Numerical Simulation of Drainage Process for Sand Cushion in Saturated Asphalt Pavement

Electronic journal of geotechnical engineering

Liu Jianjun1, 2¹  Yue Jiannan² 

[1] Professor1: School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu, China2: State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation (Southwest Petroleum University), Chengdu, China;Postgraduate in Geotechnical EngineeringSchool of Civil Engineering and Architecture, Southwest Petroleum University Chengdu, China

关键词: Saturated asphalt pavement;    sand cushion;    fluid-solid coupling;    numerical simulation;   

DOI  :  

来源: Oklahoma State University

【 摘 要 】

Drainagehasimportantinfluenceforlong-termstabilityandservicelifeofthepavement.Withalotofresearches,itisfoundthatthedamageofpavementstructureisexacerbatedwithrainfallorgroundwaterflowingintothepavementandarepeatedtrafficload.Pavementstructureisdividedintosurfacecourse,baseandcushion.Cushionhasgooddrainagepropertiesandisconducivetothedischargeofthefreewaterinsidethepavementstructure.Inthispaper,thefluid-solidcouplingmathematicalmodelundertheconditionofsaturationhasbeenbuiltbasedontheeffectivestressprinciple,DarcylawandtheBiottheory.Athree-dimensionalnumericalmodelhasbeenestablishedwiththefiniteelementsoftwareABAQUS.Withthecalculationofdrainageconsolidationprocessofsaturatedsandcushionunderrollingload,itcanprovidereferenceforengineering.Thecalculationresultsshowthatthedrainagetimeandthedrainageeffectareinfluencedbyrollingloadandvoidratio.Therateofchangeoftheporepressureandvoidratioisdifferentinthecentralandtheedgeoftheroad.Theporepressuredistributionandvoidratioarebandedandsymmetrical.

【 授权许可】

Unknown