危岩稳定性计算新体系
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摘要
地质灾害防治研究中,危岩的研究相对较为薄弱,稳定性计算模型体系不够完善。本文在五个常用计算模型的基础上,增加了后缘有贯通陡倾裂隙的滑移式、双结构面滑移式、后缘无陡倾裂隙且形似悬臂梁的坠落式、上缘岩体抗拉强度控制的坠落式四个新的计算模型,形成了危岩稳定性计算模型新体系。依托工程实例对后缘有贯通陡倾裂隙的滑移式危岩新计算模型的稳定性进行运用验证,即:基于刚体力学的极限平衡法计算求出不同工况下危岩单体的稳定性系数,再基于FLAC3D运用摩尔-库伦模型对该危岩单体进行数值模拟,计算求出其在两种不同工况的稳定系数,两种方法相互印证其可靠性。
In research of geological hazards,less work has been made on dangerous mass,and there is no complete calculation system for rock stability. This work attempts to solve this problem. Based on five common models,we propose four new models which are for distinct slope failures: rock slide from a back scarp with connected steep cracks,rock slide on a double structural surface,rock fall from a back scarp like a cantilever without steep cracks,and rock fall from a upper scarp dependent on tensile strength. These four models constitute a new system for calculation of slope stability. Of them,the first model is verified using a project example. In this case analysis,firstly the stability coefficients of a single rock mass are worked out for different conditions using the limit balance method that is based on mechanics of rigid bodies. Then simulation is performed in terms of FLAC3 D on a Mohr-Coulomb model to calculate the stability coefficients for two conditions. The results from these two approaches are identical,indicating that this model is reliable.
In research of geological hazards,less work has been made on dangerous mass,and there is no complete calculation system for rock stability. This work attempts to solve this problem. Based on five common models,we propose four new models which are for distinct slope failures: rock slide from a back scarp with connected steep cracks,rock slide on a double structural surface,rock fall from a back scarp like a cantilever without steep cracks,and rock fall from a upper scarp dependent on tensile strength. These four models constitute a new system for calculation of slope stability. Of them,the first model is verified using a project example. In this case analysis,firstly the stability coefficients of a single rock mass are worked out for different conditions using the limit balance method that is based on mechanics of rigid bodies. Then simulation is performed in terms of FLAC3 D on a Mohr-Coulomb model to calculate the stability coefficients for two conditions. The results from these two approaches are identical,indicating that this model is reliable.
引文
ANCOLD.2003.Guideline on risk assessment[C].Tatura:Australian National Committee on Large Dams:24-30
Chen Hong-kai,Tang Hong-ming,Ye Si-qiao,Zhu Hui.2006.The principle of prevention of the dangerous rock[M].Beijing:Seismological Press:1-180(in Chinese with English abstract)
Chen Hong-kai,Tang Hong-mei,Wang Rong.2004.The stability calculation method and application in Three Gorges Reservoir area[J].Chinese Journal of Rock Mechanics and Engineering,23(4):614-619(in Chinese with English abstract)
Chen Hong-kai,Xian Xue-fu,Tang Hong-mei.2009a.Dangerous rock stability analysis method[J].Chinese Journal of Applied Mechanics,26(2):278-828(in Chinese with English abstract)
Chen Hong-kai,Xian Xue-fu,Tang Hong-mei.2009b.Stability analysis method for perilous rock by fracture mechanics[J].Journal of Chongqing University:Natural Science Edition,32(4):434-437(in Chinese with English abstract)
