隧道冻害发生机理及其防治措施的研究

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1、分类号：U44，U4510710—20040110壤步太海硕士学位论文隧道冻害发生机理及其防治措施的研究罗彦斌导师姓名职称陈建勋副教授申请学位级别论文提交日期学位授予单位答辩委员会主席学位论文评阅人王华牢教授级高工顾安全教授王华牢教授级高工AbstractColddisasterslikethefractureontheliningsurface，peelingoff，icecovering，wateringandfreezingoftheroadsurfaceintunnelshavebeengreatlyw

2、eakeningtheservicecapacityandproducingheavyburdenonthemaintenanceofmanytunnelsbuiltincoldareasinOurcountry．Withthedevelopmentoftransportationinfrastructure，thetunnelprojecthasbeengraduallyextendingtothehighaltitudecold．Compared、析thtraditionaltunnelsinthecold

3、area，thesetunnelswilltakelargesizeandrequirehighertechnology．Moreover，theextremeclimaticconditionsareveryunfavorableforthesetunnels．Therefore，problemsofhowtotakeeffectivemeasurestopreventcolddamagesfromhappeningduringconstructionhaveconstantlycomingintoOUrvi

4、ewandstillremaintobesolved．Inordertothese，thepaperdidacasestudyontheapplicationofthetunnelanti—freezinganddamagepreventiontechnologyintunnelsincoldareasbyreferringtoalargenumberofdomesticandforeignliteratureandtakingtheactualconstructionofXiangyunlingTunnela

5、sanexample．Themaincontentsofthestudyinclude：(1)Thepaperthoroughsurveyonthefrostheavingcharacterofrockandconcrete，revealsthemechanismofthecolddamageoftunnel．(2)Thepaperproposedaassessstandardforextentlevelofexistingroadtunnelcolddamage．(3)ThepaperCalTyoutOUrr

6、esearchontechnicalmeasurestopreventthecolddamageoftunnelmainlyfromdrainageandinsulationside．(4)TakingtheactualconstructionofXiangyunlingTunnelasallexample，wehavedoneacomprehensive，systematic，long-termmonitoringforthetemperaturefieldoftunnelsinthecoldarea．Wel

7、earnedtheruleofthetunneltemperaturedistributionbysinfunctionregression---amathematicalstatisticsmethodusuallyusedinmeteorology．(5)Wecarriedoutthoroughresearchonthedesignoftheanti—freezinglayer，includingthechoiceofthematerial，thedecisionofthethicknessandlengt

8、hofthelayer．(6)Inordertodeterminetheoptimumthicknessofcoldinsulationlayer，somecalculationsweremadesinglybythewayofequivalentthicknessconversion，weatheranalyticmethodandfiniteelementsimulationmet