中英文泥浆护壁钻孔灌注桩试桩试验方案

BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第12页HBEDFebruary,2017BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第1页HBEDFebruary,2017DocNO.F07671C-G1001-YT-00孟加拉S.ALAM2×660MW燃煤电厂原体试验工作大纲TheOutlineofPrototypeTestforBangladeshS.ALAM2×660MWCoal-firedPowerPlant2017年01月河北石家庄January,2017ShijiazhuangHebei 批准：Approvedby:LiuZhenyan审核：Reviewedby:ZhaoDecheng校核：Checkedby:WangZhongrong编写：Preparedby:GuoHaifengBangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第3页HBEDFebruary,2017目录1 试桩目的及要求ThePurposeandRequirementofTestPile 62拟建场地工程地质条件TheGeologicalConditionsofProposedField 72.1地形地貌Landform 72.2 地层岩性TheStratumLithology 73地基处理方案的确定DeterminationofGroundTreatmentScheme 83.1桩型的选择SelectionofPileType 83.2桩基持力层的选择SelectionoftheLoad-bearingStratumforPileFoundation 83.3试验面的选择SelectionofTestGround 103.4试桩场地的选择SelectionofTestPileField 103.5桩参数的确定DeterminationofPileParameter 114试验方案及实施TestSchemeandImplementation 154.1试桩场地勘探ExplorationandSurveyofTestPileField 154.2临建施工TemporaryBuildingandStructure 164.3施工及要求ConstructionanditsRequirement 174.4试验桩桩头加固StrengtheningofTestPileHead 305原体试验检测PrototypeTestDetection 315.1试验前准备PreparationBeforetheTest 315.2原体试验设备PrototypeTestEquipment 315.3原体试验方案与实施SchemeandImplementationforthePrototypeTest 325.4原体试验工作量WorkQuantitiesofPrototypeTest 506提交试验成品SubmissionofTestReport 52BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第4页HBEDFebruary,2017前言Preface拟建燃煤电厂位于孟加拉湾东岸，吉大港南约50km。距离孟加拉Chittagong-Cox’sBazar高速公路5.5km，陆路至达卡约300km。地理经纬度坐标：纬度21°37’54.19”，经度:91°53’27.54”。当地运输条件不良，小件物资可以通过陆路运输，大部分物资需通过临时码头运至现场。Theproposedcoal-firedpowerplantislocatedontheeastcoastoftheBayofBengal,about50kmsouthofChittagong.Itis5.5kmfromtheChittagong-Cox'sBazarhighwayinBangladeshand300kmfromthelandtoDhaka.Geographiclatitudeandlongitudecoordinates:latitude21°37'54.19",longitude:91°53'27.54".Localtransportconditionsarepoor,smallpiecesofgoodscanbetransportedbyland,mostofthegoodsneedtobetransportedtothesitethroughthetemporarypier.根据已有勘察资料以及火力发电厂各建构筑物的具体情况，对本工程的地基方案进行了经济、技术上的全面比较，同时调研孟加拉当地地基处理施工能力、施工方法及设备情况，综合考虑推荐厂区地基处理采用钢筋混凝土灌注桩桩基。Itisrecommendedtoadoptreinforcedconcretecast-in-placepilefoundationinplantareagroundtreatmentthroughthecompleteeconomicandtechnicalcomparisonofgroundschemesonthebasisofavailableinvestigationdataandspecificsituationofvariousbuildings/structuresoffossilfuelpowerplant,andtheresearchoflocalgroundtreatmentconstructioncapability,constructionmethodsandequipmentconditionsinBangladesh.主要建筑物采用Ф1000mm灌注桩，桩端进入持力层不小于2d，混凝土强度等级为fc'=5000psi混凝土。MainbuildingsuseФ1000mmcast-in-placepile.Theendofpileentersbearingstratumindepthofnotlessthan2d.Theconcretestrengthgradeisfc'=5000psi.