桂林市喀斯特危岩体发育特征及稳定性分析
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摘要
危岩体是由多组的结构面组合而形成,在地表风化作用、卸荷作用、重力、地震、降雨等诱发因素作用下处于不稳定、欠稳定或极限平衡状态的岩体。通过对桂林市15座山的326块危岩体发育情况进行实地调查、测绘,得到了几组重要数据,根据危岩体的结构特征和状态特征,将桂林市的危岩体类型分为临空型、倾倒型、贴坡型、孤石型4种基本类型,以白岩山3号危岩体为对象采用极限平衡法对该危岩体稳定性进行了定量验算,综合分析评价了桂林市危岩体的发育特征及稳定性。
Dangerous rock masses are rock masses that are in unstable,less stable or limit equilibrium state under actions of surface weathering,unloading,gravity,earthquake,rainfall and so on.They are formed by groups of structure surfaces.In this paper,the authors got some important data through the investigation and mapping on the 326 dangerous rock masses in 15 mountains in Guilin City,and according to the structure and state features of dangerous rock masses,classified them into four types: overhead type,dumping type,posted slope type and isolated type.Then,taking the No.3 dangerous rock mass of Baiyan Mountain as an example,a quantitative calculation was conducted to examine the stability of the rock mass using limit equilibrium method,and the development characteristics and the stability dangerous rock masses in Guilin City was analyzed and evaluated comprehensively.
Dangerous rock masses are rock masses that are in unstable,less stable or limit equilibrium state under actions of surface weathering,unloading,gravity,earthquake,rainfall and so on.They are formed by groups of structure surfaces.In this paper,the authors got some important data through the investigation and mapping on the 326 dangerous rock masses in 15 mountains in Guilin City,and according to the structure and state features of dangerous rock masses,classified them into four types: overhead type,dumping type,posted slope type and isolated type.Then,taking the No.3 dangerous rock mass of Baiyan Mountain as an example,a quantitative calculation was conducted to examine the stability of the rock mass using limit equilibrium method,and the development characteristics and the stability dangerous rock masses in Guilin City was analyzed and evaluated comprehensively.
引文
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[3]杨转运,刘会,叶四桥,等.危岩体发育的典型环境条件分析[J].公路交通技术,2005(6):106-110.YANG Zhuanyun,LIU Hui,YE Siqiao,et al.Analysis of typical conditions of unstable rock development technocogy of highway and transport[J].Technocogy of Highway and Transport,2005(6):106-110.(in Chinese)
[4]刘宝臣,郑金,向志坤.桂林市屏风山西侧危岩成因及稳定性分析[J].地质灾害与环境保护,2012,23(2):60-64.LIU Baochen,ZHENG Jin,XIANG Zhikun.Formation and stability of unstable rocks at the west slope of screen mount in Guilin city[J].Journalof Geological Hazards and Environment Preservation,2012,23(2):60-64.(in Chinese)
[5]谢全敏,夏元友.危岩块体稳定性的综合评价方法分析[J].岩土力学,2002,23(6):775-781.XIE Quanmin,XIA Yuanyou.Comprehensive assessment method of stability of critical rock-block mass and its application[J].Rock and SoilMechanics,2002,23(6):775-781.(in Chinese)
[6]叶四桥,陈洪凯,唐红梅.落石冲击力计算方法[J].中国铁道科学,2010,31(6):56-62.YE Siqiao,CHEN Hongkai,TANG Hongmei.The calculation method for the impact force of the rockfall[J].China Railway Science,2010,31(6):56-62.(in Chinese)
[7]陈洪凯,唐红梅,王蓉.三峡库区危岩稳定性计算方法及应用[J].岩石力学与工程学报,2004,23(4):614-619.CENG Hongkai1,TANG Hongmei1,WANG Rong.Calculation method of stability for unstable rock and application to the three gorges reservoir[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(4):614-619.(in Chinese)
[8]陈洪凯,唐红梅,胡明,等.三峡水库区危岩研究及防治新理念[J].中国地质灾害与防治学报,2004,15(增刊1):27-32.CHEN Hongkai1,TANG Hongmei1,HU Ming,et al.New concept of research&control of dangerous-rock mass in the Three Gorges ReservoirRegion[J].The Chinese Journal of Geological Hazard and Control,2004,15(S1):27-32.(in Chinese)
[9]黄润秋,刘卫华.平台对滚石停积作用试验研究[J].岩石力学与工程学报,2009,28(3):516-524.HUANG Runqiu,LIU Weihua.Platform resistant test on rolling rock blocks[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(3):516-524.(in Chinese)
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