建筑工程灌注桩中英文对照外文翻译文献.docx

建筑工程灌注桩中英文对照外文翻译文献.docx

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建筑工程灌注桩中英文对照外文翻译文献

（文档含英文原文和中文翻译）

中英文资料外文翻译文献

Boredpile

Summary

Drill（flushing,dig）pilefromthenineteensixties,beginninginHenanprovinceNanyangregionsincethedevelopmentapplication,becauseofitsmanyadvantages,hasbeenwidelyusedinsoftsoil,loess,includingsoil,expansivesoilandotherspecialtypesoffoundationandindustrial,civil,municipal,railway,highway,portandothertypesofEngineeringpractice.Andprecastpile,boredpileconstructionofnonoise,novibration,onthesurroundingbuildingsandsmallenvironmentalimpact,pilediameter,burieddeep,largebearingcapacity.China'sdrillingpilemaximumdiameterofpilehasreached4000mm,maximumdeeppilehasreached104m,andthesteelpipepilemaximumdiameterof1200mm,thelargestpileofprestressedconcretepipepilewithdeep83m,maximumdiameterof1300mm,thebiggestpiledepth40m.

Alongwithourcountrysocialistconstructionisbooming,withhigh-risebuildings,largespanbridgesontherise,thebearingcapacityofpilefoundationwithhigherrequirements.Largediameterboredpilethereforegetsrapiddevelopment,pilelengthandpilediameteralsodobiggermore.However,intheexistingvariousmethodsofpile,boredpilehasmanyadvantagesandiswidelyusedinconstruction,butitishardtoavoidtheimpactofmud,whichnotonlyreducesthebearingcapacityofpileexpectations,butalsocausedaseriouswasteofmaterials.Manualholediggingpileisdifficulttoachievegreaterdepth,itsbearingcapacityisalsodifficulttojustasonewishes.Inviewofboredpileinthissituation,howtoimprovethepileconstructiontechnologylevel,maketheinputmaterialtobemorereasonabletouse,soastogreatlyincreasethebearingcapacityofsinglepileinengineeringfield,havebecomehotissuesinrecentyears.

Theintroductionofboredcast-in-placepile

Perfusionpilereferstotheconstructionsitebymechanicaldrilling,steelpipesoilcompactionorhumanminingmethodinthefoundationpileholeinform,andonitsinnerplacedreinforcementcage,concretemadewithdifferentpile,drillingmethod,groutingpilecanbedividedagainforcast-in-placepile,boredpileanddiggingseveraltypesofpiles.Boredpilebypileintothedefinitionandclassificationofakindofpile.

Thecharacteristicsofboredcast-in-placepile

1、Andsinkingpileofhammeringmethod,constructionnoiseandvibrationissmaller

2、Toconstructthantheprecastpileoflargediameterofpile

3、Inallkindsofgroundcanbeused

4、Theconstructionqualityofthepilebearingcapacityinfluence

5、Becausetheconcreteisinthemudperfusionisdifficulttocontrol,sothequalityof

concrete

Boredpileconstructionmethod

Percussiondrilling,punchinggrabbingdrillingandrotarydrillingholecanadoptslurrywallconstructionmethod.Theconstructionprocessis:

siteformation,slurrypreparation,buriedtubeandlayingworkplatformrigandpositioning,drilling,holecleaningandinspectionofholequalityandlowersteelcage,underwaterconcreteperfusiontopulloutthebarreltocheckquality.Constructionsequence：

（1）theconstructionpreparation

Constructionpreparationcomprise:

selectingdrill,drill,layout.Constructionofboredpiledrillingrigisthemainequipment,accordingtothegeologicalconditionsandvariousdrillingmachineappliedtoselectconditions

（2）drillingmachineinstallationandpositioning

Istallationofdrillingmachinebasedifnotstable,easytoproduceinthedrillingmachineconstruction,pileandpileinclinedinclinedeccentricandotheradverseeffects,thereforerequirestheinstallationoffoundationstability.Ontheformationofsofter,slopingground,bebulldozed,thepadplateortiereinforcement.

Inordertopreventthepilepositionallowed,constructionisveryimportanttothesetthecenterpositionandthecorrectinstallationofdrillingmachine,therigdrillingmachine,firstuseofthepowerdrillandnearthecagewiththedrillpipe,movingroughlyposition,andthenJackrackjacking,accuratepositioning,sothattheliftingpulley,drillbitorfixeddrillholecardsandcasingcenterinaverticalline,inordertoensuretheverticalityofthedrillingrig.Drillingpositiondeviationisnotmorethan2cm.Alignedwiththepilelocation,withsleeperflatdrillbeamatthetopofthetower,andsymmetricaltothedrillaxispullingcablewindrope.

