省道303线巴朗山隧道围岩温度场与保温设计参数分析

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1、_—。。●l。。_I_-。。●—。-。。_。。。。。-_--————————————————————————————————————————————————————————————～一——西南交通大学硕士研究生学位论文第lI页AbstractThethesismainlystudiestunnelsurroundingrockgeothermalfieldandthermalinsulationlayerdesignparametersofBalangshanmountaintunnelwhichlocatedathighandcold

2、moutainregion．Thenumericalsimulationtheoreticalbasisisthermalanalysis．Throughlaboratorytest,numericalsimulationmethods，thethesissimulateshighcoldmoutainregiontunnelsurroundingrockgeothermalfiledandsuppliesproperthermalinsulationlayerdesignparameterstotheproject．Theresult

3、sconsistoffollowingaspests．(1)MakinguseofANSYSsoftwareasatooltosimulatetunnelregioninitialgeothermaltemperaturefieldandsupplyboundaryconditionstotheexcavatedtunnelsurroundingrocktemperaturefield．111econclusionisthatthetunnelsurroudingrockbdowthesurface3．2meterinitialtemp

4、eratureisgreaterthan0℃．Thesurroundingrock’Slowesttemperatureis4．6035。C，locatedatK97+730，andthehi曲esttemperatureis15．254"C，locatedatK102+23．(2)MakingUSeofrocktemperaturewhichmeasuredinboretocheckthereliabilityandtheaccuracyofthenumericalsimulation．Thethesiscomestotheconcl

5、usionthatthenumericalsimulationhashigherreliabilityandaccuracy．(3)Buildingtwodimensionstransientcalculatingmodeltosimulatethedepthoffrostpenetrationofthetunnelsuroudingrockwhichisapartfromtunnelentrance10m．Theconclusionisthatthelongerofthecalculatingtime，thedeeperofdepth

6、frostpenetration．(4)Forthesecuritypurpose，weselectextrememinimumtemperatureandthelongestcalculatingtime30daysastheloadconditionsandexerttheminthethermalinsulationlayerdesignmodel．111ecalculationgresultsshowthatwhenlaying5cmaluminasilicatefibrethermalinsulationmaterialint

7、hesurfaceofthetunnelsecondarylining，itcaneffectivelyprotectsthetunnelsecondaryliningandthetunnelsurroundingrockfromfreezing．Keywords：highandcoldmountainregion；highwaytunnel；geothermalfield；tunnelantifreeze；thermalinsulationmaterials西南交通大学硕士研究生学位论文第1II页目录第1章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．1选题意义和研究背景⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11．2国内外研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．21．2．1寒区隧