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ID:40718819
大小:508.51 KB
页数:11页
时间:2019-08-06
《Improved Boussinesq Equation–Based Model for》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、11ImprovedBoussinesqEquation–BasedModelfor2TransientFlowinaDrainageLayerofHighway:32CapillaryCorrectionY12344Han-ChengDan;PeiXin;LingLi;andLiangLi5Abstract:Currently,timetodrainanddepthofflowarethetwobasicconceptsfordesigningthedrainagelayerofhighway,bothofwhichL63arebase
2、donthesaturatedflowandcannotreasonablyevaluatethedrainageefficiencyofdrainagelayer.Arecentstudydemonstratedthat7capillaryeffectscouldbecomesignificantwithunsaturatedflowplayinganimportantroleinconductingwateroutofthedrainagelayerin8somecases.Inviewofthedisadvantagesofthet
3、womethods,itisreasonabletocombinethemtoguidethedesignofadrainagelayer.Here,a9modelwasestablishedbasedontheone-dimensional(1D)transientBoussinesqequationwithacapillarycorrection.Thegeneralsolutionto10thegoverningequationwasobtainedusingthemethodofseparationvariables.Furthe
4、rmore,thepresentedmodelwasvalidatedagainst11numericalsimulationspredictedbyafinite-differencemethod(theMATLABprogram)andthefinite-elementmethod(SUTRAprogram).12Acomparisonwasconductedtodemonstratethedifferencebetweenthesaturateddrainageandunsaturateddrainageprocesses.Ther
5、esults13showedthatthetimetodrainthesamewatervolumebasedonthesaturatedmodelismuchlessthanthatbasedontheunsaturated14model.Thepresentmodelwithcapillarycorrectionperformsbetterthanthesaturatedmodelinpredictingtimetodraininthedrainage15layer.DOI:10.1061/(ASCE)IR.1943-4774.000
6、0642.©2013AmericanSocietyofCivilEngineers.ON16CEDatabasesubjectheadings:Highwaysandroads;Drainage;Unsaturatedflow.17Authorkeywords:Highway;Drainageengineering;Drainagelayer;Time-to-drain;Depth-of-flow;Unsaturatedflow.18Introductionbasedonsaturatedflow.Thefirstapproach(tim
7、etodrain)forde-34signingthedrainagelayer,proposedbyCasagrandeandShannon3519Pavementdrainagesystemsarefrequentlyusedinmanycountries,F(1952),istoselectaspecifictimetoobtainaspecifieddegreeof3620e.g.,China,Europe,andtheUnitedStates(Rabab’an2007).Inthedrainageforaninitiallysa
8、turateddrainagelayer.Solutionsbased3721drainedsection,adrainagelayerconnectedtoablindditch(Fig.1
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