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Boulder Wall Calculations - 3-Foot Total Wall Height, No Crest Slope <br />Project VEC 24-055 - April 15, 2024 <br /> 4745 North Shore Drive, Orono, Minnesota <br />Page 2 of 3 <br /> Calculate Overturning Moment: <br />Driving Moment,Mo 0.5 KaγsHrHrcos δ1 ψ()Hr <br />3 <br /> <br /> <br />qs KaHrHr <br />2 <br /> <br /> <br />Mo 238.2 lbf <br /> Calculate Resisting Moment: <br />Resisting Moment is calculated by taking the sum of the weights times the moment arms for each section of wall above <br />M1 <br />W1 Wba Wt()2 <br />3 <br /> <br /> <br />1ftM1 96.667lbf <br />M2 <br />W2 Wba Wt()Wt <br />2 <br /> <br />1ft()M2 435lbf <br />M3 <br />W2 Wba <br />2 <br /> <br /> <br />1ftM3 290lbf <br />Resisting Moment,Mr M1 M2M3Mr 821.7 lbf <br /> Factor of Safety, Overturning: <br />FOS Overturning,FOSot Mr <br />MoFOSot 3.45 <br />Analyze Bearing Capacity <br />Bearing capacity coefficients: <br />Nq exp π tan ϕsf()()( ) tan 45 degϕsf <br />2 <br /> <br />2 <br />Nq 18.401 <br />Nc Nq 1( ) cot ϕsf()Nc 30.14 <br />Nγ 2Nq 1( ) tan ϕsf()Nγ 22.402 <br />Eccentricity of Resultant Vertical Bearing Force (E):E Wba <br />2 <br /> <br /> <br />Mr Mo() <br />Ww <br />1ft <br />E 0.148 ft <br />45