Laserfiche WebLink
=1 � <br />Designing with Geornembfanes Chap. 5 <br />7be simadon with an anchor trench at the end of the runout sectiOCI is illustrated in <br />Figure 5.28. The configuration requires some important assumptions regarding the state <br />of stress within the anchor urmh and iu r=== Mwhan — In order to "tabdsh craw <br />oquil.ibrium, Daniel 127) has suggested using imagiaxy and frictionless Pulleys As shown <br />on Figure 5.28, which allows for the gCOMMbMw to be considered in its continuous <br />form. <br />ME <br />IMAgIrwy FAr FA T <br />dA r <br />77 <br />hictionim PUIWO <br />T <br />F*mS.2S Cmu-wwwof gwarmbn=M=n=tIOn with awbor tica dt and rear- <br />ed sutssm &M fcv= involvad. <br />Tai,,,. Fu + FL + 2FAT <br />where <br />Tsjio« the oa),r r, in which <br />47allaw = the allowable geomembrane stress s a.WFS, <br />cr.h = the Ultimate geornembrane stress, e.g., yield or break, <br />FS = the factor of safety, and <br />t m the geomembram thickness: <br />Fu — the friction force above georwmbmne (assumed to be negligible, since the <br />cover soil probably moves along with the liner as it deforms); <br />Ft. — q tan a (1*0), in which <br />— the sumbarge Srsaur <br />— the depth of cover toil, <br />'Yce - the unit weight of cover soil, <br />5 = the friction angle between geornernbrane and soil, and <br />Lno the (unknown) -length of runout; and <br />FAT = (ah).,,. Un 6 (dAO, in Which <br />I <br />