中英文泥漿護壁鉆孔灌注樁試樁試驗方案

BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第12頁HBEDFebruary,2017BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第1頁HBEDFebruary,2017DocNO.F07671C-G1001-YT-00孟加拉S.ALAM2×660MW燃煤電廠原體試驗工作大綱TheOutlineofPrototypeTestforBangladeshS.ALAM2×660MWCoal-firedPowerPlant2017年01月河北石家莊January,2017ShijiazhuangHebei 批準(zhǔn)：Approvedby:LiuZhenyan審核：Reviewedby:ZhaoDecheng校核：Checkedby:WangZhongrong編寫：Preparedby:GuoHaifengBangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第3頁HBEDFebruary,2017目錄1 試樁目的及要求ThePurposeandRequirementofTestPile 62擬建場地工程地質(zhì)條件TheGeologicalConditionsofProposedField 72.1地形地貌Landform 72.2 地層巖性TheStratumLithology 73地基處理方案的確定DeterminationofGroundTreatmentScheme 83.1樁型的選擇SelectionofPileType 83.2樁基持力層的選擇SelectionoftheLoad-bearingStratumforPileFoundation 83.3試驗面的選擇SelectionofTestGround 103.4試樁場地的選擇SelectionofTestPileField 103.5樁參數(shù)的確定DeterminationofPileParameter 114試驗方案及實施TestSchemeandImplementation 154.1試樁場地勘探ExplorationandSurveyofTestPileField 154.2臨建施工TemporaryBuildingandStructure 164.3施工及要求ConstructionanditsRequirement 174.4試驗樁樁頭加固StrengtheningofTestPileHead 305原體試驗檢測PrototypeTestDetection 315.1試驗前準(zhǔn)備PreparationBeforetheTest 315.2原體試驗設(shè)備PrototypeTestEquipment 315.3原體試驗方案與實施SchemeandImplementationforthePrototypeTest 325.4原體試驗工作量WorkQuantitiesofPrototypeTest 506提交試驗成品SubmissionofTestReport 52BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第4頁HBEDFebruary,2017前言Preface擬建燃煤電廠位于孟加拉灣東岸，吉大港南約50km。距離孟加拉Chittagong-Cox’sBazar高速公路5.5km，陸路至達卡約300km。地理經(jīng)緯度坐標(biāo)：緯度21°37’54.19”，經(jīng)度:91°53’27.54”。當(dāng)?shù)剡\輸條件不良，小件物資可以通過陸路運輸，大部分物資需通過臨時碼頭運至現(xiàn)場。Theproposedcoal-firedpowerplantislocatedontheeastcoastoftheBayofBengal,about50kmsouthofChittagong.Itis5.5kmfromtheChittagong-Cox'sBazarhighwayinBangladeshand300kmfromthelandtoDhaka.Geographiclatitudeandlongitudecoordinates:latitude21°37'54.19",longitude:91°53'27.54".Localtransportconditionsarepoor,smallpiecesofgoodscanbetransportedbyland,mostofthegoodsneedtobetransportedtothesitethroughthetemporarypier.根據(jù)已有勘察資料以及火力發(fā)電廠各建構(gòu)筑物的具體情況，對本工程的地基方案進行了經(jīng)濟、技術(shù)上的全面比較，同時調(diào)研孟加拉當(dāng)?shù)氐鼗幚硎┕つ芰Α⑹┕し椒霸O(shè)備情況，綜合考慮推薦廠區(qū)地基處理采用鋼筋混凝土灌注樁樁基。