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1、石油污染土的击实特性＊基金项目：中国海洋大学本科生研究训练计划资助项目；国家自然科学基金项目(40872150)作者简介：郑天元(1979～)，男，中国海洋大学，本科，汉，河南，E-mail:woshizty@yahoo.cn通讯联系人：杨俊杰，E-mail:jjyang@ouc.edu.cn，Tel:0532-66781773＊郑天元1，杨俊杰1，童玲2，刘江娇1，郑西来1(1.中国海洋大学海洋环境与生态教育部重点实验室，青岛266100;2.华北水利水电学院环境与市政工程学院，郑州450011)摘要：为了解石油污染对土的压实特性的影
2、响，利用室内击实试验，以原油、柴油和水为介质，得到了单一液体介质和油水混合介质时土的击实曲线。发现石油代替水作为壤粘土孔隙流体，其击实曲线无明显峰值，干密度随含油率增加略有增大但远小于无污染土的最大干密度。油水混合作为孔隙流体，随含油率的增加，原油污染土壤的击实曲线由钟型、双峰型转向无明显峰值曲线，出现类似高液限粘土压实特性；柴油污染土的击实曲线由尖锐型转变为无峰值型；最优含水率均减小，最大干密度随含油率变化规律与油品性质有关。提出了“油膜润滑”的新观点，可较好的解释石油污染壤粘土击实曲线的变化规律。关键词：石油污染；壤粘土；干密度；最
3、优含水率中图分类号：文章编号：收稿日期：CompactionPropertyofOilContaminatedSoilZHENGTian-yuan1,TONGLing2,YANGJun-jie1,LIUJiang-jiao1,ZHENGXi-lai1(1.KeyLaboratoryofOceanEnvironmentandEcology,MinistryofEducation,OceanUniversityofChina,Qingdao266100,China;2.InstituteofEnvironmentalandMunicipal
4、Engineering,NorthChinaUniversityofWaterConservancyandElectricPower,Zhengzhou450011,China)Abstract:Influenceofoilcontaminantoncompactionpropertiesofsoilareanalyzed.Standardcompactiontestonloamclaywithsingleliquidmediumsuchascrudeoil,diesel,waterandoil-watermixmediumwerepe
5、rformed.Whenpetroleumreplaceswaterasholefluid,thecompactioncurveshavenoobviouspeakvalue,anditsdrydensityincreasesslightlyalongwiththeincreasingofoilconcent,evenit’sfarlessthanthemaximumdrydensityofsoilwithoutoilpollution.Addingwatertotheoilcontaminatedsoil,withtheincreas
6、ingofoilconcents,itwasshownthatthecompactioncurvesofcrudeoilcontaminatedsoilvaryfromshapedcurvetobimodalcurve,andthentocurvewithoutobviouspeak.Thecompactionpropertyofcrudeoilcontaminatedsoilissimilartowhichofhighliquidlimitclay.Whilefordieseloilcontaminatedsoil,thepeakof
7、compactioncurvesturnedsharpwhendieselconcentreached2%,thenthesametrendwiththecrudeoilcontaminatedsoil’s.Bothoptimummoisturecontentreduce,however,themaximumdrydensityfluctuategreatlydependinguponthedifferentcharacterofoil.Therefore,thenewviewpoint-“oilfilmlubrication”prov
8、idedareasonableexplanationonthechangeofcompactioncurves.Keyword:oilcontamination;loamclay;drydensity;op