附属建筑物采用Ф750mm灌注桩，桩端进入持力层不小于2d，混凝土强度等级为fc'=5000psi混凝土。SubsidiarybuildingsuseФ750mmcast-in-placepile.Theendofpileentersbearingstratumindepthofnotlessthan2d,Theconcretestrengthengradeisfc'=5000psi.为能向实际工程提供工程合理的地基承载力，同时也为工程检测以及施工监理提供必要的依据，进行本次原体试验工作。为使该试验工作得以顺利进行，特编制原体试验工作大纲。大纲的编制依据主要为：Thisprototypetestisconductedtoprovidereasonablegroundbearingcapacityforactualprojectandnecessarybasisforprojecttestingandconstructionsupervision.Inordertomakethetestworkbecarriedoutsmoothly,theprototypetestworkoutlineisedited.Thepreparationbasesaremainlyasfollows:①《孟加拉S.ALAM2×660MW燃煤电厂工程灌注桩试桩任务书》②《孟加拉S.ALAM2×660MW燃煤电厂工程灌注桩试桩指导书》③《孟加拉S.ALAM2×660MW燃煤电厂工程灌注桩试桩说明书》④《孟加拉S.ALAM2×660MW燃煤电厂工程初步设计岩土工程勘测报告》相关规程规范：⑤IBC2012国际建筑标准⑥美国材料与试验协会D1143-2007深基础竖向静载标准试验方法⑦美国材料与试验协会D3966-2007深基础水平静载标准试验方法⑧美国材料与试验协会D4945-2007深基础高应变动力测试标准试验方法⑨美国材料与试验协会D5882-2007深基础低应变完整性标准试验方法⑩美国材料与试验协会D6760-2007深基础混凝土超声波完整性标准试验方法⑪ASCE20-96桩基础设计和施工标准指南TheAssignmentofTrialPilingofCast-in-placePileforBangladeshS.ALAM2×660MWCoal-firedPowerPlantTheGuideBookofTrialPilingofCast-in-placePileforBangladeshS.ALAM2×660MWCoal-firedPowerPlantTheManualofTrialPilingofCast-in-placePileforBangladeshS.ALAM2×660MWCoal-firedPowerPlantBasicDesignGeotechnicalEngineeringSurveyReportforBangladeshS.ALAM2×660MWCoal-firedPowerPlantRelevantRegulationsandCodes:InternationalBuildingCode2012AmericanSocietyforTestingandMaterialsD1143-2007StandardTestMethodsforDeepFoundationsunderStaticAxialCompressiveLoadAmericanSocietyforTestingandMaterialsD3966-2007StandardTestMethodsforDeepFoundationsunderLateralLoadAmericanSocietyforTestingandMaterialsD4945-2007StandardTestMethodsforHigh-StrainDynamicTestingofDeepFoundationsAmericanSocietyforTestingandMaterialsD5882-2007StandardTestMethodsforLow-StrainIntegrityTestingofPilesAmericanSocietyforTestingandMaterialsD6760-2007StandardTestMethodsforIntegrityTestingofConcreteDeepFoundationsbyUltrasonicCrossholeTestingStandardGuidelinesfortheDesignandInstallationofPileFoundations试桩目的及要求ThePurposeandRequirementofTestPile通过试桩为工程桩设计提供设计参数和依据；为工程桩施工提供施工工艺和施工参数；同时为工程桩检测推荐检测方法和提供对比性资料。（1）判定工程地基处理方案的场地代表性；（2）选择合适的成桩设备，确定施工工艺和施工参数；（3）确定单桩竖向抗压承载力、单桩水平承载力；（4）采用低应变动力测试，了解成桩的桩身质量；（5）采用高应变动力测试，了解桩身质量情况，以评定桩端持力层及成桩质量、单桩竖向承载力。同时进行动、静试验成果对比，确定静载荷试验与动测曲线的相对关系，为将来工程桩设计和检测提供对比和依据性资料。（6）通过桩身内力试验，确定桩侧各层土的分层抗压摩阻力和桩端阻力及分布情况。Thetestpilewillprovidedeignparameterandbasisforpiledesign,provideconstructionprocessandparameterforpileconstruction,andwillrecommendtestingmethodandprovidecomparativedataforpiletesting.（1）Determinefieldrepresentativenessofgroundtreatmentscheme;（2）Selectsuitableformingpileequipmentandconfirmconstructionprocessandparameter.