Page 62 - 2024年第55卷第4期
P. 62
[21] LINK,TAKAHASHIA.Experimentalinvestigationsonsuffusioncharacteristicsanditsmechanicalconsequences
onsaturatedcohesionlesssoil [J].Soils& Foundations,2014,54(4):713 - 730.
[22] CIVIDINIA,BONOMIS,VIGNATIGC,etal.Seepage - inducederosioningranularsoilandconsequentsettle
ments[J].InternationalJournalofGeomechanics,2009,9(4):187 - 194.
[23] PACHIDEH V,HOSSEINIS.Anewphysicalmodelforstudyingflowdirectionandotherinfluencingparameterson
theinternalerosionofsoils[J].GeotechnicalTestingJournal,2019,42(6):20170301.
[24] 中华人民共和国国家发展和改革委员会.水电水利工程粗粒土试验规程:DL?T5356—2006[S].北京:中
国电力出版社,2006.
[25] 殷殷,刘盈斐,吴永 康, 等.堆 石 料 湿 化 试 验 变 形 过 程 分 析 [J].水 利 学 报,2022,53(11):1361 -
1368 ,1382.
Experimentalstudyontheeffectoffineparticlelosspromoting
thewettingdeformationofrockfills
3
4
1,2
1,2
5
WANGGang ,RENHengxuan ,JINWei,LEJianhua,HUANGHui
(1.KeyLaboratoryofNewTechnologyforConstructionofCitiesinMountainArea,Chongqing 400045,China;
2.SchoolofCivilEngineering,ChongqingUniversity,Chongqing 400044,China;
3.ChengduEngineeringCorporationLimited,PowerChina,Chengdu 610072,China;
4.SichuanCompanyofChinaHuadianCorporationLtd.,Chengdu 610095,China;
5.ChinaHuadianCorporationLtd.,Beijing 100031,China)
Abstract:Undersituationsoftheperiodicalwaterlevelfluctuations,thefineparticlesinrockfillsmightbewashed
out ,therebypromotingthewetting - inducedlong - term deformationofrockfills.Torevealthemechanism ofthe
largelong - termdeformationofarock - filldam ,aseriesofcomparativeoedometererosiontestswereconductedon
thesampleswithbothcontinuousanddiscontinuousparticlegradationsofthedam ’supstream rockfillundercon
stantandfluctuatingwaterlevelconditionsrespectively.Thehistoriesoftheaxialstrainandfineparticlelosswere
recordedunderdifferentconditions.Thecomparativetestresultsconfirmedthatthewaterlevelfluctuationcanlead
toconsiderableamountofparticlelossandthusaggravatethewettingdeformation,andtheinfluencingextentde
pendsontheparticlegradation ,surchargepressure,thefallingspeedofwaterlevelandinitialwatercontent.The
specimensofacontinuousgradationareinternallystableandexhibitsmalleramountoffineparticlelossthanthe
specimensofagapgradation,andconsequently,fineparticlelosshaslesssignificanteffectonthewettingdeform
ation.Highersurchargepressurecanreducethepromotioneffectoffineparticlelossonwettingdeformationbecause
ofthelessparticlelossunderthehigherparticleinteractionforces.Thefineparticlelossincreaseswiththeincreas
ingfallingspeedofwaterlevel ,andtherefore,largerwettingdeformationwasobservedunderthetestsofhigher
waterdischargerate.Increasingtheinitialwatercontentwillimprovethecompactnessoftherockfillmaterial ,re
sultinginatighterparticlearrangementanddifficultyinfineparticleloss,therebyfineparticlelosshaslesssignifi
canteffectonthewettingdeformation.
Keywords:rockmechanics;rockfill;wettingdeformation;particleloss;periodicalwaterlevelfluctuations
(责任编辑:李 娜)
— 4 3 —
6