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    Hydraulic Conductivity Measurement from On-the-Fly uCPT Sounding and from VisCPT

    Source: Journal of Geotechnical and Geoenvironmental Engineering:;2008:;Volume ( 134 ):;issue: 012
    Author:
    Dae Sung Lee
    ,
    Derek Elsworth
    ,
    Roman Hryciw
    DOI: 10.1061/(ASCE)1090-0241(2008)134:12(1720)
    Publisher: American Society of Civil Engineers
    Abstract: Detailed profiles of hydraulic conductivity are recovered from the deployment of direct-push permeameters at the Geohydrologic Experimental and Monitoring Site, Kansas. Measurements with thin tapered tips, and with standard cone penetration test (uCPT) tips, show only minor differences, suggesting that tip-local disturbance effects are small, and that routine uCPT measurements are therefore representative of pristine conditions. Permeameter measurements are correlated against closely deployed uCPT measurements, estimates of hydraulic conductivity from uCPT sounding correlations, and from grain size correlations derived from both vision CPT (VisCPT) and from cone metrics. On-the-fly evaluations of hydraulic conductivity require that the tip-local pressure field is both steady and partially drained. Continuous penetration is shown to yield pore pressures sufficiently close to steady to enable conductivities to be directly determined. Cone metrics of cone resistance, sleeve friction, and pore pressure ratio are shown to be sufficient to discriminate between partially drained and undrained behavior, and therefore to define the permissible regime where conductivities may be determined from uCPT sounding data. Estimates of hydraulic conductivities from uCPT sounding data are shown to correlate with independently measured magnitudes of hydraulic conductivity recovered using the permeameter tests. However, most of hydraulic conductivities from the permeameter tests (
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      Hydraulic Conductivity Measurement from On-the-Fly uCPT Sounding and from VisCPT

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    contributor authorDae Sung Lee
    contributor authorDerek Elsworth
    contributor authorRoman Hryciw
    date accessioned2017-05-08T21:29:08Z
    date available2017-05-08T21:29:08Z
    date copyrightDecember 2008
    date issued2008
    identifier other%28asce%291090-0241%282008%29134%3A12%281720%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/53265
    description abstractDetailed profiles of hydraulic conductivity are recovered from the deployment of direct-push permeameters at the Geohydrologic Experimental and Monitoring Site, Kansas. Measurements with thin tapered tips, and with standard cone penetration test (uCPT) tips, show only minor differences, suggesting that tip-local disturbance effects are small, and that routine uCPT measurements are therefore representative of pristine conditions. Permeameter measurements are correlated against closely deployed uCPT measurements, estimates of hydraulic conductivity from uCPT sounding correlations, and from grain size correlations derived from both vision CPT (VisCPT) and from cone metrics. On-the-fly evaluations of hydraulic conductivity require that the tip-local pressure field is both steady and partially drained. Continuous penetration is shown to yield pore pressures sufficiently close to steady to enable conductivities to be directly determined. Cone metrics of cone resistance, sleeve friction, and pore pressure ratio are shown to be sufficient to discriminate between partially drained and undrained behavior, and therefore to define the permissible regime where conductivities may be determined from uCPT sounding data. Estimates of hydraulic conductivities from uCPT sounding data are shown to correlate with independently measured magnitudes of hydraulic conductivity recovered using the permeameter tests. However, most of hydraulic conductivities from the permeameter tests (
    publisherAmerican Society of Civil Engineers
    titleHydraulic Conductivity Measurement from On-the-Fly uCPT Sounding and from VisCPT
    typeJournal Paper
    journal volume134
    journal issue12
    journal titleJournal of Geotechnical and Geoenvironmental Engineering
    identifier doi10.1061/(ASCE)1090-0241(2008)134:12(1720)
    treeJournal of Geotechnical and Geoenvironmental Engineering:;2008:;Volume ( 134 ):;issue: 012
    contenttypeFulltext
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