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T <br /> Soil Nail Shotcrete Facing calcs <br /> Project#: 18185 Date: 2019/06 <br /> Project Name: Marquee Apartments Shoring <br /> Reference: FHWA IF 03 017 and FHWA SA 96 069 #9 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= 5 (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= 1.00 (in2) <br /> #9 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 ) = 0.138 (in2/ft) <br /> Facing Flexural capacity, Rff 5 <br /> Rff= 230 2 0.058 + 0.138 0.333 <br /> Rff= 30.1 (kips) <br /> Wall Location: North 18 foot wall. Temp case with 1 nails <br /> Similar Locations: Balance of North wall similar. <br /> Number of Rows of Nails = 1 (from output, corresponding to <br /> Max Avg Reinf greatest bar stress) <br /> Working Force Maximum Tavg s = 13.845 (kips) (from output) <br /> Tcap/ 1.8 = Tmax = 41.700 1.00 41.71 (kips) <br /> T nails = 34.050 1.00 34.050 Nail 1 <br /> (at X= 10 ft location) 0.000 1 0.000 Nail 2 <br /> 0.000 1 0.000 Nail 3 <br /> 0.000 1 0.000 Nail 4 <br /> 0.000 1 0.000 Nail 5 <br /> Average Force 0.000 1 0.000 Nail 6 <br /> of all Soil Nails T avg = (ksi) (in2) 34.050 (kips) <br /> T max s = 13.845 x 41.700 / 34.050 = 16.956 <br /> Force at Soil Nail <br /> Head T o = 16.956 x 0.714 = 12.106 (kips) <br /> Facing; Factor of Safety (FS) = Rff = 30.1 = 2.48 <br /> (FS min = 1.5) To 12.106 OK <br /> 18185E Page 180 of 180 <br />