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Gold Prince Tunnel Bulkhead Calcs Page 6 August 18, 1996 <br /> _ A. 0.0 0 =0.000000 <br /> pw b„d (12)66 <br /> V�=K(l.9 fc +2500pw M°d)bwd <br /> 14600(i2) <br /> V.=2.5 1.9 3o00 +2500(0. 00) 19900 12(60) <br /> Ve =2.5[104.1 +0.00]720 = 187,300 lb <br /> FS = vc = 187300 =9.41 <br /> V„ 19900 <br /> Earthquake bulkhead design;Load factors(ACI 318, Sec 9.2.2, 9.2.3, 9.2.5)Factor for fluid load <br /> under earthquake acceleration (F)= 1.05;Load factor for earthquake accelerated mass (E)_ <br /> 1.40. Maximum credible earthquake acceleration(a) is 0.087 Sf t 2 <br /> U= 1.05F+ 1.40E <br /> Mass (E) accelerated by maximum credible earthquake <br /> _ Sry.hl+Lhly. _ [300(62.4)9.5(8.5)+5(9.5)8.5(151)1 1512000+61000 _ lb•sec' <br /> E. 9 — 32.2 32.2 —48,850 ft <br /> E Em =Em =48850(0.087)=4,2501b <br /> E= E Em = 4250 =447 lb <br /> h 9.5 ft <br /> Total load under earthquake acceleration <br /> Gold Prince Tunnel bulkhead, for 20 ft pressure head to push water into Sunnyside Mine <br /> Hyq 20(62.4) =9 si <br /> P— 144 — 144 p <br /> F=pbw(12) =9(12)12 = 1296 lb <br /> ft <br /> Ua = 1.05F+ 1.40E= 1.05(1296)+ 1.40(447)= 1361 +626= 1987 b <br /> ft <br /> Earthquake nominal beam bending moment <br /> Mna = Ugly = 198788.52) = 17,950 ft-lb <br /> 6 <br />