Chen Hong-kai,Tang Hong-mei,Ye si-qiao.2006.Research on damage model of control fissure in perilous rock[J].Applied Mathematics and Mechanics,27(7):967-974
Chen Hong-kai,Tang Hong-mei,Wang Rong.2001.Research on equivalent processes of rock mass parameters with anchor pile[J].Applied Mathematics and Mechanics,22(8):965-971
Chen Yu-min,Xu Ding-ping.2013.FLAC/FLAC3D foundation and engineering example[M].Beijing:Water Conservancy and Hydropower Press:1-448(in Chinese)
Duncan J M.1996.State of the art:Limit equilibrium and finite element analysis of slope[J].Journal of Geotechnical and Eoenvironmental Engineering.ASCE,122(7):577-589(in Chinese with English abstract)
ERM-Hong Kong.1998.Landslides and boulder falls from natural terrain:Interim risk guidelines[R].Hong Kong:Geotechnical Engineering Office:1-15(in Chinese with English abstract)
Hoek E,Bray J W.1977.Rock Slope Engineering[M].London:The institution of Mining and Metallurgy:1-431
Hu Hou-tian.2001.The forecast of the slope geologic hazard[M].Chengdu:Southwest Jiaotong University Press:1-28(in Chinese with English abstract)
Corominas J,Copons R,eM oyal J.2005.Quantitative assessment of the residual risk in a rockfall protected area[J].Landslides,(2):343-257
Lterman A Z.Karal F C.1968.Propagation of elastic waves in layered media by finite-difference methods[J].Bulletin of the Seismological Society of America,58(1):367-398
Perez-Ruiz J A.2005.Simulation of an irregular free surface with a displacement finite-difference scheme[J].Bulletin of the Seismological Society of Americal,95(6):2216-2231
The provincial standard of Chongqing City.2003.The standard of code for geological hazard prevention and engineering investigation[S].Chongqing:Chongqing Bureau of Quality and Technology Supervision:21-33(in Chinese)
Tang Hong-mei.2005.Numerical simulation study on design condition o collapse dangerous rock control[J].Journal of Chongqing University,24(10):62-65(in Chinese with English abstract)
Zeng Lian.1990.Collapse and prevention[M].Chengdu:Southwest Jiaotong University Press:1-55(in Chinese with English abstract)
Zhao Shang-yi,Zheng Ying-ren,Shi Wei-min.2002.Application of finite element strength reduction method to slope stability safety factor[J].Journal of Geotechnical Engineering,5(3):343-346(in Chinese with English abstract)
陈洪凯,唐红梅,叶四桥,祝辉.2006.危岩防治原理[M].北京:地震出版社:1-180
陈洪凯,唐红梅,王蓉.2004.三峡库区危岩体稳定性计算方法及应用[J].岩岩石力学与工程学报,23(4):614-619
陈洪凯,鲜学福,唐红梅.2009a.危岩稳定性分析方法[J].应用力学学报,26(2):278-281
陈洪凯,鲜学福,唐红梅.2009b.危岩稳定性断裂力学计算方法[J].重庆大学学报,32(4):434-437,452
陈育民,徐鼎平.2013.FLAC/FLAC3D基础与工程实例[M].北京:水利水电出版社:1-448
重庆市地方标准.2003.地质灾害防治工程勘察规范[S].重庆:重庆市质量技术监督局:21-33
胡厚田.2001.边坡地质灾害的预测预报[M].成都:西南交通大学出版社:1-28
唐红梅.2005.滑塌式危岩控制设计工况数值模拟研究[J].重庆交通学院学报,24(10):62-65
曾廉.1990.崩塌与防治[M].成都:西南交通大学出版社:1-55
赵尚毅,郑颖人,时卫民.2002.利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,5(3):343-346
Chen Hong-kai,Tang Hong-ming,Ye Si-qiao,Zhu Hui.2006.The principle of prevention of the dangerous rock[M].Beijing:Seismological Press:1-180(in Chinese with English abstract)
Chen Hong-kai,Tang Hong-mei,Wang Rong.2004.The stability calculation method and application in Three Gorges Reservoir area[J].Chinese Journal of Rock Mechanics and Engineering,23(4):614-619(in Chinese with English abstract)