（3）Confirmtheverticalcompressiveloadcapacityofsinglepile,andthehorizontalloadcapacityofsinglepile;（4）Applylowstraindynamictestandacquaintwithpilebodyquality;（5）Applyhighstraindynamictestandacquaintwithpilebodyqualitysoastoevaluatethebearingstratumattheendofpile,formingpilequality,andtheverticalloadcapacityofsinglepile.Meanwhile,comparedynamicandstatictestresults,anddeterminerelativerelationshipbetweenstaticloadtestanddynamictestcurves,soastoprovidecomparativedataandbasisforpiledesignandtestinginthefuture.（6）Confirmthestratificationcompressivefrictionalresistanceofeachlayersoilatpileside,theresistanceattheendofpileanditsdistributionconditionsthroughinternalforcetestofpilebody.2拟建场地工程地质条件TheGeologicalConditionsofProposedField2.1地形地貌Landform厂址现状为沿海水稻田，部分地段属于滩涂区，地面标高在绝对标高0m左右。场地地面高程介于1.8~2.50m，场地大部分地段地表裸露，局部有植被覆盖。Sitestatusforthecoastalricefields,partofthesiteisabeacharea,groundelevationintheabsoluteelevationof0morso.Thegroundelevationofthesiteisbetween1.8and2.50m,andthesurfaceofmostofthesiteisbareandthevegetationcoverageislocal.地层岩性TTheSStrattumLLithoologyy根据初勘报告告，厂址区区60.000m深度度范围内的的地层自上上而下主要要包括：①软/中软粉质质粘土；②坚硬的粉粉质粘土层层；③松散中密密，粉砂；；④坚硬的粉粉质粘土层层.；⑤非常密实实粉砂层，持持续到所有有的钻孔孔孔底。①层：软/中中软粉质粘粘土，褐灰灰色夹杂粘粘土质粉砂砂和淤泥质质土，含有有少量云母母及腐烂的的木材和有有机物。该该层主要为为厂区表层层，分布较较广，设计计厚度一般般8.0～15.0mm。②层：深灰色色~灰色，坚坚硬的粉质质黏土与细细砂混合层层，砂质不不均，该层层分布不连连续，场地地部分钻孔孔内有揭露露。本层厚厚度0.550～3.50mm，个别钻钻孔厚度大大于10mm。③层：钢灰色色~灰色，坚坚硬的粉质质粘土、粘粘土质粉砂砂和砂的混混合层，该该层分布不不连续，场场地部分钻钻孔内有揭揭露。本层层厚度2..50～5.00mm。④层：松散~~中等密实实，粉砂层层，夹杂部部分云母碎碎片。本层层厚度3..0～5.0m。⑤层：浅灰色色~棕灰色，密密实~非常密实实的粉细砂砂层，含云云母该层分分布较广，持持续到所有有的钻孔孔孔底。Accorddingtottheppreliiminaaryiinvesstigaationnrepport,,theestrratainttheddepthhranngeoof600.00mminthesiteeareeamaainlyyinccludee:①sofft/mediiumssoftsilttclaay;②harrdsiiltcclaylayeer;③looosemmediuumdeensittyanndsiilt;④harrdsiiltCClaylayeer;⑤verrydeensesilttlayyer,conttinuiingttothheboottommofalldrilllinggholles.①layeer:ssoft/sooftssiltclayy,brrowngrayymixxedcclayeeysiiltaandssiltsoill,coontaiininggassmalllamoountofmmicaandrotttingwooddanddorgganiccmattter..Theelayyeriismaainlyyforrtheeplaantssurfaace,thedisttribuutionnisbroaader,,theedessignofttheggenerraltthickknesssof8.0~155.0m..②layeer:bblackkgraaytoograay,hhardsilttclaayanndfiinessandmixeedlaayer,,uneevensandd,thhelaayerdisttribuutionnisnotconttinuoous,thesiteehassexpposeddsommedrrilliing.Thisslayyertthickknesssis00.50~3..50m,,inddividdualdrilllinggthiickneessggreattertthan10m.③layeer:ggray--grayysteeel,harddsilltcllay,clayyeyssiltandsanddmixxedllayerr,thhediistriibutiionllayerrisnotconttinuoous,thesiteehassexpposeddsommedrrilliing.Thethiccknesssoffthiislaayeris22.50~5..00m..④layeer:lloosee~mmediuumdeense,,silltlaayer,,mixxedwwithsomeemiccafrragmeents..Thiislaayerthiccknesssoff3.00~55.0m..