水位变化对路基影响的试验与仿真分析研究

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中图分类号：TU476.4 文献标识码：A DOI：10.7535/hbkd. 2026yx02003

Abstract：Toaddressthe limitation thatcurrent studieson subgrade sepage stabilityoften simplify filsas homogeneous materials，tisresearchinvestigatedtheeffectofanisotropyinprmeabilitybyconsideringhorzontalandverticalcoficints. Firstlylaboratorytstswereoductedtoexanetevratiooforzontalandverticalpermeabilitoefentsofillswith drydensity.Subsequently，fieldtests werecarredouttoanalyzethehydraulicresponsecharacteristicsofriver-sidesubgrade underfluctuating waterlevels.Finally，numericalsimulationswereperformedtodiscusstheinfluenceofpermeability coeficientanisotropyonsubgradestabilityTheresultsindicatethattheratioofhorizontaltoverticalpermeabilitycoeficients ofillisloselycorelatedwithdrydensityDuringtheinitialstagesofwaterleveldeine，signiicantchangesinvolumetric water contentandpore waterpresureare observedat monitoring pointswithin thesubgrade.Neglectingpermeability coeficientanisotropymayleadtoanunderestimationof subgradeinstabilityrisksunderdeclining water levelconditions. Furthermore，higherratesof water levelchangecoupledwith more pronounced permeabilitycoeficientanisotropy inthefil correspodtolowersafety factorsofthe subgrade.Thestudyresultcan enhance therationalityofthe subgrade stabilitydesign under water level changeconditions，which provides valuable insights forthe designofroad subgrades inflod detentionand retention areas.

Keywords： subgrade engineering；seepage； permeability coefficient； field test； numerical simulation

蓄、滞洪区内路基因水位变动导致服役性能下降，出现了大量垮塌事件[1-4]。（剩余9710字）