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Unit Weight: 120 Ib/ft3 <br />Cohesion: 1 psf <br />Friction Angle: 26 degrees <br />Water Surface: None <br />Material. 80-mil/Soil Liner <br />Strength Type: Mohr-Coulomb <br />Unit Weight: 120 Ib/ft3 <br />Cohesion: 1 psf <br />Friction Angle: 18 degrees <br />Water Surface: None <br />Material: Structural Fill <br />Strength Type: Mohr-Coulomb <br />Unit Weight: 120 Ib/ft3 <br />Cohesion: 1 psf <br />Friction Angle: 35 degrees <br />Water Surface: None <br />Global Minimums <br />Method: spencer <br />FS: 1.572510 <br />Axis Location: 323-887,1775.278 <br />Left Slip Surface Endpoint: 351.411, 118.942 <br />Right Slip Surface Endpoint: 1665.470, 803.496 <br />Resisting Moment=1.28037e+010 lb-ft <br />Driving Moment=8.1422e+009 lb-ft <br />Resisting Horizontal Force=6.79844e+006 lb <br />Driving Horizontal Force=4.32332e+006 lb <br />Valid / Invalid Surfaces <br />Method: spencer <br />Number of Valid Surfaces: 2471 <br />Number of Invalid Surfaces: 2529 <br />Error Codes: <br />Error Code -108 reported for 820 surfaces <br />Error Code -111 reported for 931 surfaces <br />Error Code -112 reported for 778 surfaces <br />Error Codes <br />The following errors were encountered during the computation: <br />-108 = Total driving moment <br />or total driving force < 0.1. This is to <br />limit the calculation of extremely high safety <br />factors if the driving force is very small <br />(0.1 is an arbitrary number). <br />-111 = safety factor equation did not converge <br />-112 = The coefficient M-Alpha = cos(alpha)(1+tan(alpha)tan(phi)/F) <br />< 0.2 for the final iteration of the safety factor calculation. This screens out <br />some slip surfaces which may not be valid in the context of the analysis, in <br />10,