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作者:

Sun, Zhibin (Sun, Zhibin.) | Wang, Bowen (Wang, Bowen.) | Li, Yongxin (Li, Yongxin.) | Xu, Jingshu (Xu, Jingshu.) | Ji, Jian (Ji, Jian.)

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摘要:

Hoek-Brown (HB) failure criterion is widely used to predict the strength of intact or heavily jointed rock mass. For stability analysis of rock slopes governed by the HB failure criterion, the equivalent linearity to Mohr-Coulomb (MC) criterion is often adopted, leading to the well-known equivalent Mohr-Coulomb method (EMCM). Existing studies on EMCM analysis mainly consider the shear strength of rock material, while consideration of the tensile strength is rare. This contradicts the fact that the underlying tensile strength of rock mass has considerable impact on the rock slope stability in real world. In this regard, this paper proposes a limit analysis-based approach that can account for tension in the threedimensional (3D) stability analysis of HB rock slope. This approach is established on the equivalent linearity of the HB criterion with consideration of tensile strength, known as the equivalent tension cutoff MC method (ETMCM), and using a horn-like 3D mechanism of limit analysis. The safety factor solutions given by the proposed approach are validated by previous studies and numerical results. Parametric studies are conducted to investigate the effect of rock tensile strength on slope stability. Results show that the consideration of tension leads to a more conservative safety factor and a sharper curvature of the failure surface, and these impacts tend to be more obvious with the increases in slope inclination and slope width. Finally, the stability of the HB rock slope under seepage conditions is studied using the proposed approach. The results indicate that the effect of tensile strength is highly remarkable in seepage circumstances. (c) 2023 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

关键词:

Stability analysis Limit analysis Hoek-Brown criterion Rock slope Tensile strength

作者机构:

  • [ 1 ] [Sun, Zhibin]Hefei Univ Technol, Sch Automot & Transportat Engn, Hefei 230009, Peoples R China
  • [ 2 ] [Wang, Bowen]Hefei Univ Technol, Sch Automot & Transportat Engn, Hefei 230009, Peoples R China
  • [ 3 ] [Li, Yongxin]Hefei Univ Technol, Sch Automot & Transportat Engn, Hefei 230009, Peoples R China
  • [ 4 ] [Sun, Zhibin]Hohai Univ, Key Lab Minist Educ Geomech & Embankment Engn, Nanjing 210024, Peoples R China
  • [ 5 ] [Ji, Jian]Hohai Univ, Key Lab Minist Educ Geomech & Embankment Engn, Nanjing 210024, Peoples R China
  • [ 6 ] [Xu, Jingshu]Beijing Univ Technol, Coll Architecture & Civil Engn, Beijing 100124, Peoples R China

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来源 :

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING

ISSN: 1674-7755

年份: 2023

期: 12

卷: 15

页码: 3118-3130

7 . 3 0 0

JCR@2022

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SCOPUS被引频次: 7

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