简介：AdeuteronpossessesacoulombpotentialbarrierwithmaximumUmax≈10^6eV(atro=1.51×10^-13cm)aroundhim.Soprerequisitetodirectcollideandexcitenuclearfusionreactionfortwodeuteronsistopenetratetoallofoppositebarrier.

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简介：Asaspecialgeologicalphenomenon,thecharacterofcollapsibleloessfoundationiscollapsiblewhenpenetratedbywater.Thischaracterleadstothesoillosingloadbearingcapacitylargelyandmayleadtofoundationfailure.Pileisapopularfoundationusedincollapsibleloess.Thesqueezedbranchandplatepileisanewtypeofpiledevelopedinrecentyearsandhasnotbeusedinaprojectbefore.Inthispaperthreesqueezedbranchandplatepilesaretestedincollapsibleloessafterimmersionprocessing.Theresultsmaybeusedforreferenceinsimilarconstructionproject,andtoprovidetheoreticalreferencesforde-signingofthesqueezedbranchandplatepilesinengineeringpractice.

简介：AnumberofdrybridgeshavebeenbuilttosubstitutefortheroadbedontheQinghai-TibetRailway,China.Theaimofthisstudywastoinvestigatetheexothermicprocessofcast-in-place(CIP)pilefoundationofadrybridgeanditsharmtothestabilityofnearbyfrozenground.Wepresent3Dheatconductionfunctionsofaconcretepileandoffrozengroundwithrelatedboundaries.Ouranalysisisbasedonthetheoryofheatconductionandtheexponentlawdescribingtheadiabatictemperaturerisecausedbyhydrationheat.ResultsundercontinuousandinitialconditionswerecombinedtoestablishafiniteelementmodelofaCIPpile-frozengroundsystemforadrybridgeunderactualfieldconditionsincoldregions.NumericalresultsindicatedthattheprocesscouldeffectivelysimulatetheexothermicprocessofCIPpilefoundation.ThermaldisturbancetofrozengroundunderalongdrybridgecausedbythecastingtemperatureandhydrationheatofCIPpileswassubstantialandlong-lasting.Thesimulatedthermalanalysisresultsagreedwithfieldmeasurementsandsomesignificantrulesrelatingtotheproblemwerededucedandconclusionsreached.