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' .� --- - �--�� .� <br />: <br />� <br /> � �� ' �v' � <;;' 6. .� '�S f! <br /> �' c�a , � ` C���'v��6� � <br /> ,�s�� ����ca���es ar��:. <br /> ;����'��" � GEOTECHNICAL ENGINEERING <br /> Novembcr 19 , 1974 �� �; ;;� I.. , I� �;' <br /> J-139-00 <br /> ; i�„ <br /> i' � <br /> Stevens , 'Chompson & Run}�an, Iilc . <br />�. 700 Plaza 600 <br /> SeaCLle, I•:ashingCon 9 ,1U1 <br />� Attn: �1r. Ray Upsahl <br /> Re: �verett- Transfc,- Str�Cion <br />, Snohomish Goi.nCv, l;'�ishir;Co❑ • <br />� <br /> Gentlemen: <br />� PursuanL Lo ��our requcst , �:-c h�u-c: e��alu�.�ed ehe usa o;- �lri_ven <br />' 10- to 12-inch di.a:ne�er. pipe piles , ha��irg a dcsign Ucari.ng <br />' capaciLy oL 50 tons per pile , Lor supi�orL ut Che aUove reter- <br /> enccd sL-ructure . Sde r.ecouunen�l ChaC pipe piles Ue dri_�>cn c1os�:l � <br /> end and Ue concrete Lilled Lollo�ai.ng sufficienl drivi.ng and in- <br /> specLion. Provisions should Ue m�de Co �rovide a conical oz <br /> special pointed tip Lo Che clo�ed end pipr_- to Laci-liCaLe dri�-in} <br /> i thr.ough the Uuried demoli.li-on deb:�-is 1.i}�er. . The clloice oP Ch�. <br /> Lip should Ue ].eLL to the conLracCor. Pbllo�.ing clriving , Chc <br /> structural inte�rity of the pile should be inspecLed by droppin� <br /> a ligl:t to the Uottom of the pipe. <br /> Both 10- and 7.2-i.nch di.ametcr. Pipc Pi.lcs , i.n ou1' npi.ni.on , �•:ould <br /> dcvelop Lhe 50- Con capaciCy �aiLh pen�Cr.�Ci.on clepChs ot 70 Co 75 <br /> fcrC l�elow existing �iCe �;racic . We re.:ouunend th,iL pi.pe pilc <br /> r_apaciLi.es , based upon driving resisLan:.c , Lu deLcri:u.n�d b�� ehc <br /> following So pile driving Lormula. <br /> � � (� C� ddC� � <br /> NOV 22 1G'4 <br /> DEPT. OF PUBLIC VYORKS <br /> -i0'i1J [ Mr1RTHLAKEWA'l. ';E.l,iR(- '.....6I '�,.Itv�. �7r�C15'-';-7'l!'� <br /> ..�. ,bdU(,TI�f: FLA. , �u�. � .. . Il.' . . .. , .�I ...�._ . ,. .�,. .. ,, <br /> . ,Il. i�i�.i.L i2��,� .:. , . . <br /> / <br /> i <br /> L.,..-._�_.._ __,_ __ .____ ..._..`..__._�.�_.,_..._�_.�.e.....--,_�_�.._—; __.. . . _ <br /> I <br /> . . . . __ _ _ ����. . — – .... _ . _ " . _ '_.� = <br />