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I <br /> I <br /> � Optical Survey <br /> � I�he shorine moniturinu pro�r;mi shauld ineluJe un optieal sun�r�� monitorin� proerum. �I�he <br /> mcommended freyuenc�� of monitonm� should �.�rv .0 :� �iinction of the sta��� of constniction as presentcd <br /> in thc fullo�vinu t:�blc: <br /> IConstruction Stage _� Monitoring Frequency <br /> During excavation and until wall movements have stabilized � Twice weekly <br /> I �Dunng excavation rf lateral wall movements exceed 1 mch antl�until i � Dady� <br /> wall movements have stabil¢ed <br /> .. ...._._. ..._. ______ — __ _ . . .._ ._ . . . <br /> Afler excavalion is complete/wa!I movements have stabdized and prior Twice monthly <br /> to Ihe fioors of!he building reaching the top of the excavation <br /> I �luniturim, shuuld includc vertical and horizontal survcy mcasurements accurate N at leas[ 0.01 ie�t. <br /> r� basclinc rcadine of the monitoring points shotdd be comple[ed priur [o beeinning shorin� installation. <br /> II'hc survcy daci should bc providcd to GcoGnginccrs for revic�v within 2d hours. <br /> Por shorine walls, �ve recomm�nd that optical survey points be established along the top uf the shurine <br /> � walls, at dic curb bchind thc nurth und south ���alls, and on existinu buildines Iocatcd ��ithin a horirontal <br /> dis[:mce of the shoring �valls equal to (hc hci�hi uf the wall. The su�-cy poinu should be spaced ecery <br /> 3� fcet alung thc ���ull facc and dic points ❑long thc curb linc/c�istin�� buildin�s should bc locntcd <br /> I immeJi:itcly bchind thc points along the top of[he �t'all. :ldditional survey puints should also be installed <br /> ;u mid-hcieh[ of the �vall as Ihc e�c:natiun proeresscs if lateral movements e�cecd 1 inch, at the sa�nc <br /> spacing as the points ;ilong Ihe top of the wull. If larerol �call movcmcnts :�m obscn'ed to be in e�cess of <br /> � '/_ inch behveen successive readings ur il total �eull mo�ements a�ceed I inch. consvuctiun of the shoring <br /> «�alls should bc stopped Iu dctvrminc the cnu;e ol th� n�u��cmcnt und to csmbli;h thc t��pc and c�tcnt o( <br /> rcmcdi:tl mcusures ryuired. <br /> I <br /> i <br /> i <br />� <br /> I l�ii,�C.� iU",1��1U�-UU Pa];dC-d GEDENGINEERS� <br /> .-IuGu.v i�1. :0Uo <br />