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~~~ <br />F ~~ <br />Portal Bulkhead Design <br />Page 1 <br />Design Parameters <br />RECEIVED <br />OCT 18 1984 <br />MINED IAND RECLAMATION DIVISION <br />Cab. Dept of Natural Resources <br />Seal WaIT Height - 10 feet <br />Head at top of bulkhead - 140 feet water = 60.34 psi <br />Head at bottom of bulkhead - 150 feet water = 64.65 psi <br />60.34 psi <br />avg. psi = 52.50 psi <br />Vertical Reinforcement <br />64.65 psi <br />c <br /> <br />P = 54.55 psi (10' x 1') (144 in2 1 ft2) = 93,096 lbs. <br />Force resisted by roof = 1/3 x 93.096 lbs.= 31,032 lbs. <br />Force resisted by floor - 2/3 x 93,096 lbs. = 62,064 lbs. <br />"•laximum bending moment @ 0.58h from top of wall <br />0.58 x 10' = 5.80' from top of wall <br />MR (live load moment) = 0.128 Wh - 0.128 x 93,096 lbs x 10' = 119,162.38 ft. lbs. <br />"~1u = 1.7 MR = 1.7 x 119,162.99 ft. lbs. = 202,576.9 ft. lbs. where <br />1.7 is a factor of safety <br />Mt = Mu/~ = 202,576.9 ft. lbs ~ 0.90 = 225,085.44 ft. lbs. <br />= 2,701,025 in. lbs. <br />= 2,701 Kip - in <br />where Q is a factor which provides for variations in workmanship, <br />materials construction, etc. <br />