圍巖穩(wěn)定性論文：高地應(yīng)力公路隧道施工圍巖穩(wěn)定性研究

1、【中文摘要】基于圍巖穩(wěn)定性理論，詳細(xì)分析了影響高地應(yīng)力區(qū)公路隧道圍巖穩(wěn)定性的因素，進(jìn)而對(duì)高地應(yīng)力區(qū)公路隧道圍巖穩(wěn)定性主要影響因素進(jìn)行量化分析，并針對(duì)高地應(yīng)力隧道施工引起圍巖應(yīng)力集中與變形過(guò)大問(wèn)題采取合理的卸壓支護(hù)措施進(jìn)行數(shù)值模擬研究，為高地應(yīng)力區(qū)公路隧道設(shè)計(jì)與施工提供科學(xué)的理論依據(jù)。本文研究的主要成果如下：1.從高地應(yīng)力定義、單元類型、網(wǎng)格劃分、邊界條件、圍巖破壞模式、模型參數(shù)等方面入手，建立高地應(yīng)力公路隧道數(shù)值模型，對(duì)數(shù)值模型進(jìn)行驗(yàn)證，并提出本文計(jì)算流程。2.依據(jù)圍巖穩(wěn)定性理論，通過(guò)數(shù)值模擬方法，針對(duì)圍巖的強(qiáng)度、隧道埋深、跨度、側(cè)壓力系數(shù)、斷面形式、高跨比等因素在高地應(yīng)力隧道施工過(guò)程中對(duì)圍巖

2、穩(wěn)定性影響有所不同，建立數(shù)值分析模型，對(duì)圍巖穩(wěn)定性的影響因素進(jìn)行了分析。得出圍巖強(qiáng)度、埋深、跨度是影響高地應(yīng)力隧道圍巖應(yīng)力與變形的主要因素，同時(shí)側(cè)向壓力系數(shù)、高跨比對(duì)高地應(yīng)力隧道圍巖應(yīng)力與變形也具有一定的影響，斷面形式的變化對(duì)圍巖應(yīng)力與變形影響較小。3.通過(guò)數(shù)值模擬，對(duì)高地應(yīng)力公路隧道施工影響圍巖穩(wěn)定性的主要因素進(jìn)行量化分析，得到了圍巖應(yīng)力與變形的影響規(guī)律及量化公式，并用數(shù)值模擬結(jié)果對(duì)量化公式進(jìn)行比較，分析可以應(yīng)用于高地應(yīng)力隧道施工估算最大圍巖應(yīng)力與變形。4.針對(duì)隧道施工后圍巖應(yīng)力集中與變形過(guò)大，采取卸壓槽法、鉆孔卸壓法、襯砌選擇、錨桿布購(gòu)買全文在線加QQ139938848即付即發(fā)同時(shí)提供論文

3、寫作指導(dǎo)和學(xué)術(shù)期刊發(fā)表服務(wù)在:本立為學(xué)術(shù)立獻(xiàn)總庫(kù)合作提供I如有異溟請(qǐng)與總庫(kù)或?qū)W校聯(lián)系"0置等卸壓支護(hù)措施。通過(guò)數(shù)值模擬分析，效果明顯，為實(shí)際高地應(yīng)力隧道工程設(shè)計(jì)與施工提供科學(xué)的理論依據(jù)。【英文摘要】Basedonthetheoryofthestabilityofsurroundingrock,thepaperhadanalyzeddetailedlythefactorsofinfluencinghighgroundstresssurroundingrock'sstabilityandthenhadaquantitativeanalysisinallusiontoSeveral

4、largerfactorsofinfluencinghighgroundstresssurroundingrock'sstabilityandtookreasonabledischargingpressuresupportmeasuresaccordingtotheproblemsofhighgroundstressconcentrationandlargedeformationinsurroundingrocktunnelconstruction,thatprovidedcertaintheoreticalbasisforhighgeostresstunnelconstruction

5、.Thispaperstudiesthemainworkwasasfollows:1.Fromthehighgeostressdefinition,types,gridpartition,unitboundaryconditions,wallrockfailuremode,modelparameterandteaching,ahighgeostresshighwaytunnelnumericalmodelwasestablished,thenumericalmodelwasvalidated,anditputforwardthecalculationprocedureinthispaper.2

6、.Accordingtothestabilityofsurroundingrockoftheoryandthroughnumericalsimulationmethod,itsetupalargeamountofnumericalmodeltoanalyzeaffectofsurroundingrockstressanddeformationintheprocessoftunnelexcavationanditcontrastedthattheinflueneeweightsofvariousfactorsonaccountofparametersofsurroundingrock,tunne

7、lburieddepth,tunnelholediameterandthelateralpressurecoefficient,tunnelprofileformaswellasdepth-spanratiosixfactorschangeintheprocessofthesurroundingrocktunnelconstructiontoleadtothedeformationandstressofthesurroundingrockweredifferentforms.Itdrawthatthestrengthofsurroundingrock,burieddepth,spanweret

8、hemainfactoronhighgroundstresssurroundingrockstressanddeformationandlateralpressurecoefficient,highcrossthanalsohadacertaineffectforhighgeostresssurroundingrockstressanddeformation,theformchangesofthesectionofsurroundingrockwassmallinflueneeonstressanddeformation.3.Throughnumericalsimulation,itquantitativelyanalysisthemainfactorsoftheinfluenceonthestabilityofsurroundingrockInthehighgeostresshighwaytunnelconstructionprocesstobtainedquantitativeformulaandtheinfluencelawofthesurroundingrockstressanddeformation,andnumericalsimulationresultsofth