Chen Hong-kai,Xian Xue-fu,Tang Hong-mei.2009a.Dangerous rock stability analysis method[J].Chinese Journal of Applied Mechanics,26(2):278-828(in Chinese with English abstract)
Chen Hong-kai,Xian Xue-fu,Tang Hong-mei.2009b.Stability analysis method for perilous rock by fracture mechanics[J].Journal of Chongqing University:Natural Science Edition,32(4):434-437(in Chinese with English abstract)
Chen Hong-kai,Tang Hong-mei,Ye si-qiao.2006.Research on damage model of control fissure in perilous rock[J].Applied Mathematics and Mechanics,27(7):967-974
Chen Hong-kai,Tang Hong-mei,Wang Rong.2001.Research on equivalent processes of rock mass parameters with anchor pile[J].Applied Mathematics and Mechanics,22(8):965-971
Chen Yu-min,Xu Ding-ping.2013.FLAC/FLAC3D foundation and engineering example[M].Beijing:Water Conservancy and Hydropower Press:1-448(in Chinese)
Duncan J M.1996.State of the art:Limit equilibrium and finite element analysis of slope[J].Journal of Geotechnical and Eoenvironmental Engineering.ASCE,122(7):577-589(in Chinese with English abstract)
ERM-Hong Kong.1998.Landslides and boulder falls from natural terrain:Interim risk guidelines[R].Hong Kong:Geotechnical Engineering Office:1-15(in Chinese with English abstract)
Hoek E,Bray J W.1977.Rock Slope Engineering[M].London:The institution of Mining and Metallurgy:1-431
Hu Hou-tian.2001.The forecast of the slope geologic hazard[M].Chengdu:Southwest Jiaotong University Press:1-28(in Chinese with English abstract)
Corominas J,Copons R,eM oyal J.2005.Quantitative assessment of the residual risk in a rockfall protected area[J].Landslides,(2):343-257
Lterman A Z.Karal F C.1968.Propagation of elastic waves in layered media by finite-difference methods[J].Bulletin of the Seismological Society of America,58(1):367-398
Perez-Ruiz J A.2005.Simulation of an irregular free surface with a displacement finite-difference scheme[J].Bulletin of the Seismological Society of Americal,95(6):2216-2231
The provincial standard of Chongqing City.2003.The standard of code for geological hazard prevention and engineering investigation[S].Chongqing:Chongqing Bureau of Quality and Technology Supervision:21-33(in Chinese)
Tang Hong-mei.2005.Numerical simulation study on design condition o collapse dangerous rock control[J].Journal of Chongqing University,24(10):62-65(in Chinese with English abstract)
Zeng Lian.1990.Collapse and prevention[M].Chengdu:Southwest Jiaotong University Press:1-55(in Chinese with English abstract)
Zhao Shang-yi,Zheng Ying-ren,Shi Wei-min.2002.Application of finite element strength reduction method to slope stability safety factor[J].Journal of Geotechnical Engineering,5(3):343-346(in Chinese with English abstract)
陈洪凯,唐红梅,叶四桥,祝辉.2006.危岩防治原理[M].北京:地震出版社:1-180
陈洪凯,唐红梅,王蓉.2004.三峡库区危岩体稳定性计算方法及应用[J].岩岩石力学与工程学报,23(4):614-619
陈洪凯,鲜学福,唐红梅.2009a.危岩稳定性分析方法[J].应用力学学报,26(2):278-281
陈洪凯,鲜学福,唐红梅.2009b.危岩稳定性断裂力学计算方法[J].重庆大学学报,32(4):434-437,452
陈育民,徐鼎平.2013.FLAC/FLAC3D基础与工程实例[M].北京:水利水电出版社:1-448
重庆市地方标准.2003.地质灾害防治工程勘察规范[S].重庆:重庆市质量技术监督局:21-33
胡厚田.2001.边坡地质灾害的预测预报[M].成都:西南交通大学出版社:1-28
唐红梅.2005.滑塌式危岩控制设计工况数值模拟研究[J].重庆交通学院学报,24(10):62-65
曾廉.1990.崩塌与防治[M].成都:西南交通大学出版社:1-55
赵尚毅,郑颖人,时卫民.2002.利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,5(3):343-346