Page 196 - 《水资源与水工程学报》2024年第2期
P. 196
!35 "!2 # & ' ( ) & * + , - Vol.35No.2
2024 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2024
DOI:10.11705/j.issn.1672-643X.2024.02.22
'¬s ®¯fj?u°±²³´
µ¶·Y¸¹º»
1 2 2 2
-./ , *01 , !23 , '45
(1. Ù[GL1& ]kLM&g, Ù[ ÜT 454000;2. ÿ+ÖÝÞLMß+à, Ù[ ÚÛ 471000)
A B: l:DQRC]Â5AÔáCªâ, ãø±Æ¢ÂäåªÿæÔçèéÈPc.êë5A
,8CD。ÔçèéÈPì+QRC]ªPínQLMãîPÃáþ<_。H¼|û
¼, h[:ïÅQðß©åPß éñ«a¹, Pn¶a¹òj COMSOLMultiphysics _`Mÿz.NO。.
ópôõÂlRS¼, ¼¶Âö÷1ÔçèéÈìPvßE·RS。ªÆÇÈ: Âøù!Í"
lvßP6Z!Í, ÂÓÃ¢Ý 1 RP 5 ú 23 ûçü{Àõ, "lvßP6Z7;; 6Z!Í
îPÀõçñÔçèéÈìP$zOÝý, ®¯b«+Ãßà²ÀèéÈìl 7.2cm; ¢ÀÔçèé
ÈìÝÂäåþÁ5Açúîä 0℃.Ý, 6¦,8CD。¢ßèéª7¨O 7.2cmPèé
ÈìÂõ:5AªPín。
CDE: ÂèéÈì; QRC]; ß éñ«; çÿ; _`ab
+
>FGHI:U452.1 2 JK<LM:A JNOI:1672643X(2024)02019209
Optimaldesignofthermalinsulationlayerthicknessinpermafrost
tunnelbasedonhydrothermalcouplingmodel
2
2
2
1
GUOShuodong,WANGXiaochuan,ZHANGYaoyang,CHENZemeng
(1.SchoolofCivilEngineering,HenanPolytechnicUniversity,Jiaozuo454000,China;
2.CCCC-SHECFourthHighwayEngineeringCo.,Ltd.,Luoyang471000,China)
Abstract:Tomaintainthesurroundingrockinafrozenstate,permafrosttunnelsoftenincorporateanin
sulationlayerwithinthetunnelliningstructuretopreventfreeze-thawdamage.Thethicknessofthein
sulationlayerisacriticalparameteraffectingthestabilityandeconomicviabilityofpermafrosttunnel
structures.Addressingthisconcern,wedevelopedahydrothermalcouplingmodelthattakesseepageand
ice-waterphasetransitionintoaccout.ThismodelwasintegratedintoCOMSOLMultiphysicsforpracti
calapplication.FocusingonatunnellocatedinQinghaiProvince ,weconductedanoptimizationstudyof
theinsulationlayerthicknessatthetunnelentrancesection.Thefindingsrevealedthatthetunnelarch
positionwasidentifiedastheunfavorablepositionfortheoptimizationdesign,andthehighesttemperature
withinthetunnelexcavationoccurredonMay23ofthefirstyear ,whichwasdeemedunfavorableforthe
optimizationdesign.Moreover ,thehighesttemperatureattheunfavorablepositiondecreasedwiththein
creaseoftheinsulationlayerthickness ,andthroughafittingformula,theoptimalinsulationlayerthick
nesswascalculatedtobe7.2cm.Underthisoptimalthickness,thetemperatureofthesurroundingrock
behindthetunnelliningcanremainbelow0℃,effectivelypreventingfreeze-thawdamage.Inthede
signofthetunnel’sinsulationstructure,aninsulationlayerthicknessof7.2cmcanenhancethestability
ofthesurroundingrocktunnelstructure.
Keywords:tunnelinsulationlayerthickness;permafrost;hydrothermalcouplingmodel;temperature
field ;numericalsimulation
!"#$:20230802; %$:20231121
'()*: ÿ+ÖÖþ,×¼(22020417)
+,-.: Ø\º(1997—), X, Ù[ÚÛ3, \5RS8, RScÙlA]jµÝLM。