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ExperimentalstudyonwaterstabilityofYellowRiversiltsolidified
bysoybean - ureaseinducedcarbonateprecipitation
1,2,3
1,2,3
WANGYuke 1,2,3 ,CHENHao ,SONGYingbin 2,4,5 ,WANGZhenhai ,
1,2,3
1,2,3
ZHONGYanhui ,ZHANGBei
(1.SchoolofWaterConservancyandTransportation,ZhengzhouUniversity,Zhengzhou 450001,China;
2.NationalLocalJointEngineeringLaboratoryofMajorInfrastructureTestingandRehabilitationTechnology,
Zhengzhou 450001,China;
3.Provincialandministerialcollaborativeinnovationcenterforundergroundengineeringdisasterpreventionandcontrol,
Zhengzhou 450001,China;
4.YellowRiverWaterResourcesCommission,YellowRiverInstituteofHydraulicResearch,Zhengzhou 450003,China;
5.RasearchCenteronLeveeSatefy&DisasterPrevention,MinistyofWaterResources,Zhengzhou 450003,China)
Abstract:Withtheproposalofthenationalstrategyof“transportationpower”andtherapiddevelopmentofengi
neeringconstructionalongtheYellowRiver,thedemandforfillingsoilhasincreaseddramatically.Thefeasibility
oftheYellowRiversiltasfillmaterialhasbeenconfirmed ,butitsserviceperformanceinrainyareasneedstobe
improved.Exploringanecologicalandefficientsiltreinforcementmethodtoimproveitswaterstabilityiscritical.
Basedonthis ,enzyme - inducedcalciumcarbonateprecipitation(EICP)curingoftheYellowRiversiltisproposed
inthispaper.WaterstabilitytestsonthecuredYellowRiversiltunderconventionalimmersionconditionsanddry -
wetcycleconditionswerecarriedoutrespectively.Themasslossandstrengthlossofthesamplesafterimmersion
werestudied.Theeffectlawofdry - wetcyclesonthesofteningindexofcuredYellowRiversiltsampleswasana
lyzed.TheresultsshowthatthedisintegrationprocessoftheYellowRiversiltsamplesolidifiedbyEICPtechnology
isslowerthanthatoftheoriginalsample.TheYellowRiversiltsampleswithcementconcentrationC = 1.5mol?Lre
mainedalmostintactafterlong - term(56d)waterimmersion,withmassandstrengthlossratesofonly6.36% and
6.21%,respectively.After10dry - wetcycles,theYellowRiversiltsampleswithdifferentcementconcentrations
showeddifferentdegreesofparticlelooseningandshedding.ThelossofcompressivestrengthoftheYellowRiver
siltsamplewithcementconcentrationC = 1.5mol?Landgroutingtimes N = 10wasonly9.96%,andtheresistance
towet - drycycleswasthestrongest.ByusingEICPtechnology ,theYellowRiversiltcanbeeffectivelysolidified
anditswaterstabilitycanbeimproved ,whichisveryimportantforpromotingtheprocessofresourceutilizationof
theYellowRiversilt.
Keywords:YellowRiversilt;EICP;dry - wetcycles;massloss;strengthloss;softeningindex
(责任编辑:耿庆斋)
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