长江科学院院报 ›› 2014, Vol. 31 ›› Issue (11): 38-41.DOI: 10.3969/j.issn.1001-5485.2014.11.0082014,31(11):38-41,46

• 岩石力学特性与试验 • 上一篇    下一篇

基于Sheorey岩体强度准则推求等效Mohr-Coulomb强度参数

郑星,张胜   

  1. 中国电建集团 贵阳勘测设计研究院,贵阳 550081
  • 收稿日期:2014-08-13 修回日期:2014-11-05 出版日期:2014-11-01 发布日期:2014-11-05
  • 作者简介:郑星(1989-),男,贵州贵阳人,硕士,主要从事水电工程室内岩土试验及科研方面的工作,(电话)13984395774(电子信箱)xingzheng_cool@sina.com。

Estimating Equivalent Mohr-Coulomb Strength Parameters Based on the Sheorey Rock Mass Strength Criterion

ZHENG Xing,ZHANG Sheng   

  1. Power China Guiyang Engineering Corporation, Guiyang 550081, China
  • Received:2014-08-13 Revised:2014-11-05 Online:2014-11-01 Published:2014-11-05

摘要: 引入基于RMR岩体分级指标的Sheorey岩体强度准则,根据σ1-σ3平面上用线性Mohr-Coulomb(M-C)强度准则对非线性准则进行拟合的原则,利用最小二乘法推导出相应的等效M-C强度参数,并给出等效强度参数的通用表达式,方便利用Sheorey准则评价岩体的强度及稳定性。之后,通过一个算例比较了Sheorey准则与Hoek-Brown准则的M-C等效强度参数。分析结果表明,两准则的等效强度参数具有良好的吻合度。

关键词: 岩石力学, Sheorey强度准则, Mohr-Coulomb强度准则, 最小二乘法, 等效强度参数

Abstract: According to the principle of fitting non-linear strength criterion with linear M-C criterion in σ1-σ3 plane, we derived the equivalent M-C strength parameters of the Sheorey strength criterion which is based on the RMR system by use of the least square method. We also present the general formulas of the equivalent M-C strength parameters to be used in the evaluation of strength and stability of rock mass. A calculation example is given to compare the M-C strength parameters between Sheorey criterion and Hoek-Brown criterion. Results reveal that the strength parameters of both criteria are well consistent.

Key words: rock mechanics, Sheorey strength criterion, Mohr-Coulomb criterion, least square method, equivalent strength parameters

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