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,, <br />'~ RECEIVED ~~~ ~~~~~~~~~~~~~~~~ <br />Portal Bulkhead Design <br />Page 1 <br />Design Parameters <br />Seal Wa11 Height - 10 feet <br />ocr la ~9aa <br />MINED LAND REGIAMATION DtVISlON <br />Colo. Dept. of Natural Resources <br />Head at top of bulkhead - 140 feet water = 50.34 psi <br />Head at bottom of bulkhead - 150 feet water = 64.65 psi <br />- 60.34 psi <br />_ ~~C~' _ -gyp ' ~ - {FI~. <br />°.`.•~=''~~` 1~ - - - avg. psi = 52.50 psi <br />~^ .'R - <br />_ ~:~:~: <br />r. ,.', _ <br />_ 64.65 psi <br />Vertical Reinforcement <br />P = 5-".•.55 psi (10' x 1') (144 in2 1 ft2) = 93,096 1b5. <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 />Maximum bending moment ? 0.58h from top of wall <br />0.58 x 10' = 5.80' from top of wall <br />Mk (live load moment) = 0.128 Wh - 0.128 x 93,096 lbs x 10' = 119,162.88 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 = "4u/0 = 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 ~ is a factor which provides for variations in workmanship, <br />materials construction, etc. <br />