Itisrecommendedtoadoptreinforcedconcretecast-in-placepilefoundationinplantareagroundtreatmentthroughthecompleteeconomicandtechnicalcomparisonofgroundschemesonthebasisofavailableinvestigationdataandspecificsituationofvariousbuildings/structuresoffossilfuelpowerplant,andtheresearchoflocalgroundtreatmentconstructioncapability,constructionmethodsandequipmentconditionsinBangladesh.主要建筑物采用Ф1000mm灌注樁，樁端進入持力層不小于2d，混凝土強度等級為fc'=5000psi混凝土。MainbuildingsuseФ1000mmcast-in-placepile.Theendofpileentersbearingstratumindepthofnotlessthan2d.Theconcretestrengthgradeisfc'=5000psi.附屬建筑物采用Ф750mm灌注樁，樁端進入持力層不小于2d，混凝土強度等級為fc'=5000psi混凝土。SubsidiarybuildingsuseФ750mmcast-in-placepile.Theendofpileentersbearingstratumindepthofnotlessthan2d,Theconcretestrengthengradeisfc'=5000psi.為能向?qū)嶋H工程提供工程合理的地基承載力，同時也為工程檢測以及施工監(jiān)理提供必要的依據(jù)，進行本次原體試驗工作。為使該試驗工作得以順利進行，特編制原體試驗工作大綱。大綱的編制依據(jù)主要為：Thisprototypetestisconductedtoprovidereasonablegroundbearingcapacityforactualprojectandnecessarybasisforprojecttestingandconstructionsupervision.Inordertomakethetestworkbecarriedoutsmoothly,theprototypetestworkoutlineisedited.Thepreparationbasesaremainlyasfollows:①《孟加拉S.ALAM2×660MW燃煤電廠工程灌注樁試樁任務(wù)書》②《孟加拉S.ALAM2×660MW燃煤電廠工程灌注樁試樁指導(dǎo)書》③《孟加拉S.ALAM2×660MW燃煤電廠工程灌注樁試樁說明書》④《孟加拉S.ALAM2×660MW燃煤電廠工程初步設(shè)計巖土工程勘測報告》相關(guān)規(guī)程規(guī)范：⑤IBC2012國際建筑標(biāo)準(zhǔn)⑥美國材料與試驗協(xié)會D1143-2007深基礎(chǔ)豎向靜載標(biāo)準(zhǔn)試驗方法⑦美國材料與試驗協(xié)會D3966-2007深基礎(chǔ)水平靜載標(biāo)準(zhǔn)試驗方法⑧美國材料與試驗協(xié)會D4945-2007深基礎(chǔ)高應(yīng)變動力測試標(biāo)準(zhǔn)試驗方法⑨美國材料與試驗協(xié)會D5882-2007深基礎(chǔ)低應(yīng)變完整性標(biāo)準(zhǔn)試驗方法⑩美國材料與試驗協(xié)會D6760-2007深基礎(chǔ)混凝土超聲波完整性標(biāo)準(zhǔn)試驗方法?ASCE20-96樁基礎(chǔ)設(shè)計和施工標(biāo)準(zhǔn)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試樁目的及要求ThePurposeandRequirementofTestPile通過試樁為工程樁設(shè)計提供設(shè)計參數(shù)和依據(jù)；為工程樁施工提供施工工藝和施工參數(shù)；同時為工程樁檢測推薦檢測方法和提供對比性資料。（1）判定工程地基處理方案的場地代表性；（2）選擇合適的成樁設(shè)備，確定施工工藝和施工參數(shù)；（3）確定單樁豎向抗壓承載力、單樁水平承載力；（4）采用低應(yīng)變動力測試，了解成樁的樁身質(zhì)量；（5）采用高應(yīng)變動力測試，了解樁身質(zhì)量情況，以評定樁端持力層及成樁質(zhì)量、單樁豎向承載力。同時進行動、靜試驗成果對比，確定靜載荷試驗與動測曲線的相對關(guān)系，為將來工程樁設(shè)計和檢測提供對比和依據(jù)性資料。（6）通過樁身內(nèi)力試驗，確定樁側(cè)各層土的分層抗壓摩阻力和樁端阻力及分布情況。Thetestpilewillprovidedeignparameterandbasisforpiledesign,provideconstructionprocessandparameterforpileconstruction,andwillrecommendtestingmethodandprovidecomparativedataforpiletesting.（1）Determinefieldrepresentativenessofgroundtreatmentscheme;（2）Selectsuitableformingpileequipmentandconfirmconstructionprocessandparameter.