Pore pressure observation: pressure response of probe penetration and tides

详细信息    查看全文 | 推荐本文 |

英文篇名：Pore pressure observation: pressure response of probe penetration and tides 作者：Tao ; Liu ; Guanli ; Wei ; Hailei ; Kou ; Lei ; Guo 英文作者：Tao Liu;Guanli Wei;Hailei Kou;Lei Guo;Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China;Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao);College of Engineering, Ocean University of China;Qingdao Institute of Marine Geology,China Geological Survey; 英文关键词：pore pressure;;in situ observation;;penetration;;tidal load 中文刊名：SEAE 英文刊名：海洋学报(英文版) 机构：Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Ocean University of China;Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao);College of Engineering, Ocean University of China;Qingdao Institute of Marine Geology,China Geological Survey; 出版日期：2019-07-15 出版单位：Acta Oceanologica Sinica 年：2019 期：v.38 基金：The National Natural Science Foundation of China under contract Nos 41672272 and 41427803;; the Science and Technology Development Project of Shandong,China under contract No.2017GGX30125;; the Guangzhou Marine Geological Survey Entrustment Project under contract No.2017C-03-162 语种：英文; 页：SEAE201907011 页数：7 CN：07 ISSN：11-2056/P 分类号：111-117

摘要

Excess pore water pressure is an important parameter that can be used to analyze certain physical characteristics of sediment. In this paper, the excess pore water pressure of subseafloor sediment and its variation with tidal movement was measured following the installation of a wharf in Qingdao, China by using a fiber Bragg grating(FBG) piezometer. The results indicated that this FBG piezometer is effective in the field. The measured variation of excess pore water pressure after installation is largely explained by the dissipation of excess pore water pressure. The dissipation rate can be used to estimate the horizontal consolidation coefficient, which ranged from1.3×10~(–6) m~2/s to 8.1×10~(–6) m~2/s. The measured values during tidal phases are associated with the variability of tidal pressure on the seafloor and can be used to estimate the compressibility and the permeability of the sediment during tidal movement. The volume compression coefficient estimated from tidal oscillation was approximately2.0×10~(–11) Pa~(–1), which was consistent with the data from the laboratory test. The findings of this paper can provide useful information for in situ investigations of subseafloor sediment.
        Excess pore water pressure is an important parameter that can be used to analyze certain physical characteristics of sediment. In this paper, the excess pore water pressure of subseafloor sediment and its variation with tidal movement was measured following the installation of a wharf in Qingdao, China by using a fiber Bragg grating(FBG) piezometer. The results indicated that this FBG piezometer is effective in the field. The measured variation of excess pore water pressure after installation is largely explained by the dissipation of excess pore water pressure. The dissipation rate can be used to estimate the horizontal consolidation coefficient, which ranged from1.3×10~(–6) m~2/s to 8.1×10~(–6) m~2/s. The measured values during tidal phases are associated with the variability of tidal pressure on the seafloor and can be used to estimate the compressibility and the permeability of the sediment during tidal movement. The volume compression coefficient estimated from tidal oscillation was approximately2.0×10~(–11) Pa~(–1), which was consistent with the data from the laboratory test. The findings of this paper can provide useful information for in situ investigations of subseafloor sediment.

