基础施工技术要求英文翻译.docx

基础施工技术要求英文翻译.docx

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基础施工技术要求英文翻译

TECHNICALSPECIFICATIONSFORCONSTRUCTIONQUALITYOFBUILDINGGRADE&FOUNDATIONS

1keypointSofqualitycontrol

1.1Basicconstructionconditionsofbuildingfoundations

1.1.1Geotechnicalexplorationdataofrockandearthengineering.

1.1.2Thedesigndocumentandothertechnicaldocumentsareavailable,theconstructiondrawingshavebeenjointlycheckedup,thenecessarytechnicaldeliveryandtraininghavebeenaccomplished.

1.2Earthwork

1.2.1Generalrequirement:

（1）Balancecalculationonexcavatingandfillingshouldbeaccomplishedbeforeearthworkconstruction,consideringminimumtransportingdistance,reasonabletransportingpathandreasonableconstructionprocedureandotherfactorssynthetically,properlyallocatetheearthwork,reducerepeatedexcavationandtransportation.

（2）Grounddrainageanddewateringshouldbedonebeforeexcavation

（3）Thegradientofthesitesurfaceshouldbeinaccordancewithdesigningrequirement,ifwithoutspecificrequirement,thegradientofdrainagedirectionshouldnotbelessthan2‰.Thesitesurfaceshouldbecheckedperpoint.Setonecheckingpointevery100~400m2,andcheckpointsshouldnotbelessthan10points;set1pointevery20matlength,widthandedgeslope,notlessthan1pointeachside.

（4）Theplanposition,levelelevationandsideslopegradeshouldbemeasuredoftenduringearthworkconstruction.Reliableprotectingmeasurementshouldbeappliedtoplan-controlpilingandlevel-controlpoint,andcheckorreviewshouldbedoneperiodically.Soilshouldn’tbeplacedattheedgeoffoundationpit.

1.2.2Excavationofsoil:

（1）Beforeexcavation,setting-out,drainageanddewateringshouldbechecked,andtransportingroadofvehiclesanddumpareaofsoilshouldbearrangedreasonably.

（2）Theconstructionscheme,environmentprotectingmeasurementandsupervisionschemeshouldbeworkedoutaccordingtoexcavatingdepth,geologicalconditions,constructionmethod,environment,projectperiod,climateandgroundloadingandotherinformation,andtheexcavationoffoundationpit（groove）andundergroundpipingtrenchshouldapprovedbygeneralcontractorbeforeexcavation.

（3）Checkplanposition,horizontalelevation,gradeofsideslope,compactness,,drainage,dewateringsystemduringconstruction,andobserveenvironmentalchangesfromtimetotime.

（4）Sideslopevalueoftemporaryearthworkexcavationshouldbeinaccordancewiththerequirementofthefollowingtable1:

Table1Sideslopevalueoftemporaryearthworkexcavation

Sortofsoil

Sideslopevalue（Height:

width）

Sandysoil（notincludingfinesandandpowdersand）

1：

1.25~1：

1.5

Commonclay

Hard

1：

0.75~1：

1.00

Hard,plasticity

1：

1.00~1：

1.25

Soft

1：

1.50orevensoft

Gravel

Fillingrigid,hardplasticclay

1：

0.50~1：

1.00

Fillingsandysoil

1：

1.00~1：

1.50

Notes:

1.Inaccordancewithdesignrequirementwhenthereisany.

2.Ifapplywater-decreaseorotherreinforcesmeasurement,thelimitofthistablecouldbenotapplied,butcalculatedtocheckmustbedone.

3.Theexcavationdepthshouldn’texceed4mforsoftsoiland8mforhardersoil.

（5）Thequalityinspectionstandardofearthworkexcavationshouldbeinaccordancewithrequirementoffollowingtable2:

Table2Thequalityinspectionstandardofearthworkexcavation（mm）

Sort

No.

Item

Permittedtolerance

Testingmethod

ColumnFoundation

Foundationpit

Foundationgroove

Trimandoftheexcavationsite

Pipe

Trench

Foundation

Ofground

Manual

Mechanical

Maincontrolitems

1

Elevation

－50

±30

±50

－50

－50

Spiritlevel

2

Length,width（measurefromcentertosides）

＋200

－50

＋300

－100

＋500

－150

＋100

——

Transitinstrument,measuredbysteelrule

3

Sideslope

Refertotable1

Checkedbygraderuler

Commoncontrolitems

1

Levelofsurface

20

20

20

20

20

Checkedbyleaningrulerof2mandwedge-shapedfillingruler

2

Soilchar-

acteristicsofFound-

ation

Byobserveoranalyzeonsoilsample

Note:

Thedeviationsofground（road）FoundationonlyapplicabletoFoundationsthatmakeground（road）surfaceonexcavateandfilldirectly.

1.2.3Backfilloftheearthwork

（1）Clearawaygarbage,rootandothersundriesatbottom,takeoutseepageandsilt,andcheckandacceptbottombeforebackfilling..Backfillonploughedsoilorsoftsoilshouldbemadeafterthefoundationhasbeencompacteddensely.

