S - Kam Ng PhD Dissertation Final.pdf - Digital Repository of CCEE ...

Depth below ground (m)Depth below ground (m)Shaft Damping Factor, Js (s/m)Depth below ground (m)Depth below ground (m)28000224466881010121214141616SPT N-value0 5 10 15SPT N-value20 250 5 10 15Fill (ML/SC) 20 25GWTGWTSC/CLSC/CLMixed (SC-ML)CLCLCLCL18SPT N-value18Damping Factor (Proposed)Damping Factor (AC) (Default)200.00 0 0.50 0.5 1.001 1.50 1.5 2.00 2Shaft Damping Factor, J s (s/m) Js (s/m)SPT N-value18Shaft Quake (Proposed)Shaft Quake (AC)200 1 2 2 3 3 4 4 5 566Shaft Quake, q s (mm) qs (mm)(a) J s versus SPT N-value(b) q s versus SPT N-valueFigure 7.7: SPT N-values versus (a) shaft damping factors; and (b) shaft quake values alongthe embedded pile length of ISU500224466881010121214 1416 16SPT N-value0 5 10 15SPT N-value20 250 5 10 15 20Fill (ML/SC)25Mixed (SC-ML)GWTGWTCL/SCSC/CLCLCLCLCL1.401.201.00Liang (2000)Smith (1962)Hannigan et al. (1998)All Sites-EODISU5 & ISU6-BOR (8 to 10 days)J s = 0.0052 N 1.7327R² = 0.8024 (BOR)0.800.600.400.20J s = 0.016 N 1.1838R² = 0.8253 (EOD)Robert Liang (2000), J s =2.089 N62.5 + N0.000 2 4 6 8 10 12 14 16 18 20 22 24 26SPT N-valueFigure 7.8: Relationship between shaft damping factor for cohesive soils and SPT N-value