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                             Researchandperformanceverificationofhigh - pressurewaterway
                                       reinforcedconcretesandwichsteelplatelining
                                                                         1
                                                                                                     1
                                                1
                               1
                                                                                         1
                                                              2
                   PEIJiangrong,WANGXiaogang,WEIXiaoling,LIUHeyi,CHENTiannan,LIULipeng
                           (1.ChinaInstituteofWaterResourcesandHydropowerResearch,StateKeyLaboratoryofSimulationand
                                       RegulationofWaterCycleinRiverBasin,Beijing 100038,China;
                                   2.SichuanHuanengLudingHydropowerCo.,Ltd.,Chengdu 610072,China)
                  Abstract:Toaddresstheissuesofwaterseepageandsusceptibilitytobucklinginsteelplateliningsofhigh - pres
                  surewaterways ,anovelreinforcedconcretesandwichsteelplatelininghasbeendevised.Thislining,primarily
                  comprisinganinnerlayerofreinforcedconcrete ,asteelplate,andanouterlayerofreinforcedconcrete,aimsto
                  enhancestructuralintegrity.Performancevalidationinvolvedamodeltestunderalternatinghighinternalandexter
                  nalwaterpressurestoexaminedeformationstressesandload - sharingvariations.Theresultsrevealedthatunderex
                  ternalpressure ,theliningmaintainsacompressedstatewitharelativelyconstantloaddistributionamongitscom
                  ponents.Thesteelplateexperiencedacompressivestressofonly1.47MPa ,whichissignificantlylowerthanthe
                  criticalstressof20.25MPa ,indicatingaminimalriskofinstabilityorbuckling.Underinternalpressure,thelin
                  ingissubjecttotension,withtheinnerconcretelayerpronetocrackingbeforetheouterlayer.Priortocrackfor
                  mation,theload - sharingremainsessentiallyunchanged.Aftercracking,theloadbornebytheconcretedecreases
                  andthatbornebythesteelplateandthesurroundingrockincreases.Despitethis,thesteelplate'stensilestress
                  doesnotexceed28.01MPa ,whichisfarlowerthanitsultimatetensilestrength.Relativetoconventionallinings,
                  thisinnovativestructuralsolutiondemonstratesenhancedperformanceinmanagingthedemandsofhigh - pressurea
                  quaticenvironments.
                  Keywords:reinforcedconcrete;sandwichsteelplatelining;internalandexternalwaterpressure;loadsharingratio

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