雅砻江锦屏一级水电站坝区右岸高位边坡危岩体稳定性研究
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摘要
通过现场调查分析,将危岩概括为4种失稳模式:整体滑移剪切破坏模式、块体崩滑破坏模式、整体剪切错落破坏模式、压缩-拉裂-滑移破坏模式。根据极限平衡原理,针对不同的失稳模式提出不同的稳定性计算方法和稳定状态分类指标,并对不同规模和不同稳定状态下的危岩提出相应的防治措施。
A lot of investigation shows that these unstable rock masses can be classified into four failure modes: whole slide shear failure mode;rock block landslide failure mode;whole shear fall failure mode;compress-rip-slide failure mode.Unload cracks of forming unstable rock masses failure boundary don′t store water usually;so the main loads to cause unstable rock masses failing in dam region are weight of unstable rocks,eismic load.There are two types of load combination,the first one is only weight,the second one is weight and seismic load.According to limit equilibrium theory,the authors put forward different calculation methods of stability and criterion of stability state class for different failure mode.The limit equilibrium theory not only emphasizes that correlative intensity parameters must be exact,and correctly measure geometry parameters of unstable rock massest;he latter are commonly difficult,utilizing the measuring technique of three laser scan to get these credible geometry parameters.The authors put forward corresponding measures of prevention and monitoring unstable rock masses of different scales and stability states too.
A lot of investigation shows that these unstable rock masses can be classified into four failure modes: whole slide shear failure mode;rock block landslide failure mode;whole shear fall failure mode;compress-rip-slide failure mode.Unload cracks of forming unstable rock masses failure boundary don′t store water usually;so the main loads to cause unstable rock masses failing in dam region are weight of unstable rocks,eismic load.There are two types of load combination,the first one is only weight,the second one is weight and seismic load.According to limit equilibrium theory,the authors put forward different calculation methods of stability and criterion of stability state class for different failure mode.The limit equilibrium theory not only emphasizes that correlative intensity parameters must be exact,and correctly measure geometry parameters of unstable rock massest;he latter are commonly difficult,utilizing the measuring technique of three laser scan to get these credible geometry parameters.The authors put forward corresponding measures of prevention and monitoring unstable rock masses of different scales and stability states too.
引文
[1]王士天,黄润秋,李渝生,等.雅砻江锦屏水电站重大工程地质问题研究[M].成都:成都科技大学出版社,1998.(WANG Shitian,HUANG Runqiu,LI Yusheng,et al.A study on the key engineering geological problems at Jinping Hydropower Station,Yalong River[M].Chengdu:Chengdu University of Science and Technology Press,1998.(in Chinese))
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[8]肖树芳,杨淑碧.岩体力学[M].北京:地质出版社,1987.(XIAO Shufang,YANG Shubi.Rock masses mechanics[M].Beijing:Geological Publishing House,1987.(in Chinese))
[9]闫莫明,徐祯祥,苏自约.岩土锚固技术手册[M].北京:人民交通出版社,2004.(YAN Moming,XU Zhenxiang,SU Ziyue.Geotechnique anchor manual[M].Beijing:China Communications Press,2004.(in Chinese))
[10]国家地震局地质研究所.四川雅砻江锦屏水电站地震安全性评价报告[R].北京:国家地震局地质研究所,1993.(Institute of Geology,China Earthquake Administration.The earthquake security evaluation report of Jinping Hydropower Station,Yalong River[R].Beijing:Institute of Geology,China Earthquake Administration,1993.(in Chinese))
[2]夏红萤,董孝璧,沈军辉.锦屏I级水电站开挖边坡三维有限元分析[J].铀矿地质,2004,20(3):183-187.(XIA Hongying,DONG Xiaobi,SHEN Junhui.Analysis of stability of the spandrel groove high slope of Jinping I Hydropower Station using three-dimensional finite element method[J].Uranium Geology,2004,20(3):183-187.(in Chinese))
[3]黄润秋,王士天,张倬元,等.中国西南地壳浅表层动力学过程与工程环境效应研究[M].成都:四川大学出版社,2002.(HUANG Runqiu,WANG Shitian,ZHANG Zhuoyuan,et al.Epigentical process of the earth crust in southwestern china and engineering environmental effects[M].Chengdu:Sichuan University Press,2002.(in Chinese))
[4]黄润秋.中国西部地区典型岩质滑坡机制研究[J].地球科学进展,2004,19(3):443-450.(HUANG Runqiu.Mechanism of large-scale landslides in Western China[J].Advance in Earth Sciences,2004,19(3):443-450.(in Chinese))
[5]黄润秋.中国西南岩石高边坡的主要特征及演化[J].地球科学进展,2005,20(3):292-297.(HUANG Runqiu.Main characteristics of high rock slopes in Southwestern China and their dynamic evolution[J].Advance in Earth Sciences,2005,20(3):292-297.(in Chinese))
[6]张倬元,王士天,王兰生.工程地质分析原理[M].北京:地质出版社,1994.(ZHANG Zhuoyuan,WANG Shitian,WANG Lansheng.Principles of engineering geology[M].Beijing:Geological Publishing House,1994.(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.(CHEN Hongkai,TANG Hongmei,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]肖树芳,杨淑碧.岩体力学[M].北京:地质出版社,1987.(XIAO Shufang,YANG Shubi.Rock masses mechanics[M].Beijing:Geological Publishing House,1987.(in Chinese))
[9]闫莫明,徐祯祥,苏自约.岩土锚固技术手册[M].北京:人民交通出版社,2004.(YAN Moming,XU Zhenxiang,SU Ziyue.Geotechnique anchor manual[M].Beijing:China Communications Press,2004.(in Chinese))
[10]国家地震局地质研究所.四川雅砻江锦屏水电站地震安全性评价报告[R].北京:国家地震局地质研究所,1993.(Institute of Geology,China Earthquake Administration.The earthquake security evaluation report of Jinping Hydropower Station,Yalong River[R].Beijing:Institute of Geology,China Earthquake Administration,1993.(in Chinese))
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