引孔静压桩施工技术存在问题及对策研究Word文档格式.docx

引孔静压桩施工技术存在问题及对策研究Word文档格式.docx

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China19smeltinggroupCo.,LTD.315807;

Abstract:

thestaticpilebecauseofitsmanyadvantagesintheurbanconstructionandgetdaybydaythewidespreadapplication.Firstlyexpoundsthepipepileconstructiontechnology,ledtheresearchbackgroundandstudyholesignificance,proposeleadholestaticpilemethodconstructionmethod,thispaperanalyzestheactualconstructionofpile,suspendedinthepilebreakingpile,thephenomenonsuchasallkindsofreasonsandputsforwardthecorrespondingsolutionsandtechnicalmeasuresaimedatothersimilarprojectconstructiontohavethecertainreferencereference.

Keywords:

leadtheholestaticpileconstructionproblems

Incivilengineeringconstructionprocess,thefirsttothefoundationconstruction.Pilefoundationisconstructionespeciallyhighbuildingconstructionismostcommonintheformoffoundation.Formationofthepilefoundationoftheprocesstoworkwiththemechanicaltocompletethepile.Thesuperiorityofthestaticpressurepilegotthegeneralagree,butwhenconstructionhassomemustovercometheproblemasoilcompactioneffectonsurroundingenvironment,constructionworktimebodyrough,pilebodytilt,clippilebreakageandpilebodybreak,airframeistoobig,motorperformanceispoor,intelligenttestsystemblank,etc.Forhowtoensurethestaticpilingpressurepilequalityandtheimprovementofthepilemachinestructureisaseriesofproblems,suchaspilemachinedesignresearchersconstantlytoexploreandinnovate.NowisZhongYehomebuyersnanjinginhexiLianHuaCunfavouringoverwhelminglysection1residentialareaAbasementcivilairdefence（basementsection）asanexampleforresearch

1projectsummary

China19smeltinggroupCo.,LTDZhongYebuyersofundertakeninhexiLianHuaCunnanjinglow-costhousing1residentialareaAsectionofcivilairdefencebasement（basementsection）,A01#~A03#,B01#~B03#,D01#~D02#（residentialbuildingshave2floorsundergroundstructureresidentialbuildings,thehighestelevationfor+98.950（relativeelevation）,residentialfoundationexcavationlowestelevationfor9.950（relativeelevation））,commercial2~commercialfourthfloor,nanjingcity,jiangsuprovinceislocatedintheJianYeOuhexinewdistrictbarstreetLianHuaCuneconomyapplicableroomBgroupwithinAping,nearthecityofnanjingroadandthenorthJianYeOuhexinewdistrictadjacenttothenanjingsandbarsstreetLianHuaCuneconomyisapplicablehousingisAgroup,eastneighbourNaHe,nationalhighway205andadjacenttothedimnessoftheplanning,geographicunitbelongtotheYangtzeriverfloodrightbank,fishponds,dottedwithrivervalley.MainfinishforcivilairdefenceareaAbasement（basementsection）andsixbuildingsof34residentialbuilding（A01~03,B01~03）,126floorsbuildingresidentialbuilding（D01）,1A24/30layer（D02）,3residentialbuildingAlayer2businesses（

（2）-（4））,thestructureofthebuildingandwatersupplyanddrainageandfirewater,electrical,andhvacandotherprofessionalinstallationofconstructionoftheproject.Siteiserodingtheresidualgeomorphicunits,thefoundationsoilsoillayerareforartificialfillintheproductlayer（miscellaneousfillinthesoil,grainfilling）,thefourthphasedepositionoflakepondlayer（mud）,thefourthisnewalluviallayers（clay,themuddysiltyclay,siltyclay,siltyandsand,

siltysandlayercrisscrossdistributionetc）,etc.Inthefieldofgroundwatertypeshaveisdiving,poreconfinedwaterandbedrockfissurewaterthreetypes.Divingoccurinartificialfillintheproductlayer,precipitation,surfacewaterinfiltrationisthemainsourceofsupply;

Theporewaterpressureinthefourthoccurrenceofnewalluviallayersofsiltyandsand,siltysand,sandandgravelinlayer,theupperwaterpenetrationandlateralsupplyisthemainsourceofsupply;

Theoccurrenceofbedrockfissurewaternextvbedrockrockfracture.Divingstablewaterlevelis0.00~2.10mdepth,equivalenttoabsoluteelevation5.30~7.35m,theporewaterpressurewithmicroconfinedsex,itistobuildthepressureheadburieddeep3.52~3.81m,equivalenttoelevation3.20~4.21m;

Bedrockfissurewateroverallseelittlewateranduneven.Theartificialfillintheupperlayerdepositionmiscellaneousfillearth,grainfillingastheunconfinedaquifer,goodpermeability,itsclay,themuddysiltyclay,siltyclaysoil,powderforrelativelyimpermeablelayer,whenthefoundationpitexcavationdepthof6.50m,thefoundationpitwatermainlyfrommiscellaneousfillinthesoil,grainfillingdive.Accordingtotheinvestigationreport）,theartificialfillintheproductlayermiscellaneousfillinthesoilofthepermeabilitycoefficientof6.20m/d,grainfillingthepermeabilitycoefficientof0.35m/d.Explorationpointbelowtheplanelocations:

Mechanicaldrillingpilemethodinprocessingplantbeforesomecitybuildings,nearbytheroad,densenearbyundergroundpipelinetoinfluenceandpiletipthroughthickhardclipsoillayer,allhavemoresuccessfulconstructionexperience.

