Page 189 - 《水资源与水工程学报》2022年第4期
P. 189

!33 " ! 4 #                       & ' ( ) & * + , -                               Vol.33No.4
               2022 $ 8 %               JournalofWaterResources&WaterEngineering                 Aug.,2022

            DOI:10.11705/j.issn.1672-643X.2022.04.25


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                 FGHIJ:TU411   KLMNO:A    KPQJ:1672643X(2022)04018507

                        Mechanicaltestandmechanism studyofgraniteresidualsoil
                                       modifiedbyfiberandnanomaterials

                                                                     1
                                                                                 3
                                                      1,2
                                        WANGZhibing ,LIUJinming,GUXiang
                 (1.CollegeofCivilEngineeringandArchitecture,GuilinUniversityofTechnology,Guilin541004,China;2.GuangxiKey
                      LaboratoryofGeomechanicsandGeotechnicalEngineering ,Guilin541004,China;3.SouthwestNonferrous
                            KunmingExplorationSurveyingandDesigning(Institute)Inc.,Kunming650217,China)
                 Abstract:Whendealingwithspecialsoil,itisveryimportanttochooseenvironmentfriendlyandlow
                 costmaterialswithgoodpropertiesforthestrengthening.Inordertostudytheeffectofbasaltfiberand
                 nanoironoxideonthemechanicalpropertiesofgraniteresidualsoil ,sampleswithdifferentdosagesand
                 mixingmethodswerepreparedfortheconsolidationandundrainedtriaxialsheartest ,andthemicro
                 mechanismoftheprocessedsampleswasanalyzedbyscanningelectronmicroscope(SEM).Theexperi
                 mentalresultsshowthattheshearstrengthofsoilsamplesfirstincreasesthendecreaseswiththeincrease
                 ofthedosageofbasaltfiber ,andpeakswhenthedosagereaches1%;whereastheshearstrengthofsoil
                 samplesincreasesmonotonouslywiththeincreaseofnanoironoxidecontent.Boththesingleagentand
                 compositeagentsmethodscanimprovethecohesionofthesoil,butnottheinternalfrictionangle.Inad
                 dition ,theeffectofcompositemodifiedsoilsampleonsoilshearstrengthismoreobviousthanthatofsin
                 glemodifiedsoilsample.Theimprovementofsoilshearstrengthiscontributedbytheinterlockingmesh
                 betweenthebasaltfiberandsoil ,andthefillingofthegapsbetweensoilparticlesbynanoironoxide.
                 Themethodofcompositesoilsamplemodificationcaneffectivelyimprovetheshearstrengthcharacteristics
                 ofgraniteresidualsoil.
                 Keywords:graniteresidualsoil;basaltfiber;nanoironoxide;scanningelectronmicroscope(SEM);
                 triaxialtest

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