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i <br /> � . I:�pu;c�l soil aL�nc the ,I��pc bc protcctcd li�nn ;ur(.�c�� cn�di��n u;in�� ��utcrproofuup, nr �i�yuccn <br /> or �lashcu:uin� with shotcrctc. <br /> � • Construction activitics be schcduled so that the IengAi of time the temporarv cut is Icft opcn i< <br /> reduccd to the extent practical. <br /> I • [aosion control mcasures be implemented as appropriate such th:t[ nmoff from thc site is reducc�f <br /> to thc cstcnt practic<d <br /> • Surface ���ater is di�erted a�v��� Gom the escav:uion. <br /> � • "�lie �_eneral conJition of thc slopes be observed periodicnlly b} Gce[ngineers to cun�irm <br /> adequ:uc suibilit}. <br /> I Since thc contractor has control of the consu'uction op�ra!ions, the contractor shuuld be made respunsihlc <br /> for the suibility oFcut slopes, as �vcll as the s;�fety of the esc:i��ntions. Wc su��gest that the contructor limi[ <br /> cunstruetion acticitics ncar !hc basc of thc cut slopes tu thosc th:�t arc absulutcly ncccssar}. "�h� <br /> f conu;ictor�hould make i[ cicar that no person or acti�ity bc .illu�veo at thc top of tlie slopes «'hen �~'orkcrs <br /> ) urc working al th� busc ul thc slopcs. 'I�hc contractor should takc all ncccssar}' s[cps to ensw'c thc s:��ct> <br /> of the ��vrkers ne;u'slopes. :�I I ;horim� �nd tcinpui;iry� slopes must cnnfonn to applic;ible Ioc;iL ;cim .in�l <br /> � fedcr�l safcty rc�;ulatiun,. inclu�lia���I'itic '_')!, A1',A('. I':irt A. "I:�c;i�uti��n. Trcnchinu;mJ Shorm_'. <br /> � <br /> Soil Nail Walls <br /> � CcucraL Soil n.�il ��all; ncn� bc �u��.I I��r thc enliro eara�c ;:nd .AcutR Carc �I nu�cr c>.cuc;iti�ms. I�hc soil <br /> n;iil ���all �ystcm consists of drilling .md �,routing rows uf stccl b�irs or "nail,° bchind thc r�cav,u;un t;icc <br /> ns it is excava�ed and thcn coverine lhe �ace ��'ith reinforced shotcrete. l�he placcment of soil n.iil; <br /> � reinforces [he s'oils lucated behind �he escava[ion face and increases the soil's abiliq' to resist u m:us of <br /> soil li'om sliding into thc c�ca�'ation. It ma}' be nccessary tu utilize vertical cicmcnts. post-tcn�ioned nails. <br /> :md/�r �cmp�rary �ut slop�� in amas �vhcrc looscr soils arc prescnt �nd/or �vhcre ��'all dc�lcctions must bc <br /> Iliinitcd to protcct �ri;tinu improveincnt,. <br /> 1 Suil nail ��'alls :uc t�picall� uscd in compctcnt suils such �u densc to <'cry dciuc gr;inul:ir ,uils or ;tilf'to <br /> � ha�d, low plasticity. �inc-graincd soils. Soil n.�il ��alls .irc Ic;s cnst c(I�ctice in lousc tu mcdium �Icnsx <br /> sands or soli to m�dium s[ill7hi!,h plasticit� fine-�-raincd suil,. <br /> 1 Soil i�:iil walls arc typically constructed us'ine the follo��in�,sequcncc <br /> L Install verti:al cl�mcnts(i:necded) intu venical drilled holes :ind grout hulc �ti'ith I�an cuncr�<<. <br /> 2. G�c:n'ate the sail at the ��all fx� to bet�ceen I and 3 fec[ below the row of soil nails to h� <br /> � installed. Depcnding upon the soil conditions .it the ��nll f:tce, the exca"ation may be complc�ad <br /> �vith a venc�al cut ur :� temporary berm can be utilized. A temporarc I Ii:IV herm (nauve cut ur <br /> tilll e:m be Ieft un the facr ul'the esca�'ation to reducr face iust�bilit}. <br /> I3. Drill, install ;md �rout suil nails. <br /> -1. Gseavate benn. i(pr�scnL located ��ithin ;�bout 3 fect belo�� the eleva�ion uf the soil nail. <br /> � 5. Pl;ice draina�c su ips. stccl �vire mesh andiur reiuforcing bars in front of esr.�v:ucd soil. <br /> � � G. Ins'tall shotcrete and placc stcel plates :md nuts over soil nails. � <br /> . l'omplete nail pullout c�pacity testing on apptvximaroly I out of every _'0 nails in inst:�lkd row. <br /> I <br /> 8. hepcat s[cps� thruu!_h - tor.�ch row �f nails locetcd bclow rhe completed ro�c. <br /> I <br /> , ,_ ;U'_�i.nJ: �)0 ��� � ����5� � GEOENGINEERS� <br /> I .Ir��piv,'i. .Ol�p <br />