liquefaction.Results show that the characteristics of pore pressure response are affected by tidal level and wave height,of which the trend of total pore pressure response is affected by tidal levels,and the amplitude of wave-induced pore pressure response is affected by significant wave height.The degree of seabed liquefaction in the study area decreased with depth increase.Due to the relatively low significant wave height during the observa-tion period,the liquefaction depth was only a dozen centimeters.关键词
海床液化/孔隙水压力/有效应力/南汇南滩/滞后效应Key words
seabed liquefaction/pore pressure/effective stress/the southern tidal flat of Nanhui/lag effect分类
海洋学引用本文复制引用
张敬邦,范代读,孟令鹏,崔明慧,徐昌伟,涂俊彪..南汇南滩波致海床响应与液化研究[J].海洋地质前沿,2025,41(4):37-46,10.基金项目
国家自然科学基金重点项目(42330411) （42330411）
上海市教委科研创新计划自然科学重大项目(2021-01-07-00-07-E00093) （2021-01-07-00-07-E00093）
亚洲合作资金项目"长江三角洲与红河三角洲海洋地质环境与灾害合作研究" （）
