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2007_0709CA.pdf �
Technical Archives
DATE:9July2007
CLIENT:TheTrenchlessCompany,Sacramento,CA
JOBLOCATION:AgilentTechnologies,SantaClara,CA
JOB:200'sewersectionreplacementunderparkinglotdividerplantedwithmatureredwoodtrees,replacing8"VCPlinewith8"SDR�7PE,pullingupstream
SPECIALCONDITIONS:Product testing new 8" Footage/TRIC Unified Force impactor head
TOOLS:WC22hydraulicram,Case580backhoe
PROJECT LOG
2007_0709CA.pdf 2
530�StevensCreekBoulevard,SantaClara,CA
2007_0709CA.pdf 3
Sewerrunsunderlot/lanedividerplantedwithmaturetrees.
2007_0709CA.pdf �
Fusionandlandingareaonlotside.
2007_0709CA.pdf 5
Viewfromentryend(downstreamexcavation).
2007_0709CA.pdf �
Entrypitis�0to�2feetdeepwithshoring.Existingclaypipeisbeddedinsand.Sewerwaslinedfromthispointtolowermanhole20-30feetdownstreaminordertoavoidexcavationorburstingaroundlargewatermaincrossingsewerpath.
2007_0709CA.pdf 7
Usingjettertoretrieveandpullback220’ofairhose.
2007_0709CA.pdf 8
Attachingairhosetojetterhose.
2007_0709CA.pdf 9
Feedingbackairhosefromheadend.
2007_0709CA.pdf �0
Airhosearrivesattailend.
2007_0709CA.pdf ��
Impactorattachestohoseandthenslidesintosealedburstinghead.
2007_0709CA.pdf �2
Drillingandsecuringpipetoheadwithsetscrews.
2007_0709CA.pdf �3
Attachedtostandardclevisandreadytotest.
2007_0709CA.pdf ��
WC22ramsetonpulleybaseinexitpit,readytoinsertcable.
2007_0709CA.pdf �5
Pullerisremovedwhencableclevisapproachespulleywheel,thencableisdetachedandreplacedwithachaintohooktobackhoebucket.
2007_0709CA.pdf ��
Shoring/excavationisperpendiculartopipeline,sospaceislimitedforbuckettopullwithhammerassist.
2007_0709CA.pdf �7
Directing force in line with pipe in deep, confined space is difficult.
2007_0709CA.pdf �8
Pullinganothertwofeetorso,withimpactor.
2007_0709CA.pdf �9
Whenheadispulledasfarasspaceallows,backhoeismovedtoentrypitforattemptedpush.
2007_0709CA.pdf 20
Cuttingpipeinentrypit,beingcarefulnottocutairhose.
2007_0709CA.pdf 2�
Pushingwithhammermakeslittleornoprogress.
2007_0709CA.pdf 22
Headassemblyismovedtocompressortoattemptremovalofimpactor.
2007_0709CA.pdf 23
Hookingimpactoruptoairsupplyaftersettinghammerinreverse.
2007_0709CA.pdf 2�
Impactor is firmly wedged inside head.
2007_0709CA.pdf 25
Stillnoseparation.Applyinganti-seizeonimpactorshaftpriortousemightfacilitateremovalafterjob,orperhapsstandingtheunitonitsnoseagainst a solid surface would help the hammer release itself. Otherwise, modification of mating surface inside mole may be in order.