桩端后注浆有效注浆量计算方法的探讨

123Vol．1220166ChineseJournalofUndergroundSpaceandEngineeringJun．2016*200070。。。10%～20%。、、。TU473A1673-0836201603-0789-06DiscussiononCalculationMethodofEffectiveGroutingVolumeofPile-endPost-groutingWangYanYinJiShanghaiGeotechnicalInvestigations＆DesignInstituteCo．Ltd．Shanghai200070P．Ｒ．ChinaAbstractCommonlyusedcalculationmethodsofgroutingvolumeareimprovedbyresearchingonthegroutdiffu-sionmechanismofpile-endpost-groutinginthispaperandanewcalculationmethodisputforward．AccordingtothemethodinthispaperbasedonCylindricalsphericalcavityexpansiontheorythestaticconepenetrationtestindexspecificpenetrationresistancePsisusedasinputparameterandthegroutingstopswhenthesoilaroundthepileisdamaged．Sothecalculatedvalueofeffectivegroutingvolumeofpile-endpost-groutingisthemaximumvalue．bycomparingthecalculatedvaluewithactualgroutvolumeofpost-groutinginthreesuperhigh-risebuildingsitisshowedthatthecalculatedgroutingvolumeisalmosttwotimesofstandardmethodorthatby‘ZhangZhongmiao’methodanditis10～20%greaterthanSKYmethod．Thismethodismoresuitableincohesivesoilsiltysoilpowdergranulatedsandandcoarsesandstratum．Keywordsboredpilepost-groutingtechnologybearingcapacitygroutingvolumesimplifiedcalculationmethod1。。、。。*2015-10-191981-。[e-mail]2“”、“”“”。《》JGJ94—200816．7．4“、、、”Gc=αpd+αsndαp、αsαp=1．5～1．8αs=0．5～0．7、、ndmGct。2600、Q=3．451D－0．285Q=1．924D2+0．287Q=3．177D－0．281Q=2．007D2+0．159DmQt。300m。Q=βDββ=5～6DmQt。。6001．0m5．0～8．0t、。、、2．0t、2．3t5．0t。。。、。33．1、、。。“”“”1。。1～2MPa。“”3。1Fig．1Sketchofresultantforpile-endpost-grouting3．2。。2⑦1cm“”、5～8cm。3。3。、097122Fig．2Theresultantforpile-sidepost-grouting。“”。3Fig．3Sketchofresultantforpile-sidepost-grouting44．11。。2“”、2。3“”。4。4．2。Qp=43πr3Qpr。4．3Qs=Σni=1πDδi+uihiQs—δi、、0．5～1．0cmuihi。2u=p－p0d4G=p－p01+υd2Epp0υ、E。p－p0。《》TB10018—20034pu=3．74p0．58s+471500＜ps＜24000Q4pu=0．94p0．8s+8700＜ps＜3000psMPa。。、、90%～95%105～110%5～14。75%0．75pu。《》1972016315、E0=3．57p0．684sE0=6．03p1．45s+0．855．11。1．0m50．7m。6．0t0．55。1100t。0．52m34．85m35．37m36．03t。1。11Table1Calculatedvaluesofpile-sidegroutingvolumeforcase1/m/kPa/MPa/kPa/kPa/cm/m3/m3/m3③3．176933．34563422．950．290．050．34④8．888451．22852141．630．450．140．59⑤、8．9132537．67125342．680．750．140．89⑥9．982323．64813612．920．910．161．06⑦20．0142548．57575672．651．660．311．985．22B11．0m69．0m。5．0t0．55。1100t。0．52m34．84m35．36m36．03t。2。22Table2Calculatedvaluesofpile-sidegroutingvolumeforcase2/m/kPa/MPa/kPa/kPa/cm/m3/m3/m3③10．6103181．43122341．530．510．170．68④23．5214862．34743561．120．120．050．18⑤13．0112155．96204652．780．260．050．31⑤25．61881513．09577182．560．450．090．54⑥13．6160941．94033021．270．140．060．20⑥23．4354543．36284710．900．100．050．15⑦6．21983214．110017512．540．490．100．59⑧2．1571414．78186140．720．050．030．08⑨11．41918813．49737302．550．910．181．09⑩18．9512924．37715780．760．210．140．35⑩26．6301723．05744300．960．200．100．30⑾4．12387918．811738802．450．320．060．38297125．331．0m63．0m。5．0～8．0t0．5517．4kN/m3。1000t。0．52m35．62m36．15m36．90t。3。33Table3Calculatedvaluesofpile-sidegroutingvolumeforcase3/m/kPa/MPa/kPa/kPa/cm/m3/m3/m3⑥4．0316123．085894420．940．120．060．18⑦110．51818112．339296972．550．840．161．01⑦226．03014826．91143410762．371．940．412．35⑦35．02252317．1611168372．470．390．080．47⑨17．02182016．3410868142．480．550．110．66⑨2-110．52374718．6211688762．450．810．160．976。1。2、。。3、、、。“”。410%～20%。。。5。。Ｒeferences1JGJ94—2008S．2008．Tech-nicalcodeforbuildingpilefoundationsS．2008．inChinese2．M．2009．ZhangZhongmiao．Post-groutingtechnologyofboredpileanditsengineeringap-plicationM．BeijingChinaArchitecture＆Building39720163Press2009．inChinese3．J．201440553-55WeiJianhuaThepileendpostgroutingpilebearingcapacitycalculationofequivalentpilemethodJ．ShanxiArchitecture201440553-55inChinese4《》S．2003．CodeofinsitumeasurementofrailwayengineeringgeologyTB10018—2003/J216—2003S．2003．inChi-nese5．J．200221111740-1743．ZhangZhongmiaoTangChaowen．TechnologyessentialsofbottomgroutingofboredpilesJ．ChineseJournalofＲockMechanicsandEngineering200221111740-1743．inChinese6．J．2009283475～1743．ZhangZhongmiaoZhangQianqing．Experimentalstudyonmechanicalpropertiesofpost-groutingcompressivepileJ．ChineseJournalofＲockMechanicsandEngineering2009283475-1743．inChinese7．J．200323685-90．ZhangZhongmiaoXinGongfeng．Theapplicationeffectanalysisofpost-groutingunderboredpileswithdifferentbearingstrataJ．JournalofBuildingStruc-tures200323685-90．inChinese8．J．1999216681-686．ZhangZhongmiaoWuShimingBaoFeng．StudyofmechanismandapplicationofboredpileendpostgroutingJ．ChineseJournalofGeotechnicalEngineer-ing1999216681-686．inChinese9．J．201029122565-2572．ZhangZhongmiaoHeJingyuZouJian．Experimentalstudyofbehaviorcom-parisonofgroutedandnon-groutedupliftpilesinsoftsoilJ．ChineseJournalofＲockMechanicsandEngi-neering201029122565-2572．inChinese10．J．2003245804-808．GuoQuanquanLiZhu．Experimentalresearchandanalysisofcast-in-placepileswithexpanded-baseandpost-groutingJ．ＲockandSoilMechanics2003245804-808．inChinese11．J．2002246743-746．HeJian．Experimentalresearchonverticalbearingpropertiesofbase-groutingboredcast-in-placepileJ．ChineseJournalofGeotechnicalEngineering2002246743-746．inChinese12．、J．2004265709-711．ZhangZhongmiaoXinGongfengXiaTangdaietal．Analysisonef