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时间:2019-05-13
《锦屏一级水电站左坝肩边坡稳定性研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第25卷第11期岩石力学与工程学报Vol.25No.112006年11月ChineseJournalofRockMechanicsandEngineeringNov.,2006锦屏一级水电站左坝肩边坡稳定性研究周钟,巩满福,雷承第(中国水电顾问集团成都勘测设计研究院,四川成都610072)摘要:从工程区的自然稳定斜坡调查入手,利用前期勘测的横剖面结果,获得工程区的砂板岩边坡和大理岩边坡的自然稳定斜坡的坡形数据;结合中国已建和在建水电边坡的开挖情况,采用自然斜坡比拟法和工程地质类比法综合确定拱间槽边坡的地质建议开挖坡比。在坝头深裂详细调查研究的基础上,分析拱间槽边
2、坡开挖前后的可能失稳破坏模式及失稳块体的边界条件;通过采用三维极限平衡方法对可能失稳块体的计算模型进行分析,得到块体开挖前后的稳定系数;对失稳块体的稳定性进行详细评价,并提出块体加固方案建议,对类似工程提供可以借鉴的经验。关键词:水利工程;拱间槽;岩石高边坡;三维极限平衡分析方法;边坡稳定性分析中图分类号:TV56文献标识码:A文章编号:1000–6915(2006)11–2298–07RESEARCHONSTABILITYOFSLOPEATLEFTABUTMENTOFJINPINGFIRSTSTAGEHYDROPOWERSTATIONZHOUZhong,GON
3、GManfu,LEIChengdi(ChengduHydroelectricInvestigationandDesignInstitute,ChinaHydropowerConsultingGroup,Chengdu,Sichuan610072,China)Abstract:Firstofall,accordingtotheresearchonthetransversesectionsofthestablenatureslopeintheengineeringarea,theslopeshapedataofthesand-slateandmarbleslopes
4、aregained.Secondly,incombinationwithdataacquiredfromsomeslopesofthebeingbuiltorbuilthydropowerstationsandnaturalslopes,theexcavationangleisrecommendedforthedamabutmentslopefromperspectiveofgeology.Thirdly,basedonthecharactersresearchofthedeepfractureattheleftabutmentslopeindetail,the
5、failuremodeoftheabutmentslopeandboundaryconditionofthepotentialfailureblockafterexcavationareanalysed.Duringtheanalyses,3Drigidlimitequilibriummethodisusedtoanalyzethestabilityofthepotentialfailureblockinabutmentslopeinthenatureandexcavatedstagesindividually.Whatismore,thecomputation
6、modelcanbeestablishedmassivelyorsectionallyaccordingtotheassumptionofdifferentboundaryconditionsofthepotentialfailureblock.Finally,throughcomprehensiveanalysis,theconclusionthatthesectionalcomputationmodelisaccordancewiththedamabutmentslopeengineeringisdrawn.Reinforcementmeasuresarep
7、utforwardforthehighslopes.Theresultscannotonlysolvethepracticalengineeringproblemsbutalsoprovidesomereferentialexperiencesforsimilarprojects.Keywords:hydraulicengineering;spandrelgroove;highrockslope;3Dlimitequilibriumanalysismethod;slopestabilityanalysis收稿日期:2006–01–28;修回日期:2006–06–
8、09作者简介:周钟(19
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