Toro 2024 - Planning the Bore Path; Bore Path Planning Steps and Entry Point Determination

PlanningtheBorePath
Beforesettingupthejobsite,youneedtoplantheborepath,
includingthefollowing:
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2
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Figure24
1.Boreentry
4.Obstacle
2.Beginning-of-bore-at-depthpoint5.End-of-bore-at-depthpointandboreexit
3.Boredepth
•Boreentry
Theisthelocationwhereyousetupthemachineandthe
drillbitenterstheground.Dependingonconditions,this
willtypicallybesetback9to15m(30to50ft)fromthe
beginning-of-the-bore-at-depthpoint.
•Beginning-of-bore-at-depthpoint
Thisisthepointwhereyouwanttheutilitylineorpipeto
endafterinstallationiscomplete.Itistypicallythepointat
whichtheborelevelsoutandbeginstoborehorizontally.
Thismaybethesameastheentrypoint,oryoumaydiga
separatedepth-gaugeholeatthispoint(Figure24).
•Boredepth
Thisthedepthatwhichyouwanttoinstalltheutility
lineorpipe.Thismachineisdesignedprimarilyfor
installationsbetween1and3m(3.5to10ft).
•Obstaclesinthepath
Itisimportanttoknowwheretheknownobstaclesare
thatyouwillneedtosteeraroundorunderbeforestarting
sothatyoucanplanwheretobeginsteeringpriorto
reachingtheobstacle.
•End-of-bore-at-depthpoint
Thisisthepointwhereyouwanttheutilitylineorpipe
tobeginafterinstallationiscomplete.Oftenthiswillalso
betheboreexit.
•Boreexit
Thisisthelocationwherethedrillheadwillexitthe
groundandthepointatwhichyouwillpulltheutilitylines
orpipeintothebore.Ifthispointwillbeatthesurface
insteadofatinstallationdepth,youwillneedtodetermine
thedistancefromtheend-of-bore-at-depthlocation
neededforsteeringthedrilltothesurface,typically9to15
m(30to50ft)fromtheend-of-the-bore-at-depthpoint.
DeterminingtheBoreEntryPoint
Oneofthemorechallengingaspectsofplanningthebore
pathistodeterminetheentrypointofthebore.Youneedto
takethefollowingtraitsintoaccountwhendeterminingthe
locationoftheentrypoint:
•Boredepth
Thisthedepthatwhichyouwanttoinstalltheutility
lineorpipe.Thismachineisdesignedprimarilyfor
installationsbetween1and3m(3.5to10ft).
•Pipeandmaterialexibility
The3m(10ft)pipesusedonthismachinecanextoan
8%pitchoverthelengthofthepipe;thisequatestoa
bendofnomorethan20cm(8inches)offofastraight
path(Figure25).
Important:Ifyousteerthepipetobendsharper
than20cm(8inches)perpipe,youmaydamagethe
pipesandtheirconnections.Youmustalsomake
steeringchangesgraduallyovertheentirelengthof
eachpipe.Ifyousteerthewhole20cm(8inches)
inonly25to50cm(1to2ft)oftravel,youwill
permanentlydamagethepipes.
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