基于“壩前淤積面加壩”技術(shù)的土壩穩(wěn)定性分析——以寧夏南部山區(qū)雅石溝水庫為例.pdf

1、寧夏大學(xué)碩士學(xué)位論文基于“壩前淤積面加壩”技術(shù)的土壩穩(wěn)定性分析－－以寧夏南部山區(qū)雅石溝水庫為例姓名：張園園申請學(xué)位級別：碩士專業(yè)：水利工程指導(dǎo)教師：王紅雨；陸立國201205TheStabilityAnalysisofEarthDamBaseon“UpstreamSedimentaryHeighteningFill’’AbstractInrecentyears，ourcountryhasincreasedtheinvestmentint

2、hereinforcementproblemsofthesmallandmediumsizedreservoirsBecauseofnaturalconditions，socialeconomicfactors，damtreatmentmeasuresaredifferentindifferentareasInthelightofupstreamsedimentaryheighteningfillhavebeenwidelyusedin

3、southmountainousareaofNingxia，consideringthelackofthetheoreticalresearch，inthisthesis，Yashigoureservoiristakenasresearchobject，thereservoirdamfillingheighteningtheconstructionprocess，consolidationsettlement，seepageandund

4、erdifferentconditionsofdamslopestabilityanalysisaretakenastheresearchcontent，basedonfiniteelementsoftwareofPIAXIS，damtypicaltwO—dimensionalnumericalmodeloftheCROSSistakenasresearchtool，thedamforconsolidationsettlementlev

5、elandverticaldisplacement，seepageandslopestabilityfeaturesofthedamareanalyzedandcalculatedThemainresearchcontentsandachievementsofthispaperareasfollows：(1)Basedonalotofreadingrelevantliteratures，seepagedamagetypesandmech

6、anismforthehomogeneousearthdamareelaborated，methodandprinciplearesummarizedandanalyzed；differentmethodsoftheslopestabilityanalysisarelistsandcontrasted，finallythefiniteelementstrengthreductionischosenfordamslopestability

7、calculationunderseepagecondition(2)TakeYashigoureservoir’Shilghdamasmodel，theseepagesimulationiscarried，thepercolationsituationisanalyzedunderdifferentworkingconditions，andtheporewaterpressure，flowdirection，singlewidesee

8、pageflowandhydraulicslopeoftheresultsareconcludedAndconcludesthatthewaterlevelplunged，withinthedamslopereducedinfiltrationlinetoolate，thatisinthewaterlevelofdamslopeofthedeclineofthelaggingeffect，theexcessporewaterpressu

9、reisformedindamslope，intheporewaterwillbepartofthedamupstreamdamslopefromthespin，itwillinfluencetheupstreamdamslopestability(3)Basedontheresultsoftheseepageanalysis，damslopestabilitynumericalsimulationistakenunderthecons

10、iderationofseepageforce，theresultsshowthatthedamslopeofthereservoirsafetyfeaturesValidationthemethodofupstreamsedimentaryheighteningfillisreasonableornotApplythePI_AXISsoftwareforthenormalstoragelevelandcheckfloodlevelon

11、5m／d，4m／d，3rn／d，2m／d，1m／dspeeddowntodeathofwaterlevelsimulation，andtheresultsshowthat：whenthereservoirwaterleveldeclinesastherateof2m／d，theupstreamdamslopestabilitysafetycoefficientisbigger，moretendstosafe，andsuggestthat

12、thereservoircouldn’tgetgreaterthan2m／dratedischargewatermoreappropriateAllconditions，thedamofYashigoureservoir’Supstreamanddownstreamofslopestabilitycanmeetthestandardrequirement，thedamstabilitymeetssafetyrequirementsSot