（3）Confirmtheverticalcompressiveloadcapacityofsinglepile,andthehorizontalloadcapacityofsinglepile;（4）Applylowstraindynamictestandacquaintwithpilebodyquality;（5）Applyhighstraindynamictestandacquaintwithpilebodyqualitysoastoevaluatethebearingstratumattheendofpile,formingpilequality,andtheverticalloadcapacityofsinglepile.Meanwhile,comparedynamicandstatictestresults,anddeterminerelativerelationshipbetweenstaticloadtestanddynamictestcurves,soastoprovidecomparativedataandbasisforpiledesignandtestinginthefuture.（6）Confirmthestratificationcompressivefrictionalresistanceofeachlayersoilatpileside,theresistanceattheendofpileanditsdistributionconditionsthroughinternalforcetestofpilebody.2擬建場地工程地質(zhì)條件TheGeologicalConditionsofProposedField2.1地形地貌Landform廠址現(xiàn)狀為沿海水稻田，部分地段屬于灘涂區(qū)，地面標(biāo)高在絕對標(biāo)高0m左右。場地地面高程介于1.8~2.50m，場地大部分地段地表裸露，局部有植被覆蓋。Sitestatusforthecoastalricefields,partofthesiteisabeacharea,groundelevationintheabsoluteelevationof0morso.Thegroundelevationofthesiteisbetween1.8and2.50m,andthesurfaceofmostofthesiteisbareandthevegetationcoverageislocal.地層巖性TTheSStrattumLLithoologyy根據(jù)初勘報告告，廠址區(qū)區(qū)60.000m深度度范圍內(nèi)的的地層自上上而下主要要包括：①軟/中軟粉質(zhì)質(zhì)粘土；②堅硬的粉粉質(zhì)粘土層層；③松散中密密，粉砂；；④堅硬的粉粉質(zhì)粘土層層.；⑤非常密實實粉砂層，持持續(xù)到所有有的鉆孔孔孔底。①層：軟/中中軟粉質(zhì)粘粘土，褐灰灰色夾雜粘粘土質(zhì)粉砂砂和淤泥質(zhì)質(zhì)土，含有有少量云母母及腐爛的的木材和有有機物。該該層主要為為廠區(qū)表層層，分布較較廣，設(shè)計計厚度一般般8.0～15.0mm。②層：深灰色色~灰色，堅堅硬的粉質(zhì)質(zhì)黏土與細細砂混合層層，砂質(zhì)不不均，該層層分布不連連續(xù)，場地地部分鉆孔孔內(nèi)有揭露露。本層厚厚度0.550～3.50mm，個別鉆鉆孔厚度大大于10mm。③層：鋼灰色色~灰色，堅堅硬的粉質(zhì)質(zhì)粘土、粘粘土質(zhì)粉砂砂和砂的混混合層，該該層分布不不連續(xù)，場場地部分鉆鉆孔內(nèi)有揭揭露。本層層厚度2..50～5.00mm。④層：松散~~中等密實實，粉砂層層，夾雜部部分云母碎碎片。本層層厚度3..0～5.0m。⑤層：淺灰色色~棕灰色，密密實~非常密實實的粉細砂砂層，含云云母該層分分布較廣，持持續(xù)到所有有的鉆孔孔孔底。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地基處處理方案的的確定DDeterrminaationnofGrounndTreattmenttScheeme3.1樁樁型的選擇擇SeleectioonoffPileType根據(jù)廠區(qū)內(nèi)的的土層分布布及各層土土的物理力力學(xué)性質(zhì)，結(jié)結(jié)合建（構(gòu)構(gòu)）筑物對對地基承載載力和變形形的要求和和以往工程程地基處理理實踐經(jīng)驗驗，從經(jīng)濟濟、技術(shù)、當(dāng)當(dāng)?shù)厥┕つ苣芰Φ冗M行行全面比較較，結(jié)合場場地水、土土腐蝕性情情況，確定定人工地基基處理采用用樁基礎(chǔ)，樁樁型為泥漿漿護壁鉆孔孔灌注樁。