岩体结构控制下的边坡变形破坏模式分析
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摘要
结合某一水电工程,分析坝址区主要II级结构面的特征,指出断层F11和五庙坡断层带(F6、F7、F8)对边坡变形和稳定性起控制作用;通过地质分析概化出考虑主要结构面的三维数值分析模型,研究蓄水工况下边坡岩体的位移和剪应变增量分布特征;根据地质分析和数值模拟结果提出蓄水之后边坡特有的变形破坏模式,上盘岩体沿着断层F11剪切滑动从而挤压五庙坡断层带产生压缩变形。对边坡岩体的主控结构面断层F11和五庙坡断层带应进行必要的防渗和加固处理。
II order discontinuities in dam area of a hydropower project were studied.It is concluded that Fault F11 and Wumiaopo fault zone(F6、F7、F8)control the deformation and stability of the slope.By geological analysis,the three dimensional numerical analysis model considering important discontinuities was built.Distribution characteristics of displacement and shear strain increment of the slope under the condition of impoundment were studied.Based on results of geological analysis and numerical simulation,specific deformation mode of the slope was put forward,the shear sliding of hanging wall along Fault F11 result in extrusion deformation of Wumiaopo fault zone.It is necessary to reinforce and prevent seepage of the discontinuities(Fault F11 and Wumiaopo fault zone) of the slope.
II order discontinuities in dam area of a hydropower project were studied.It is concluded that Fault F11 and Wumiaopo fault zone(F6、F7、F8)control the deformation and stability of the slope.By geological analysis,the three dimensional numerical analysis model considering important discontinuities was built.Distribution characteristics of displacement and shear strain increment of the slope under the condition of impoundment were studied.Based on results of geological analysis and numerical simulation,specific deformation mode of the slope was put forward,the shear sliding of hanging wall along Fault F11 result in extrusion deformation of Wumiaopo fault zone.It is necessary to reinforce and prevent seepage of the discontinuities(Fault F11 and Wumiaopo fault zone) of the slope.
引文
[1]孙广忠.岩体结构力学[M].北京:科学出版社,1988.
[2]孙玉科.工程地质学发展与创新思路探讨之六——《工程地质模型》初论[J].岩土工程界,2003,6(2):27-34.
[3]唐东旗,吴基文,李运成,等.断裂带岩体工程地质力学特征及其对断层防水煤柱留设的影响[J].煤炭学报,2006,31(4):455-460.Tang Dongqi,Wu Jiwen,Li Yuncheng,et al.The features of faultzone rockmass engineering geological mechanics and its effect onleaving fault waterproof pillar[J].Journal of China Coal Society,2006,31(4):455-460.
[4]王中文,方建勤.岩体结构面锚固剪切特性的数值分析[J].煤炭学报,2010,35(5):729-733.Wang Zhongwen,Fang Jianqin.Numerical analysis for the shearcharacteristic of structure plane reinforced by rock bolt in rock mass[J].Journal of China Coal Society,2010,35(5):729-733.
[5]柴波,殷坤龙,陈丽霞,等.岩体结构控制下的斜坡变形特征[J].岩土力学,2009,30(2):521-525.Chai Bo,Yin Kunlong,Chen Lixia,et al.Analysis of slope deforma-tion under control of rock mass structure[J].Rock and Soil Me-chanics,2009,30(2):521-525.
[6]李铁锋,潘懋,刘瑞讯.基岩斜坡岩体变形与破坏的岩体结构模式分析[J].北京大学学报(自然科学版),2002,38(2):239-244.Li Tiefeng,Pan Mao,Liu Ruixun.Analysis of the modes of rock massstruture on slope stability[J].Acta Scientiarum Naturalium Univerr-sitis Pekinensis,2002,38(2):239-244.
[7]杨志法,赵汝斌,王靖,等.安县西部地震次生地质灾害及工程地质力学问题思考[J].岩石力学与工程学报,2008,27(9):1 807-1 813.Yang Zhifa,Zhao Rubin,Wang Jing,et al.Earthquake-induced geo-logical hazards in west of Anxian county and considerations of engi-neering geomechanical problems[J].Chinese Journal of Rock Me-chanics and Engineering,2008,27(9):1 807-1 813.
[8]谷德振.岩体工程地质力学基础[M].北京:科学出版社,1979.
[9]李毓瑞,古迅,宋玉环.谷德振文集[M].北京:地震出版社,1994:262-263.
[10]孙广忠.岩体力学基础[M].北京:科学出版社,1983.
[2]孙玉科.工程地质学发展与创新思路探讨之六——《工程地质模型》初论[J].岩土工程界,2003,6(2):27-34.
[3]唐东旗,吴基文,李运成,等.断裂带岩体工程地质力学特征及其对断层防水煤柱留设的影响[J].煤炭学报,2006,31(4):455-460.Tang Dongqi,Wu Jiwen,Li Yuncheng,et al.The features of faultzone rockmass engineering geological mechanics and its effect onleaving fault waterproof pillar[J].Journal of China Coal Society,2006,31(4):455-460.
[4]王中文,方建勤.岩体结构面锚固剪切特性的数值分析[J].煤炭学报,2010,35(5):729-733.Wang Zhongwen,Fang Jianqin.Numerical analysis for the shearcharacteristic of structure plane reinforced by rock bolt in rock mass[J].Journal of China Coal Society,2010,35(5):729-733.
[5]柴波,殷坤龙,陈丽霞,等.岩体结构控制下的斜坡变形特征[J].岩土力学,2009,30(2):521-525.Chai Bo,Yin Kunlong,Chen Lixia,et al.Analysis of slope deforma-tion under control of rock mass structure[J].Rock and Soil Me-chanics,2009,30(2):521-525.
[6]李铁锋,潘懋,刘瑞讯.基岩斜坡岩体变形与破坏的岩体结构模式分析[J].北京大学学报(自然科学版),2002,38(2):239-244.Li Tiefeng,Pan Mao,Liu Ruixun.Analysis of the modes of rock massstruture on slope stability[J].Acta Scientiarum Naturalium Univerr-sitis Pekinensis,2002,38(2):239-244.
[7]杨志法,赵汝斌,王靖,等.安县西部地震次生地质灾害及工程地质力学问题思考[J].岩石力学与工程学报,2008,27(9):1 807-1 813.Yang Zhifa,Zhao Rubin,Wang Jing,et al.Earthquake-induced geo-logical hazards in west of Anxian county and considerations of engi-neering geomechanical problems[J].Chinese Journal of Rock Me-chanics and Engineering,2008,27(9):1 807-1 813.
[8]谷德振.岩体工程地质力学基础[M].北京:科学出版社,1979.
[9]李毓瑞,古迅,宋玉环.谷德振文集[M].北京:地震出版社,1994:262-263.
[10]孙广忠.岩体力学基础[M].北京:科学出版社,1983.
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