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07 Eurocode 7 Soil Characterization - ULS …
30/03/20111 Eurocode 7 Eurocode 7 soil Characterization soil Characterization -- ULS ParametersULS ParametersTony O'Brien, Mott MacDonaldBGA Symposium Eurocode 7 Today and Tomorrow, Cambridge, England, March 2011 background - UK practice shallow foundations, bearing capacity checks sample/lab test methods spatial variability slope engineering EC7 - implications for UK practice (ULS Geo)BGA Symposium Eurocode 7 Today and Tomorrow, Cambridge, England, March 201130/03/20112 Ground Depends on a lot of factors!Parameter selectioninvestigation methodsComplex soil behaviourNature of failure mechanism + consequences of failureCdConstruction processesMethods of analysisSite geologyType of structureSite historyCode requirementsDoes EC7 provide flexibility to make site specific judgements? UK Geology - very complex ground investigation methods-crude ground investigation methods crude British Standards and design guides BS8004: high Factor of Safety (~3) BS8002: critical state for o/c deposits (worst credible, FoS= ) CIRIA C574, Chalk: bearing pressure, qb < yield stress, qy above use simple "ULS Calcs" ensure SLS ok p specific SLS analyses become less critical EC7 - allow for above challenges?
30/03/2011 1 Eurocode 7 Soil Characterization Soil Characterization -- ULS ParametersULS Parameters Tony O'Brien, Mott MacDonald BGA Symposium – Eurocode 7 Today and Tomorrow, Cambridge, England, March 2011
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