Hoek-Brown准则的改进及在大光包滑坡滑带碎裂岩体力学强度评价中的应用

doi:10.13722/j.cnki.jrme.2016.0559

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摘要

针对目前大光包滑坡滑带碎裂岩体力学强度参数缺乏研究这一问题，提出基于改进后的Hoek-Brown准则获取岩体力学强度参数的新方法。该方法首先通过岩体基本质量指标BQ、岩体结构等级SR、结构面表面等级SCR与结构面条件因子J_c分别对地质强度指标GSI进行量化取值；在此基础上，建立由岩体基本质量指标BQ估算扰动参数D的计算公式；并以现场调查和室内岩石力学试验为基础，将改进后的方法代入Hoek-Brown准则中，对大光包滑坡滑带碎裂岩体的力学强度参数进行评价。与E. Hoek建议法相比，改进后的方法获取的岩体力学参数偏小，更为接近前人研究中的建议值，证明该方法具有一定的合理性。

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	冯文凯
	王琦
	张光鑫
	刘志刚
	易小宇

关键词 ：边坡工程, 大光包滑坡, 碎裂岩体, 力学强度参数, Hoek-Brown准则

Abstract：

Aiming at lack study for mechanical parameters of cataclastic rock mass in sliding zone of Daguangbao landslide，a new method for obtaining mechanical parameters of rock mass is proposed based on the improved Hoek-Brown criterion. Firstly，the value of geological strength index GSI should be quantized by rock mass basic quality index BQ，surface rating SR，surface condition rate SCR and joint condition factor J_c. On this basis，an improved formula of disturbance factor D through rock mass basic quality index BQ was established. By field investigation and laboratory test of rock mechanics，the improved method is substituted into Hoek-brown criterion，and then the mechanical parameters of cataclastic rock mass in sliding zone of Daguangbao landslide is evaluated. Compared with the E. Hoek method，the mechanical parameters of rock mass obtained by the improved method are relatively small，which is closed to the previous suggestions. It proved that this method has a definite rationality.

Key words： slope engineering Daguangbao landslide cataclastic rock mass mechanical strength parameters of rock mass Hoek-Brown criterion

引用本文:

冯文凯，王琦，张光鑫，刘志刚，易小宇. Hoek-Brown准则的改进及在大光包滑坡滑带碎裂岩体力学强度评价中的应用[J]. 岩石力学与工程学报, 2017, 36(S1): 3448-3455.
FENG Wenkai，WANG Qi，ZHANG Guangxin，LIU Zhigang，YI Xiaoyu. Improved Hoek-Brown criterion and application of landslide zone of cataclastic rock mass mechanical strength in evaluation of Daguangbao landslide. , 2017, 36(S1): 3448-3455.

链接本文:

https://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2016.0559 或 https://rockmech.whrsm.ac.cn/CN/Y2017/V36/IS1/3448

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