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一次成坪轻型屋顶绿化工艺体系(英文) Introduction Withthecontinuousdevelopmentofurbanizationandtherapidexpansionofurbanconstruction,theproblemofurbanecologicalenvironmenthasbecomeincreasinglyprominent.Asanimportantcomponentoftheurbanecologicalenvironment,roofgreeninghasgraduallyattractedpeople'sattention.Roofgreeningnotonlyplaysaroleinbeautifyingtheurbanenvironmentbutalsohasimportantecologicalandenvironmentalbenefits,suchasimprovingairquality,reducingnoise,regulatingtheurbanmicroclimate,andconservingenergy.Thispaperwillintroducealightweightroofgreeningtechnologysystemusedforaonce-builtgreenroofconstructionproject,whichcanachievethesustainableutilizationofurbanspaceandresources. OverviewofLightweightRoofGreeningTechnologySystem Thelightweightroofgreeningtechnologysystemisanintegratedtechnologythatcombinesgreenspacedesign,structuralengineering,andenvironmentalprotectionmeasures.Itincludessixkeycomponents:theroofinglayer,drainagelayer,filtrationlayer,irrigationandfertilizationsystem,plantingsubstrate,andplantinglayer.Eachcomponentcontributestotheoveralleffectivenessofthesystembyprovidingaspecificfunction.Thefollowingwillintroducethesixlayersofthelightweightroofgreeningtechnologysystemindetail. RoofingLayer Theroofinglayeristhefirstlayeroftheroofgreeningsystem,whichservesasthefoundationfortheentireprojectandprovidesasecureandstablebasefortheoverlyinglayers.Theroofinglayerismadeoflightweight,waterproofanddurablematerials,suchasroofingmembranesmadeofPVC,EPDM,orTPO.Theroofingmaterialshouldbeabletoresistultravioletradiation,weathering,andchemicalcorrosion,andatthesametimehavegoodpunctureresistanceandflexibilitytoadapttoroofdeformation. DrainageLayer Thefunctionofthedrainagelayeristoensureproperdrainageandpreventwateraccumulationontherooftop.Thedrainagelayerusuallyconsistsofaplasticsheetwithperforations,geotextile,orgravel.Thedrainagelayernotonlyhelpstoremoveexcesswatertopreventplantrotbutalsofacilitatesthepenetrationofwaterandnutrientsintotheplantingsubstrates. FiltrationLayer Thefiltrationl