高川陈家坡滑坡的形成机制及稳定性评价
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摘要
在对陈家坡滑坡进行现场地质勘查、现场试验及室内试验的基础上,详细阐述了滑坡基本特征、分析了其形成机制与演化过程。并用极限平衡法和数值模拟法对该滑坡在不同工况下的稳定性进行计算和评价。研究结果表明:天然状态下处于稳定状态,稳定性系数为1.168;暴雨状态下处于欠稳定状态,稳定性系数为1.05;地震状态下(Ⅷ级)处于基本稳定状态,稳定性系数为1.065。两种方法计算滑坡稳定系数结果是基本一致的。
Based on geological investigation,field tests and laboratory tests for Chenjiapo Landslide,the paper elaborated the basic characteristics of landslide,its formation mechanism and evolution.Moreover,the slide stability under different working conditions was calculated and evaluated by limit equilibrium method and numerical simulation.The results show that the landslide is in the steady state under the natural state,and its stability coefficient is 1.168;the landslide is in the less stable state under rainstorm state,and its stability coefficient is 1.05;the landslide is in the basically stable state under seismic loading with magnitude VIII,and its stability coefficients is 1.065.The result of stability coefficients obtained by limit equilibrium method and numerical simulation are mostly consistent.
Based on geological investigation,field tests and laboratory tests for Chenjiapo Landslide,the paper elaborated the basic characteristics of landslide,its formation mechanism and evolution.Moreover,the slide stability under different working conditions was calculated and evaluated by limit equilibrium method and numerical simulation.The results show that the landslide is in the steady state under the natural state,and its stability coefficient is 1.168;the landslide is in the less stable state under rainstorm state,and its stability coefficient is 1.05;the landslide is in the basically stable state under seismic loading with magnitude VIII,and its stability coefficients is 1.065.The result of stability coefficients obtained by limit equilibrium method and numerical simulation are mostly consistent.
引文
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[7]程谦恭,彭建兵.高速岩质滑坡动力学[M].成都:西南交通大学出版社,1999:85-86.(CHENG Qian-gong,PENG Jian-bing.Dynamics for High-speed Rocky Landslide[M].Chengdu:Southwest Jiaotong University Press,1999:85-86.(in Chi-nese))
[8]刘金龙,栾茂田,赵少飞,等.关于强度折减有限元方法中边坡失稳判据的讨论[J].岩土力学,2005,26(8):1345-1348.(LI UJin-long,LUAN Mao-tian,ZHAO Shao-fei,et a1.Discussion onCriteria for Evaluating Stability of Slope in Elastoplastic FEMBased on Shear Strength Reduction Technique[J].Rock andSoil Mechanics,2005,26(8):1345-1348.(in Chinese))
[9]赵尚毅,郑颖人,时为民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.(ZHAOShang-yi,ZHENG Ying-ren,SHl Wei-min,et a1.Analysis onSafety Factor of Slope by Strength Reduction FEM[J].ChineseJournal of Geotechnical Engineering,2002,24(3):343-346.(inChinese))
[10]栾茂田,武亚军,年廷凯.强度折减有限元法中边坡失稳的塑性区判据及其应用[J].防灾减灾工程学报,2003,23(3):2-8.(LUAN Mao-tian,WU Ya-jun,NI AN Ting-kai.A Criterionfor Evaluation Slope Stability Based on Development of PlasticZone by Shear Strength Reduction FEM[J].Journal of Disas-ter Prevention and Mitigation Engineering,2003,23(3):2-8.(in Chinese))