（3）buriedtube

UndergroundwaterlevelbelowtheKongBituunderthehydrostaticpressuretotheholecollapse,andeventhephenomenonofflowofsand.Ifyoucankeeptheboreholewallhighundergroundwaterhead,increasetheholehydrostaticpressure,topreventcollapsehole,holewall.Casinginadditiontoplaythisrole,atthesametime,goodisolationofsurfacewater,ground,protectingtheorificepileholedrillguidefixed

（4）slurrypreparation

Drillingmudiscomposedofwater,clay（bentonite）andanadditivecomposition.Afloatingdrillingwasteslagcoolingthedrillbit,drill,lubrication,increasinghydrostaticpressure,andintheholewalltoformaslurry,partitionwithintheboretopreventseepage,theholecollapseeffect.Modulationofthedrillingmudandcirculatingpurifyingmud,shouldbebasedonthedrillingmethodandformationconditionstodeterminetheslurryconsistency,slurryconsistencyshouldbeconsideredstratigraphicchangesoroperationalrequirementsofmotorcontrol,themudistoothin,small,pooreffectofeliminationofslagwall;slurryistoothickwillweakenbitimpactfunction,reducedrillingspeed.

（5）drilling

Theboreholeisakeyworkingprocedure,inconstructionmuststrictlyaccordingtotheoperatingrequirements,inordertoensuredrillingquality,attentionmustbegiventotheholequality,mustbeoppositeforthisgoodmidlineandverticality,andpressedwellcasing.Mustpayattentionintheconstructionarecontinuouslyaddedandpumpingtheslurryslag（impacttype）,butalsoatanytimetocheckwhetherthereisdeviationphenomenonintohole.Usingtheimpulseorclamshelltypedrillingmachineconstruction,soilduetovibrationandimpactneartheadjacentholestability.Sothedrilledholeshouldbetimelycleaninghole,decentralizationandpouringunderwaterconcretereinforcingcage.Drillordershouldalsobepracticaltoplan,shouldnotonlyguaranteeapileholeconstructiondoesnotaffectthelastpileholedrill,andthemovingdistanceofnottoofarandmutualinterference.

（6）theholecleaning

Thedrillingdepth,diameter,locationandshapeofholeisdirectlyrelatedtothequalityofpileandpilebodyblack.Therefore,inadditiontodrillingprocesscloseobservationsupervision,tomeetthedesignrequirementsindrillingholedepth,withdeep,hole,poreshape,poresizeandotherinspections.Intheendholeinspectioninfullcompliancewiththedesignrequirements,shallimmediatelyproceedtobottomholecleaning,avoidittoolongthatmudsettling,causedbyboreholecollapse.Forfrictionpilewhentheholewalliseasytocollapse,inunderwaterconcreteperfusionbeforethesedimentthicknessofnotmorethan30cm;whentheholewallisnoteasytocollapse,notmorethan20cm.Forthepost,inwaterorshootthebreeze,sedimentthicknesslessthan5cm.Holecleaningmethodistousedifferentandflexibleapplicationofdrillingrig.Usuallyyoucanusenormalcirculationrotarydrillingrig,reversecirculationrotarymachinevacuumsuctionmachineandslagpumpingcylinderholecleaning.Themudsuctionmachineholecleaning,requiredequipment,convenientoperation,holecleaningisthorough,butunstableinthesoilshouldbeusedcautiously.Itsprincipleistousecompressorgenerateshighpressureairintoasuctiondredgepipelinewillmudblowing.　　

（7）pouringunderwaterconcrete

Afterfinishinghole,canbeprefabricatedreinforcementcagehangingverticallyintothehole,positioningtobefixed,andthenusingaperfusioncatheterconcrete,pouringconcretedon'tinterrupt,orpronetothephenomenonofbrokenpile.

Effectofboredpilebearingperformancefactors

Intheconstructionprocess,constructionmachinery,duetogeologicaleffects,oftencausedbypilesoil（weaklayers）,thethicknessof0.2~0.5m,thickandupto1m.Especiallyinsoftsoilwithmud,drilling,holebottomsedimentisinevitable;evenaftercarefulcleaninghole,theholecleaningafterandbeforeconcrete,willprecipitatesomesediment,andindrillingprocess,widespreadpresenceontheholewallandtheholebottomsoildisturbance.Alloftheseaffectthebearingcapacityofboredpileplay.

Pilestaticloadtestshowthat,boredpileendbearingcapacityofonlytheultimateloadofthe15%~35%,thesideresistanceandtipresistanceoftheexistingsynchronizationphenomenon.Givefullplaytotheroleoflateralfrictionresistanceisonlyafewmillimetersofthedisplacementofpiletop,togivefullplaytotheroleoftipresistanceofpilediameter,neededtoreach10%-30%ofthedisplacementofpiletop.Suchalargedisplacementinengineeringisnotallowed.Pilesidefrictionresistancetodamage,andthedamagelimitisreached,andtheendresistancecannotgetsufficientplay,itspotentialisgreat.Thisistheultimatebearingcapacityofboredpileisnottocause.

Researchshowsthat,atthebottomofpilesoilexists,notonlyaffectsthetipresistanceoftheplay,alsomakethesidefrictionresistanceloss.Theexistenceofweakinterlayerofpile,thepilebodyandthesoilfrictionbetweenthenatureofthechange,thefrictionbetweenpileandsoilbyloadtransfer,isverybad.Thisistheboredpilebearingnottallbenefitisanotherreason.

Improvethebearingca