Anoveeralllcommpariisonismmadeinttermssofeconnomy,,tecchniqque,andlocaalcoonstrructiionccapabbilittiesbaseedonntheereqquireementtofgrouundbbeariingccapaccityanddefoormattionofbbuildding(strructuure)andprevvioussexpperieencessingrouundttreattmenttincombbinattionwithhtheedisstribbutioonoffsittesooilsstrattumaandpphysiicalandmechhaniccalppropeertieesoffeacchsttratuum.IItissdettermiinedtoaadopttpillefooundaationnforrnatturallgrooundtreaatmenntanndseelecttcasst-inn-plaacebboreddpilleprrotecctedbysslurrrywaallaasthhepiilettype3.2樁樁基持力層層的選擇SeleectioonofftheeLoaad-beearinngSttratuumfoorPileFounddatioon根據(jù)當(dāng)?shù)仡愃扑乒こ坦嘧⒆墩{(diào)研收收資，孟加加拉當(dāng)?shù)毓すこ唐毡閼?yīng)應(yīng)用鋼筋混混凝土灌注注樁，其施工方方法較為成成熟。在孟孟加拉國內(nèi)內(nèi)的鉆孔樁樁的樁徑主主要有φ600mmm、φ750mmm、φ10000mm等尺寸，通過對不不同樁徑灌灌注樁極限限承載力計計算比較，并并根據(jù)現(xiàn)場場施工機械械設(shè)備、施施工速度、施工成本等方面綜合考慮，推薦主廠房、煙囪、鍋爐等區(qū)域采用φ1000mm鉆孔灌注樁，灌注樁樁端進入第⑤層密實砂層2d。根據(jù)初勘報告及相關(guān)工程經(jīng)驗，有效樁長52.0m，單樁極限抗壓承載力極限值約為6850kN，滿足主廠房區(qū)域建筑物基礎(chǔ)對強度和變形的要求，在技術(shù)上是可行的。綜合比較，并結(jié)合本工程當(dāng)?shù)厥┕l件及施工進度要求等各因素，推薦主廠房區(qū)域主要建筑物地基處理采用φ1000mm鋼筋混凝土灌注樁，以⑤層密實砂層為持力層，有效樁長52.0m。Accorddingtotthellocallsimmilarrproojecttspoourinngpiilerreseaarchfundding,,loccaleenginneeriingiinBaanglaadeshhwiddesprreadappllicattionofrreinfforceedcooncreeteppile,,theeconnstruuctioonmeethoddismoreematture..TheepillediiametteroofbooredpileesinnBanngladdeshismmainllyφ600mmm,φ750mmm,φ10000mmaandssoonn.Thhrougghthhecaalcullatioonanndcoomparrisonnoftheultiimateebeaaringgcappacittyoffdifffereentppilediammeterrs,CComprrehennsiveeconnsideeratiion,recoommenndthhemaainpplantt,chhimneeys,boillersandotheerarreasusinngφ10000mmbboreddpilles,pileeinttothhefiirst⑤layyerddenseelayyeroofsaand22d.AAccorrdinggtotheprelliminnarysurvveyrreporrtanndreelevaanteenginneeriingeexperriencce,ttheeeffecctiveepilleleengthhis520meterrs,ttheuultimmatebearringcapaacityyofsinggleppileisaaboutt68550kN..Itisttechnnicalllyffeasiibletommeettherequuiremmentssofstreengthhandddefformaationnofthebuilldinggfouundattionintthemmainbuilldinggareea.CComprrehennsiveecommpariison,,commbineedwiithtthellocallconnstruuctiooncoondittionssanddconnstruuctioonsccheduulerrequiiremeentsoftthepprojeectaandootherrfacctorss,reecommmendeedthhemaainbbuilddingareaaofthemainnbuiildinngfooundaationntreeatmeentuusinggφ10000mmrreinfforceedcooncreeteppilessto⑤layyerddenseesanndlaayerfortheholddinglayeer,ttheeeffecctiveepilleleengthh52.0m.由于輔助、附附屬建（構(gòu)構(gòu)）筑物體體量及荷載載均較小，采采用φ750mmm混凝土灌灌注樁短樁樁，以中間間堅硬的砂砂層為持力力層，樁長長15..0~200.0m，預(yù)估單樁豎向極限承承載力約26000kNN。