doi:

DOI: 10.3724/SP.J.1140.2013.06029

Marine Geology & Quaternary Geology (海洋地质与第四纪地质杂志) 2013/33:6 PP.29-40

STORM-WAVES-INDUCED SEABED SEDIMENT LIQUEFACTION AND RE-STRATIFICATION ON THE YELLOW RIVER SUBAQUEOUS DELTA


Abstract:
There are many collapse depressions at the Yellow River subaqueous Delta,of which the inner strata show disturbed structures.Through engineering geological investigation in the disturbed strata in depressions,particle size,bulk density,water content and soil strength of the sediments were collected,as well as features of the shallow-stratum acoustics profiles.In laboratory,flume experiments were carried out using the silty soil taken from the Yellow River delta for bottom bed.An engineering strata configuration similar to the disturbed stratum at the Yellow River subaqueous Delta was formed on the bed when it was liquefied and movable.It is concluded that liquefaction and movement of the silty seabed were caused by strong waves during the storm,leading to differentiation of sediments granularity and then in-situ restratification.Structural features of the storm deposited strata in-situ,formed by wave-induced liquefaction and movement,were also put forward.

Key words:storm deposits,liquefaction,re-stratification,the Yellow River subaqueous delta

ReleaseDate:2016-08-31 18:47:05



[1] Foda M A,Tzang S Y.Resonant fluidization of silty soil by water waves[J].Geophysical Research,1994,99(10): 20264-20475. [2] Tzang S Y,Ou S H.Laboratory flume studies on monochro-matic wave-fine sandy bed interactions Part 1.Soil fluidization [J].Coastal Engineering,2006,53:965-982. [3] Xu G H,Sun Y F,Wang X,et al.Wave-induced shallow slides and their features on the subaqueous Yellow River delta [J].Canadian Geotechnical Journal,2009,46(12):1406-1417. [4] 杨少丽,沈渭铨,杨作升.波浪作用下海底粉砂液化的机理分 析[J].岩土工程学报,1995, 17(4):28-37.[YANG Shaoli, SHEN Weiquan,YANG Zuosheng.The mechanism analysis of seafloor silt liquefaction under wave loads[J].Chinese Journal of Geotechnical Engineering,1995,17(4):28-37.] [5] 林缅.波浪作用下粉土特性分析[J].中国科学:E辑,2001,31 (1):86-96.[LIN Mian.Analysis of wave-induced response in silty seabed[J].Science in China(Series E),2001,31(1):86-96.] [6] 潘冬子,王立忠,潘存鸿.粉质海床波浪响应的数值模拟及试 验研究[J].岩土力学,2008, 29(10):2697-2707.[PAN Dongzi,WANG Lizhong,PAN Cunhong.Numerical simula-tion and experimental investigation of wave-induced response in silty seabed[J].Rock and Soil Mechanics,2008,29(10):2697-2707.] [7] Prior D B,Yang Z S,Bornhold B D,et al.Active slope fail-ure,sediment collapse and silt flows on the modern subaque-ous Huanghe delta[J].Geo-marine Letters,1986,6:85-95. [8] Prior D B,Suhayda J N,Lu N Z,et al.Storm wave reactiva-tion of a submarine landslide[J].Nature,1989,341(6237): 47-50. [9] Keller G H,Prior D B.Sediment dynamics of the Huanghe (Yellow River)delta and neighboring Gulf of Bohai[J].Geo-marine Letters,1986,6:63-66. [10] 杨作升,陈卫民,陈彰榕,等.黄河口水下滑坡体系[J] .海 洋与湖沼,1994,25(6):573-581.[YANG Zuosheng,CHEN Weimin,CHEN Zhangrong,et al.Subaqueous landslide sys-tem in the Huanghe River(Yellow River)Delta[J].Oceano-logia et Limnologia Sinica,1994,25(6):573-581.] [11] 陈卫民,杨作升,Prior D B,等.黄河口水下底坡微地貌及 其成因探讨[J].青岛海洋大学学报,1992,22(1):71-80. [CHEN Weimin,YANG Zuosheng,Prior D B.The classifi-cation and analysis of seafloor micromorphology on the Huanghe River subaqueous slope[J].Journal of Ocean Uni-versity of Qingdao,1992,22(1):71-80.] [12] 陈卫民,杨作升,Prior D B,等.老黄河口水下底坡不稳定 性的研究[C]//广州国际海洋工程地质讨论会文集.北京:地 93 质出版社,1994:237-249.[CHEN Weimin,YANG Zuosh-eng,Prior D B,et al.The Study of Subaqueous Slope Insta-bility of Old Huanghe Delta [C]//Literal Selections of United Nations Meeting on Marine Engineering Geological Survey for Petroleum Development in Developing Countries.Geology Press,1994:237-249.] [13] 孙永福,胡光海,宋玉鹏,等.埕岛油田灾害地质研究成果 报告[R].国家海洋局第一海洋研究所, 2006.[SUN Yong-fu,HU Guanghai,SONG Yupeng,et al.The result report of research on disaster geology in Chengdao oil field[R].The First Institute of Oceanography,SOA,China,2006.] [14] 许国辉,贾永刚,郑建国,等.黄河水下三角洲塌陷凹坑构 造形成的水槽试验研究[J].海洋地质与第四纪地质,2004, 24(3):37-40.[XU Guohui,JIA Yonggang,ZHENG Jian-guo, et al.Flume test formed by collapse in the Yellow River subaqueous delta[J].Marine Geology and Quaternary Geolo-gy,2004,24(3):37-40.