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基于广义Hoek-Brown准则的边坡稳定性强度折减法数值分析 被引量:51

Numerical simulation analysis on strength reduction for slope of jointed rock masses based on gereralized Hoek-Brown failure criterion
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摘要 Hoek-Brown屈服准则作为估计完整岩石或节理岩体剪切强度的半经验准则,已成为岩体强度预测及计算领域应用最广泛的准则之一,并在边坡极限平衡法计算中得到了广泛应用,但很少应用于数值模拟计算领域。本文结合工程实例,以广义Hoek-Brown屈服准则建立数值计算模型,并基于强度折减方法计算边坡安全系数,经与等效Mohr-Coulomb屈服准则数值模拟及极限平衡计算对比,得出基于Hoek-Brown屈服准则的模拟计算结果与其它方法一致并且正确的结论。并认为不同屈服准则条件下的边坡潜在滑移面位置及变形特点存在差异,原因在于不同的屈服准则采用了不同的流动法则。与Mohr-Coulomb屈服准则相比,Hoek-Brown屈服准则采用基于应力水平的塑性流动法则更加体现了节理岩体的变形和破坏特点,可有效反映岩体的非线性破坏特征,更加接近工程实际,适于节理岩体的强度计算及稳定性分析。 As a semi-empirical rule for estimating shear strength of integral rock or joint rock masses, the Hock-Brown failure criterion has been one of the most useful criteria in forecast and calculation of rock masses strength. Moreover, it has widely applied in calculation of slope limit equilibrium, but rarely used in numerical simulation calculation. Numerical simulation model was established based on the gereralized Hock-Brown failure criterion, and the factor of safety slope was calculated based on the strength reduction method. Compared with the numerical simulation of equivalent Mohr-Coulomb failure criterion and the calculation of the limit equilibrium, it was concluded that the calculated results based on Hock-Brown failure criterion were similar to those calculated by other methods and because of different flow rules were used in different failure criteria, the position of the sliding surface and the deformation characteristics had some difference under different failure criteria. Compared with the Mohr-Coulomb failure criterion, gereralized Hock-Brown failure criterion could more properly exhibit the deformation and failure characteristics of jointed rock masses as it used plastic flow rule based on stress level. Hock-Brown failure criteria could effectively reflect the nonlinear failure characteristics of rock masses, and it made the calculated results closer to practical situation.
出处 《岩土工程学报》 EI CAS CSCD 北大核心 2006年第11期1975-1980,共6页 Chinese Journal of Geotechnical Engineering
关键词 节理岩体 Hoek—Brown屈服准则 强度折减法 边坡 数值模拟 稳定性分析 安全系数 joint rock masses gereralized Hoek-Brown failure criterion strength reduction method slope numerical simulation stability analysis factor of safety
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参考文献14

  • 1HOEK E,BROWN E T.Empirical strength criterion for rock masses[J].J Geotech Engng Div ASCE,1980,106(GT9):1013–1035.
  • 2HOEK E.Strength of jointed rock masses[J].Géotechnique,1983,33(3):187–223.
  • 3HOEK E,BROWN E T.The Hoek-Brown failure criterion-a 1988 update[C]// Proc 15th Canadian Rock Mech Symp,Toronto,Civil Engineering,University of Toronto,1988:31–38.
  • 4HOEK E,WOOD D,SHAH S.A modified Hoek-Brown criterion for jointed rock masses[C]// Proc Rock Characterization,Symp Int Soc Rock Mech:Eurock 92.London:Brit Geotech Soc,1992:209–213.
  • 5HOEK E.Strength of rock and rock masses[J].ISRM News Journal,1994,2(2):4–16.
  • 6HOEK E,MARINOS P,BENISSI M.Applicability of the geological strength index (GSI) classification for very weak and sheared rock masses[J].The Case of the Athens Schist Formation Bull Engg Geol Env,1998,57(2):151–160.
  • 7HOEK E,CARRANZA-TORRES C,CORKUM B.Hoek-Brown failure criterion-2002 edition[C]// HAMMAH W,BAWDEN J.CURRAN,& M.TELESNICKI,Eds.Proceedings of NARMS-TAC 2002,Mining Innovation and Technology.Toronto:University of Toronto,2002:267–273.
  • 8ROCSCIENCE Inc.Slide:2D limit equilibrium slope stability for soil and rock slopes,Verification Manual[M].Toronto Canada:Rocsience Inc.2003:6–26.
  • 9李培勇,杨庆,栾茂田.Hoek-Brown岩石破坏经验判据确定岩石地基承载力的修正[J].岩土力学,2005,26(4):664-666. 被引量:25
  • 10CARRANZA-TORRES C.Some Comments on the application of the Hoek-Brown failure criterion for intact rock and rck masses to the solution of tunnel and slope problems[C]// BARLA G,BARLA M Eds.MIR 2004-X Conference on Rock and Engineering Mechanics.Torino:Italy Pàtron Editore Bologna,2004:285–326.

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