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BY...RLC....DATE...........3/15/22....... SCHNABEL ENGINEERING SHEET NO...........OF............ <br /> CHECKED BY...CMG....DATE............ JOB NO.................................. <br /> SUBJECT......TIMES MINE BULKHEAD............................................................................................................................................... <br /> BULKHEAD DESIGN CALCULATIONS <br /> INPUTS <br /> Tunnel Height ht=6 ft <br /> Tunnel Width wt:=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:=8 ft <br /> Overburden rock density 7,.:=165 pcf <br /> Concrete Unit Weight -y,:=151 pcf <br /> Concrete Density p,:=4.689 slug <br /> ft3 <br /> Concrete Compressive Strength f�:=3000 psi <br /> Acceptable bulkhead pressure gradient pay:=40 f <br /> t <br /> Bulkhead depth below surface Bw:=26 ft <br /> Slope Angle of Topography 0:=12 deg <br /> Peak Ground Acceleration PGA:=0.138 g <br /> Beam Unit Width b:=wt <br /> Inby Line-of-Site Water Distance SAS:=380 ft <br /> Rebar Yield Strength f y:=60000 psi <br /> Minimum Rebar Cover m,:=24 in <br /> Rock Cover Factor of Safety FRc:=1.1 <br /> Fluid Static Load Factor O f,:=1.4 <br /> CONSTANTS <br /> Acoustical velocity of water c'-4748 ft <br /> s <br /> Acceleration due to gravity 32.2 ft <br /> 9— 2 <br /> s <br /> Seed and Idriss Constant SI.=1.8044 (t <br /> 9 <br />