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�/ickery �,n�ineerin�Fy Consultin��.,LLC <br /> 1444�I �ii�n�e�ti��,c�c�s�rive.�c�en�r�irie.M�j 5534J-I 50� <br /> f'�one: 952-4e5-82J2 { :ix: 952-426-1971 <br /> rvic kr rt�C�vic�Ccrt�en�.com <br /> Boulder Wall Calculations - 5-foot Total Wall Height <br /> Project VEC 13-037 - March 20, 2014 <br /> 3625 Eileen Street, Maple Plain, MN - Driveway Wall <br /> Desiqn Parameters: Page 1 Of 2 <br /> Retained Soil Friction Angle, �sr:= 28dcg Soil Unit Weight, ^�s:= 125pcf Crest Slope, p:= Odcg <br /> Foundation Soil Friction Angle, �sf:= 28deg <br /> � <br /> bl := 3 �sr S1 = 18.667�deg RoCk Unit Weight, �yr:= 150pcf Surcharge Load, qs := Opsf <br /> Exposed Height, He:= 4.5ft Wall Embedm ent, Hb:_ .Sft Total Height, Hr:= He+ Hb <br /> Hr= Sft <br /> Top of Wall Width, Wt:= 1.5ft Base of Wall Width, Wba:= 2ft <br /> a:= 83deg � := 90deg - a � = 7•deg v := tan(�sf� v = 0.532 <br /> Calculate Wall Weiqht: <br /> Wl :_ .5•(Wba- Wt)•He•7r•lft Wl = 168.751bf W2 := Wt�He•7r�lft W2 = 1.013x 1031bf <br /> W3 := Hb•Wba•^ys 1 ft W3 = 1251bf Ww:= W 1 + W2 + W3 Ww= 1306.31bf <br /> Active Earth Pressue Coefficient(Ka): <br /> Ka= (cos(�sr+ '�)) <br /> 2 <br /> 2 Ka= 0.274 <br /> (cos(�))��(cos(S1 - �;))��1 + «sin(�sr+ Sl))�(sin(�sr- (3))] <br /> [(cos(S 1 - �))•(cos(-�j;- (3))] <br /> Total Horizontal Force: Wt <br /> Horizontal Force From Soil, Fah:= .S��ys•Ka•Hr•Hr�cos(S1 — �)•lft Fah= 419.51bf <br /> Horizontal Force From Surcharge, Fs := qs•Ka•Hr•lft Fs= 0 <br /> Total Horizontal Force, Fh:= Fah+ Fs Fh= 419.5 lbf 2 H� <br /> Frictional Resistance: <br /> Vertical Force From Soil, Fav:= .5•�ys�Ka•Hr•Hr�sin(S1 — �)•lfr Fav= 86.61bf 1 <br /> Fu:= v•(Ww+ Fav) Fu= 740.61bf <br /> Factor of Safetv, Base Slidinq: <br /> 3 Hb <br /> FOS Sliding, FOSs:= FU FOSs= 1.765 <br /> � wb <br /> �ngineerrngso/utions�o�an unsta6/e wor�d <br />