Laserfiche WebLink
11 <br />El <br />Shaw Environmental, Inc. <br />NORTH COUNTY RECYCLING CENTER AND SANITARY LANDFILL, MODULE 4 <br />CHECK OF EXISTING LEACHATE COLLECTION PIPES <br />USING THE IMPROVED PIPE LOADING CALCULATION <br />D. Pipe Buckling <br />Acceptable factor of safety = I=! <br />The critical buckling pressure, P�� in psi, is given by, <br />P.,= 0.55I M E' 1 ,]Y2 <br />L 0.149R� <br />Therefore, factor of safety (FS) against pipe buckiling, <br />Unit Initial <br />Lona -Term Note <br />PC,. (psi) 662 <br />283 - <br />61 (psi) 178 <br />97 - <br />FS = P,,Ay - 3.71 <br />2.91 F.S. is Acceptable <br />E. Wall Crushing <br />Acceptable factor of safety = C77� <br />Ignorin6 bending, the axial stress PSA in psi is given by, <br />P, A = <br />Therefore, factor of safety (F.S.) against wall crushing, <br />Unit Initial <br />Lona -Term Note <br />PSA (psi) 1296 <br />708 - <br />PA (psi) 3000 <br />1440 <br />FS = PA/PSA - 2.32 <br />2.03 F.S. is Acceptable <br />N:\GEOTECHNICAL\NCRC&SL-2007\Pipe-Loadino\Module 4\Module4_41nchPipe_ImprovedMethod_241 ft.xls <br />Page 5 of 6 <br />