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时间:2019-02-04
《边坡稳定分析的三维spencer法》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、维普资讯http://www.cqvip.com第24卷第l9期岩石力学与工程学报、,o1.24No.19Dcf.,20052005年lO月ChineseJournalofRockMechanicsandEngineering边坡稳定分析的三维Spencer法张均锋,王思莹,祈涛(1.中国科学院力学研究所,北京100080:2.中国科学技术大学力学和机械工程系,安徽合肥230026)摘要:将边坡稳定分析中的二维Spencer法拓展到了三维。该方法对所有条块满足力的平衡以及整体力矩平衡,克服了其他方法中只适用对称问题的缺点,不需已知滑动方向,还可根据滑面的几何特征,
2、进一步得到各条块局部的稳定性系数及其潜在的滑动方向。此外,给出了该方法的实现步骤,其算法的收敛性也较好。最后以不对称问题为算例,并与其他文献中的结果进行比较,验证了该方法的可行性和有效性。关t词:边坡工程;三维边坡分析;稳定性分析;极限平衡中圈分类号:P642.2文献标识码:A文章编号:1000—6915(2005)19—3434—06THREE.DIMENSIoNALSPENCERMETHoDFoRSLoPESTABILITYANALYSISZHANGJun.feng,WANGSi.ying,QITao(1.InstituteofMechanics,Chines
3、eAcademyofSciences,Be(ring100080,China;2.DepartmentofModernMechanics,UniversityofScienceandTechnologyofChina,Hefei230026,China)Abstract:Thetwo‘dimensionalSpencermethodiSextendedtothree-dimensionalslopestabilityanalysis,inwhichallforcesactingonthediscretizedblocksaretakenintoaccount.Th
4、estaticforceequilibriuminallthreedirectionsissatisfied:andthetotalmomentequilibriumisalsosatisfied.Inthismethod,thepotentialslidingmassisdividedintorigidblocks.Theinter-blockforcesandtheirdirectionareinvolvedinthecomputingprocess.Itdoesnotneedpreviouslyknownmainslidingdirectionofthesl
5、ope.Hence,thenumberofassumptionsbeingintroducedislessthanthatinotherthree-dimensionalanalysismethods.Thismethodcanbeappliedtovarioustypesofpotentialslidingsurfaces,complicatedgeologicalboundariesandstratifications,waterpressure,andearthquakeloading,especiallyfortheslopewithasymmetrica
6、lprofile.Thisproposedmethodholdstheadvantagesofthe2DSpencermethod.Theconvergenceoftheiterativecalculatingprocessinthismethodisbetterthanthatofothermethods.Inaddition,thismethodnotonlygivesonevalueofthesafetyfactorsforanintegratedslope,butalsoanalyzesthesafetyfactoranditsslidingdirecti
7、onforeachblockaccordingtothecharacteristicsofitsslidingsurface.Thenumericalapproachesandstepsareprovidedtoachievetheprogramoftheproposedmethodfor3Dslopestabilityanalysis.Someprogrammingtechniquesarealsoproposedtoensurethepracticabilityandvalidityofthemethod.Moreover,anasymmetricalexam
8、pleis
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