南京地铁稳定性优势面理论分析
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摘要
以南京地铁为例 ,运用优势面理论分析方法 ,对控制城市浅埋隧道稳定性的优势断裂进行了分析 ,并对土体中具有规模效应的构筑物的稳定性分析发展了一套工程地质层组划分和优势层判定的分析方法。通过对南京地铁场区优势断裂和优势层的分析 ,确定南京 -湖熟断裂和定淮门 -鼓楼断裂为控制场址区工程地基稳定性的场区优势断裂 ,并控制着鼓楼岗和小红山地铁隧道的稳定性 ;地铁隧道在土层中最佳持力层为Q3 的硬粘土层Ⅲ 1,其次为Q3 的软粘土层Ⅲ 2。敏感层为Q3 的软粘土层Ⅱ 2和饱和松砂层Ⅱ 4。在保证工程的稳定性和经济的可行性情况下 ,地铁隧道的底部标高以 - 5～ - 15m为宜。
Using preferred plane theory, this paper developed a new analytical method for the preferred planes which control the urban shallow tunnel stability, taking the subway in Nanjing as an example. The new analytical method categorizes the soils into different layers and determines the preferred layers for the stability analysis of buildings in the soils. The results of the study on Nanjing subway are: ①the regional preferred faults of Nanjing are Nanjing Shuhu fault and Dinghuaimen Gulou fault which control the tunnels stability in Gulou and Xiaohongshan; ②the most favorable and mechanically stable layer for Nanjing subway is Tertiary hard clay layer(Ⅲ1), the next is the Tertiary soft clay layer(Ⅲ2); the most unfavorable layer for subway is Quaternary soft clay layer(Ⅱ2) and loose layer(Ⅱ4);③the elevation of bottom of Nanjing subway tunnels is suggested to be at -5～-15m.
Using preferred plane theory, this paper developed a new analytical method for the preferred planes which control the urban shallow tunnel stability, taking the subway in Nanjing as an example. The new analytical method categorizes the soils into different layers and determines the preferred layers for the stability analysis of buildings in the soils. The results of the study on Nanjing subway are: ①the regional preferred faults of Nanjing are Nanjing Shuhu fault and Dinghuaimen Gulou fault which control the tunnels stability in Gulou and Xiaohongshan; ②the most favorable and mechanically stable layer for Nanjing subway is Tertiary hard clay layer(Ⅲ1), the next is the Tertiary soft clay layer(Ⅲ2); the most unfavorable layer for subway is Quaternary soft clay layer(Ⅱ2) and loose layer(Ⅱ4);③the elevation of bottom of Nanjing subway tunnels is suggested to be at -5～-15m.
引文
罗国煜.环境岩土工程问题与地质灾害优势面研究观点概要.中国科协2002年减轻自然灾害白皮书.2002.
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[2] 蔡宏英,周健,李相崧.深厚覆盖软土地层多向地震动力反应分析.同济大学学报,2000,28(2):177182. CaiHongying,ZhouJianandLiXiangsong.Plasto elasticdynamicresponseofhorizontallylayeredsitesundermulti direc tionalearthquakeshaking.JournalofTongjiUniversity,2000,(1):1014.
[3] 苏红卫,何华.复杂地质条件下浅埋隧道施工方案的研究.地质与勘探,2000,36(3):7578. SuHongweiandHeHua.Studiesonconstructionmethodofshallowtunnelunderdifficultground.GeologyandProspect ing,2000,36(3):7578.
[4] 梅志荣.浅埋隧道围岩稳定特征及地表竖向锚杆支护效应的非线性有限元分析.中国铁道科学,1992,(1):97107. MeiZhirong.NonlinearityFEManalysisfortunnelstabilityinshallowoverburdenandtheeffectsofthesupportofgroundanchoresatsurface.ChinaRailwaySciences,1992,(1):97107.
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[7] SatoK ,TokiK ,SawadaY .Assessmentoftheverticaldistributiononseismicgroundmotion.SoilDynamicsandEarth quakeEngineering,2000,19:413433.
[8] SenzaiS ,HajimaO ,TakashiM .Astudyofthedamageofsubwaystructuresduringthe1995HanshinAwajiearthquake.CementandConcreteComposites,1997,19:223239.
[9] LeeIM ,NamSW .Thestudyofseepageforcesactingonthetunnelliningandtunnelfaceinshallowtunnels.TunnellingandUndergroundSpaceTechnology,2001,16:3140.
[10] YamaguchiI ,YamazakiI ,KiritaniY .Studyofground tunnelinteractionsoffourshieldtunnelsdrivenincloseproximity,inrelationtodesignandconstructionofparallelshieldtunnels.TunnellingandUndergroundSpaceTechnology,1998,13(3):289304.
[11] AnthonyFS ,IRichardR ,RichardJP ,etal.Escandon.LosAngelesmetrorailproject geologicandgeotechnicaldesignandconstructionconstraints.EngineeringGeology,1999,51:203224.
[12] 吕和林.一种用于浅埋隧道抗震分析的拟静力数值方法.西南交通大学学报,1999,34(3):315319. LuHelin.Amimeticstaticsnumericmethodonearthquakeresistanceanalysisofshallowburiedtunnels.JournalofSouth westJiaotongUniversity,1999,34(3):315319.
