Unformatted text preview: • sum the layer contributions n n Q s = IQ sI = IfslA s ! i=1 i=1 o End Bearing: • use the design method appropriate for the bearing layer • weak layers within BB above toe and 3·5B below toe will affect bearing capacity • for sands the critical depth limitation applies starting at top of bearing layer (D, measured from top of bearing layer not the soil surface) o Drained V5. Undrained: • do not mix drainage behavior in same analysis, all layers are drained or all layers are undrained (use effective stress analysis for sands in either case) • use drained analyses for unsaturated soils a Example Side Shear Profiles: I Q 1 (for Clay at toe)...
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- Fall '08
- Geotechnical Engineering, critical depth limitation