Toro 4045 - Gathering Site Information

4.Drillthebore.
Youdrilltheborein3stages:
A.Entry
Intheentryphaseofthebore,youpushthedrill
bitandheadintothegroundatanangleofupto
16degrees.Afterpushinginoneormorepipes,
youbegindrillingdownandforwarduntilyou
reachthedesireddepthordepth-gaugehole(if
used).
B.HorizontalReach
Afterreachingthedesireddepth,youpushthe
bitforward,steeringthebittoahorizontaldepth.
Thedrillbitemitsaradiosignalfromthesonde
housing,whichallowsacrewmemberonthe
surfacetotrackthelocationanddepthofthehead
usingthesondereceiverasyoudrillandsteerit
alongaplannedroute.
C.Exit
Onceyouhaveattainedtheplannedhorizontal
reach,yousteertheheadupatananglesimilar
toyourentryanglebringingthebitintotheexit
holeortrench.
RefertoDrillingtheBore(page68).
5.Backreamtheboreandpullbackcablingorpipe.
Afterenteringtheexithole,theendcrewdetachesthe
drillbitandsondehousingfromthedrillpipe.Inits
place,theyattachareamingbitandtheendofthecable
orpipetobepulledthroughthebore.Thereaming
bitisdesignedtoenlargetheboreasyoupullitback.
Asbefore,youpumpdrillinguidthroughthepipe
tothereamingbitasyoupullthecableorpipeback
throughtheboretolubricatethereamerandallow
thecableorpipetoslideeasilythroughthebore.You
continuepullingthepipebackuntilthereamerreaches
thedepth-gaugeholeorexitsattheentrypoint.There
youremovethereamerandproductfromthedrillpipe,
pullingthepipetherestofthewaybacktothemachine.
RefertoBackreamingandPullback(page72)for
instructionsonbackreamingandpullingcableorpipe.
6.Finishtheboreandleavethejobsite.
Aftercompletingtheoperation,youneedtodisconnect
andcleanthemachineandloaditonthetrailer;referto
CleaningwiththeSpray-hoseAttachment(page114).
GatheringSiteInformation
PlanningtheInitialRoute
Beforeyoucanbeginboring,youneedtoplantheroutethat
youwillboreandprepareasfollows:
•Createabasicplanforthebore,mappingoutthe
proposedroute.
–Noteanyobstacleswhichmayaffectthebore,such
aslargetrees,bodiesofwater,buildings,etc.
–Plantherouteoftheboretoavoidasmanyobstacles
aspossible.
–Determinethedepthofanybodiesofwatertobe
crossedtoensurethatyoucangetdeepenoughunder
them.
•Determinethedepththatyouneedtoinstallthematerial
atandtheminimumbendradiusbothofthedrillpipe
andofthematerialbeinginstalled.Thiswillseriously
affecthowlongtheboreneedstobeandatwhatangle
thatyoucanbeginandend;refertoPlanningtheBore
Path(page51).
•Havetheareaoftheboremarkedforutilitylines(inthe
UScall811).Ensurethatalllinesaremarkedonyour
blueprints/boreplanaswell.
•Contactthelocalauthoritiestoarrangeforanypermits
andtrafccontrolthatyouwillneedtoconductthejob.
InspectingtheProposedJobSite
Physicallyinspectthesiteasfollows:
•Notetheterrain,slopes,valleys,hills,andanyfeatures
notplannedforpreviously.
Determinethedegreeofslopeatboththeproposedentry
pointandexitpoint.
•Determinewhatthesoiltypesareintheareaand,if
possible,atthedepththatyouwillbeboring.Youmay
needtodigtestholesatintervalsalongtheborepathto
fullydeterminethis.
•Walktheareaofthebore,lookingforanypossible
unmarkedobstructions.Lookformanholes,pedestals,
oldfoundations,etc.
•Identifyallthehazardsthatyouwillpasswithin3m(10
ft).
48