2residentialareaAbasementcivilairdefence（basementsection）bringholeengineeringanalysis

2.1projectsurveyanddesignconcept

Planningdesigntriestofollowthehumanist,theecologicalenvironmentoptimizing,economicbenefitandsocialbenefittheprincipleofequalimportance.Fullconsiderationofthelocalfarmers’livinghabits,makefulluseofgoodconstructioncondition,fullyembodiesthemoderninnovativeandadvancedidea,will“city,architecture,space,thehumanities,the

environment”fullythefusion,willthisblockdesignbecomethenewcenturybecominglargerandmorestandardFanHua,theecologicallivingcommunity.1）forwardcombination,fullconsiderationstage,blockdesignandfeasibilityoftheimplementationoftheprinciple.2）modelvillagefeatures,abandonthefancyplane,andpayingattentiontotheresidentialhouse,architecturalformwithurbanstyleandthecoordinationofurbanstreetview.3）theoptimizingenvironmentandecology,inimprovingthelandeconomicbenefit,andimprovetheinternalenvironmentqualitycommunity,creatinggoodgardencenter,walkgreenbelt,greennodeandrichlevelsoflivingcultureenvironmentspace.

2.2geotechnicalengineeringgeologycondition

Investigationpurposeandrequirement:

civilairdefenceofresidentialareaAbasement（basementsection）thedetailedsurveyforthegeotechnicalengineering.Thepurposeofthesurveyandrequirements:

1）findoutbadgeologicaleffects,thetypesandthecauses,distribution,developmenttrendandharmdegree,putforwardtheSuggestionsrenovationscheme;

2）findoutwithinthescopeofthegeotechnicalconstructionsite,thetypesofdepth,andthedistribution,engineeringcharacteristics,andanalysisandevaluationofthefoundationstability,uniformityandbearingcapacity;

3）findoutoftheriver,ditchburiedshore,grave,shelter,suchasengineeringof

adversetoseokjeonglandburied;

4）findouttheburialconditionandgroundwater,changelawofundergroundwaterlevelandprovidechangerange,determinethegroundwaterofbuildingmaterialsofcorrosive;

5）discriminantsitetypeanddiscriminantsaturatedsandliquefaction;

2.3leadholehomeworkconstructionprocedure

（1）measuringunreeling,determineaccuratelythepilelocation;

Understandingthepileishardlayerburieddepth,thickness;

High-pressurerotaryspraydrillingemplacement,leveling,preparationbentonitemud.

（2）high-pressurerotaryspraydrillrig,andlowpressurewaterinjectiontrip,waterinjectionpressure20MPa.Thedrillwiththesidesinjectionholeareallinjectionwaterflow,easytodrilldown.Leadholepurposeistoprovidepilingthehole,theengineeringpilesstronglyweatheredgranitelayerssmoothlythroughthedepthtomeetthedesignrequirements.Bythebuilderofpay-offdetermineapile,andthecontrolpointleadtonottointerferewiththepositionofthedrilling,drillingafterthecompletionofthepileresettoacontrolpoints,aspilingbasis.3）verticaldegreecontrol:

leadtheholesintheverticaldegreedirectlydeterminetheverticaldegreeofengineeringpiles,soverticaldegreeofcontrolisthekeylink,especiallyafterpilingmachineisinplace,thefirstquarterofthedrillpipecontrolshallbeapprovedbytheZhiAnYuanreviewqualifiedrearcanspud,everyincreaseaquarterafterreviewofaverticalpipe.4）intoaholequalitycontrol:

drillingprocessshouldbebasedonthegeologicaldatareportthesituationtopaycloseattentiontothesoilandwaterlevelchangesindrilling,ifdiscovertheundergroundhaveobstaclesshallbeimmediatelystoppedfootage,thecauseswerefoundoutbeforeyoumoveontotheconstruction,suchasthecaseofcoarsesandsoilcontainingmoreshouldbetimelytoaddthemud,andthickstrarchcirculation,ensuredonotproduceholecollapsephenomenon,

3leadholestaticpileconstructionmethodtechnicaldifficultiesand

countermeasures

3.1leadapileholetheproblemandcountermeasure

Themainreasonis:

1）withoutthelevelingofthefuselage.2）thegroundbadflatnessorlowbearingcapacity,easytocausethefuselagelostflat.3）theoriginalsiteforoldbuildingdemolition,thebasalbackfillsoilcontainsasmallamountofrubble,brokensiliconpiece,ifpilingappearedintheprocessofpressureriseorpileinvain;

suddenly,itmaybethesoilhaveirregularrubble,brokensiliconcarbideblockandsoonthings,shallbeimmediatelystoppiling,usefirstartificialorexcavatordugrearcancontinue