巫溪南门湾危岩体稳定性分区研究
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摘要
危岩体是影响人类生命财产安全与工程活动的自然地质灾害之一。对危岩体的勘察、稳定性评价与防治是地质灾害防治的研究难题。受危岩体复杂地质特征影响,南门湾危岩体由20余个危岩块体组成,其防治设计存在一定工程风险。本文通过分析岩体裂隙系统发育状况,在W 6危岩单体稳定性研究的基础上,建立了赤平投影法评价危岩体稳定性的判断标准与南门湾危岩体的稳定性分区,提出了对应的防治措施建议。本文的稳定性研究具有一定的理论意义,对该危岩体的防治工程具有指导意义。
Unstable rock blocks are one of the geological natural hazard sources and can have a great influence on human life and engineering activities.The investigation of the unstable rock blocks,the evaluation of their stability and thier prevention measure are difficult tasks.The Nanmenwan unstable rocks have 20 blocks.The controlling design for the unstable rock blocks is very difficult for their complex geological characteristics.In this paper,in order to treat the unstable rock blocks,a stability evaluation criterion for unstable rock blocks at Nanmenwan is established on the basis of the study for the W6 unstable rock block with stereographic projection method.At the same time,the stability zone division at Nanmenwan is carried by the analysis of rock fractures development.At last,the control measures for unstable rock are also proposed for a guiding significance for the project.
Unstable rock blocks are one of the geological natural hazard sources and can have a great influence on human life and engineering activities.The investigation of the unstable rock blocks,the evaluation of their stability and thier prevention measure are difficult tasks.The Nanmenwan unstable rocks have 20 blocks.The controlling design for the unstable rock blocks is very difficult for their complex geological characteristics.In this paper,in order to treat the unstable rock blocks,a stability evaluation criterion for unstable rock blocks at Nanmenwan is established on the basis of the study for the W6 unstable rock block with stereographic projection method.At the same time,the stability zone division at Nanmenwan is carried by the analysis of rock fractures development.At last,the control measures for unstable rock are also proposed for a guiding significance for the project.
引文
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[11]周迎庆,雷明堂,徐金台.四川巫溪南门湾崩塌的形成机制探讨[J].成都地质学院学报,1989,16(1):101~107.Zhou Yingqing,Lei Mingtang,Xu Jintai.The formation mecha-nism of Nanmenwan toppling-slide in Wuxi county,Sichuan.Joural of Chengdu Geology Institute,1989,16(1):101~107.
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[13]重庆市地方标准.地质灾害防治工程设计规范(DB50/5029~2004)[S],2004.Chongqing Local Standard.Design Standard of Geological DisasterPrevention and Control(DB50/5029~2004),2004.
[2]陈洪凯,王蓉,唐红梅.危岩研究现状及趋势综述[J].重庆交通学院学报,2003,22(3):18~22.Chen Hongkai,Wang Rong,Tang Hongmei.Reviewon current situ-ation study and trend of dangerous rock mass.Journal of ChongqingJiaotong University,2003,22(3):18~22.
[3]王在泉,张黎明,贺俊征.岩石边坡工程块体系统稳定性预测、监测和控制[J].岩石力学与工程学报,2004,23(10):1658~1661.Wang Zaiquan,Zhang Liming,He Junzheng.Stability prediction,monitoring and control of key block system in rock slope engineer-ing.Chinese Journal of Rock Mechanics and Engineering,2004,23(10):1658~1661.
[4]陈昌彦,王思敬,沈小克.边坡稳定性的人工神经网络预测模型[J].岩土工程学报,2001,23(2):157~161.Chen Changyan,Wang Sijing,Shen Xiaoke.Predicting models toestimate stability of roc slope based on artificial neural network.Chinese Journal of Geotechnical Engineering,2001,23(2):157~161.
[5]陈洪凯,唐红梅.危岩主控结构面强度参数计算方法[J].工程地质学报,2008,16(1):37~41.Chen Hongkai,Tang Hongmei.Method for calculating strength pa-rameters of structural planes controlling the rock block stability.Journal of Engineering Geology,2008,16(1):37~41.
[6]董好刚,陈立德,黄长生.三峡库区云阳-江津段危岩形成的影响因素及稳定性评价[J].工程地质学报,2010.18(5):645~649.Dong Haogang,Chen Lide,Huang Changsheng.Influence factorsand stability assessment of dangerous rocks in Yunyang-Jiangjin onthree gorges reservoir.Journal of Engineering Geolog,2010.18(5):160~171.
[7]刘传正.重庆武隆鸡尾山危岩体形成与崩塌成因分析[J].工程地质学报,2010.18(3):297~304.Liu Chuanzheng.Mechanism analysis on the Jiweishan rockfall di-sasterhappened in Wulong,Chongqing,June 5,2009.Journal ofEngineering Geology,2010,18(3):297~304.
[8]Aref M,Nei L,Abdo S,et al.Causes of rockfalls in Ai-Huway-shah area,Yemen[J].Global Geology,2009,12(1):5~12.
[9]Cundall P A.Formulation of a three-dimensional distinct elementmodel—PartⅠ:A scheme to detect and represent contacts in asystem composed of many polyhedral blocks[J].InternationalJournal of Rock Mechanics and Mining Science&GeomechanicsAbstract,1988,25(3):107~116.
[10]Hart R,Cundall P A,Lemos J.Formulation of a three dimensionaldiscrete element model—PartⅡ:Mechanical calculation forma-tion and interaction of a system composed of many polyhedralblocks[J].International Journal of Rock Mechanics and MiningScience&Geomechanics Abstract,1988,25(3):117~125.
[11]周迎庆,雷明堂,徐金台.四川巫溪南门湾崩塌的形成机制探讨[J].成都地质学院学报,1989,16(1):101~107.Zhou Yingqing,Lei Mingtang,Xu Jintai.The formation mecha-nism of Nanmenwan toppling-slide in Wuxi county,Sichuan.Joural of Chengdu Geology Institute,1989,16(1):101~107.
[12]石根华.岩体稳定分析的赤平投影方法[J].中国科学,1977,(5):160~171.Shi Genhua.The method of stereographic projection for rock sta-bility.Science in China,1977,(5):160~171.
[13]重庆市地方标准.地质灾害防治工程设计规范(DB50/5029~2004)[S],2004.Chongqing Local Standard.Design Standard of Geological DisasterPrevention and Control(DB50/5029~2004),2004.
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