Page 152 - 《水资源与水工程学报》2024年第5期
P. 152
!35 "!5 # & ' ( ) & * + , - Vol.35No.5
2024 $ 10 % JournalofWaterResources&WaterEngineering Oct.,2024
DOI:10.11705/j.issn.1672-643X.2024.05.18
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MNFOP:S277;TV67 QRSTU:A QVWP:1672643X(2024)05014807
Fracturemechanicsmodelforfrostheaveinducedcrackingoftrapezoidal
canallininginfrozensoilareawithhighgroundwatertable
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WULang ,XIAOMin ,XIChen ,CUIHao ,YANGXiaosong,GEJianrui
(1.SchoolofCivilEngineering,JiangxiScience&TechnologyNormalUniversity,Nanchang330013,China;2.DisasterPrevention
andMitigationEngineeringTechnologyResearchBaseofJiangxiAssociationforScienceandTechnologyThinkTank,Nanchang
330013,China;3.CollegeofHydraulicandArchitecturalEngineering,TarimUniversity,Alaer843300,China;
4.CollegeofEnergyandPowerEngineering,LanzhouUniversityofTechnology,Lanzhou730050,China.)
Abstract:Thegenerationandpropagationofinitialcracksinducedbyfrostheaveloadsresultinthefrac
tureofliningstructures,whichisaprimaryfactorcontributingtotheoccurrenceoffrostheavedamagein
canalslocatedincoldregions.Basedonexistingresearch,afrostheavingfracturemechanicsmodelfor
concreteliningoftrapezoidcanalsinfrozensoilareaswithhighgroundwatertableisdevelopedbyintegra
tingtheanalysismethodoffrostheavingmechanicswiththetheoryoflinearelasticfracturemechanics.
Theproposedmodelreducesthecomplexprocessofinitialcrackpropagationandfracturefailureofthe
liningstructuretoasimplifiedtypeIfracturemechanicsproblem ,soastoobtainadeterminationmethod
forstressintensityfactorandvulnerablesections.TakingacanalinTarimIrrigationDistrictasanexam
ple ,theeffectsofdifferentgroundwaterdepthwonthedistributionofstressintensityfactorK (x)and
F Ⅰ
reasonableliningplatethickness doftheliningsectionswereanalyzed.Theresultsshowthatthemagni
r
tudeofstressintensityfactorissignificantlyinfluencedbygroundwaterrechargeconditions.Thedecrease
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