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• <br /> Soil Nail Wall Design Criteria (ASD Factored Input for SNAIL) <br /> Reference: FHWA NHI 14-007 (FHWA GEC 007) <br /> FHWA IF 03-017 <br /> FHWA SA 96-069 <br /> Punching Shear Capacity: <br /> FHWA equations are based on a Round Bearing Plate with a <br /> punching shear cone surface = it D'c h0 _ it (Lbp + h ) h <br /> Equivalent Punching Shear for a Square Plate = 4 (Lbp + h ) h <br /> 4" Shotcrete Facing: f'c = 4000 psi <br /> h = 4" <br /> Vf= 0.58 SQRT( 4000 ) 4 ( Lbp + 4 ) 4 / 144 in2/ft2 <br /> of = 0.67 Note: 1/af = FS = 1.5 (Temporary Re Table 5.1) <br /> Punching Shear Capacity at Bearing Plate for 4" thick temp facing: <br /> 6 x 6 x 5/8 Vf= 40.7 kips of Vf = 27.3 kips <br /> 8 x 8 x 3/4 Vf = 48.9 kips of Vf = 32.7 kips <br /> Use same values for 5" facing. <br /> 18185E Page 19 of 180 <br />