資源描述:
《淺論公路隧道開(kāi)挖過(guò)程的數(shù)值模擬分析及研究》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、分類(lèi)號(hào):TU一4107lO一20050838諼步夫海碩士學(xué)位論文公路隧道開(kāi)挖過(guò)程的數(shù)值模擬分析及研究導(dǎo)師姓名職稱(chēng)申請(qǐng)學(xué)位級(jí)別論文提交日期學(xué)位授予單位丁偉石堅(jiān)副教授答辯委員會(huì)主席學(xué)位論文評(píng)閱人郭增玉郭增玉俞宗衛(wèi)摘要本文在論述當(dāng)前隧道結(jié)構(gòu)穩(wěn)定性研究現(xiàn)狀的基礎(chǔ)上,從隧道圍巖壓力入手,介紹了圍巖的初始應(yīng)力狀態(tài)以及圍巖松動(dòng)壓力的確定方法;通過(guò)對(duì)支護(hù)結(jié)構(gòu)與圍巖相互作用的力學(xué)分析,建立了圍巖與支護(hù)結(jié)構(gòu)平衡狀態(tài)。闡述了隧道結(jié)構(gòu)數(shù)值計(jì)算方法及有限元數(shù)值分析過(guò)程,分析了ANSYS在模擬隧道開(kāi)挖過(guò)程中的應(yīng)用和實(shí)現(xiàn)。結(jié)合安徽六潛高速公路磨子潭III號(hào)隧道,應(yīng)用有限元軟件ANSYS建立了隧道計(jì)算
2、模型,采用彈塑性方法及Mohr-Coulomb屈服準(zhǔn)則,對(duì)該隧道ZK58+210斷面分步開(kāi)挖和支護(hù)進(jìn)行模擬,得到了各個(gè)開(kāi)挖階段的位移、應(yīng)力圖、支護(hù)結(jié)構(gòu)內(nèi)力圖以及開(kāi)挖前和開(kāi)挖后隧道圍巖與支護(hù)結(jié)構(gòu)的位移、應(yīng)力變化規(guī)律。工程實(shí)例數(shù)值分析表明,計(jì)算結(jié)果與實(shí)測(cè)結(jié)果相近,表明了本文選用的方法和模型的合理性,平面應(yīng)變和梁?jiǎn)卧M成的組合結(jié)構(gòu)模型及各種參數(shù)可以較好的反映隧道開(kāi)挖和支護(hù)的受力和變形性能。同時(shí),提出了磨子潭隧道的施工技術(shù)方案和施工中的注意事項(xiàng),也為整個(gè)隧道的安全、順利施工提供了理論依據(jù),也可作為類(lèi)似隧道設(shè)計(jì)施工的參考依據(jù)。關(guān)鍵詞:隧道開(kāi)挖、ANSYS、有限元法、數(shù)值模擬、支護(hù)
3、AbstractThispaperbasedondiscussionoftheresearchpresentstatusthatthetunnelstructurestabilization,obtainedfromthetunneladjacentformationpressureintroducedtheadjacentformationinitialstressconditionaswellastheadjacentformationloosepressuredefinitemethod.Throughmechanicsanalysiswhichmutuallya
4、ffectstosupportstructurethestructureandtheadjacentformation,hasestablishedtheadjacentformationandsupportstructurethestructurestateofequilibrium.Then,representingthetunnelstructurenumericalsimulationmethodsandtheanalyzingcourseofthefiniteelement,andanalyzingANSYSapplicationattheimitationo
5、fthetunnelconstruction.BasedonMoZiTan-No.IIItunnelengineeringoftheLiuQianhighwayinAnHuiProvince,establishingthetunnelcalculationmodelbyANSYS,usingtheelastic-plasticmethodandyieldcriterionofMohr-Coulombtosimulatethecuttingandsupportingoncross—sectionZK58+210ofthistunnel,obtainedmotionstre
6、ssgraphofeachcuttingstepandthechangingregularofmotionstressaboutthecuttingforeandafter.Theresultsforapracticalprojectshowedthevalidityofthemodelandthenumericalmethod,thecombinationconstructionmodelcomposedbyplanstressandbeamconcomitancewiththoseparameterchoosebyauthorcanworkedonthestress
7、anddistortionduringthetunnelexcavationandliningwell.Atthesametime,extracti·ngtheconstructiontechnicalversionandtheattentionthingsaboutMoZiTantunnelandsupplyingthecredibilitytheoryaccordionofthesafetunnelconstruction,andwilldirectthelikenesstunnelconstructionwillhavegoodre