根據(jù)鉆鉆孔揭露情情況，無堅堅硬的夾層層的建筑物物下，樁基基采用摩擦擦型灌注樁樁，樁端進進入②層密實粉粉質(zhì)黏土層層，通過增增加樁長提提高樁基承承載力，滿滿足附屬建建筑物承載載力和變形形要求。根根據(jù)當(dāng)?shù)毓喙嘧墩{(diào)研研資料，φ750mmm的鋼筋混混凝土灌注注樁在當(dāng)?shù)氐貙嶋H工程程中應(yīng)用普普遍，施工工方法較為為成熟。因因此，附屬屬、輔助建建（構(gòu)）筑筑物地基處處理采用φ750mmm灌注樁短短樁方案是是可行的。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試驗面的的選擇SellectiionoofTeestGGrounnd本工程±0..00m標(biāo)高相當(dāng)當(dāng)于絕對標(biāo)標(biāo)高5.000m。綜合考慮施工的的便利性、氣氣候因素（下下雨）、場場地潮濕、試試驗的可行行性和試驗驗的安全性性等因素，灌灌注樁成樁樁及試驗工工作宜在回填后后的地面進進行。由于試樁樁工期較長長，故場地地回填范圍圍和高度應(yīng)充充分考慮氣氣候因素（下下雨）、施施工范圍、施施工材料和和機械作業(yè)業(yè)范圍和整整個試樁過程中中的便利性性，回填后地地面標(biāo)高應(yīng)應(yīng)不低于后后期施工過過程中降水水后現(xiàn)場的積水高度度，且不低低于絕對標(biāo)標(biāo)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試試樁場地的的選擇SSelecctionnofTestPileFielld試驗場地選擇擇在地質(zhì)條條件具有代代表性的地地段，綜合合試驗樁的的樁長及樁樁端持力層層等因素、勘測資料料及主要建建構(gòu)筑物區(qū)區(qū)域地層及及總平面布布置的情況況，由設(shè)計計、勘測等等共同確定定試樁場地地位置，試樁場地地位置如圖3.4--1所示。TestssiteseleectioonInntheegeoologiicalcondditioonsoofthhereepressentaativeeofthesitee,coompreehenssivetesttpilleleengthhanddpilleenndbeearinnglaayerandotheerfaactorrs,ssurveeydaataaandtthemmainconsstrucctionnareeaofftheeforrmatiionaandttheooveraallllayouutofftheesittuatiion,frommtheedessign,,surrveyandotheercoommonntodeteerminnethheteestFFigurre3..4-1showwsthhepoositiionoofthhepiilessiteandtheposiitionnofthetesttpillesiite.灌注樁試樁打打樁區(qū)域為為17.0×255.5m范圍，打打樁區(qū)域4角坐標(biāo)分分別為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樁樁參數(shù)的確確定DeteerminnatioonoffPillePaarameeter主要建筑物采采用Ф10000mm灌注注樁，樁長長約52米，樁端進進入持力層層(密實砂層層)不小于2d，預(yù)估估單樁豎向極限抗抗壓承載力力極限值約約為68550kN，預(yù)預(yù)估水平極極限承載力力為200kkN。附屬建筑筑物采用Ф750mmm灌注樁樁樁，樁長約為22m，樁端進入入持力層（密實粉質(zhì)質(zhì)黏土層）不不小于2d，預(yù)估估單樁豎向抗壓極限承承載力約26000kNN，預(yù)估水水平極限承承載力為130kkN。最終樁長和參數(shù)數(shù)根據(jù)樁前勘探資資料最終確確定，混凝凝土強度等等級為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..錨樁采用Ф11000mmm灌注樁樁，樁端進進入持力層層不小于22d，混凝土強強度等級為為fc'=50000psi混凝土，錨錨樁的錨筋筋高出樁頂頂1.5mm（在進行行靜載荷試試驗時，需需將錨樁的的錨筋進行行重新焊接接，錨筋加加長到4..5m，以以便錨樁與與試驗大梁梁連接）。試試驗樁樁間間距為8.5m，一字排排列。錨樁樁（反力樁樁）樁間距距8.5m，分踞在在試驗樁兩兩側(cè)，具體體裝參數(shù)見見樁位布置置圖（插圖圖3.5--1）。預(yù)估試試驗灌注樁樁SZ1--SZ3樁長約為52米,SZ4-SZ6樁長約為22米；M1-MM8錨樁樁長長為52米，M9-MM12錨樁樁長長為22米。最終樁長及參數(shù)需在試試樁勘探完完成后確定定。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..本次試樁綜合合考慮安全全、工期和和經(jīng)濟等因因素，建議議采用錨樁樁試樁方案案。若采用用配重方案案進行試樁樁，為了便便于施工，相相鄰樁間距距為10m,且需滿足ASTMMD11143-22007第6.11、6.2..1、6.3..1、6.4..1、6.4..2、6.4..3條規(guī)定。