Download - Keystone

DPART SIXAppendix D3H:1V SLOPING SURCHARGE AASHTO METHODOLOGIES7) Base SlidingLateral Driving ForcesR d = P ah= 3632 lbs= 3632 lbs/ftLateral Resisting ForcesR r = (W f + W 1 + W 2 + P av ) x Tanφ of foundation= (1200 + 9600 + 1277 + 1208 ) x 0.577= 7665 lbs/ftFS sl = R r /R d = 7665/3632 = 2.11 > 1.5 OK8) Sliding at Lowest Reinforcement LevelLateral Driving Forces (at depth of 9.33')R d = P ah @ 9.33'= ½(120)(9.33' + 2.66')² (0.398)cos18.4= 3257 lbs/ftLateral Resisting Forces (at depth of 9.33’)τ unit = 1250 + Ntan29°= 1250 plf + (9.33' x 1.00' x 120 pcf) tan29°= 1871 plfτ soil = ((γ H (B-W u )) + W 2 + P av ) x Tan φ (of reinforced material) x C ds= ((120 pcf x 9.33 x 8.0') + 1277 + 1208) x 0.675 x 0.90= 6951 lbs/ftFS sl = R r /R d = (1871+6951)/3257 = 2.71 > 1.5 OKD.4