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Dominant factors in minicone, CPT and pile correlations: A data‐based approach

Deep Underground Science and Engineering 2023年第4期2卷 346-358页

作者： Seyed Sajad Shirani Abolfazl Eslami Amirhossein Ebrahimipour Moses Karakouzian Department of Civil and Environmental Engineering Amirkabir University of Technology(AUT)(Tehran Polytechnic)TehranIran University of California San Diego San DiegoCaliforniaUSA Department of Civil and Environmental Engineering and Construction University of NevadaLas VegasNevadaUSA

The cone penetration test(CPT)contributes to the design and analysis of piles regarding geometry,installation effect,and pile capacity(shaft and toe resistance).minicone,as an alternative to CPT sounding,has been used to carry outﬁeld and laboratory investigations by physical modeling.More tests can be practically carried out through light equipment and small soil mass,involving fewer errors caused by boundary conditions.Furthermore,it can be used for in situ testing,such as quality control,assessment of ground improvement,and subgrade characterization.A database comprising minicone and CPT records inﬁeld and physical modeling is proposed with a variety of cone diameters.The case study records in the database have been obtained from 140 tests compiled from data from 26 sources.The sources include the results of 20 physical modelings andﬁeld data from six sites in 10 countries.The data comprise minicone and CPT cone tip resistance(qc),and sleeve friction(fs).The different cones are used in sandy,silty sand,and clayey soils via simple chambers(1 g),calibration chambers,and frustum conﬁning vessels.In addition,correlations were found in penetration records in terms of physical modeling types,cone diameters,penetration rates,and soil densities.Moreover,qc and fs are related to capacities of pile toes and shafts using proper correlation coefﬁcients less than unity,respectively.Correlations and dominant factors in geotechnical practice between minicone,CPT,and pile have been reviewed and discussed.

关键词： correlations CPT database dominant factors minicone pile

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