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Effectofcombinedflatandverticalrenovationofurbanroadgullieson
surfacewaterfloodingpreventionbasedonphysicalmodelexperiments
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YUSen,ZHANGShuhan,DISuchuang,ZHOUXing,GEJun,XIAOBingqi
(1.BeijingWaterScienceandTechnologyInstitute,Beijing 100048,China;2.HohaiUniversity,Nanjing 210036,China)
Abstract:Theroadgullyisanimportantcomponentoftheurbandrainagesystem,itsdischargecapacitydirectly
affectsthedegreeofwateraccumulationonurbanroadsurface.Thecity ’s230,000raingrateswillberenovated
throughthecombinationofhorizontalandverticalduringthe14thFive - YearPlanperiodinBeijing.Inorderto
guaranteetheeffectofgullyreformation ,thephysicalmodeltestofflatgrategullyrainwaterinletandtheflat -
standingcombinedgullywascarriedout.Through377workingconditiontests ,theinfluencesoffactors(suchas
whethertherainwaterintakessink3cmmorethanthesurroundinggroundaccordingtothestandardrequirements,
theformofraingrate,thedegreeofblockageofraingrate,thedegreeofblockageofrainpipeandthetypicalwa
terdepthofroad )onthewatercollectingrateanddrainagecapacityofrainwaterintakesarestudied.Theresults
showthat :① Whetherthegratesurfaceelevationissunkby3cmasstandardhadagreaterimpactonthesurface
waterfloodingoftheroad. ② Differentgrateformshavelittleeffectonthewatercollectioncapacityofsunkenrain
waterinlets. ③ Theoverflowcapacityofrainwaterinletafteracertaindepthofroadsurfacewaterfloodingisdeter
minedbytheconnectionpipeoverflowcapacity. ④ Theformofgullyhasasignificanteffectonthedrainagecapaci
tywhenthegrateisclogged. ⑤ Theanti - cloggingabilityoftheflat - standingcombinedgullyissignificantlybetter
thanthatoftheflattypegully.Basedontheexperimentalresults,somesuggestionsareproposedtoreduceandcon
trolsurfacewaterfloodingthroughthecombinationofgullylevelandelevation.Thisresultcanprovidetheoreticalref
erenceandtechnicalsupportforthedesign ,constructionandmodificationofroadstormwaterdrainagesystems.
Keywords:urbanroad;gully;raingrate;horizontalandverticalcombinationoftransformation;surfacewater
flooding ;modelexperiment
(责任编辑:李福田)
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