174_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

174_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 - as...

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DF44 Drilled Shaft Example, Sand No static test Uniform Site Average site investigation therefore FS = 3.0 2.0m 1.5 m Silty Sand, 'Ym = 17 kN/m 3 , 'Ysat = 20 kN/m 3 'Yw = 9.81 kN/m 3 10.5 m Well graded Sand, 'Ysat = 20 kN/m 3 , Avg. N 60 1.2 m below toe = 22 blows/0.3m bearing: pile weight: I' \ W ~6 kN/m 3 (2m) + (23.6-9.81 kN/m"l(12 m)] x II (0.6 m)2/4] ~ 60.1 kN qt = 51. S" (~~ ~/DWS/O')I"\) = I'lL £" "f~ At = 1t Bb2/4 = 1t (0.p)2/4 = 0.283 m 2 at = I:L ,S" kP", lb. '1 'i ~,., l) -= '3 5'"8 kN side shear: use ~ method, Ifs = 13 a 'YI where 13 = 1.5 - O.245..jz,mr l <l) "'tI JA- ( L 1~P' I .. f Depth Thickness a'y f s = ~(J'y As=1t~{J as = fsA s Layer C.L. m kPa ~ kPa 2 /
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Unformatted text preview: as = fsA s Layer C.L. m kPa ~ kPa 2 / kN m m Silty Sand J (11 k"J",~) 1.9. .0 above GWT 1.0 2.0 17.0 ?o.~ "S.t-"+ ~l (0-2 m) I po . ... It) Silty Sand ';).ll1k1,. .\)~ belowGWT 2.75 1.5 41.6 ). 0" L{ s-. ~ ~.~3 ,~~ (2-3.5 m) o,l-S Q-0-'J.J~ Sand 6.25 5.5 77.3 O.~<g 6~. 10. "Si- -:} () 5 (3.5-9m) Sand 11.5 5.0 130.9 0, 6~ ~" 1,Lfl-i38 (9-14 m) Las l"1-tlg-allowable load: P a = ?' ~:::'i.Qs-\-~-rs. It L./f \-35"8-60., ~·O...
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