建建議配重所所能提供壓壓力不小于于預(yù)估極限承承載力的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頁HBEDFebruary,2017圖3.4-11：灌注樁樁試樁場地地布置圖Figgure3.4--1LaayouttofTesttPilleFiieldforCastt-in--placcePiile插圖3.5--1：樁位布布置圖及制制樁圖FFigurre3.55-1：PillelaayouttanddpillingdrawwingBangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第18頁HBEDFebruary,20174試驗方方案及實施施TesttSchhemeandImpllemenntatiion4.1試試樁場地勘勘探ExpllorattionandSurveeyoffTesstPileFieldd為確定試樁場場地工程地地質(zhì)條件是是否具有代代表性及試試驗結(jié)果的的對比分析析，在成樁樁前需對場場地進行地地質(zhì)勘測，擬擬在灌注樁樁試樁場布布置勘探孔孔4個，其中2個取樣孔孔、2個標(biāo)貫孔孔，孔深初初步定為557米。勘探探孔布置見見下插圖4.1--1，樁前勘勘探工作量量見表4.1--1.GGeoloogicaalexxplorratioonanndsuurveyyshaallbbecaarrieedouutbeeforeeforrminggpillesssoasstodeteerminneifftheegeoologiicalcondditioonofftesstpiileffielddisreprresenntatiiveaandttocoomparreanndannalyzzethheteestrresullt.IItissprooposeedtooarrrangeefouurexxplorratorryhoolesintthettestpileefieeld,ofwwhichhtwooareesammplinnghoolesandtheotheersaaresstanddardpeneetrattionholees,ppreliiminaarilyywithhdeppthoof57m.TThellayouutofexxplorratorryhoolesandtheworkkquaantittyoffexpploraationnbefforepiliingaaresshownninFiguure44.1-11anddTabble44.1-11resspecttivelly.插圖4.1--1試樁勘探孔孔布置圖Figuree4.11-1LLayouutoffexpploraatoryyhollesiinteestppilesitee樁前勘探工作作量一覽表表表4.1--1勘探點編號鉆孔類型地段孔口標(biāo)高（m）鉆孔深度（m）土樣個數(shù)標(biāo)準(zhǔn)貫入試驗(次)原狀擾動SK1標(biāo)貫孔灌注樁試樁場場區(qū)域4.05738SK2取樣孔4.05738SK3取樣孔4.05738SK4標(biāo)貫孔4.05738ThewoorkqquanttityofeexplooratiionbbeforrepiilinggTaable4.1--1SNofexpllorattionpoinntsTypesofddrilllingholeesDistriictTheellevattionofhhole--openning（m）Thedeepthofddrilllingholee（m）ThenuumberrofsoillsammpleStandaardppenettratiionttest(time))OriginnalsstateedisturrbancceSK1StandaardppenettratiionhholeTestppilefielldfoorcaast-iin-pllacepilee4.05738SK2Sampliinghhole4.05738SK3Sampliinghhole4.05738SK4Standaardppenettratiionhhole4.057384.2臨臨建施工TTempooraryyBuilddingandStruccturee施工場地和道道路平整、硬硬化工作必必須需滿足足施工要求求，不影響響施工進度度。Underthepremmiseofeensurringconsstrucctionnschhedulleanndmeeetinngthhecoonstrructiionddemannd,tthellevellingandharddeninngoffconnstruuctioonsiiteaandrroadmusttbeonsscheddule..施工用水需保保證正常的的施工用水水。Thecoonstrructiionwwaterrforrnorrmalusaggeshhallbepproviided..施工現(xiàn)場用電電需保證正正常的施工工用電。Thecoonstrructiionppowerrsuppplyshalllmaakessurethenormmaluusagee.制漿系統(tǒng)布置置在擬打樁樁場地附近近，并配置置臥式泥漿漿攪拌機、泥漿泵和泥漿，保證泥漿重復(fù)循環(huán)利用，減少對環(huán)境的污染。