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MflY-��-2006 11:27 FROM:J R KING ENG 9529440588 T0:7634777104 P.012�012 <br /> �� <br /> 6� , , Design Manu�l:for Scgmenk�,l Retaining Walls <br /> � - <br /> Section 4.3 <br /> N1YIVIMLJIV�FACTnRS OI'SAFETY FOR�TAI3ILITY ANALYSES <br /> Selcction of appropriate factors c�f safety should he based on r.he ceirtainry with which desi�n <br /> parameters and the conseyuenc;es of failure are.known. '1'ablc 4-I lists the reconuticnded minimUm <br /> s�fety factors f�r b�ravity SRWs. It►cluded in thcsc re;commendcd rr�inimutns :tt'o l'ypic�l levcls �f <br /> uncertainty in wall gec>mel.ry aald impc�sed loadings. <br /> TARL,F 4-1 <br /> }.2ecommended E1�inimum Factors of Sxfety for llesygn <br /> of ConventiUaal SRWs � <br /> rs <br /> Fs�ilt�re Moile.s <br /> Basc Sliding I'S„ 1.5 <br /> Ovem�rning FS 1.S <br /> -Bearirrg Cap�tcity F4S« 2.0 <br /> I.�ternal She��r Cap�city FS�` Y.5 . <br /> Global Stability TSRf 1.3 - 1.5 <br /> � <br /> Section 4.4 <br /> SFCML+"NTAL LJNI'1'PRnPi+a�T1E�,S <br /> Dimensions and mec-hanical properties of su�n,ental units must be escablishcd prior to dcsi�,*n. <br /> These par�trneteis arc: <br /> f�p = SRW unit hei�ht(ft) <br /> 1`Y,�= SRW unit cap(a>Pii�g)htight(�k) <br /> Wn = ���ll(Il�WI(�t�]��� <br /> r„ � wei�ht of se;gment��l un'tl�er utlit vuluiiie �s pl�tced (i1�cl�iides stone fill if appIicable) <br /> �n � <br /> Csy = clist�nce to center of gravity uf tu�rii.�nt�l SRW uni[, includ.ing draina�e fill, <br /> � m�as�u•ed trom che fr�nt fi�ce�f tt�e unic(ft) <br /> ua = w�ll ba�ter du�to segniental un,it setback pe.r c.ourse(deg) <br /> p, = iiit�rface.friction coeifieient for b3se segmental unit sl.iding on heac•iii�sc>ils <br /> a�, � a�parent ix�iuimiym shea.t'c�tp�c;ity bctwc;en tiegmcntal ui�its(lb/fk) <br /> �, = ap��rent;�,ngle of friction becween sc�rnenral units(deg) <br /> d„ � se;t�ack per cuurse F.lu (yn.) <br /> `i � . <br /> � � <br /> 1 <br />