⑤layeer:llighttgraay~browwngrray,densse~veryydennseffinesanddlayyer,conttainiingmmicaThedisttribuutionnofthelayeerissbrooaderr,coontinnuinggtothebotttomoofallldrrilliinghholess.3地基处处理方案的的确定DDeterrminaationnofGrounndTreattmenttScheeme3.1桩桩型的选择择SeleectioonoffPileType根据厂区内的的土层分布布及各层土土的物理力力学性质，结结合建（构构）筑物对对地基承载载力和变形形的要求和和以往工程程地基处理理实践经验验，从经济济、技术、当当地施工能能力等进行行全面比较较，结合场场地水、土土腐蚀性情情况，确定定人工地基基处理采用用桩基础，桩桩型为泥浆浆护壁钻孔孔灌注桩。Anoveeralllcommpariisonismmadeinttermssofeconnomy,,tecchniqque,andlocaalcoonstrructiionccapabbilittiesbaseedonntheereqquireementtofgrouundbbeariingccapaccityanddefoormattionofbbuildding(strructuure)andprevvioussexpperieencessingrouundttreattmenttincombbinattionwithhtheedisstribbutioonoffsittesooilsstrattumaandpphysiicalandmechhaniccalppropeertieesoffeacchsttratuum.IItissdettermiinedtoaadopttpillefooundaationnforrnatturallgrooundtreaatmenntanndseelecttcasst-inn-plaacebboreddpilleprrotecctedbysslurrrywaallaasthhepiilettype3.2桩桩基持力层层的选择SeleectioonofftheeLoaad-beearinngSttratuumfoorPileFounddatioon根据当地类似似工程灌注注桩调研收收资，孟加加拉当地工工程普遍应应用钢筋混混凝土灌注注桩，其施工方方法较为成成熟。在孟孟加拉国内内的钻孔桩桩的桩径主主要有φ600mmm、φ750mmm、φ10000mm等尺寸，通过对不不同桩径灌灌注桩极限限承载力计计算比较，并并根据现场场施工机械械设备、施施工速度、施工成本等方面综合考虑，推荐主厂房、烟囱、锅炉等区域采用φ1000mm钻孔灌注桩，灌注桩桩端进入第⑤层密实砂层2d。根据初勘报告及相关工程经验，有效桩长52.0m，单桩极限抗压承载力极限值约为6850kN，满足主厂房区域建筑物基础对强度和变形的要求，在技术上是可行的。综合比较，并结合本工程当地施工条件及施工进度要求等各因素，推荐主厂房区域主要建筑物地基处理采用φ1000mm钢筋混凝土灌注桩，以⑤层密实砂层为持力层，有效桩长52.0m。Accorddingtotthellocallsimmilarrproojecttspoourinngpiilerreseaarchfundding,,loccaleenginneeriingiinBaanglaadeshhwiddesprreadappllicattionofrreinfforceedcooncreeteppile,,theeconnstruuctioonmeethoddismoreematture..TheepillediiametteroofbooredpileesinnBanngladdeshismmainllyφ600mmm,φ750mmm,φ10000mmaandssoonn.Thhrougghthhecaalcullatioonanndcoomparrisonnoftheultiimateebeaaringgcappacittyoffdifffereentppilediammeterrs,CComprrehennsiveeconnsideeratiion,recoommenndthhemaainpplantt,chhimneeys,boillersandotheerarreasusinngφ10000mmbboreddpilles,pileeinttothhefiirst⑤layyerddenseelayyeroofsaand22d.AAccorrdinggtotheprelliminnarysurvveyrreporrtanndreelevaanteenginneeriingeexperriencce,ttheeeffecctiveepilleleengthhis520meterrs,ttheuultimmatebearringcapaacityyofsinggleppileisaaboutt68550kN..Itisttechnnicalllyffeasiibletommeettherequuiremmentssofstreengthhandddefformaationnofthebuilldinggfouundattionintthemmainbuilldinggareea.CComprrehennsiveecommpariison,,commbineedwiithtthellocallconnstruuctiooncoondittionssanddconnstruuctioonsccheduulerrequiiremeentsoftthepprojeectaandootherrfacctorss,reecommmendeedthhemaainbbuilddingareaaofthemainnbuiildinngfooundaationntreeatmeentuusinggφ10000mmrreinfforceedcooncreeteppilessto⑤layyerddenseesanndlaayerfortheholddinglayeer,ttheeeffecctiveepilleleengthh52.0m.