Laserfiche WebLink
Engineering Analytics, Inc. CLIENT: MGC JOB NO- 110617 PAGE: 21off16 <br />PROJECT- Spillway Drop Structure DATE: 12/17/2015 DATE CHECKED: 12/17/2015 <br />DETAIL: Channel Wall COMPUTED BY: LLM CHECKED BY: LCB <br />Given: Retained Wall Height at a, H,:= 5.5 ft <br />Construction Load Height, Hestc=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, Lc.n,t :=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 = 983.125 lbs <br />ft <br />lbs <br />V const := Lconst ' Ha = 715 ft <br />Vuconst := FSEarth ' Vsoilatrest + FSLL ' Vconst = 2.717.10 3 lbs <br />ft <br />d:=10 inches <br />OVn:=2•0•12•d•�=1.207.104 lbs <br />ft <br />Thus, wall thickness of (D) D:= Dcover + d = 12 in. will not require stirrups. <br />Calculate the maximum Moment at point a <br />3 <br />Msoilatrest := Ka • Ha =1.802.103 ft • f t <br />6 <br />2 <br />Mconst :_ (Lc—t'Ha =1.966.103 ft • lbs <br />2 ft <br />Mo:=Msoilatrest+Mconst=3.769.103 ft• lbs <br />ft <br />M,a:=FSEarth'Msoilatrest+FSLL'Mcomt=6.03.103 ft• lbs <br />ft <br />