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�/ickery �n�ineerin�� Consultins�.r,LLC <br /> 1444-I �i��:it�e Wao�s l�rivc,�c�en�rairfe.M�j 55�4J-150� <br /> � ��onr: �'?L-4<5-82?Z f :�x: q52-^FZ6-19J1 <br /> ivickr ri����ic ke rycn�.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 - Garage Walls <br /> Page 1 of 2 <br /> Desiqn Parameters: <br /> Retained Soil Friction Angle, �sr:= 28dcg Soil Unit Weight, �ys:= 125pcf Crest Slope, (3:= Odeg <br /> Foundation Soil Friction Angle, �sf:= 28deg <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 HeigM, Hr:= He+ Hb <br /> Hr= Sft <br /> Top of Wall Width, Wc:= 1.5ft Base of Wall Width, Wba:= 2.3ft <br /> a:= 83deg �:= 90deg - a � = 7•deg v = tan(�sf) v = 0.532 <br /> Calculate Wall Weiqht: <br /> Wl :_ .5•(Wba— Wt)•He•�yr•lft Wl = 2701bf W2 := Wt•He•�yr•lft W2 = 1.013x 1031bf <br /> W3 := Hb•Wba•rys•lft W3 = 143.751bf Ww:= W1 + W2 + W3 Ww= 1426.31bf <br /> Active Earth Pressue Coefficient(Ka): <br /> (cos(�sr+ �)) <br /> 2 <br /> Ka :_ <br /> Z Ka= 0.274 <br /> (cos(�))��(cos(S1 — �;))��1 + �(sin(�sr+ S1))�(sin(�sr— (3))� <br /> [(cos(S1 — �))�(cos(�— �))] <br /> Total Horizontal Force: Wt <br /> HorizOntal ForCe From SOiI, Fah:= .5•^�s•Ka•Hr•Hr•cos(S1 —�)•Ift Fah= 419.SIbf <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•-ysKa•Hr•Hrsin(S1 - �)•lft Fav= 86.61bf 1 <br /> Fu:= v•(Ww+ N'av) Fu= 804.41bf <br /> Factor of Safetv, Base Slidinq: <br /> 3 Hb <br /> FOS Sliding, FOSs := F" FOSs = 1.917 <br /> �� wb <br /> �ngineerin��jo/utions fo�an Unsta6/e Wo�d <br />