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INPUTS and CONSTANTS <br /> Times Mine Bulkhead: 3/20/2022 <br /> Tunnel Height(hj 6 ft <br /> Tunnel Width(wf) 5 ft <br /> Bulkhead Height(hb) 6 ft <br /> Bulkhead Width (wb) 5 ft <br /> Design water head (H) 103 ft <br /> Bulkhead Trial Thickness(LT)_ft Must input final thickness to calculate area of reinforcing steel <br /> Water density(VW) 62.4 pcf <br /> Overburden rock density(yr)-pcf <br /> Concrete Density(yj 151 pcf <br /> Concrete Compressive Strength (fc) 3,000 psi <br /> Acceptable bulkhead pressure gradient(pag) 40 psi/ft This is for grouted rockmass, FS=10 <br /> Bulkhead depth below surface(BW) 26 ft <br /> Slope Angle of Topography(R) 26 <br /> Accoustical velocity of water(c') 4,748 ft/s @50-F <br /> Peak Ground Acceleration (PGA) 0.138 g Per USGS UHT; dynamic conterminous 2014(update);2%in 50 years <br /> Gravity Acceleration(g) 32.2 ft/seC <br /> Seed &Idriss Constant(SI) 1.8044 (ft/sec)/g From Seed and Idriss 1983 <br /> Seismic Design Handbook Constant (SDH) 2 (ft/sec)/g From Seismic Design Handbook(pg55) <br /> Beam Unit Width (b)-ft <br /> Inby Line-of-Site Water Distance(Sjj 380 ft <br /> Rebar Yield Strength(fy) 60,000 psi <br /> Minimum Rebar Cover(m,) 6 in <br /> Rock Cover Factor of Safety(FRS) Range 1.1-1.3 (Based on Bergh-Chriestensen and Dannevig, 1971) <br /> Fluid Static Load Factor(4)f5) <br /> Concrete Flexural Strength Reduction Factor(( Ppj <br /> Earthquake Static Fluid Load Acceleration Factor((�fe) 1.05 <br /> Earthquake Impounded Fluid Load Acceleration Factor(ka) 1.40 <br /> Reinforced Concrete Flexural Strength Reduction Factor()rc) 0.90 <br /> Rebar Flexural Strenth Reduction Factor(art) 0.90 <br />