由于辅助、附附属建（构构）筑物体体量及荷载载均较小，采采用φ750mmm混凝土灌灌注桩短桩桩，以中间间坚硬的砂砂层为持力力层，桩长长15..0~200.0m，预估单桩竖向极限承承载力约26000kNN。根据钻钻孔揭露情情况，无坚坚硬的夹层层的建筑物物下，桩基基采用摩擦擦型灌注桩桩，桩端进进入②层密实粉粉质黏土层层，通过增增加桩长提提高桩基承承载力，满满足附属建建筑物承载载力和变形形要求。根根据当地灌灌注桩调研研资料，φ750mmm的钢筋混混凝土灌注注桩在当地地实际工程程中应用普普遍，施工工方法较为为成熟。因因此，附属属、辅助建建（构）筑筑物地基处处理采用φ750mmm灌注桩短短桩方案是是可行的。Becausseofftheeauxxiliaaryaandaauxilliaryystrructuures,,theeloaadanndlooadaaressmalll.Thhecooncreeteppilewithhφ750mmmissuseedasstheeshoortppile,,witththhemiiddleeharrdsaandllayerrasthebearringlayeer,ttheppilelenggthiis155.0~~20..0m,theultiimateebeaaringgcappacittyofftheesinnglepileeisabouut26600kkN.AAccorrdinggtothediscclosuureoofdrrilliingccondiitionns,nnoriigidsanddwichhbuiildinngs,thefricctionnpillefooundaationn,thhepiileiintothe②layyeroofdeensesilttycllayllayerr,byyinccreassingthepileelenngthtoiimprooveppilebearringcapaacityy,toomeeetthhebeearinngcaapaciityoofbuuildiingsAnddefoormattionrequuiremmentss.Acccorddingtottheiinvesstigaationndattaoffloccalccast--in-ssitupilee,φ750mmmreeinfoorceddconncrettecaast-iin-pllacepileeiswideelyuusedinllocallenggineeeringg,anndthhecoonstrructiionmmethoodissmorremaaturee.Thhereffore,,itisffeasiibletouuseφ750mmmcaast-iin-pllacepileestoosollvettheffounddatioontrreatmmentofaauxilliaryyanddauxxiliaarybbuilddingss.3.3试验面的的选择SellectiionoofTeestGGrounnd本工程±0..00m标高相当当于绝对标标高5.000m。综合考虑施工的的便利性、气气候因素（下下雨）、场场地潮湿、试试验的可行行性和试验验的安全性性等因素，灌灌注桩成桩桩及试验工工作宜在回填后后的地面进进行。由于试桩桩工期较长长，故场地地回填范围围和高度应充充分考虑气气候因素（下下雨）、施施工范围、施施工材料和和机械作业业范围和整整个试桩过程中中的便利性性，回填后地地面标高应应不低于后后期施工过过程中降水水后现场的积水高度度，且不低低于绝对标标高4.0米。The±0.000mellevattionoftthisprojjectiseequivvalennttootheeabssolutteellevattionof55.00mm.Coonsidderinngthhecoonvenniencceoffconnstruuctioon,tthecclimaaticfacttors(raiin),thehumiidityyofthesitee,thhefeeasibbilittyofftheetesstanndthhesaafetyyofthetestt,thhepiile-fformiingaandttestworkkofthecastt-in--placcepiilesshoulldbeecarrrieddouttonthegrouundaafterrbacckfilllingg.Asstheetesstpeerioddislongg,sootheesittebaackfiillsscopeeanddheiightshouuldttakefulllacccounttofclimmaticcfacctorss(raain),,theescoopeoofcoonstrructiion,consstrucctionnmatteriaalsaandmmechaanicaalopperattionssanddtheeenttiretesttpilleinntheeproocesssofconvvenieence..Bacckfilllaffterthegrouundeelevaationnshoouldnotbellowerrthaanthhepoost-cconsttructtionproccessafteerthheprrecippitattionofwwaterrheiight,,anddnottlesssthhan44.0mmeterrs.3.4试试桩场地的的选择SSelecctionnofTestPileFielld试验场地选择择在地质条条件具有代代表性的地地段，综合合试验桩的的桩长及桩桩端持力层层等因素、勘测资料料及主要建建构筑物区区域地层及及总平面布布置的情况况，由设计计、勘测等等共同确定定试桩场地地位置，试桩场地地位置如图3.4--1所示。