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_ — LSI Ada�r1 <br />caving and rtivcling of ihc picr shaft xide�vali. Ground�vatcr ���as encoun�ercd al �his lacatiun G-leet bgs a� <br />Ihc linte of our tes; no����s. n�n�„�i��,�. on the deptli of pier penelrntion, dewatcriug �ti�ould likely be <br />rcquircd al this locatiun. Shotdd hcavy gruund���aler bc cncuunicrcd during drilling, it will be necessmy to <br />purop the �iccunmlated .!rnund�vnter prior to picr concrele placemcut. Allerntvively, Ihe use of beqinpile <br />slurry could i�e utilized lo smbilize Ihe drillcel picr excavalion. <br />As �� minimutn, �vc recommend tlial the drilling conh.�ctor havc a cle:�nout bucke� ou silc lo reinove loose <br />soils ancUor mud from dic bonom of Ihc pier. \Ve recommcnd �hat �hc limndaiion concrctc bc h�emicd <br />ii'an the boUom nf the Iwle ro displace Ihc �enler and minimize ihc risk of contnminaling the cuncrctc <br />mix. The Drillcd Shatl Mauual publishcd by Ihe Peder,il hligh�v;ry ndminishntion rceommends �hat <br />conerete be placed by �remic methods if morc lhan 3 inches o( water has accunud�iled in Ihe eccavation. <br />Strircrmvd Fi!! <br />The follotving commrnis, recommend,rtions, and conclusions regarding vlrunwal lill �uc providcd fur <br />design nnd construction pu�ioscs: <br />Matcrials: Suuctur.il 411 includes any GII m;dcri;ds placed unJer fumings, paventculs, drive���nys, nnd <br />otlicr snch sinicttires. Typical mnlcrials uscd ior sU'uchir.il fill includc: cican, �vcll-gradcd sand ��nd <br />gra��el (pil-nm); cle�m sand; crushed rock; conUolled-densiry fill (CnP): Ieau-mix concrete; and variuus <br />soil ntistures of silt, sand, and gtuvcl. Recycled concrele, asphah, and glass, deri��ed liom pulvcrized <br />parem matcrials may:ll$O I1C IISC(I 8S ShUCILfiII �III. <br />1'laccmcnt and Compaciion: Generall��, CUF, :IIIII IC�11-IIIU CUI1CfCIC (IO 110� fl'(�UIPI' ti�ll'C18I �)Iacemcnl aud <br />contpaciion proceduces. In conh'nsl, ��it-run, sand, crushed rock, soil misaucx, ancl recycled m;uerials <br />should be placed in horizon�al lills nol excecding R inches in loose thickness, nnd e�ch lifl slioul:l bc <br />ihoroughly compactcd ��-illi a mcchanical crnnpaclor. Using tlte madificd Proctor masimum diy dcnsity <br />(ASTM: D-IS$7) as a st�md�vd. �vc recommend ihet suticlural fill used t'or �.vious oit-sitc applicatious be <br />contp�+cicd to Ihe li�lloiving mininnnn densilics: <br />�ill Aunlicnliou <br />SIaUlPooliug suber�{dc <br />Grivcl driec subgradc (upper I liiot) <br />Gravcl drivc suhgr;idc (helow I foot) <br />Min(mwn Cnmu�cliun <br />'JO perccnl <br />95 percent <br />90 percent <br />Snl�er.ides and 'fesiin�: Regmdless of loc:ition or material, all suUciural fil! should be placed over finn, <br />unyielding subgradc soils. Nrc recommend ihai a rcpresen�nti.- from Adapt bc rciaincd In uhser��e Ihe <br />condition of xuhgradc soils bef'orc fill plxemeni bcgins, and 10 perfonn a serics of' in•placc dcnsiiy tesls <br />durin� soil fill placemenl. In this �vny. tl�e adryu;ic�� ul'soil cumpactinn elliirts m;q� bc c�•alu�led as <br />cai�h�vork progresscs. <br />\'criiun U'irelo� Augus14.2003 � <br />.\J:ip� fYnl�•�� n�. \1�.\Il.i-Y77J Pngc � I� <br />