THE ENGINEERING OF FOUNDATIONS A BOOK BY RODRIGO SALGADO POWERPOINT RESOURCES FOR CHAPTER 9 Contains copyrighted material.

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THE ENGINEERING OF FOUNDATIONS A BOOK BY RODRIGO SALGADO POWERPOINT RESOURCES FOR CHAPTER 9 Contains copyrighted material

TYPES OF SETTLEMENT

Sands x Clays Sands: Clays: Du=0 Du>0 Large hydraulic conductivity negligible Sands: Large hydraulic conductivity Excess pore pressure Du dissipates fast Settlement due to both distortion and compression (volumetric) of the soil mass Clays: Settlement due to distortion only (no volume change) Settlement due to consolidation (volume change) and creep Du>0 Small hydraulic conductivity Excess pore pressure generation Long-term settlement occurs as result of the dissipation of the excess pore pressures generated by the load application

INFLUENCE OF FOUNDATION STIFFNESS

SETTLEMENT EQUATIONS FROM ELASTICITY THEORY

SETTLEMENT OF SHALLOW FOUNDATIONS ON SAND

CPT-based method Schmertmann (1970)

CPT-based method Schmertmann (1970)

CPT-based method Schmertmann (1970) For zf < zfp For zfp ≤ zf ≤ zf0

CPT-based method Schmertmann (1970) Layer i 1 2 3 ………..

SETTLEMENT OF SHALLOW FOUNDATIONS ON CLAY