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Engineering Analytics, Inc. CLIENT: MGC JOB NO: 110617 PAGE: 21obl0 <br />PROJECT: Spillway Drop Structure DATE: 12/17/2015 DATE CHECKED: 12/17/2015 <br />DETAIL: Tall Energy Dissipator Wall COMPUTED BY: LLM CHECKED BY: LCB <br />Given: Retained Wall Height at a, H,:= 15 ft <br />Construction Load Height, Mconst := 2 ft <br />Unit Weight of Soil, y:=130 lbs/ft3 <br />Stress Ratio, at rest, K.:=0.5 <br />Strength Reduction Factor, 0:=0.75 <br />Compressive Strength of Concrete, fie:=4500 psi <br />Construction Load, Lconst:=130 Ib/ft2 <br />Earth Loading Factor of Safety, FSEarth:=1.6 <br />Live Loading Factor of Safety FSLL:=1.6 <br />Concrete Cover Thickness Dcover:=2 in <br />Calculate the maximum Shear Load at point a <br />Vsoilatrest:=0.5 Ko•y•Ha2 =7.313.103 lbs <br />ft <br />V L H =1.95.103 lbs <br />const := const ' a ft <br />Vuconst := FSEarth ' Vsoilatrest + F' "SLL ' Vconst =1.482.104 lbs <br />ft <br />d:= 13 inches <br />OVn:=2.0.12•d• f'e=1.57.104 lbs <br />ft <br />Thus, wall thickness of (D) D:= Dcover + d = 15 in. will not require stirrups. <br />Calculate the maximum Moment at point a <br />3 <br />Msoilatrest := Ko • y • Ha =3.656.10 4 <br />3.656.104 ft - lbs <br />6 a\ ft <br />Mconst:= (Lconst'Ha 1 =1.463.104 ft - lbs <br />2 ft <br />MO: =Msoilatrest +Mconst = 5.119.104 ft , lbs <br />ft <br />Mu:=FSEarth'Msoilatrest+FSLL•Mconst=8.19.104 ft. lbs <br />ft <br />Calculate the maximum Shear Load at point b <br />Retained Wall Height at b, Hb:=9 ft <br />