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1、Y1085282分類號(hào)??UDC密級(jí)編號(hào)?午南大學(xué)CENTRALSoUTH刪VERSITY碩士學(xué)位論文論文題目學(xué)科、專業(yè)研究生姓名一旦腿詹掏法隧蔓旋曼n起的??地表潺降衾搋曼熬值摸拯????.崖?圭?墨一猩????????一李?.曙?.燾?????導(dǎo)師姓名及專業(yè)技術(shù)職務(wù)???杰?堡?.虬?熬攮??2006年10月10日摘要采用盾構(gòu)法修建城市地鐵隧道時(shí),如何預(yù)測(cè)和控制因開(kāi)挖造成的地表沉降,是施工所面臨的一個(gè)重要問(wèn)題。本文結(jié)合南京地鐵盾構(gòu)法隧道工程實(shí)例,通過(guò)現(xiàn)場(chǎng)測(cè)試與試驗(yàn)、理論研究和數(shù)值模擬計(jì)算,對(duì)隧道施工引起的地表沉降及地層位移
2、進(jìn)行了深入的研究,主要進(jìn)行了以下工作:(1)研究了土壓平衡盾構(gòu)法隧道施工產(chǎn)生的幾何效應(yīng)和力學(xué)效應(yīng),探討了地表沉降的機(jī)理。(2)根據(jù)施工監(jiān)控量測(cè)數(shù)據(jù),結(jié)合隧道埋深、地層條件、掘進(jìn)參數(shù)設(shè)置等因素,對(duì)南京地鐵一號(hào)線玄武門(mén)站~許府巷站及許府巷站~南京站區(qū)間,土壓平衡盾構(gòu)法隧道施工引起的土體變形特性進(jìn)行了分析,研究了地表沉降過(guò)程及其分布規(guī)律。。(3)結(jié)合施工監(jiān)控量測(cè)數(shù)據(jù),對(duì)影響地表沉降的主要因素:土艙壓力設(shè)置、注漿參數(shù)設(shè)置和出渣的控制進(jìn)行了分析,并討論了由于施工參數(shù)設(shè)置不當(dāng)引起的事故實(shí)例,總結(jié)了一些經(jīng)驗(yàn)。(4)采用FLAC3D程序,使用
3、DruekeroPrager彈塑性屈服準(zhǔn)則,對(duì)許府巷站~南京站區(qū)間盾構(gòu)法隧道施工開(kāi)挖全過(guò)程嚴(yán)格按照施工工序進(jìn)行了三維數(shù)值模擬,考慮了隧道埋深、地下水位、盾構(gòu)機(jī)械、地層損失、土艙壓力、注漿壓力等因素對(duì)地表沉降的影響。關(guān)鍵詞:盾構(gòu)法隧道,施工監(jiān)控j地表沉降,三維數(shù)值模擬ABSTRACTForecastingandcontrollingthegroundsettlementinducedbyexcavationisveryimportantinconstructingcitysubwaytunnelwithshielddrivenm
4、ethod.CombingwithshieldtunnelingpracticeofNanjingsubway,onthebasisoffieldmeasuringandtesting,theoreticalanalysisandnumericalsimulation,thisthesismakesastudyonthebehaviorofgroundsettlementinducedbytunneling.Themainresearchresultsareasfollowings:1.Themechanismofground
5、settlementisdiscussedbasedonanalysisofthegeometricaleffectsandmechanicaleffectsofEPBshieldconstruction.2.Onthebasisofmonitoringdata,andconsideringtunneldepth,geologicalcondition,openingparametersandotherinfluentialfactors,thecharacteristicsofsoildeformationinducedby
6、EPBshieldtunnelingintheintervaltunnelsfi'omXuanwumentoXufuxiangandfromXufuxiangtoNanjingrajlwaystationinNanjingNo.1Subwayareanalyzedinthisthesis.Thenthedevelopmentprocessanddistributionofthegroundsettlementareobtained.3.Usingthemonitoringdata,itstudiesintothemaininf
7、luentialfactorsonthegroundsettlement,suchasearthpressureinthecutterchamber,routingparameterandslagtappingcontr01.Italsodiscussesseveralconstructionfaultscausedbysettinginappropriateconstructionparametersandachievedmanyusefulconclusions.4.Using3DFastLagrangianAnalysi
8、sofContinua,F(xiàn)LAC3DwithDrucker-Prageryieldcriterion,a3-DnumericalsimulationofthewhollyshieldexcavationprocessoftheintervaltunnelfromXufuxia