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Design Calculations for Kimberly-Clark Hog Fuel Fire Access <br />David Evans and Associates, Inc. <br />1 /14/2009 <br />Design of Roadway on very poor soils. <br />pwo�oi-o� a <br />1. Place geolexlile on exisling ground wlgeogrid material over the top or use a combined product <br />2. Place 12" granular fill/quarry spall with geotextile place 4" crushsd base. <br />3. Drive over for a period of approximately 1 month, fill ruts. <br />4. Place remaining 2" suriacing course and grade lo drain. <br />Calculation Procedure: <br />r <br />Cu <br />Nq <br />Nc <br />B <br />T <br />B <br />Y <br />Di <br />2 <br />52.3 <br />0.1 <br />200 <br />10 <br />9,600 <br />8 <br />40 <br />0.4 <br />q� = Q�+q2+q3+q4 <br />(1 to 2 feet) <br />cohesion of soil (52.3 to 146.3 psf) <br />Bearing Capacity Factor <br />Bearing Capacily Factor <br />Intemal Friction Angle <br />Tensile Force in Geotexlile; 2 layers ot Mira� <br />Loaded widlh (ft) <br />unit weighl of so(t soil <br />setllement (0.4-0.6, 0.4 is worse case) <br />Total Bearing Capacily <br />q1=Cu'Nc <br />q1= 10,460.00 psf <br />q2=(2TsinB)/B <br />q2= 476.76 psf <br />q3=(T'Nq)/r <br />q3= 480.00 ps( <br />q4=y'Df <br />q4= 16.00 ps( <br />qt= 11,372.76 psf <br />10.460 ksf <br />0.477 ks( <br />0.480 ksf <br />0.016 ksf <br />11.373 ksf <br />FS = qUq such thal q= qs+qm and q= yB(H) and qm = w(1+i)/B'L <br />yB= 0.12 unit weight of soil under tire k/ft^3 <br />H= 1.5 fl <br />W= 45000 Fire Truck with ladder and outriggers up (Ib) <br />i= 0.2 impact factor <br />8= 8 fl <br />L= 4 ft <br />qs= 0.18 ks( <br />qm= 1.6875 ksf <br />q= 1.87 ksf <br />FS= 6.09>1.5 Q�� <br />REFERENCES <br />� /..� /z„q <br />H. Ochiai, Y. Watari, Y. Tsukamolo "Soil Reinforcement Practice (or Fills over Sofl Ground In Japan", 1995 <br />I<MBY00000002 <br />`/� <br />