Page 161 - 《水资源与水工程学报》2024年第6期
P. 161

! 35 " ! 6 #                      & ' ( ) & * + , -                               Vol.35No.6
               2024 $ 12 %              JournalofWaterResources&WaterEngineering                 Dec.,2024

            DOI:10.11705/j.issn.1672-643X.2024.06.16


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                 HIJKL:TV543   MNOPQ:A    MRSL:1672643X(2024)06015712
           Diffusionpatternsofpulsatinggroutinginporousmediaunderseepageconditions


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                      LIPiao,LIAOYi,CHANGLiuhong,XUEXiong,HUPengcheng,ZHUYong
            (1.SchoolofHydraulicandEnvironmentalEngineering,ChangshaUniversityofScience&Technology,Changsha410114,China;2.Research
             andDesignInstituteofSinohydroEngineeringBureau8Co.,Ltd.,PowerConstructionCorporationofChina,Changsha410004,China)
                 Abstract:Effectivediffusionofslurryduringpulsatinggroutingiscrucialforimprovingtheoveralleffi
                 ciencyofseepagecontrolprojects.BasedonthebasictheoryoftwophaseDarcy’slaw,anumerical
                 modelisestablishedtosimulatethepulsatinggroutingdiffusionprocessunderseepageconditions.The
                 effectsofparameterssuchasfinalpressure ,duration,aswellassuccessiveperiodandintervalsofpulsa
                 tinggroutingonthegroutingofporousmediaareanalyzedunderseepageconditions.Theresultsshow
                 thattheslurrydrivenbythepulsatinggroutingpressurescattersbothinthediffusionregionagainstthe
                 flowandthediffusionregionwiththeflow.Whengroutingfor300seconds ,thediffusionradiusofthere
                 gionwiththeflowis2-4timesthatoftheregionagainsttheflow.Asthefinalpressureofpulsatinggrou
                 tingincreasesandthedurationadvances ,thediffusiondistanceoftheslurryincreaseslogarithmically,
                 andthediffusionrangeandslurryconcentrationincreasesgradually.Whengroutingfor900seconds,the
                 diffusionradiusoftheslurryintheregionwiththeflowatthefinalpressureof2.4MPais23.5timesthat
                 atthefinalpressureof0.4MPa.Whengroutingfor300seconds ,thediffusionradiusanddiffusionopen
                 ingoftheslurryintheregionagainsttheflowreachstability.Whenthefinalpressureofpulsatinggrou
                 tingis2.4MPa ,thediffusionradiusanddiffusionopeningoftheslurryintheregionagainstthefloware
                5.9and5.6timeshigherthanwhenthefinalpressureis0.4MPa,respectively.Asthesuccessiveperi
                 odofpulsatinggroutingincreasesfromtwototenseconds ,thediffusiondistanceoftheslurryincreases
                 logarithmically.Asthepulsationintervalincreasesfromtwosecondstoeightseconds,thediffusiondis
                 tanceoftheslurrydecreaseslogarithmically.

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