TestssiteseleectioonInntheegeoologiicalcondditioonsoofthhereepressentaativeeofthesitee,coompreehenssivetesttpilleleengthhanddpilleenndbeearinnglaayerandotheerfaactorrs,ssurveeydaataaandtthemmainconsstrucctionnareeaofftheeforrmatiionaandttheooveraallllayouutofftheesittuatiion,frommtheedessign,,surrveyandotheercoommonntodeteerminnethheteestFFigurre3..4-1showwsthhepoositiionoofthhepiilessiteandtheposiitionnofthetesttpillesiite.灌注桩试桩打打桩区域为为17.0×255.5m范围，打打桩区域4角坐标分分别为X=243306322.7322、Y=3855388..573；；X=243306344.5099、Y=3855405..480；；X=243306099.1499、Y=3855408..145；；X=243306077.3722、Y=3855391..238。Theteestppileandpileedriivinggareeafoorcaast-iin-pllacepileescooverssanareaaof17.0×25.5m;foour-ccorneercooordiinatiionoofthhepiileddriviingaareaaredesiigneddasX=243306322.7322、Y=3855388..573；；X=243306344.5099、Y=3855405..480；；X=243306099.1499、Y=3855408..145；；X=243306077.3722、Y=3855391..238resppectiivelyy.3.5桩桩参数的确确定DeteerminnatioonoffPillePaarameeter主要建筑物采采用Ф10000mm灌注注桩，桩长长约52米，桩端进进入持力层层(密实砂层层)不小于2d，预估估单桩竖向极限抗抗压承载力力极限值约约为68550kN，预预估水平极极限承载力力为200kkN。附属建筑筑物采用Ф750mmm灌注桩桩桩，桩长约为22m，桩端进入入持力层（密实粉质质黏土层）不不小于2d，预估估单桩竖向抗压极限承承载力约26000kNN，预估水水平极限承承载力为130kkN。最终桩长和参数数根据桩前勘探资资料最终确确定，混凝凝土强度等等级为fc'=50000psii混凝土。ThemaainbbuilddingssareeФ10000mmccast--in-pplaceepilles,thepileelenngthisaaboutt52metters,,theepilleenndenntersstheebeaaringglayyer((denssesaandllayerr)issnottlesssthhan22d,tthellimittvallueoofthheulltimaateaaxiallloaddisestiimateedtoobe68500kN,Theultiimateelateeralloaddseestimmateddtobeabouut2000kN.ThhebeearinngsttructtureofФ750mmmcaast-iin-pllacepileeisabouut222manndthhepiileeendiisinntheebeaaringgstrratumm(deensesilttycllayllayerr)offnottlesssthhan22d.TTheuultimmateaxiaalloaddofsinggleppileiseestimmateddtobeaaboutt26000kN,,Theeulttimattelateeralloaddseestimmateddtobeabouut1330kN..Theeconncrettepiilellengtthanndpaarameetersswerredeetermmineddacccordiingttothheprre-piileeexplooratiionddata,,anddtheeconncrettesttrenggthggradeewassfc''=50000ppsicconcrrete..锚桩采用Ф11000mmm灌注桩桩，桩端进进入持力层层不小于22d，混凝土强强度等级为为fc'=50000psi混凝土，锚锚桩的锚筋筋高出桩顶顶1.5mm（在进行行静载荷试试验时，需需将锚桩的的锚筋进行行重新焊接接，锚筋加加长到4..5m，以以便锚桩与与试验大梁梁连接）。试试验桩桩间间距为8.5m，一字排排列。锚桩桩（反力桩桩）桩间距距8.5m，分踞在在试验桩两两侧，具体体装参数见见桩位布置置图（插图图3.5--1）。预估试试验灌注桩桩SZ1--SZ3桩长约为52米,SZ4-SZ6桩长约为22米；M1-MM8锚桩桩长长为52米，M9-MM12锚桩桩长长为22米。最终桩长及参数需在试试桩勘探完完成后确定定。TheannchorrpilleaddoptssФ10000mmccast--in-pplaceepille,Theeendoofpiileeenterrsbeearinngsttratuuminndeppthoofnootleesstthantwotiessofdiammeterrs,Thecconcrretestreengthhenggradeeisfc'=50000psii.Theanchhorbboltofaanchoorpiilesshalllbe1.5mmhiggherthanntheetoppofpilee.