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Soil Nail Shotcrete Facing calcs <br /> Project#: 18185 Date: 2019/06 <br /> Project Name: Marquee Apartments Shoring <br /> Reference: FHW.A IF 03 017 and FHWA SA 96 069 #8 Nails <br /> Facing flexural capacity is critical where maximum spacing and where Tavgs is greatest. <br /> Check where Tavgs is greatest. Similar at all other locations. <br /> Horiz. Spacing Sh = 5 (feet) Maximum (from output, corresponding to <br /> Vertical Spacing Sv= 6 (feet) Maximum greatest bar stress) <br /> Table 5.1 Factor Cf= 2.0 Temp Shotcrete Facing <br /> Wall Thickness h= 4 (inch) = 0.333 (feet) <br /> Vertical Rff= 230 x Cf ( a vn + a vm ) h fy nail = 75 (ksi) <br /> Horizontal Rff= 230 x Cf ( a hn + a hm ) h As nail = 0.79 (in2) <br /> #8 Nails <br /> WWF Reinf. a vm = a hm = 0.058 (in2/ft) for WWF 6x6 W2.9 x W2.9 typical <br /> a vn = a hn = 0.058 + ( 2 x 0.2 ) = 0.125 (in2/ft) <br /> Facing Flexural capacity, Rff 6 <br /> Rff= 230 2 0.058 + 0.125 0.333 <br /> Rff= 28.0 (kips) <br /> Wall Location: West 25 foot with 5 nails <br /> Similar Locations: Balance of West wall similar. <br /> Number of Rows of Nails = 5 (from output, corresponding to <br /> Max Avg Reinf greatest bar stress) <br /> Working Force Maximum Tavg s = 8.858 (kips) (from output) <br /> Tcap/ 1.8 = Tmax= 41.700 0.79 32.943 (kips) <br /> T nails = 33.236 0.79 26.256 Nail 1 <br /> (at X = 10 ft location) 33.246 0.79 26.264 Nail 2 <br /> 35.456 0.79 28.010 Nail3 <br /> 38.238 0.79 30.208 Nail 4 <br /> 34.131 0.79 26.963 Nails <br /> Average Force 0.000 0.79 0.000 Nail 6 <br /> of all Soil Nails T avg = (ksi) (in2) 27.541 (kips) <br /> T max s= 8.858 x 32.943 I 27.541 = 10.596 <br /> Force at Soil Nail <br /> Head T o = 10.596 x 0.714 = 7.565 (kips) <br /> Facing; Factor of Safety (FS) = Rff = 28.0 = 3.70 <br /> (FS min = 1.5) To 7.565 OK <br /> 18185B Page 55 of 180 <br />