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ID:32715091
大小:1.49 MB
页数:47页
时间:2019-02-15
《深厚软基上土石坝坝体溢洪道泄槽末端反弧段的稳定分析》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、新疆农业大学硕士学位论文深厚软基上土石坝坝体溢洪道泄槽末端反弧段的稳定分析姓名:海彬申请学位级别:硕士专业:水利水电工程指导教师:侍克斌20090501深厚软基上土石坝坝体溢洪道泄槽末反弧段的稳定分析摘要随着水利建设的快速发展,适宜建造岸坡式溢洪道的地形、地质条件越来越少,为此,工程上已开始把溢洪道布置在土石坝坝体上。土石坝坝体溢洪道反弧段常布置在最大坝高断面的坝脚处,如果此处属于深厚软基,则必须对其进行处理。桩基础是一种深基础,主要功能是将上部结构荷载传至地下较深处的密实土层,以满足承载力和沉降的要求。因此,本文研究利用钻孔灌注桩来处理溢洪道反弧段的深厚软基,
2、使其达到稳定要求,以保证溢洪道反弧段的安全运行。通过对溢洪道反弧段和钻孔灌注桩的受力情况进行综合分析,列出所有保持溢洪道反弧段稳定的平衡方程,然后求解这些方程,得出钻孔灌注桩的深度和承载力与单宽流量之间的计算关系式。根据这种受力关系,可得出溢洪道反弧段在深厚软基上的稳定安全系数表达式。通过对钻孔灌注桩的承载力和深度及反弧段的稳定安全系数进行验算,结果满足稳定要求。因此,所推出的理论计算公式是符合工程实际的,可供类似工程设计参考。关键词:坝体溢洪道;深厚软基;反弧段;钻孔灌注桩;稳定分析StabilityAnalysisofOgeeSectionattheEndo
3、fDischargeTroughofSpillwayofEarth—rockDamonDeepSoftFoundationAbstractWiththerapiddevelopmentofwaterconstruction,topographicandgeologicconditionswhicharcsuitablefortheconstructionofthebankslopespillwaybecomemoreandmorescarcag,therefore,thespillwayhasbeenlaidoutontheearth-rockdaminengi
4、neering.Theogeesectionofdamspillwayoftheearth5、grounddensesoillayer,sotherequirementsofbearingcapacityandsettlementaremet.Thepaperdeeplystudiedtheprocessingofdeepsoftfoundationwhichprovidesgroundtoogeesectionofspillwaybyusingboredpile,whichiscapableofmakingdeepsoftfoundationmeetstabilityrequirements.Thereforethesafetyoperationofo6、gceTheallbalanceequationsstabilizingogeesectionofspillwaywereprovidedbymeansofcomprehensiveanalysesofforceconditionofog∞sectionandboredpile.Afterwards,thecalculationexpressionsofthedepthandbearingcapacityofboredpileandunitwidthdischargewerededucedbysolvingtheaboveequations.Thestabili7、tysafetyfactorexpressionwasobtainedaccordingtothisforcerelations.Theexperimentalresultsofthemethodproposedatthispapersatisfiedthestabilityrequirementsbycalculatingthebearingcapacityanddepthofboredpileandstabilitysafetyfactor.Sothetheoreticalcalculationformulasdeducedaccordedwiththeen8、gineeringpra
5、grounddensesoillayer,sotherequirementsofbearingcapacityandsettlementaremet.Thepaperdeeplystudiedtheprocessingofdeepsoftfoundationwhichprovidesgroundtoogeesectionofspillwaybyusingboredpile,whichiscapableofmakingdeepsoftfoundationmeetstabilityrequirements.Thereforethesafetyoperationofo
6、gceTheallbalanceequationsstabilizingogeesectionofspillwaywereprovidedbymeansofcomprehensiveanalysesofforceconditionofog∞sectionandboredpile.Afterwards,thecalculationexpressionsofthedepthandbearingcapacityofboredpileandunitwidthdischargewerededucedbysolvingtheaboveequations.Thestabili
7、tysafetyfactorexpressionwasobtainedaccordingtothisforcerelations.Theexperimentalresultsofthemethodproposedatthispapersatisfiedthestabilityrequirementsbycalculatingthebearingcapacityanddepthofboredpileandstabilitysafetyfactor.Sothetheoreticalcalculationformulasdeducedaccordedwiththeen
8、gineeringpra
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