引文

Baligh M M.1986.Undrained deep penetration,II:pore pressures.Géotechnique,36(4):487-501,doi:10.1680/geot.1986.36.4.487
    Bennett R H,Burns J T,Clarke T L,et al.1982.Piezometer probes for assessing effective stress and stability in submarine sediments.In:Saxov S,Nieuwenhuis J K,eds.Marine Slides and Other Mass Movements.Boston,MA:Springer US,129-161
    Bennett R H,Faris J R.1979.Ambient and dynamic pore pressures in fine-grained submarine sediments:Mississippi Delta.Applied Ocean Research,1(3):115-123,doi:10.1016/0141-1187(79)90011-7
    Bennett R H,Hulbert M H,Curry C,et al.2002.In situ permeabilities of selected coastal marine sediments.IEEE Journal of Oceanic Engineering,27(3):571-580,doi:10.1109/JOE.2002.1040939
    Burns S E,Mayne P W.1998.Monotonic and dilatory pore-pressure decay during piezocone tests in clay.Canadian Geotechnical Journal,35(6):1063-1073,doi:10.1139/t98-062
    Davis E E,Horel G C,MacDonald R D,et al.1991.Pore pressures and permeabilities measured in marine sediments with a tethered probe.Journal of Geophysical Research:Solid Earth,96(B4):5975-5984,doi:10.1029/91JB00220
    Hurley M T.1989.Application of Biot's theory to sea-bed sediments[dissertation].Bangor:University of Wales
    Hurley M T,Schultheiss P J.1990.Sea-bed shear moduli from measurements of tidally induced pore pressures.In:Hovem J M,Richardson M D,Stoll R D,eds.Shear Waves in Marine Sediments.Dordrecht:Springer,411-418
    Lai J Y,Richards A F,Keller G H.1968.In-place measurement of excess pore water pressure of gulf of main clays.San Francisco:American Geophysical Union Transactions
    Li Bo.2007.Study on cavity expansion and its applications to cone penetration test(in Chinese)[dissertation].Dalian:Dalian University of Technology
    Li Hongli.2015.Application of Fiber Bragg Grating sensor in the monitoring of seabed excess pore water pressure(in Chinese)[dissertation].Qingdao:Ocean University of China
    Liu Tao,Cui Feng,Zhang Meixin.2015.Research progress of deep seabed pore pressure observation techniques in situ.Journal of Hydraulic Engineering(in Chinese),46(S1):111-116
    Liu Tao,Zhou Lei,Kou Hailei,et al.2018.Model test of stratum failure and pore pressure variation induced by THF hydrate dissociation.Marine Georesources&Geotechnology,1-8,doi:10.1080/1064119X.2018.1458167
    McPhail S D,Schultheiss P J.1986.PUPPI-a free-fall seabed piezometer for geotechnical studies.In:Oceanology.Dordrecht:Springer,249-258
    Richards A F,?ten K,Keller G H,et al.1975.Differential piezometer probe for an in situ measurement of sea-floor.Géotechnique,25(2):229-238,doi:10.1680/geot.1975.25.2.229
    Schultheiss P J.1990.Pore pressures in marine sediments:An overview of measurement techniques and some geological and engineering applications.Marine Geophysical Researches,12(1-2):153-168,doi:10.1007/BF00310570
    Schultheiss P J,McPhail S D.1986.Direct indication of pore-water advection from pore pressure measurements in Madeira Abyssal Plain sediments.Nature,320(6060):348-350,doi:10.1038/320348a0
    Sills G C,Nageswaran S.1984.Compressibility of gassy soil.In:Spearhead Exhibitions,Ltd,ed.Oceanology International.Brighton:Society for Underwater Technology,1-26
    Sultan N,Bohrmann G,Ruffine L,et al.2014.Pockmark formation and evolution in deep water Nigeria:Rapid hydrate growth versus slow hydrate dissolution.Journal of Geophysical Research:Solid Earth,119(4):2679-2694,doi:10.1002/2013JB010546
    Sultan N,Cattaneo A,Sibuet J C,et al.2009.Deep sea in situ excess pore pressure and sediment deformation off NW Sumatra and its relation with the December 26,2004 Great Sumatra-Andaman Earthquake.International Journal of Earth Sciences,98(4):823-837,doi:10.1007/s00531-008-0334-z
    Sultan N,Lafuerza S.2013.In situ equilibrium pore-water pressures derived from partial piezoprobe dissipation tests in marine sediments.Canadian Geotechnical Journal,50(12):1294-1305,doi:10.1139/cgj-2013-0062
    Sultan N,Voisset M,Marsset B,et al.2007.Potential role of compressional structures in generating submarine slope failures in the Niger Delta.Marine Geology,2007,237(3-4):169-190
    Terzaghi K.1943.Theoretical Soil Mechanics.New York:John Wiley and Sons,25-32
    Urgeles R,Canals M,Roberts J,et al.2000.Fluid flow from pore pressure measurements off La Palma,Canary Islands.Journal of Volcanology and Geothermal Research,2000,101(3-4):253-271
    Vanneste M,Sultan N,Garziglia S,et al.2014.Seafloor instabilities and sediment deformation processes:The need for integrated,multi-disciplinary investigations.Marine Geology,352:183-214,doi:10.1016/j.margeo.2014.01.005
    Ye Yincan.2011.Review of the development of marine hazard geology and its future prospects.Journal of Marine Sciences(in Chinese),29(4):1-7