Apluppingsysttemcconsiistinngoffhorrizonntalslurrrymmixerrs,sslurrrypuumpaandsslurrryponddisarraangeddneaarbythepileedriivinggareea,soasttoprroduccesllurryyinareepetiitiveeanddcirrculaarmaannerranddalleeviattethheimmpactttotheenviironmmentcaussedbbypoolluttion..4.3施施工及要求求ConnstruuctioonanndittsReequirremennt4.3.1施工及設(shè)設(shè)備ConnstruuctioonanndEquippmentt灌注樁采用泥泥漿護壁正正循環(huán)回轉(zhuǎn)轉(zhuǎn)鉆機或泥泥漿護壁旋旋挖鉆機成成孔施工工工藝，主要要設(shè)備為成成孔鉆機、吊吊車、電焊焊機、經(jīng)緯緯儀、水準(zhǔn)準(zhǔn)儀等。具具體見施工工機具一覽覽表表4.3--1（不限限于表中所所列施工機機具）。Thecastt-in--placcepiileaadopttsfoorminngholeeprottecteedbyyslurrrywallinaappliicatiionoofciircullatioonsllewinngdrrilliingmmachiineoorrotarrydrrilliingrrig,mainnlyccompoosedoffformiinghholedrilllinggmacchinee,crrane,,eleectriicweeldinngmaachinne,ttheoddolitte,aandllevellgauuge,etc..witthmooreddetaiilsaasshhowninTTablee4.33-1.灌注樁施工機機具一覽表表表4.3--1序號機具名稱型號規(guī)格單位數(shù)量備注1鉆機（成孔）臺2設(shè)備型號與當(dāng)當(dāng)?shù)胤职躺烫峁┰O(shè)備備為準(zhǔn)2吊車25T輛13電焊機臺34鋼筋彎曲機臺15鋼筋切割臺16鋼筋調(diào)直機臺17氣焊工具套18經(jīng)緯儀臺29水準(zhǔn)儀臺1Constrructiionmmachiinesandtoollsfoorcaast-iin-pllacepileeworrkTabble44.3-11SNItemTypeaandMModellUnitQuantiityNote1Drilliingmmachiine（holee-forrmingg）Set2Thetyypeaandmmodellareesubbjectttotheonessproovideedbyyloccalccontrractoors2Crane25TNo.13ElectrricwweldeerSet34RebarbenddingmachhineSet15RebarcutttingmachhineSet16RebarstraaightterSet17GasweeldinngtooolSet18TheodooliteeSet29LevelgauggeSet14.3.2記錄和取取樣ReecorddanddSammplinng記錄嚴(yán)格按照照灌注樁成成樁規(guī)定的的內(nèi)容和格格式進行施施工記錄，要要求真實、準(zhǔn)準(zhǔn)確。灌注注樁記錄表表見表4.3--2。Duriingcconsttructtion,,theereccordssshaallbbeprroperrlymmainttaineedinnconntenttsanndfoormattspeecifiiedbbythheprrovissionssofformmingpileeofcastt-in--placcefoorminngpiile.Thesampplettableeofcastt-in--placcepiileiisassshoowniinTaable4.3--2.BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第19頁HBEDFebruary,2017表4.3--2鉆孔灌注注樁施工記記錄表工程名稱：施工單位位：設(shè)計樁徑徑：mm砼強度等等級：使用部位位：序號日期樁號孔口標(biāo)高（mm）鉆孔時間首次沖孔時間間設(shè)計深度（mm）實測深度（mm）吊籠深度（mm）下導(dǎo)管時間二次沖孔時間間泥漿比重沉渣厚度（cm）灌注時間砼塌落度（mmm）砼灌注量（mm3）充盈系數(shù)機號開始結(jié)束開始結(jié)束開始結(jié)束開始結(jié)束開始結(jié)束設(shè)計方量實際方量量工程負(fù)責(zé)：：工長：記錄：BangladeshS.ALAM2×660MWCoal-firedPowerPlantTheOutlineofPrototypeTest第20頁HBEDFebruary,2017Tablle4..3-2ReccordsheeetoffBorredCCast--in-pplaceePilleProjecctnaame：Consst