Empirical Model for Estimating Compression Index from Physical Properties of Weathered Birimian Phyllites

Electronic journal of geotechnical engineering

Dr. CFA Akayuli, Bernard Ofosu¹ 

[1] CSIR-Building and Road Research InstituteGeotechnical Engineering Division P.O.Box 40, KNUST-Kumasi, Gh

关键词: Compression index;    Liquid limit;    linear regression Birimian Phyllites.;   

DOI  :  

来源: Oklahoma State University

【 摘 要 】

Geotechnicalinvestigationisrequiredforthedeterminationofgroundparametersforsafeandeconomicdesignofcivilengineeringstructures.Compressionindexisoneofthesoilparametersthatarerequiredforcalculationoffoundationsettlements,however,thedeterminationofcompressionindexisexpensive,cumbersome,timeconsumingandrequiredalotofexperienceforobtainingundisturbedsoilsamplesfromthefield.Inordertomitigatethesecomplexities,equationshavebeendevelopedbymanyresearchersinthepasttopredictcompressionindexusingindexpropertiesofsoilwhicharerelativelyeasiertoconductinthelaboratory.LinearregressionanalysiswasusedtoestablishedempiricalmodelsrelatingcompressionindexandindexpropertiesofsixtyweatheredBirimianphyllitessamplesintheKumasiarea.Basedontheanalysis,theliquidlimitresultedinthemodelwiththehighestcoefficientofdeterminationcomparedtothemoisturecontent,plasticityindex,andplasticlimit.Theresultingmodelwasusedtopredictthecompressionindexofaboutthirtysamplesthatwerenotusedintheregressionanalysis;theresultsshowedthat,themodelisabletopredictthecompressionindexwithlesserror.Theempiricalmodel(Cc=0.004LL–0.03)involvingtheliquidlimitisrecommendedforpredictionofcompressionindexforpreliminarydesignandverificationofthelaboratorytestssoilsinKumasiwithintheBirimianphyllites.

【 授权许可】

Unknown