地震作用下边坡稳定性安全评价的研究
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摘要
地震作用下边坡的失稳机理、稳定性评价是一个很复杂的问题,国内学者对地震边坡稳定性评价指标安全系数进行了研究,但是以目前的研究现状,还无法对地震作用下的边坡稳定性进行准确恰当的评价。文章分析了目前主要的地震边坡稳定性评价方法的优缺点,并采用这些评价方法对两个边坡算例进行了分析,算例分析表明:各种评价方法给出的稳定性系数不同,同种工况下边坡稳定性程度也不同,不利于工程实际应用,说明提出准确、合理的地震边坡稳定性评价方法和建立统一的评价标准的必要性,最后对地震边坡稳定性评价进行了展望。
The failure mechanism and stability safety evaluation of slope under earthquake is a complex problem. The domestic scholars have studied the safety factor slope seismic stability evaluation index,however,by now it's difficult to evaluate the slope seismic stability accurately.This paper analyses the excellence and disadvantage of the slope's stability evaluation methods under earthquake,and examples are analyzed using those methods to show that: Different evaluation method gives different stability safety factor and different slope stability degree,which result in their inconvenient application in engineering.So it' s necessary to put forward accurate seismic slope stability evaluation method and set up unified slope seismic stability evaluation standard.Finally,the seismic slope's stability evaluation in future is prospected.
The failure mechanism and stability safety evaluation of slope under earthquake is a complex problem. The domestic scholars have studied the safety factor slope seismic stability evaluation index,however,by now it's difficult to evaluate the slope seismic stability accurately.This paper analyses the excellence and disadvantage of the slope's stability evaluation methods under earthquake,and examples are analyzed using those methods to show that: Different evaluation method gives different stability safety factor and different slope stability degree,which result in their inconvenient application in engineering.So it' s necessary to put forward accurate seismic slope stability evaluation method and set up unified slope seismic stability evaluation standard.Finally,the seismic slope's stability evaluation in future is prospected.
引文
[1]杨全忠.西藏滑坡地质灾害及防治对策[J].中国地质灾害与防治学报,2002,13(1):94-97.(YANG Quan-zhong.Landslide and Its Prevention and Control in Tibet[J].The Chinese Journal of Geological Hazard and Control,2002,13(1):94-97.(in Chinese))
[2]林成功.台湾921集集大地震滑坡动力分析研究[D].重庆:重庆大学,2003.(LIN Cheng-gong.A Study on the Dynamic of Slope Stability At the 921 chi- Chi Earthquake in Taiwan[D].Chongqing:Chongqing University,2003.(in Chinese))
[3]刘汉龙,费康,高玉峰.边坡地震稳定性时程分析方法[J].岩土力学,2003,24(4):553-556.(LIU Hanlong, FEI Kang,GAO Yu-feng.Time History Analysis Method of Slope Seismic Stability[J].Rock and Soil Mechanics,2003,24(4):553-556.(in Chinese))
[4]Newmark N.M.Effects of earthquakes on dams and embankments [J].Geotechnique,1965,15(2):139- 160.
[5]TerzaghiK.Mechanisms of landslides,Engineering Geology (Berdey)Volume[M]Geological Society of America, 1950.
[6]GB50011-2001,《建筑抗震设计规范》[S]. (GB5001 1-2001,Code for Seismic Design of Buildings. (in Chinese))
[7]SL203-97,《水工建筑物抗震设计规范》[S].( SL203-97,Specifications for Seismic Design of Hydraulic Structures[S].(in Chinese))
[8]JTJ004-89,《公路工程抗震设计规范》[S]. (JTJ004-89,Code for Seismic Design of Highway Engineering. (in Chinese))
[9]苏超,李俊宏,任青文.有限单元法在高拱坝坝肩动力稳定分析中的应用[J].河海大学学报(自然科学版),2003,31(2):144-147.(SU Chao,LI Jun-hong, REN Qing-wen.FEM-based dynamic stability analysis of abutment for high arch dams[J].Journal of Hehai University (Natural Sciences),2003,31(2):144-147. (in Chinese))
[10]张伯艳,陈厚群,杜修力,等.拱坝坝肩抗震稳定分析[J].水利学报,2000,(11):55-59.(ZHANG Boyan, CHEN Hou-qun,DU Xiu-li,et al.Arch Dam Abutment Aseismic stability analysis[J].Journal of Hydraulic Engineering,2000,(11):55-59.(in Chinese))
[11]薄景山.三峡重庆库区区域滑坡灾害的综合研究报告[R].哈尔滨:中国地震局工程力学研究所,2003. (BO Jing-shan.The compositive research report of three gorge Chongqing reservoir area slide slope disaster [R].Harbin:Institute of Engineering Mechanics, China Seismological Bureau,2003.(in Chinese))
[12]李育枢,高广运,李天斌.偏压隧道洞口边坡地震动力反应及稳定性分析[J].地下空间与工程学报, 2006,2(5):738-743.(LI Yu-shu,GAO Guangyun, LI Tian-bin.Analysis of Earthquake Response and Stability Evaluation for Transverse Slope at Secund Tunnel Porta[J].Chinese Journal of Underground Space and Engineering,2006,2(5):738-743.(in Chinese))
[13]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报, 2007,26(12),2 385-2394.(LI Hai-bo,XIAO Keqiang, LIU Ya-qun.Factor of Safety Analysis of Bedding Rock Slope Under Seismic Load[J].Chinese Journal of Rock Mechanics and Engineering,2007,26 (12),2385-2394.(in Chinese))
[14]戴妙林,李同春.基于降强法数值计算的复杂岩质边坡动力稳定性安全评价[J].岩石力学与工程学报,2007,26(suppl):2749-2754.(DAI Miao-lin, LI Tong-chun.Analysis of Dynamic Stability Safety Evaluation for Complex Rock Slopes by Rtrength Reduction Numerical Method[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(suppl),2749 -2754.(in Chinese))
[15]Dawson EM,Roth WH,Drescher A.Slope stability analysis by strength reduction.Geotechnique,1999,49 (6):835-40.
