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Studyonthestress - deformationcharacteristicsofwater -andair - filled
double - layerinflatablerubberdams
2,3
1
1,2,3
2,3
2,3
GAOXin ,WANGTianliang ,ZHOUZhengguo ,DUYang ,GUOWei
(1.SchoolofCivilEngineering,TianjinUniversity,Tianjin 300354,China;
2.ChinaConstructionSixthEngineeringBureauHydropowerConstructionCo.,Ltd.,Tianjin 300350,China;
3.InstituteofEngineeringTechnology,ChinaConstructionSixthEngineeringBureauCo.,Ltd.,Tianjin 300171,China)
Abstract:Rubberdamismostlyusedforimpoundinginexistingurbanriversandchannels,whichisagreen,low -
carbonandeconomicalflexiblecylindricalstructures.Restrictedbythedevelopmentofmaterialtechnologyand
manufacturingprocess,theexistingrubberdamsretainingwaterlevelislow,highrubberdam constructionwill
facetheoverallinvestmentinhighandlaggingtechnologyandotherissues.Thewater -andair - filleddouble - layer
rubberdamwasproposed.Astructure - fluidmechanicsmodeloftheproposeddamisestablishedbasedonthefinite
differencemethod.Theaccuracyoftheproposedmethodwasverifiedbythelargescalemodeltest.Parametric
studieswerecarriedouttoidentifytheeffectsoftheupstream waterlevel ,internalairpressureandwaterhead,
anchoragedistanceandtheperimeterratioonthedeformationcharacteristicsandtensileforces.Theresultsshow
thatwiththeincreaseofupstreamwaterlevel,thedamheightincreasesfirstandthendecreases,thewidth,con
tactwidthandtensileforceincreasecontinuously ,andthecross - sectionalareasofthetwodamsdecreasecontinu
ously.Theoptimum perimeterratiois0.9,theoptimum airpressureis0.20 γ w L,theoptimum waterheadis
1
0.45 γ w L,theoptimumanchoragedistanceisD = 0.06L,andtheultimateexternalwaterlevelthatcanberesisted
1 1
=
undertheoptimumparametersisH cr 0.375L.Basedontheoptimumstructuralparameters,thedesignparameter
1
tableofthenewdamisobtained,whichcanbeusedforthedesignandcalculationoftheproposedrubberdam.
Keywords:hydraulicstructure;rubberdam;cross - sectionalshape;tensileforce;water - retainingcapacity
(责任编辑:韩 昆)
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