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时间:2018-07-18
《多层复杂滑坡的稳定性分析与支护选择》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、多层复杂滑坡的稳定性分析与支护选择第26卷增2岩石力学与工程学报Vol.26Supp.22007年12月ChineseJournalofRockMechanicsandEngineeringDec.,2007杨涛1,张忠平2,马惠民2(1.西南交通大学岩土工程系,四川成都610031;2.中铁西北科学研究院,甘肃兰州730000)摘要:工程中常见发育多层滑面的大型复杂滑坡,受工程边坡的改造和工程结构的作用其坡体结构与应力状态都发生改变,原有的滑面可能不再是最危险滑面,而会在原滑面的基础上形成新的最危险滑面,目前工程中对此关注不多。提出指定剪出点的稳定性核算方法,假定工后滑坡中的最危险
2、滑面为新生滑面与原滑面的组合滑面,采用一种新的搜索方法确定坡面各点的安全系数,据此对多层复杂滑坡进行稳定性分析,在此基础上进行滑坡的支护选型并确定合理的支护设置位置,以实际工程为例详细论述该方法的应用步骤,并提出大型滑坡的支护设置原则,研究结果对大型复杂滑坡的支护选型和设计有一定指导意义。关键词:边坡工程;滑坡;安全系数;边坡稳定;支护设计中图分类号:P642.22文献标识码:A文章编号:———————————————————————————————————————————————1000–6915(2007)增2–4189–06STABILITYANALYSISANDSUPPORT
3、INGSELECTIONOFMULTI-LAYERCOMPLEXLANDSLIDEYANGTao1,ZHANGZhongping2,MAHuimin2(1.DepartmentofGeotechnicalEngineering,SouthwestJiaotongUniversity,Chengdu,Sichuan610031,China;2.NorthwestInstituteofChinaRailwayCo.,Lanzhou,Gansu730000,China)Abstract:Therearesomecomplicatedlandslideswithseverallayersof
4、slippingplaneinthegeotechnicalengineering.Becauseofthealterationofengineeringslopeandtheactionofengineeringstructure,theslopestructureandstressstatewillbechanged.Theoriginalslidesurfaceisnotthemostcriticalone,butthenewcriticalslidesurfacewillformbasedonit.Nowlittleattentionispaidtoit.Inthispape
5、r,astabilitycalculationmethodwiththespecifiedshear-outpointisproposed,andanewsearchprocedureisadoptedtocalculatefactorofsafetyofeachpointontheslopesurface.Thismethodassumesthatthemostcriticalslidesurfacesafterconstructionisthecombinedslidingsurfacesofthenewandtheoriginal.Basedonthemethod,thesta
6、bilityanalysisisconductedforthemulti-layercomplexlandslide.Andtheresultisadoptedtodesignsupportingstructureformandtodeterminetheappropriatesupportingposition.Takingapracticalengineeringslope———————————————————————————————————————————————asanexample,theapplicationprocedureofthismethodisdescribed
7、indetails;andthedesignprincipleofsupportingforlargescaleslideissuggested.Theresearchresultismeaningfulforsupportingdesignofcomplicatedlandslide.Keywords:slopeengineering;landslide;factorofsafety;slopestability;supportingdesign1引言体
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