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11ll:jf'LO'-r I..JO r 8 A wJ 1)V4IV tl <br />Y <br />Project, Pierce Adit Bulkhead, Sta. 3+04 By MEAL/JFA Date 10/30/07 <br />12' Thick, 12' Wide, 12' High, #6 Rebar Sheet 3 of 8 <br />Bulkhead thickness (length) to resist concrete shear from static fluid load on upstream face: <br />Factored static fluid load on bulkhead face. FS 144• ?,:s•p•hb•wb F, = 1509581 lb <br />r- s <br />Factored static fluid load/sq ft of face, wfs Ljf: = 10483 psf <br />hb' wb <br />Concrete shear strength, fps ;= ? is fCS = 109.5 psi <br />Bulkhead thickness to resist factored shear load, Ls := Fs LS = 1.99 ft <br />2. 111,+wb)•144•fcs <br />Plain concrete deer)-beam bending, stress design for static fluid load on-upstream face: <br />Deep-beans defined as Wb/Lt < 4 (ACI 318-02, Sec 10-7), <br />wb <br />= 1.0 which is less than 4. 1•herefore, this is a deep beam for design. <br />Lt <br />Factored static fluid load on bulkhead face,:= 144 Qifs p 1 b wb FS = 1509581 lb <br />P <br />Uniform factored static fluid load on bulkhead, f, := S f, = 10483 psf <br />hb' wb <br />2 <br />Nominal static fluid bending moment, Mn := fs•'Ab Mn = 188698 ft-lb <br />8 <br />M <br />Factored static fluid bending moment, NIu M„ = 343087 ft-lb <br />?pc <br />144. Lt2 <br />Bulkhead section modulus, S = 3456 <br />6 <br />Concrete flexural (tensile) design stress, fcl := 3 f- <br />Mu _ Mu <br />as '_ S ? 2 <br />144• Lt <br />6 <br />MI, <br />,J 14 as <br />f,I = 164.3 psi <br />M, <br />24 2 <br />Lst = 9.3 3 ,-'t