Page 71 - 2024年第55卷第6期
P. 71
andPavementDesign,2015,16(1):200 - 213.
[26] GASKINSFH,BRODNYANJG,PHILIPPOFFW,etal.TherheologyofasphaltIIL:Flowcharacteristicsof
asphalt[J].TransactionsoftheSocietyofRheology,1960,4(1):265 - 278.
[27] 褚福永,朱俊高,殷建华.基于大三轴试验的粗粒土剪胀性研究[J].岩土力学,2013,34(8):2249 - 2254.
[28] PIRESDM,SCHUSTERSL,SPECHTLP,etal.Studyofthepermanentdeformationofasphaltmixturesinthe
field:Amultiscaleapproach[J].ConstructionandBuildingMaterials,2022,325:126763.
[29] 王晓玲,李克,张宗亮,等.耦合 ALO - LSTM 和特征注意力机制的土石坝渗压预测模型 [J].水利学报,
2022,53(4):403 - 412.
[30] 余红玲,王晓玲,任炳昱,等.土石坝渗流性态分析的 IAO - XGBoost集成学习模型与预测结果解释 [J].
水利学报,2023,54(10):1195 - 1209.
[31] HUANGJ,ZHANGJ,LIX,etal.Investigatingtheeffectsofensembleandweightoptimizationapproacheson
neuralnetworks’performancetoestimatethedynamicmodulusofasphaltconcrete[J].RoadMaterialsandPave
mentDesign ,2023,24(8):1939 - 1959.
[32] LIZ,ZHANGJ,LIUT,etal.UsingPSO - SVRalgorithm topredictasphaltpavementperformance[J].Journal
ofPerformanceofConstructedFacilities ,2021,35(6):04021094.
[33] DANESHVARD,BEHNOODA.Estimationofthedynamicmodulusofasphaltconcretesusingrandom forestsal
gorithm [J].InternationalJournalofPavementEngineering,2022,23(2):250 - 260.
[34] TAOR,TAM CM.System reliabilityoptimizationmodelforconstructionprojectsviasystemreliabilitytheory[J].
AutomationinConstruction ,2012,22:340 - 347.
Permeabilitystudyofasphaltconcreteincorewallundershearlargedeformationconditions
1,2,3
1,2
HEJianxin 1,2,3 ,LIHao ,YANGWu 1,2,3 ,LIULiang
(1.CollegeofHydraulicandCivilEngineering,XinjiangAgriculturalUniversity,Urumqi 830052,China;
2.XinjiangKeyLaboratoryofHydraulicEngineeringSecurityandWaterDisasterPrevention,Urumqi 830052,China;
3.CorpsKeyLaboratoryofSafetyandDisasterPreventionofEmbankmentEngineering,Urumqi 830052,China)
Abstract:Inordertostudythepermeabilitycharacteristicsofasphaltconcreteofheartwallunderlargeshearde
formationconditions ,basedonasetoftriaxialshearaxialseepagetestsystem developedindependently,triaxial
shearseepagetestswithdifferentcombinationsofperipheralandpermeationpressureswerecarriedoutonasphalt
concreteofNo.70andNo.110 ,andtheoptimalmodelforinversionofpermeabilitycoefficientofasphaltconcrete
wasproposedbasedontheglobaloptimizationalgorithm.Theresultsshowthat:(1)theshearexpansioneffect
causestheopeningandexpansionofcracks,whichincreasesthepermeabilitycoefficientsignificantly.Theaxial
strainoftwodifferentgradesofasphaltconcretereaches8% to30% underdifferentcircumferentialpressures ,and
theincreaseofpermeabilitycoefficientreache2to3ordersofmagnitude.(2)Thestrainstateandstrainincrement
affectthepermeabilityofasphaltconcrete,andthepermeabilitycoefficientchangeswiththestrainfield.Inthe
compactionstage ,withtheincreaseofaxialstrain,thevolumeincrementratioisnegativeandthepermeabilityco
efficientdecreases ;inthecrackdevelopmentstage,thevolumeincrementratioispositiveandthepermeabilityco
efficientincreases.(3)Perimeterpressurehasasignificanteffectonthepermeabilityofasphaltconcrete.The
axialstraincorrespondingtothetwogradesofasphaltconcretespecimensreachingtheimpermeabilitysafetythresh
oldissmallatlowperimeterpressure,andshowsanincreasingtrendwiththeincreaseofperimeterpressure.When
theperimeterpressurewasloadedto1.0MPaandtheaxialstrainincreasedto30%,theimpermeabilitycoefficient
ofasphaltconcretestilldidnotexceedtheimpermeabilitysafetythreshold.
Keywords:hydraulicasphaltconcrete;largesheardeformation;permeabilitycharacteristics;axialstrain;in
versionmodel
(责任编辑:韩 昆)
— 6 9 7 —