大型深水灌注樁樁端后壓漿技術

1、東南大學碩士學位論文大型深水灌注樁樁端后壓漿技術姓名：劉鷺申請學位級別：碩士專業(yè)：巖土工程指導教師：龔維明戴國亮20080501AbstractAbstraetWiththeincreasingofhigh—risebuildingloadsandbridgespan，therearehigherrequirementstothebeatingcapacityofboredpile，consequently，thediameterand

2、lengthofboredpileenlargingUnfortunatelybecauseoftheeffectoftraditionalconstructiontechniquetheboredpileshavesomedrawbackssuchassedimentationonthebottomofpilesandmudaroundtheshaft，whichweakenthepileendbearingandpileskinfr

3、ictionandleadtooverlargesettlementWiththeuseofbasepostgroutingwhichis鋤excellenttechniqueduetoitsupgradingthebehaviorofborepile，thosedisadvantageswillbeovercomeBeingpartofnationalscientifictechnologysupportproject(2006BAG

4、04800)andtransportationscientifictechnologyprojectofJiangsuprovince(04Y029)，thedissertationstudiesandanalysesthemechanismofaction，thedesignofbasepostgroutingboredpilesandtheengineeringapplicationsThemaincontentsaregivena

5、sfollows：(1)ThemechanismofactionofpostgroutingtechnologyisanalyzedOnthebasisoftheavailableengineeringdatathemajorfactorswhichhaveinfluenceonthebearingcapacityofbasepostgroutingboredpilesaregeneralizedTheformulatocalculat

6、eradialdisplacementofSoilsaroundapileinthestateofelasticorplasticelasticisgivenbyapplyingcavityexpandingtheoryandtheincrementexpressionisalsogiven(2)Combiningwiththecontrasttestsbeforeandaftergroutingofthebasepostgroutin

7、gboredpilesindeepwaterinthefiveoversizebridgeathomeandabroad，thisdissertationtakethefurtherstudyontheloadtransfermechanismbeforeandaftergroutinganalyzethegroutingeffectandgeneralizetheloadbearingcharacteristicsofthebasep

8、ostgroutingboredpilesindeepwater(3)Onthebasisofgeneralizingandevaluatingthedesignmethodsofbasepostgroutingathomeandabroad，thereasonabledesignformulasofgroutingamountandbearingcapacityofboredpilearepresented，andthetestdat