(ddurinngsttatissticloaddtesst,ttheaanchoorbaaroffancchorpileeshaallbberee-welldedandexteendeddto4.5mmtoeasiilycconneectaanchoorpiileaandttestgirdderbbeam)).Sppacinggofpileesinnoneelinnefoorteestaadoptts8..5m.Thhesppacinngoffancchorpilee(reeactiionppile))thaatdiistriibuteedattbotthsiidesofppilessforrtesstshhallbe88.5m.Foordeetaillparrametter,refeertootheearrrangeementtforrtheepossitioonoffpilles((Figuure3..5-1)).PrredicctionntesstoffpilleSZZ1-SZZ3piilellengtthissaboout552.0mm,abboutSZ4--SZ6pileelenggthiisabbout20.00m;soM1-MM8piileiis52.0mllong,,M9--M12pileeis22.0mllong..Ulttimattelydeteerminnethhepiilellengtthpiilettesttobbecaarrieedouutafftertheexpllorattion..本次试桩综合合考虑安全全、工期和和经济等因因素，建议议采用锚桩桩试桩方案案。若采用用配重方案案进行试桩桩，为了便便于施工，相相邻桩间距距为10m,且需满足ASTMMD11143-22007第6.11、6.2..1、6.3..1、6.4..1、6.4..2、6.4..3条规定。建建议配重所所能提供压压力不小于于预估极限承承载力的1.2倍。Theteestppilecomppreheensivvecoonsidderattionofssafetty,ddurattionandeconnomiccfacctorss,weereccommeendttheuuseoofannchorrpilleteestppileproggram..Iftheuseofccountterweeighttproogrammforrtesstinggpille,iinorrdertoffacillitattethhecoonstrructiionoofaddjaceentppilespaccingof110m.Andshalllmeeettthepproviisionnsoff6.111,6..2.1,,6.33.1,6.4..1,66.4.22andd6.44.3oofASSTMDD11433-20007.IItisssugggesttedtthattheweigghtccanpproviidettheppresssurenotlesssthaan1..2tiimesofttheeestimmateddulttimattebeearinngcaapaciity.BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第14页HBEDFebruary,2017图3.4-11：灌注桩桩试桩场地地布置图Figgure3.4--1LaayouttofTesttPilleFiieldforCastt-in--placcePiile插图3.5--1：桩位布布置图及制制桩图FFigurre3.55-1：PillelaayouttanddpillingdrawwingBangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第18页HBEDFebruary,20174试验方方案及实施施TesttSchhemeandImpllemenntatiion4.1试试桩场地勘勘探ExpllorattionandSurveeyoffTesstPileFieldd为确定试桩场场地工程地地质条件是是否具有代代表性及试试验结果的的对比分析析，在成桩桩前需对场场地进行地地质勘测，拟拟在灌注桩桩试桩场布布置勘探孔孔4个，其中2个取样孔孔、2个标贯孔孔，孔深初初步定为557米。勘探探孔布置见见下插图4.1--1，桩前勘勘探工作量量见表4.1--1.GGeoloogicaalexxplorratioonanndsuurveyyshaallbbecaarrieedouutbeeforeeforrminggpillesssoasstodeteerminneifftheegeoologiicalcondditioonofftesstpiileffielddisreprresenntatiiveaandttocoomparreanndannalyzzethheteestrresullt.IItissprooposeedtooarrrangeefouurexxplorratorryhoolesintthettestpileefieeld,ofwwhichhtwooareesammplinnghoolesandtheotheersaaresstanddardpeneetrattionholees,ppreliiminaarilyywithhdeppthoof57m.TThellayouutofexxplorratorryhoolesandtheworkkquaantittyoffexpploraationnbefforepiliingaaresshownninFiguure44.1-11anddTabble44.1-11resspecttivelly.插图4.1--1试桩勘探孔孔布置图Figuree4.11-1LLayouutoffexpploraatoryyhollesiinteestppilesitee桩前勘探工作作量一览表表表4.1--1勘探点编号钻孔类型地段孔口标高（m）钻孔深度（m）土样个数标准贯入试验(次)原状扰动SK1标贯孔灌注桩试桩场场区域4.05738SK2取样孔4.05738SK3取样孔4.05738SK4标贯孔4.05738ThewoorkqquanttityofeexplooratiionbbeforrepiilinggTaable4.1--1SNofexpllorattionpoinntsTypesofddrilllingholeesDistriictTheellevattionofhhole--openning（m）Thedeepthofddrilllingholee（m）ThenuumberrofsoillsammpleStandaardppenettratiionttest(time))OriginnalsstateedisturrbancceSK1StandaardppenettratiionhholeTestppilefielldfoorcaast-iin-pllacepilee4.05738SK2Sampliinghhole4.05738SK3Sampliinghhole4.05738SK4Standaardppenettratiionhhole4.057384.2临临建施工TTempooraryyBuilddingandStruccturee施工场地和道道路平整、硬硬化工作必必须需满足足施工要求求，不影响响施工进度度。