水土保持研究ResearchofSoilandWaterConservation利用瞬态剖面法测定宽级配砾石土水力参数试验研究胡凯"，陈晓清1中国科学院水利部成都山地灾害与环境研究所山地灾害与地表过程重点实验室，成都610041:2.中国科学院大学，北京100049)摘要：土一水特征曲线和渗透函数是土体渗流分析和稳定性研究的重要参数。基于瞬态剖面法原理，加工制作30cmX30cmX30cm(长X宽X高)正方体和30cmX60cm(W.径X高)的渗透柱，针对宽级配砾石土进行时域反射法标定试验和渗透柱试验。此渗透柱装置可以同时测定不同断面基质吸力和体积含水率变化，试验经进水饱和与排水蒸发阶段，得到宽级配砾石土体积含水率与基质吸力的关系，并根据瞬态剖面法得到非饱和渗透系数随基质吸力的变化关系；同口寸，采用vanGenuchten和Brooks-Corey土一水特征曲线模型和渗透系数函数对其进行分析。结果表明：该渗透柱适用于宽级配砾石土水力参数测定；vanGenuchten和Brooks-Corey土一水特征曲线模型都能很好地描述宽级配砾石土土一水特征曲线；Brooks-Corey渗透系数函数在描述宽级配砾石土渗透系数与基质吸力关系要优于vanGenuchten渗透系数函数。这种试验方法为宽级配砾石土水力参数的测定提供了参考。关键词：宽级配砾石土；时■域反射法；瞬态剖面法；土一水特征曲线；渗透系数函数中图分类号:TU411.4文献标识码：A文章编号：1005-3409S019)04-0343-06DOI:10.13869/j.cnki.rswc.2019.04.051LaboratoryInvestigationofHydraulicParameterofWide-GradingGravellySoilbyUsingInstantaneousProfileMethodHUKaF'2，CHENXiaoqing2(.KeyLaboratoryofMountainHazaOart)SurfaceProcesses»InstituteofMountainHazaif、anDEnvironment，ChineseAcaEtemyofSciences»ChengDu610041，China?2.UniversityofChineseAcaLtemyofSciences»Beijing100049，China)Abstract：Thesoil-watercharacteristiccurveandpermeabilityfunctionareimportantparametersforsoilseepageandstabilityanalysis.Inordertoinvestigatethehydraulicparametersofwide-gradinggravellysoil，a30cmX30cmX30cmlengthXwidthXheight)cubeand30cmX60cmdiameterXheight)infiltrationcolumnwasfabricatedforthecalibrationtestandinfiltrationcolumntestofwide-gradinggravellysoil.Theinfiltrationcolumnapparatusallowsthemeasurementofbothvolumetricwatercontentandmatricsuctionatvarious1evels.Theinfiltrationcolumntestwasdividedintothreestages：saturation,drainage,andevapora-tion.Andconsequently>therelationshipbetweenvolumetricwatercontentandmatricsuctionofwide-grad-inggravellysoi1wasobtained.Meanwhile,theinstantaneousprofilemethodwasgenerallyappliedtodetei^minetherelationshipbetweenunsaturatedpermeabilityandmatricsuction.Moreover，thevanGenuchtenandBrooks-Coreyequationsandpermeabilityfunctionswereusedtofitthetestresults.Theinfiltrationcolumnapparatushadbeenprovedtobesuitableforthedeterminationofsoil-watercharacteristicscurvesofwide-gradinggravellysoi1.ThevanGenuchtenandBrooks-Coreymodelcanaccuratelydescribethesoil-watercharacteristicscurves.TheBrooks-CoreypermeabilitycoefficientfunctionwassuperiortothevanGenuchtenpermeabilitycoefficientfunctionintermsofdescribingtherelationshipbetweenthepermeabilitycoefficientandmatricsuctionofwide-gradinggravellysoil.Thisresearchwillprovidethemethodformeasuringhydrau-lieparametersofwide-gradinggravellysoil.Keywords：wide-gradinggravellysoil;timedomainreflectometry；instantaneousprofilemethod;soil-watercharacteristicscurve;permeabilitycoefficientfunction2收稿日期：2018-08-29修回日期：2018-09-23资助项目：中科院STS重点项目fcFJ-STS-ZDTP-015):国家自然科学基金4161101144)第一作者：胡凯a988-),男，江西新余人，博士研究生，研究方向为地质灾害防治与机理。E-mail：khul5@imde.ac.cn通信作者：陈晓清《974—),男，四川遂宁...