Page 153 - 《水资源与水工程学报》2024年第6期
P. 153

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

            DOI:10.11705/j.issn.1672-643X.2024.06.15


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                             Unsteadyseepagemodelfordeepfoundationpitwith
                                         suspendedcurtainincoastalarea

                                                                          3
                                                                                      3
                                                              1,2
                                            1,2
                                  MENGXu ,CHENDongxia ,CHENBo,YUANBo
                 (1.SchoolofArchitectureandCivilEngineering,XiamenUniversity,Xiamen361005,China;2.FujianKeyLaboratoryof
                          DigitalSimulationsforCoastalCivilEngineering ,XiamenUniversity,Xiamen361005,China;
                                3.ChinaRailwaySouthInvestmentGroupCo.,Ltd.,Shenzhen518054,China)
                 Abstract:Toclarifytheinfluenceofoceantidalfluctuationsonthedewateringengineeringofdeepfoun
                 dationpits,anunsteadyseepagemodelforthedeepfoundationpitwithsuspendedcurtainundertidal
                 fluctuationswasestablished.ThesemianalyticsolutionofrealdomainspaceisobtainedbyLaplace
                 transform ,Fouriercosinetransform,inversetransformationandStehfestnumericalinversetransformation.
                 Subsequently,thesemianalyticsolutionisdegeneratedtoaknownsolution,andanumericalmodelises
                 tablishedbasedonCOMSOL ,soastoverifytheaccuracyofthesemianalyticsolution.Then,theinflu
                 encingparametersofthesemianalyticsolutionareanalyzed,andtheresultsshowthattidalfluctuations
                 affectthedewateringeffectofthefoundationpit,peaktidelevelreducestheinfluenceofthepumped
                 well,whilelowtidelevelintensifiesitsinfluence.Wesuggestthatthewatercurtaininsertionratioofthe
                 coastalfoundationpitshouldbenolessthan0.6toalleviatetheinfluenceofthetideonthedewatering.
                 Withtheincreaseofthedimensionratio ,coastalfoundationpitsneedtoincreasetheamountofwater
                 pumpedtomeettherequirementofdewatering.Theanisotropyofsoilpermeabilitycoefficienthasagreat
                 influenceongroundwaterseepageandshouldbeconsideredinthedesignofactualdewateringengineer
                 ing.
                 Keywords:coastaltidalfluctuation;suspendedcurtain;unsteadyseepage;dimensionratioofdeep
                 foundationpit;soillayeranisotropy

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