[2]林成功.台湾921集集大地震滑坡动力分析研究[D].重庆:重庆大学,2003.(LIN Cheng-gong.A Study on the Dynamic of Slope Stability At the 921 chi- Chi Earthquake in Taiwan[D].Chongqing:Chongqing University,2003.(in Chinese))
[3]刘汉龙,费康,高玉峰.边坡地震稳定性时程分析方法[J].岩土力学,2003,24(4):553-556.(LIU Hanlong, FEI Kang,GAO Yu-feng.Time History Analysis Method of Slope Seismic Stability[J].Rock and Soil Mechanics,2003,24(4):553-556.(in Chinese))
[4]Newmark N.M.Effects of earthquakes on dams and embankments [J].Geotechnique,1965,15(2):139- 160.
[5]TerzaghiK.Mechanisms of landslides,Engineering Geology (Berdey)Volume[M]Geological Society of America, 1950.
[6]GB50011-2001,《建筑抗震设计规范》[S]. (GB5001 1-2001,Code for Seismic Design of Buildings. (in Chinese))
[7]SL203-97,《水工建筑物抗震设计规范》[S].( SL203-97,Specifications for Seismic Design of Hydraulic Structures[S].(in Chinese))
[8]JTJ004-89,《公路工程抗震设计规范》[S]. (JTJ004-89,Code for Seismic Design of Highway Engineering. (in Chinese))
[9]苏超,李俊宏,任青文.有限单元法在高拱坝坝肩动力稳定分析中的应用[J].河海大学学报(自然科学版),2003,31(2):144-147.(SU Chao,LI Jun-hong, REN Qing-wen.FEM-based dynamic stability analysis of abutment for high arch dams[J].Journal of Hehai University (Natural Sciences),2003,31(2):144-147. (in Chinese))
[10]张伯艳,陈厚群,杜修力,等.拱坝坝肩抗震稳定分析[J].水利学报,2000,(11):55-59.(ZHANG Boyan, CHEN Hou-qun,DU Xiu-li,et al.Arch Dam Abutment Aseismic stability analysis[J].Journal of Hydraulic Engineering,2000,(11):55-59.(in Chinese))
[11]薄景山.三峡重庆库区区域滑坡灾害的综合研究报告[R].哈尔滨:中国地震局工程力学研究所,2003. (BO Jing-shan.The compositive research report of three gorge Chongqing reservoir area slide slope disaster [R].Harbin:Institute of Engineering Mechanics, China Seismological Bureau,2003.(in Chinese))
[12]李育枢,高广运,李天斌.偏压隧道洞口边坡地震动力反应及稳定性分析[J].地下空间与工程学报, 2006,2(5):738-743.(LI Yu-shu,GAO Guangyun, LI Tian-bin.Analysis of Earthquake Response and Stability Evaluation for Transverse Slope at Secund Tunnel Porta[J].Chinese Journal of Underground Space and Engineering,2006,2(5):738-743.(in Chinese))
[13]李海波,肖克强,刘亚群.地震荷载作用下顺层岩质边坡安全系数分析[J].岩石力学与工程学报, 2007,26(12),2 385-2394.(LI Hai-bo,XIAO Keqiang, LIU Ya-qun.Factor of Safety Analysis of Bedding Rock Slope Under Seismic Load[J].Chinese Journal of Rock Mechanics and Engineering,2007,26 (12),2385-2394.(in Chinese))
[14]戴妙林,李同春.基于降强法数值计算的复杂岩质边坡动力稳定性安全评价[J].岩石力学与工程学报,2007,26(suppl):2749-2754.(DAI Miao-lin, LI Tong-chun.Analysis of Dynamic Stability Safety Evaluation for Complex Rock Slopes by Rtrength Reduction Numerical Method[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(suppl),2749 -2754.(in Chinese))
[15]Dawson EM,Roth WH,Drescher A.Slope stability analysis by strength reduction.Geotechnique,1999,49 (6):835-40.
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