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1、STRUCTURALMECHANICSOFBURIEDPIPESReynoldKingWatkinsUtahStateUniversityLogan,UtahLorenRunarAndersonUtahStateUniversityLogan,UtahCRCPressBocaRatonLondonNewYorkWashington,D.C.©2000CRCPressLLC©2000CRCPressLLCGENERALNOTATIONGeometryA=crosssectionalwallareaperunitlengthofpipe,B=brea
2、dthofthetrenchD=pipe(tank)diameter,H=heightofsoilcover,h=heightofwatertable,L=lengthoftankorpipesection,r=radiusofcurvatureofthepipe(tank)cylinder,R=radiusofabendinthepipe,t=thicknessofthewall,x=horizontalcoordinateaxis,y=verticalcoordinateaxis,z=longitudinalaxis(withexceptio
3、ns),b=angleofsoilshearplane.Forces,Pressures,andStressesP=externalpressureonthepipeortank,P'=internalpressure,p=vacuuminthepipeortank,Q=concentratedforce,W=surfacewheelload,g=unitweights,s=direct(normal)stress,t=shearingstress.Subscriptsrefertodirectionsofforcesandstresses.Pr
4、opertiesofMaterialsc=cohesionofsoil,E=modulusofelasticityofpipe(tank)material,S=allowablestress(strength)ofmaterial,g=unitweightofmaterial,n=Poissonratio,j=soilfrictionangle.©2000CRCPressLLCCONTENTSChapter1Introduction2PreliminaryRingDesign3RingDeformations4SoilMechanics5Pipe
5、Mechanics6RingStresses7RingDeflection8RingStiffness9Non-circularCrossSections10RingStability11EncasedFlexiblePipes12RigidPipes13MinimumSoilCover14LongitudinalMechanics15ThrustRestraints16Embedment17ParallelPipesandTrenches18SpecialSections19StressAnalysis20PlasticPipes21Exter
6、nalHydrostatics22BuriedTanksandSilos23Flotation24LeaksinBuriedPipesandTanks25Long-SpanStructures26Non-circularLiningsandCoatings27Risers28AnalysisofBuriedStructuresbytheFiniteElementMethod29ApplicationofFiniteElementAnalysistoaBuriedPipe30EconomicsofBuriedPipesandTanksAppendi
7、xA:Castigliano'sEquationAppendixB:ReconciliationofFormulasforPredictingRingDeflectionAppendixC:SimilitudeAppendixD:HistoricalSketchAppendixE:StressAnalysisAppendixF:StrainEnergyAnalysis©2000CRCPressLLCPREFACEBuriedpipesareanimportantmediumoftransportation.Onlyopenchannelsarel
8、esscostlytoconstruct.Ontheaverage,pipelinestransportover500ton-miles