（2）Checkdrainagemeasurement,fillingthicknessofeachlayer,water-containingcontrolandcompactdegreeduringbackfilling,Thefillingthicknessandcompacttimesshouldbedeterminedbysoiltexture,compactcoefficientandappliedequipment.Ifwithoutexperimentalbasis,theninaccordancewithrequirementoffollowingtable3:

Table3Delaminatingthicknessandcompacttimesduringbackfillconstruction

Compactequipment

Delaminatingthickness（mm）

Compacttimesofeachlayer

Flatgrind

250-300

6-8

Vibratingcompactmachine

250-350

3-4

Dieseloilrammingmachine

200-250

3-4

Manualtamping

＜200

3-4

（3）Checkelevation,gradeofsideslope,compactnessandotheritemsafterbackfillingconstructionwithstandardinaccordancewithrequirementofthefollowingtable4:

Table4QualityinspectionstandardofBackfilling（mm）

Sort

No.

Item

Permittedtolerance

Testingmethod

ColumnFoundation

Foundationpit

Foundationgroove

Levelingofexcavationsite

Pipetrench

FDN.Ground（road）Base

Manual

Mechanical

Majorcontrolitems

1

Elevation

－50

±30

±50

－50

－50

Spiritlevel

2

Eachlayercompact–ness

Designrequirement

1

Backfillearthwork

Designrequirement

Sampletestordirectview

Generalitems

2

LayerThicknessandmoisture

Designrequirement

SampletestandSpiritlevel

3

Levelnessofthesurface

20

20

20

20

20

Checkedbyrulerorspiritlevel

1.2.4

1.2.5Fore-controlofPilingWork

1.2.6Checkandacceptofdata:

qualitycertificateofprecast-pilingprovidedbymanufacturer

1.2.7Checkandacceptofarrivedmaterials:

Appearanceanddimensioncheckingofpilesarrivedatconstructionsite.

1.2.8Preparationofpilingwork:

（1）MeasurementofcontrolnetworkandFoundationpointoflevel:

（thepermissibledeviationofpilingpositionis:

20mmforgrouppiling,10mmforsingle-linedpiling.

（2）Ifbuildingsexistnearby,anti-shocktrench（withwidthof0.5-0.8mm）andothershock-isolatingmeasurementshouldbeappliedtodecreasetheinfluencetothem.

（3）Determinepilingsequence:

generallyproceedfromcentertobothsymmetricsidesorinonedirection,fromcentertothearound,fromdeeptoshallow,frombigtosmallandfromlongtoshort.

（4）Checkpillingmechanism:

（a）Settingmeasuringscaleatsidesorframeofthepiling;

（b）Settingspringpadbetweenhammerandpilingcap,pilingcapandpiling,suchashardwood,sack,mat,etc.

（5）Forpilesoflargelengthorsubjecttomorethan500timesofhammering,hammeringcannotbedoneuntilcheckedthepilebodystrengthisqualifiedandafter28daysagingtime.

1.3Middlecontrolofpilingwork:

1.3.1Liftingcontrolofpre-madepiling:

theconcretepre-madepilingshouldonlybeliftedtillthestrengthofwhichislargerthan70%designvalue,andbetransportedtillthestrengthofwhichisupto100%designvalue.

1.3.2Processcontrolofpiling:

（1）Heavyhammerandlowbeating;

（2）Theclearancebetweenpilingcapanditscircumstanceshouldbe5~10mm;

（3）Pilinghammer,pilingcapandpilingbodyshallbeonthesamecenterline;

（4）Thedeviationofverticalityatpilinginsertingshouldnotexceed0.5%;

（5）Whenpilingtipisintohardclayorsandysoil,focusoncontrollingtheinsertingotherthanthedesignedpiletopelevation.Whenpilingtipentersintosoftsoil,focusoncontrollingpiletopelevationotherthaninsertingdepth.However,theimplementationshallfollowtherequirementsofdesigndrawings.

（6）Whenreachingtheinsertingdepthbutnotthedesignedtopelevation,hammer3groupsmorewith10strokesineachgroupandinsertingdepthofeachgroupshallnotexceedthedesigneddatatoverify.Thecontrolledinsertingdepthshallbedefinedwithrelatedorganizationswhennecessary.

（7）Suspendpilingincaseofthefollowingconditions,whilereporttosupervisorintime:

（a）Sharpchangeofinserting;

（b）Suddeninclining/shiftingorseriousreboundingofpile.

（c）Severecrackorcrashoccurredatpiletoporpilebody.

1.3.3Controlofpileconnection:

（1）Theweldingmaterialshallmeetthefollowingregulationsincaseofweldingconnectionandsteelsheetshallbeoflowcarbonsteel.

（2）Whenapplyweldingconnection,fixfouranglesfirstlywithspotwelding,thenweldsymmetrically,whileensurequalityandsizeofwelding.

（3）RefertoTable5forqualityofweldingofpileconnection.

Table5:

No.

Items

AllowableTolerance

Testingmethod

Unit

Value

1

Weldingseamofelectro-weldedpilingconnection:

Upanddownendscrossing

Innerdiameter<700

（2）Undercutdepth

（3）Reinforcementlayerthickness

（4）Reinforcementlayerwidth

mm

mm

mm

mm

≤2

≤0.5

2

2

Measuredbysteelrule

Weldingjointtester

Weldingjointtester

Weldingjointtester

2

Theceasedtimeafterelectro-welding

min

   ＞1

Measuredbystopwatch

1.4CheckandacceptofConstructionQualityforPiling（refertotable7）

1.4.1Thequalitycheckofpre-madepilinginclude:

piling-making,infiltratedepth,standardofhammerstopping,pilingpositionandverticality;

1.4.2Asforgrade1buildingfoundationsorpilefoundationsofpoorgeologicalconditionsorunreliablepilingquality,carryoutpilingqualitytest.

1.4.3Checkingmethodcouldbedynamictestingmethod,ortakingdrillrockcor