基于广义Hoek-Brown准则强度折减法的岩坡稳定性分析

›› 2008, Vol. 29 ›› Issue (S1): 347-352.

基于广义Hoek-Brown准则强度折减法的岩坡稳定性分析

李远耀，殷坤龙，代云霞

中国地质大学工程学院，武汉 430074

收稿日期:2008-07-25 出版日期:2008-11-11 发布日期:2016-04-15
作者简介:李远耀，男，1978年生，博士研究生，主要从事滑坡机理、岩土稳定性方面的研究。
基金资助:
国家自然科学基金项目（No. 40672187）；湖北省自然科学基金计划青年杰出人才项目（No. 2006ABB030）

Stability analysis of rock slope by strength reduction method based on generalized Hoek-Brown failure criterion

LI Yuan-yao, YIN Kun-long, DAI Yun-xia

Engineering Faculty, China University of Geosciences, Wuhan 430074, China

Received:2008-07-25 Online:2008-11-11 Published:2016-04-15

摘要/Abstract

摘要： 针对岩质高边坡的稳定性分析问题，开展了基于广义Hoek-Brown破坏准则强度折减法的研究。提出了判别强度折减法合理性的两个基本标准：与Mohr-Coulomb准则强度折减法的一致性和能否体现节理岩体的真实破坏特征。基于以上标准，对比了3种不同的基于广义Hoek-Brown破坏准则的强度折减方法：σci、mi，σci、GSI和mi、GSI均同比折减，理论分析表明：mi、GSI同比折减更符合前述标准。最后，通过对工程实例的对比研究，验证了这一结论，并提出mi、GSI同比折减更能体现节理岩体的真实破坏特征，因而其安全系数的计算结果也更加真实可靠。

关键词: 广义Hoek-Brown破坏准则, Mohr-Coulomb破坏准则, 强度折减法, 岩质边坡, 稳定性分析

Abstract: The strength reduction method based on the generalized Hoek-Brown failure criterion is studied. Two basic standards judging the rationality of the strength reduction method are proposed as follows: it coincides with strength reduction method based on the Mohr-Coulomb criterion and represents the real failure characteristics of jointed rock. Based on the two standards, three kinds of strength reduction methods are contrasted by reducing σci and mi , σci and GSI, and mi and GSI with the same factor. Analysis results indicate that the method of reducing mi and GSI with the same factor is more reasonable. Through comparative study of one engineering case, the method of reducing mi and GSI with the same factor can represent real failure characteristic of fractured rock is proved; and then more reliable safety factor during the stability analysis of rock slope is obtained.

Key words: generalized Hoek-Brown failure criterion, Mohr-Coulomb failure criterion, strength reduction method, rock slope, stability analysis

中图分类号:

TU 454

李远耀，殷坤龙，代云霞. 基于广义Hoek-Brown准则强度折减法的岩坡稳定性分析[J]. , 2008, 29(S1): 347-352.

LI Yuan-yao, YIN Kun-long, DAI Yun-xia. Stability analysis of rock slope by strength reduction method based on generalized Hoek-Brown failure criterion[J]. , 2008, 29(S1): 347-352.

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