Page 155 - 《水资源与水工程学报》2023年第3期
P. 155

!34 " ! 3 #                       & ' ( ) & * + , -                               Vol.34No.3
               2023 $ 6 %               JournalofWaterResources&WaterEngineering                 Jun.,2023

            DOI:10.11705/j.issn.1672-643X.2023.03.19


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                 ABCDE:TV871   FGHIJ:A    FKLE:1672643X(2023)03015107
                  Optimizationanalysisofthreedimensionalseepagecontrolstructurein
                        dikeengineeringconsideringstratum permeabilityanisotropy


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                         LIUWu,YUANWenjun,YANZhouwei,CHENGJin,SHANGJinhang
                             (1.CollegeofCivilEngineering,HefeiUniversityofTechnology,Hefei230009,China;
                                  2.AnhuiShui’anConstructionGroupCo.,Ltd.,Hefei230601,China)
                 Abstract:Theperformanceoftheseepagecontrolstructuredirectlyaffectsthesafeoperationofthedike
                 whenitisconstructedonapermeablefoundationwithlongstretch.Accordingtotheengineeringgeolog
                 icalconditionsofthelongdikeintheHuduxiProjectreservoirareaontheMinjiangRiver ,thelayoutof
                 thehighpressurejetgroutedcutoffwallatthedikefoundationisoptimizedandanalyzedusingthethree
                 dimensionalseepageanalysismethod.Calculationresultsshowthatthehighpressurejetgroutedcutoff
                 wallcaneffectivelyreducethegroundwaterlevelandtheleakageofreservoirwatertotheprotectedlow
                 lyingareabehindthedike ,butitsseepagecontroleffectisaffectedbythespatialdistributionlength,
                 depthandpermeabilityoftheseepagecontrolstructureandthepermeabilityanisotropyofthestratumma
                 terials.Theminimumspatiallengthofthecutoffwallthatmeetstherequirementofnooverflowinthe
                 protectedlowlyingareadecreaseswiththeincreaseofitslayoutdepthandtheimprovementofconstruc
                 tionquality.Theseepagecontroleffectisobviouswhenthehydraulicconductivityofthecutoffwallis
                               -5
                 lowerthan1×10 cm/sandthestrongpermeablestratumiscutoff;however,furtherenhancementof
                 theconstructionqualityandlayoutdepthdoesnotsignificantlyimprovetheseepagecontroleffect.The
                 permeabilityanisotropyhaslittleinfluenceontheimprovementoftheseepagecontroleffectcausedbythe
                 enhancedconstructionqualityofthecutoffwall,whereasincreasingthelayoutdepthhasagreatinflu

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