Underthepremmiseofeensurringconsstrucctionnschhedulleanndmeeetinngthhecoonstrructiionddemannd,tthellevellingandharddeninngoffconnstruuctioonsiiteaandrroadmusttbeonsscheddule..施工用水需保保证正常的的施工用水水。Thecoonstrructiionwwaterrforrnorrmalusaggeshhallbepproviided..施工现场用电电需保证正正常的施工工用电。Thecoonstrructiionppowerrsuppplyshalllmaakessurethenormmaluusagee.制浆系统布置置在拟打桩桩场地附近近，并配置置卧式泥浆浆搅拌机、泥浆泵和泥浆，保证泥浆重复循环利用，减少对环境的污染。Apluppingsysttemcconsiistinngoffhorrizonntalslurrrymmixerrs,sslurrrypuumpaandsslurrryponddisarraangeddneaarbythepileedriivinggareea,soasttoprroduccesllurryyinareepetiitiveeanddcirrculaarmaannerranddalleeviattethheimmpactttotheenviironmmentcaussedbbypoolluttion..4.3施施工及要求求ConnstruuctioonanndittsReequirremennt4.3.1施工及设设备ConnstruuctioonanndEquippmentt灌注桩采用泥泥浆护壁正正循环回转转钻机或泥泥浆护壁旋旋挖钻机成成孔施工工工艺，主要要设备为成成孔钻机、吊吊车、电焊焊机、经纬纬仪、水准准仪等。具具体见施工工机具一览览表表4.3--1（不限限于表中所所列施工机机具）。Thecastt-in--placcepiileaadopttsfoorminngholeeprottecteedbyyslurrrywallinaappliicatiionoofciircullatioonsllewinngdrrilliingmmachiineoorrotarrydrrilliingrrig,mainnlyccompoosedoffformiinghholedrilllinggmacchinee,crrane,,eleectriicweeldinngmaachinne,ttheoddolitte,aandllevellgauuge,etc..witthmooreddetaiilsaasshhowninTTablee4.33-1.灌注桩施工机机具一览表表表4.3--1序号机具名称型号规格单位数量备注1钻机（成孔）台2设备型号与当当地分包商商提供设备备为准2吊车25T辆13电焊机台34钢筋弯曲机台15钢筋切割台16钢筋调直机台17气焊工具套18经纬仪台29水准仪台1Constrructiionmmachiinesandtoollsfoorcaast-iin-pllacepileeworrkTabble44.3-11SNItemTypeaandMModellUnitQuantiityNote1Drilliingmmachiine（holee-forrmingg）Set2Thetyypeaandmmodellareesubbjectttotheonessproovideedbyyloccalccontrractoors2Crane25TNo.13ElectrricwweldeerSet34RebarbenddingmachhineSet15RebarcutttingmachhineSet16RebarstraaightterSet17GasweeldinngtooolSet18TheodooliteeSet29LevelgauggeSet14.3.2记录和取取样ReecorddanddSammplinng记录严格按照照灌注桩成成桩规定的的内容和格格式进行施施工记录，要要求真实、准准确。灌注注桩记录表表见表4.3--2。Duriingcconsttructtion,,theereccordssshaallbbeprroperrlymmainttaineedinnconntenttsanndfoormattspeecifiiedbbythheprrovissionssofformmingpileeofcastt-in--placcefoorminngpiile.Thesampplettableeofcastt-in--placcepiileiisassshoowniinTaable4.3--2.BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第19页HBEDFebruary,2017表4.3--2钻孔灌注注桩施工记记录表工程名称：施工单位位：设计桩径径：mm砼强度等等级：使用部位位：序号日期桩号孔口标高（mm）钻孔时间首次冲孔时间间设计深度（mm）实测深度（mm）吊笼深度（mm）下导管时间二次冲孔时间间泥浆比重沉渣厚度（cm）灌注时间砼塌落度（mmm）砼灌注量（mm3）充盈系数机号开始结束开始结束开始结束开始结束开始结束设计方量实际方量量工程负责：：工长：记录：BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第20页HBEDFebruary,2017Tablle4..3-2ReccordsheeetoffBorredCCast--in-pplaceePilleProjecctnaame：Consst