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:1672643X(2024)05014807
                Fracturemechanicsmodelforfrostheaveinducedcrackingoftrapezoidal
                         canallininginfrozensoilareawithhighgroundwatertable

                                            1,2
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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,afrostheavingfracturemechanicsmodelfor
                 concreteliningoftrapezoidcanalsinfrozensoilareaswithhighgroundwatertableisdevelopedbyintegra
                 tingtheanalysismethodoffrostheavingmechanicswiththetheoryoflinearelasticfracturemechanics.
                 Theproposedmodelreducesthecomplexprocessofinitialcrackpropagationandfracturefailureofthe
                 liningstructuretoasimplifiedtypeIfracturemechanicsproblem ,soastoobtainadeterminationmethod
                 forstressintensityfactorandvulnerablesections.TakingacanalinTarimIrrigationDistrictasanexam
                 ple ,theeffectsofdifferentgroundwaterdepthwonthedistributionofstressintensityfactorK (x)and
                                                                                               F Ⅰ
                 reasonableliningplatethickness doftheliningsectionswereanalyzed.Theresultsshowthatthemagni
                                             r
                 tudeofstressintensityfactorissignificantlyinfluencedbygroundwaterrechargeconditions.Thedecrease

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