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1、盐渍土论文：盐渍土盐分聚集带路基土力学性质有限元模拟路基稳定性【中文摘要】盐渍土作为一种特殊土具有独特的土壤微观结构和工程特性，易引发公路工程病害如道路沉降、路基溶陷、冻胀等。黄泛区盐渍土分布广泛，盐渍化程度高，路基填土易受地基中盐分及地下含盐水毛细作用的影响。因此，黄泛区盐渍土地区地基、路基聚盐规律，探索合理的工程处治措施，对论证路基在运营中的稳定性至关重要。本文依托滨德高速公路工程，针对山东黄泛区土质、盐渍土分布情况、地质水文条件，进行了实地调研勘测和取样分析；通过竖管实验、路基模型实验，分析盐渍土地区
2、地下矿化水和含盐地基对路基土的影响，探究了水分在路基土中的运动和分布规律、盐分随毛细水在路基中的聚集位置和聚盐程度,得出了路基土受地下水毛细作用后的水分、盐分分布图。通过有限元模拟计算边坡稳定系数及路基沉降，分析了经盐渍化作用路基土性质改变后路基整体受力、位移状况及稳定性。依据上述研究及对已建工程的调查，提出了针对黄泛区盐渍土地区路基填筑的工程处治措施。【英文摘要】Saltysoil,asaspecialsoilwithuniquemicrostructureandengineeringproperties
3、,easilyresultsinthedamageofhighwaypavement,suchasRoadsurfacesubsidenee,pavementpumping,subgradedissolvetrapped,Frostheaving,etc.Saltysoilisgenerallynotusedassubgradefilledinhighwayengineering,butevenwiththequalifiedsoilsubgrade,subgradesoilsecondarysaliniz
4、ationisalsoeasilyhappenedinsaltysoildistributionareabecauseoftheinfluenceofsaltinsaltysoilfoundationandingroundwater.Therefore,thestudyofinfluenceofsaltysoilfoundationtohighwaysubgradeisveryimportant・Thethesisisbasedontheoilnatureoffloodarea,saltysoildistr
5、ibution,geologicalandhydrologicalconditionsinShandongprovince,simulatingtheinfluenceoffoundationwhatwithundergroundmineralizedwaterinsaltysoi1areaandsaliferousfoundationbytheexperimentsofstandpipeandsubgrademodelexperiments・Researchthemovementanddistributi
6、onofsaltwaterinthesubgradesoilandthesalinitycollectivepositionandqualityalongwiththeslenderwaterinthefoundation.Throughtheresearch,wewouldgetthemoistureandsalinitycollectivedistributionchartcausedbytheinfluenceoffoundationbyslenderwatereffect.Thoughtheexpe
7、riments,thispaperexplorestheinfluenceofsaltcontentonthepropertiesofsubgradesoilsaftersaltaccumulation,includingtheinfluencelawofsoilCBR,1iquidandplastic1imits,shearstrengthandcompressionproperties・Bythefiniteelementsimulationmethod,thispapera.nalyzesthevar
8、ietyoftheroadbedoverallforce,displacementandstabilitywhenthenatureofsubgradesoilsalinitychanged.Sumupthesestudiesandtheexistingexperieneeinengineering,thispaperputforwardsthemeasuresofsubgradefillinginsaltyso
