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1 <br /> � <br /> � clrun-�,ut, f�,r �Ir:iiu pipe inaintenune�: ,h��ul�l bc in�i:ilk�. :A Inrerr di;imetrr pipc �,�ill allu��. t�ir rusirr <br /> mainten:mee of drain s�stems. <br /> IIt no spccial waterpruoling nuasures are taken. leaksiseepaec ma}' occtu' ir lo�olized areas of thc <br /> belo���-ernde porti�n of thc buildine, evcn iF !hc recommended �eall dr�inaee .md bclo��� slab drainaec <br /> � pro��itiions arc umsu�ucte�l. If Ic.iks';cep:��e is undesirable. bclu�c-gr;ide a�nterproulin� ;hould be <br /> spccilicd. <br /> ( BELOW GRADE WALLS <br /> � <br /> Permanent Subsur(ace Walls <br /> � Dclow �rndc �c:ills arc anticipatcd t�, rnnec up to ahaui �0 f�ct in hcicht. I3ascd �ro our �li;.u,;i�,n; �cith <br /> the project tcam. it is desirabic tu construct ;i permancnt top-do�vn suil nail ��:ill ,"tem. fhr prrm;m�nt <br /> Ibclo��-gradc �e:tlls ��ill bc intcrnally braced b� thc Iloor slabs. <br /> i <br /> Permanent substu'ihce ���alls should be designed to include a seismic load actine o�cr thc hci�ht ol tnc <br /> � wall equal to 71I psf((actorcd). fhis ��aluc is c�pressed :u an eneelope of thc highcst sri,mic IoaJ that <br /> could a�fcct thc ���nll and docs not rcquirc a load f:�ctor. Other surchargc loads, such as Gom foundations. <br /> cunstruction cquipmcnt, or construction st;�_ine areas, should bc considcred un a casc-bc-casc hasis ;u <br /> i <br /> shuwn on Pigurc 9. AVc can provide the latcral pressures tiom dicsc surcharge lu:idx ns ihc dr�ign <br /> I progresscs. <br /> Permancnt �v:ill drains should be includcd in the desi�n [o prevent the buildup ��( hc�lro;cui� ��rc„urc <br /> � behind the �calls, ;�s describeJ in ihe esc:rv;uinn �uppun scetion. :mr.l iied to pennanent dr;ihi; t„ remoce <br /> watrr to suitablc Jischargc point,. <br /> ( Other Cast-in-Place Walls <br /> � Convcntional uast-in-pl.icc �v;ills ma}� bc neccssary iin' sm;�ll rctaining ;u�ucturc� locatcd un-sitc. �I�hc <br /> i la�cral suil pressures acting uu convcntiun;il cast-in-placc subsurfacc �valls �vill dcpcnd on thc n�uure. <br /> density and contiguratiun uf the soil bchind the wall and dic amount �f lateral �call mu�'emcnt ��hich can <br /> occur�s b;icktill is placeJ. <br /> � Por walls that :ire frec w yield .0 ihe top at least 0.1 i�crcent of thc heieht oFthe w.ili, suil pressures will be <br /> Ir:� than i(movement is limited by such Gtcturs as �c;ill stitTness or bracin��. :\ssumin_ that the walls :�re <br /> backfilled and draina!,e is pro�ided as outlined in Ihe fullo�cin�_ paragraphs, �ti'e recommend [hat �icldin_ <br /> �� �calls suppurting horirunt:d bachfill be desi�ned using an cyuivalen[ �luid density of ;� pcf(trianeidar <br /> I <br /> distribution), while nun-)'ielJim_ walls supportine horizontal baci:till be Jesiencd usin�_ :m equivalen� <br /> � iluid dcnsi[y of �� pcf (u'ian!_ular distribution). Por sci�mic luading conditiuns. a rcctangular carth <br /> pressure eyu.�l to 71I psf (I;ictored) s'huuld be added to thc �cti��c!at-rest prossures Other surcharee <br /> lundine should bc applied as appropriatc. <br /> � Lat�ral resistaixe ti,r conventiunal cast-in-place ��alls can be pro�idcJ by I�ictional resistantt along the <br /> � base of thc «all anJ p;issive resistance in Gont of the ��:ill. Pur �aalls founded un native soils, thc <br /> .�Ilo�c:tble frictiunal resistance nuiy be compu�ed usine u coefliei�n[ uf friction of Q� applied to vertical <br /> � dcad-I�,nd forccs. The �Ilo�o�ablc p;issive resist;mce may be computed usine an cyuiv.�lent �luid density of <br /> � IOU pcf Itri:meul:ir Ji,u�ihutiunl. l�he ;ibm�c coel�icient ol �i�iction :md p�usi��e eyui��.�lent fluid densit}' <br /> �;ilur� �:in he �nmhinc�l and inci,rporatc ;i �:�c�or uf sulct�� of:ihout 1.�. <br /> i <br /> i <br /> 11, A�� ;U-_�.'-J03-OU ���' P(f�N IJ �'� GEOENGINEEN� <br /> :lucu�r i� -�10( <br />