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Pierce Adit Bulkhead, As-Built <br />Project, Sta. 2 + 84 By MEL/JFA Date 3/28/08 <br />12' Thick,ll'-7" Wide, 11'-8" High, Sheet 3 of 8 <br />#6 Rebar <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•~fs•p•hb•wb Fs = 1417908 lb <br />F <br />Factored static fluid load/sq ft of face, wfs ~= s wfs = 10483 psf <br />hb • wb <br />Concrete shear strength, fcs := 2 fc fcs = 146 psi <br />Fs <br />Bulkhead thickness to resist factored shear load, L5 := Is = 1.45 ft <br />2• (hb + wb) • 144• fcs <br />Plain concrete deep-beam bending stress design for static fluid load on upstream face: <br />Deep-beam defined as Wb/Lt < 4 (ACI 318-02, Sec 10-7). <br />~'b <br />- = 1.0 which is less than 4. Therefore, this is a deep beam for design. <br />Factored static fluid load on bulkhead face, F~:= 144• ~fs' P' hb' ~'b Fs = 1417908 lb <br />F <br />Uniform factored static fluid load on bulkhead, fs := s fs = 10483 psf <br />hb• wb <br />2 <br />w <br />Nominal static fluid bending moment, M„ := fs• b M„ = 176024 ft-lb <br />8 <br />M <br />Factored static fluid bending moment, M„ :_ ~ n M„ = 320043 ft-lb <br />pc <br />144• L,t2 <br />Bulkhead section modulus, ~:= S = 3456 in3 <br />6 <br />Concrete flexural (tensile) design stress, f~l := 3 f~ f~l = 219 psi <br />MU MU M <br />S 144• I,t2 '~` • 24 j,t2 <br />6 <br />Mu <br />~s.:= fcl I-st ~= 24 Qs L5t = 7.80 ft <br />