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d <br />tS7 �dnnr <br />frictional C�inacities: ror friclionnl resislancc of Ihc chillcd pic�s, ;tcting hoth do�vmvard and in upti['t, �vc <br />recomntend using l6e tilluwable skin friclion value lisied ir 'iable 2. �Ve recommend that frictinnal <br />resis�ance hc ncgicc�ed in thc uppcmiost 2 fce� hclm�� the ground surface. The allo�vablc skin Giction <br />value prescnicd includcs a safety (actnr of I.S. <br />7'ahlc 1 -- - — <br />Allu�niblc Slciu Priction Ciqmcitl:s <br />Deplh (feel) Allmvabic Skin T�rir.tion (IsQ <br />�-2 0.0 <br />2-G 0.10 <br />G-30 0.05 <br />30-37.5 035 <br />1��ir,�_�I Gipacitica: Por design againsl lnleral lorces xclia!: againsl ihc drilled pier, to�u melhods �uc <br />typically used. The pnr:�meter used io sciccl U�c appropriale design method is Ihe Icnglh lo picr stil'Incss <br />rmio I!'I', wl�ere L is thc picr lenglh in inchcs, and T is Ihe rclative slifTncss fnctor. 'fhc rcl;uive stil7'uess <br />J:iclor (I') shoc!d bc contputed hy: <br />T=1 L���� <br />� �4� <br />���hcrc G = nwdulus oi'clas�icily Q�si) <br />I = momcnt af incrtia (in°) <br />n�, = constant of horizontal subgrnde reaction (pci) <br />I he tactors L-; aud 1 are go��cincd by Ihc internal material sucnglh CI18f1CICfISIII'S of thc piec �\ <br />rcprescntativc ��aluc of n� ihr Ilic soil types encountered nt �his si�c is presentcd hclm�� in Tablc 4. Piers <br />�tllUl 71 L7T fTI]U OI� IC55 Illnn 2 may he assumed lo be rclalively rigid .md acting as a pole. 9'he passive <br />pr�sxwe appruxh may bc used for lhi� coudi�ion. Por picrs u�ilh a Lll' r;uio grr,ucr ihan 2, Ihe uiodulus <br />nf suborade renciion mclhed is l��pically used. Duth of ihcsc methods are discussed bclo�r: <br />Vcrizun lVirelcss Auyusi J, 2M)i � <br />Ad�plPmic.i\'o.\1010J�9i7? I':�ge1 �^�� <br />// <br />