資源描述：
《地質(zhì)順層偏壓隧道偏壓作用的數(shù)值分析》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、西南交通大學(xué)碩士學(xué)位論文地質(zhì)順層偏壓隧道偏壓作用的數(shù)值分析姓名：鄧彬申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：橋梁與隧道工程指導(dǎo)教師：周曉軍20070501西南交通大學(xué)碩士研究生學(xué)位論文第fl頁(yè)AbstractInthemountaintunnelconstructionprocess，usuallythetunnelwillpassthroughthelayeredrock．ItisadifficultproblemtoanalyseandcalculatethepressureOntheliningandthesafetyofthestructure．Withthehelpoftheore
2、ticalanalysisandfiniteelementmethod，thethesisstudiesthecalculationmethodforasymmetricpressureonsingle-linerailwaytunnelembeddedingeologicallybeddingstrata，andthefactorsoflayerthicknessandinclinedangleonasymmetricpressure．Thethesisstudiesthefollowingaspects：(1)Basedonthestudyofcertainliterat
3、ure，thethesisgivestheloadsdistribution011theliningstructureingeologicalbeddingstrata,withacertainassumptions,andtherewillnotexistasymmetricloadsunlessinclinedanglegreaterthanthefrictionangleofthebeddingplane．(2)Thethesissimulatesthebeddingsurfacewithsandwichelementandcontactelementmethodres
4、pectively,findingtheresultsthethickerthelayer,thesmallertheerror．Withtheincreaseoftheinclinedangle，theerroroftwomodelsisdecreased，andthenincreasing．Theerrorofsandwichelementisgreaterthanthecontactelement,butisacceptableinenglneeringerrorrange．Thethesissimulatesthejointwithsandwichelementmet
5、hod．(3)withacertainclinedangle，theloadontheleftwallisgreaterthantherightwall．Withtheincreaseofthelayerthickness，thelnsdonthevaulttrendstoaconstantvalue，butthewallwillbearamoreasymmetricload．f4)withtheincreasingoftheinclinedangle,theasymmetricloadontheliningstructureisincreasing，andthendecre
6、ased,whichattainitsultimatewheninclinedanglerangesbetween45and55degree。(5)Theinclinedanglehasroleontheliningstructure．Withtheincreasingoftheinclinedangle，themomentonthevaultispositive,andthennegativelyincreasing．Themomentontheleftwallattainsitsultimatewhentheinclinedangleis55degree．Thediffe
7、renceofmomentonthespandrelattainsultimatewheninclinedangleis45degree．(6)nereatesomemeasurestOdecreasetheharmofasymmetricloadappliedbygeologicallybeddingstrata，suchassectionasymmetricdesignandasymmetric西南交通大學(xué)碩士研究生學(xué)位論文第1II頁(yè)reinforcementfortheliningstructur
