139_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011

139_CEG 4012 Notes Fall 2011 CEG 4012 Notes Fall 2011 -...

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DF25 Since the overlying (air) is weaker than the bearing layer and the embedment depth DA > Dc, only the skin friction between the top of the bearing layer and the critical depth is corrected: USFACD CSFACD = [qLC + 0.5(qed. qLC)] qed USFACD = fsA s = (0.267tsf)(18')(2'4) = 38.48 tons qaB = 0 q3.SB = [5'(0+16 tsf)/2 + 2'(16 tsf)] 1 7' = 10.29 tsf qLC = Q3.SB = 10.29 tsf (note: FB Deep uses only Q3.5B to calculate qLC at the surface) at z = 0' find qLC: f:: 1~·1£ 1"61 ~/1"IDnS Elev. li. +100' 0 +95' 15 +93' IS +90' 15 !W§f o 3.2(15)13 = 16 16 16 .... r ~ ~ ~ of "'3' .. 3,5 below tip =\ 0 0 - ~. ~ - at z = Dc = 18' (elev. +82') find qeD:
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Unformatted text preview: Elev. li. !Wf +100' +98' 15 6.4 (interpolated) +95' 15 3.2(15)/3=16 +90' 15 16 +85' 15 16 +80' 15 16 +75' 15 16 +70' 15 16 QaB =[1 ,( b.~" ~6 'ht) h f-'HI' ~f)l / /b'= If""./O hf Q3.SB = [t' ( H I jt ) ] h' ~ If?-6 ~ qCD = ( I So , b J-~.t ~ I b J~.( ) l:l : 15" s s I-s ( 38.48 CSFACD = 15.55 [10.29 + 0.5(15.55-1 0.29)] = 31.97tons Q s = 31.97 + (40'-18')(2' X 4)(0.267tsf) = 78.96 tons (vs. 85.5 tons) o Pile Capacity P u = as + Or-W = f ~. '1 & r 6 tj -= ?-t.? t , t Y...
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