[11]邓建辉,陈菲,尹虎,等.泸定县四湾村滑坡的地质成因与稳定性评价[J].岩石力学与工程学报,2007,26(10):1945-1950.(DENGJian-hui,CHEN Fei,YI N Hu,et a1.Geological Ori-gin and Stability Evaluation of Si wancun Landslide in LudingCounty[J].Chinese Journal of Rock Mechanics and Engineer-ing,2007,26(10):1945-1950.(in Chinese))
[2]胡卸文,黄润秋,施裕兵,等.唐家山滑坡堵江机制及堰塞坝溃坝模式分析[J].岩石力学与工程学报,2009,28(1):181-189.(HU Xie-wen,HUANG Run-qiu,SHI Yu-bing,et al.Analysis ofBlocking River Mechanism of Tangjiashan Landslide and Dam-breaking Mode or its Barrier Dam.[J].Chinese Journal of RockMechanics and Engineering,2009,28(1):181-189.(in Chinese))
[3]崔芳鹏,胡瑞林,谭儒蛟,等.青海八大山滑坡群形成机制及稳定性评价研究[J].岩石力学与工程学报,2008,27(4):848-856.(CUI Fang-peng,HUrui-lin,TAN Ru-jiao,et al.Study onFormation Mechanism and Stability Evaluation of BadashanLandslide Group in Qinghai Province[J].Chinese Journal of RockMechanics and Engineering,2008,27(4):848-856.(in Chinese))
[4]张萍,田斌.滑坡稳定性评价研究进展[J].三峡大学学报(自然科学版),2004,26(3):254-257.(ZHANG Ping,TI AN Bin.Re-search Advance of Evaluation of Landslide Stability[J].Journalof China Three Gorges University(Natural Sciences),2004,26(3):254-257.(in Chinese))
[5]唐秋元.重庆武隆梓桐庙滑坡稳定性影响因素分析[J].岩石力学与工程学报,2004,23(增刊):4502-4505.(Tang Qiu-yuan.Analy-sis on Stability Influencing Factor of Zitongmiao Landslide in Wu-long,Chongqing[J].Chinese Journal of Rock Mechanics and Engi-neering,2004,23(Supp.):4502-4505.(in Chinese))
[6]王福海,王运生,魏鹏,等.四川茂县维城乡后山古滑坡形成机制及稳定性评价[J].南水北调与水利科技,2010,8(1):39-43.(WANG Fu-hai,WANG Yun-sheng,WEI Peng,et al.GeneticMechanismand Stability Evaluation of the Ancient Landslide atHoushan in Weicheng Township,Maoxian County,SichuanProvince[J].South-to-North Water Transfers and Water Sci-ence&Technology,2010,8(1):39-43.(in Chinese))
[7]程谦恭,彭建兵.高速岩质滑坡动力学[M].成都:西南交通大学出版社,1999:85-86.(CHENG Qian-gong,PENG Jian-bing.Dynamics for High-speed Rocky Landslide[M].Chengdu:Southwest Jiaotong University Press,1999:85-86.(in Chi-nese))
[8]刘金龙,栾茂田,赵少飞,等.关于强度折减有限元方法中边坡失稳判据的讨论[J].岩土力学,2005,26(8):1345-1348.(LI UJin-long,LUAN Mao-tian,ZHAO Shao-fei,et a1.Discussion onCriteria for Evaluating Stability of Slope in Elastoplastic FEMBased on Shear Strength Reduction Technique[J].Rock andSoil Mechanics,2005,26(8):1345-1348.(in Chinese))
[9]赵尚毅,郑颖人,时为民,等.用有限元强度折减法求边坡稳定安全系数[J].岩土工程学报,2002,24(3):343-346.(ZHAOShang-yi,ZHENG Ying-ren,SHl Wei-min,et a1.Analysis onSafety Factor of Slope by Strength Reduction FEM[J].ChineseJournal of Geotechnical Engineering,2002,24(3):343-346.(inChinese))
[10]栾茂田,武亚军,年廷凯.强度折减有限元法中边坡失稳的塑性区判据及其应用[J].防灾减灾工程学报,2003,23(3):2-8.(LUAN Mao-tian,WU Ya-jun,NI AN Ting-kai.A Criterionfor Evaluation Slope Stability Based on Development of PlasticZone by Shear Strength Reduction FEM[J].Journal of Disas-ter Prevention and Mitigation Engineering,2003,23(3):2-8.(in Chinese))
[11]邓建辉,陈菲,尹虎,等.泸定县四湾村滑坡的地质成因与稳定性评价[J].岩石力学与工程学报,2007,26(10):1945-1950.(DENGJian-hui,CHEN Fei,YI N Hu,et a1.Geological Ori-gin and Stability Evaluation of Si wancun Landslide in LudingCounty[J].Chinese Journal of Rock Mechanics and Engineer-ing,2007,26(10):1945-1950.(in Chinese))
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