Page 187 - 《水资源与水工程学报》2022年第5期
P. 187

!33 " ! 5 #                       & ' ( ) & * + , -                               Vol.33No.5
               2022 $ 10 %              JournalofWaterResources&WaterEngineering                 Oct.,2022

            DOI:10.11705/j.issn.1672-643X.2022.05.23


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                        Strengtheningeffectof Robiniapseudoacacia rootsystem with

                                      differentgrowthyearsonloessslopes

                                                                3
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                             LEILei ,WANHao ,JIANGTao,SHIYiqing,LPinghai,
                                                                                    5
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                                                                      5
                                    TIANKanliang ,WANGXiaodong,YANGAoqiu
           (1.ElectricPowerResearchInstituteofStateGridShaanxiElectricPowerCompanyLimited,Xi'an710100,China;2.StateGrid(Xi’an)
             EnvironmentalProtectionTechnologyCenterCompanyLimited,Xi’an710100,China;3.StateGridShaanxiPowerCompanyLimited,
               Xi’an710048,China;4.InstituteofSoilandWaterConservation,ChineseAcademyofSciencesandMinistryofWaterResources,
                 Yangling712100,China;5.InstituteofSoilandWaterConservation,NorthwestA&FUniversity,Yangling712100,China)
                 Abstract:Plantslopeprotectionmeasuresplayanimportantroleintheimprovementofloessslopestabil
                 ityandtherestorationofecologicalenvironment.Here,theshearstrengthofundisturbedRobinia
                 pseudoacaciarootcompositesoilwasmeasuredbyalargedirectsheardevice,andthereinforcement
                 effectsofRobiniapseudoacaciarootsystemwithdifferentgrowthyearsonloessslopeswereanalyzedby
                 thegeotechnicalengineeringnumericalcalculationsoftwareFLAC3D.Theresultsshowthattheplant
                 rootscanimprovetheshearstrengthofrootcompositesoilsignificantlybecausetherootsystemplaysthe
                 roleofreinforcementanchoringinthesoil ,andtheshearstrengthofrootcompositesoilconformstoMohr
                 Coulombstrengthcriterion.Theshearstrengthofrootcompositesoilincreasedwiththeincreaseofroot
                 growthyears,thecohesion(c)andinternalfrictionangle( φ)of3-7aRobiniapseudoacaciaun
                 disturbedrootcompositesoilwere44.46- 88.91kPaand23.89°-28.85°respectively ,and7a
                 Robiniapseudoacaciarootcompositesoilhadthehighestshearstrength,itscand φ were211% and31%
                 higherthanrootlesssoilrespectively.Plantrootscanstrengthentheloessslopeandimproveitsstability,

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