[13] 罗国煜,刘松玉.区域稳定性优势面分析理论与方法.岩土工程学报,1992,14(6):1018. LuoGuoyuandLiuSongyu.AnalysisofregionalstabilitybytheoryofPreferredPlane.ChineseJournalofGeotechnicalEngineering,1992,14(6):1018.
[14] 罗国煜,陈新民,李晓昭,等.城市环境岩土工程.南京:南京大学出版社,2000. LuoGuoyu,ChenXinmin,LiXiaozhao,etal.Urbanenvironmentalgeotechnology.Nanjing:NanjingUniversityPress,2000.
[15] 罗国煜,阎长虹,李晓昭,等.关于工程地质学基本理论的认识.河海大学学报,2001,29(增刊):69. LuoGuoyu,YanChanghong,LiXiaozhao,etal.Understandingofbasictheoriesofengineeringgeology.JournalofHohaiUniversity,2001,29(Supplement):69.
[1] 孙海涛,徐迎伍.软土地层中盾构隧道地震反应分析.勘察科学技术,2000,(1):1014. SunHaitaoandXuYingwu.Seismicresponseanalysisforashieldtunnelinsoftsoilfoundation.SiteInvestigationScienceandTechnology,2000,(1):1014.
[2] 蔡宏英,周健,李相崧.深厚覆盖软土地层多向地震动力反应分析.同济大学学报,2000,28(2):177182. CaiHongying,ZhouJianandLiXiangsong.Plasto elasticdynamicresponseofhorizontallylayeredsitesundermulti direc tionalearthquakeshaking.JournalofTongjiUniversity,2000,(1):1014.
[3] 苏红卫,何华.复杂地质条件下浅埋隧道施工方案的研究.地质与勘探,2000,36(3):7578. SuHongweiandHeHua.Studiesonconstructionmethodofshallowtunnelunderdifficultground.GeologyandProspect ing,2000,36(3):7578.
[4] 梅志荣.浅埋隧道围岩稳定特征及地表竖向锚杆支护效应的非线性有限元分析.中国铁道科学,1992,(1):97107. MeiZhirong.NonlinearityFEManalysisfortunnelstabilityinshallowoverburdenandtheeffectsofthesupportofgroundanchoresatsurface.ChinaRailwaySciences,1992,(1):97107.
[5] 房营光,孙均.地面荷载下浅埋隧道围岩的粘弹性应力和变形分析.岩石力学与工程学报,1998,17(3):239247. FangYingguangandSunJun.Analysisofvisco elasticstressanddeformationofsurroundingrockforshallowtunnelundergroundload.ChineseJournalofRockMechanicsandEngineering,1998,17(3):239247.
[6] WilliamDO .Thebehaviouroftunnelsatgreatdepthunderlargestaticanddynamicpressures.TunnellingandUnder groundSpaceTechnology.2001.16:4148.
[7] SatoK ,TokiK ,SawadaY .Assessmentoftheverticaldistributiononseismicgroundmotion.SoilDynamicsandEarth quakeEngineering,2000,19:413433.
[8] SenzaiS ,HajimaO ,TakashiM .Astudyofthedamageofsubwaystructuresduringthe1995HanshinAwajiearthquake.CementandConcreteComposites,1997,19:223239.
[9] LeeIM ,NamSW .Thestudyofseepageforcesactingonthetunnelliningandtunnelfaceinshallowtunnels.TunnellingandUndergroundSpaceTechnology,2001,16:3140.
[10] YamaguchiI ,YamazakiI ,KiritaniY .Studyofground tunnelinteractionsoffourshieldtunnelsdrivenincloseproximity,inrelationtodesignandconstructionofparallelshieldtunnels.TunnellingandUndergroundSpaceTechnology,1998,13(3):289304.
[11] AnthonyFS ,IRichardR ,RichardJP ,etal.Escandon.LosAngelesmetrorailproject geologicandgeotechnicaldesignandconstructionconstraints.EngineeringGeology,1999,51:203224.
[12] 吕和林.一种用于浅埋隧道抗震分析的拟静力数值方法.西南交通大学学报,1999,34(3):315319. LuHelin.Amimeticstaticsnumericmethodonearthquakeresistanceanalysisofshallowburiedtunnels.JournalofSouth westJiaotongUniversity,1999,34(3):315319.
[13] 罗国煜,刘松玉.区域稳定性优势面分析理论与方法.岩土工程学报,1992,14(6):1018. LuoGuoyuandLiuSongyu.AnalysisofregionalstabilitybytheoryofPreferredPlane.ChineseJournalofGeotechnicalEngineering,1992,14(6):1018.
[14] 罗国煜,陈新民,李晓昭,等.城市环境岩土工程.南京:南京大学出版社,2000. LuoGuoyu,ChenXinmin,LiXiaozhao,etal.Urbanenvironmentalgeotechnology.Nanjing:NanjingUniversityPress,2000.
[15] 罗国煜,阎长虹,李晓昭,等.关于工程地质学基本理论的认识.河海大学学报,2001,29(增刊):69. LuoGuoyu,YanChanghong,LiXiaozhao,etal.Understandingofbasictheoriesofengineeringgeology.JournalofHohaiUniversity,2001,29(Supplement):69.
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