基坑開(kāi)挖引起下臥隧道隆起的研究分析.pdf

1、同濟(jì)大學(xué)碩士學(xué)位論文基坑開(kāi)挖引起下臥隧道隆起的研究分析姓名：陳郁申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：李永盛張冬梅20050101AbstractTheareasalongthetunnelshavebecomethecommercialcenterwiththedevelopmentoftheundergroundrailwayMoreandmoredeepexcavationsarecarriedoutaboveoradjace

2、nttotheexistingtunnelsTheadjacentexcavationwillnodoubtinducethedeformationofsoft—claythenresultintheverticaldisplacementoftunnelsandthreatengreatlyonthesafetyoftunnelsConsequentlyhowtopredictandcontrolthedisplacementandh

3、owtoprotecttheexistingtunnelsbecometheimportantengineeringissueBasedonDongfangRoadUndergroundCrossingProjectinShanghai，thefieldmonitoringdata，theMindlinelasticmethod，thetheoryofelasticfoundationbeamand3DFEMareemployedtos

4、tudytheinfluenceofexcavationonunderlyingexistingtunnelsThemainconclusionsaredrawnasfollows，whichCanbeheIpfulforthepracticalengineering1Theinfluenceofexcavationontheunderlyingexistingtunnelsisanalyzedbasedonthein—situmeas

5、ureddataintermoftheheavingofthetunnelThedevelopmentofthetunnelheavewithexcavationtimeaswellastherelativedistancebetweenexcavationandexistingtunnelisstudied2Theevolutionofstressexertedontheunderlyingtunnelduetoexcavationi

6、spredictedwithMindlintheoryThen，theelasticfoundationbeamtheoryisadoptedtocalculatetheheavingofunderlyingtunnelwithcalculatedstressThecomparisonbetweenmeasuredandcalculatedmaximumheavingoftheunderlyingtunneliscarriedout。A

7、nengorgementagreementisfoundAdditionallytheellorsbetweenthemeasuredfielddataandcalculatedheaveofthetunnelareinterpretedTheeconomicalandreasonableengineeringmeasurementsthatarecontributingtothesafetyoftheunderlyingtunnelc

8、anbededucedfromtheabove3UsingthecommercialFEMsOf舊are_—一Marc，theeffectofexcavationandunloadingprocessonunderlyingexistingtunnelsisinvestigatedAcomparisonbetweenmeasuredfielddataandFEMresultsisperformed4Bythecomparisonoffi

9、eldmonitoringdata，analyticsolutionand3DFEMnumericalsolutiontheadoptedcalculationmethodsarevalidatedandtheirengineeringapplicationsarediscussedKeywords：excavationtunnelheaveMindlinelasticsolutionelasticfoundationbeam3DFEM