Displacement back analysis of rock parameters of Hoek-Brown criterion using nonlinear regression method

TIAN Mao-lin; XIAO Hong-tian; YAN Qiang-gang

doi:10.16285/j.rsm.2017.S1.042

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Displacement back analysis of rock parameters of Hoek-Brown criterion using nonlinear regression method

更新时间：2026-06-25

- Displacement back analysis of rock parameters of Hoek-Brown criterion using nonlinear regression method
- Vol. 38, Issue S1, Pages: 343-350(2017)
- 作者机构：
  
  1. 山东科技大学土木工程与建筑学院,山东,青岛,266590
  2. 山东科技大学山东省土木工程防灾减灾重点实验室,山东,青岛,266590
  3. 青岛市勘察测绘研究院,山东,青岛,266555
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.S1.042
  CLC： TU452
- Online First：05 June 2018，
  
  Published：2017
- 稿件说明：
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TIAN Mao-lin, XIAO Hong-tian, YAN Qiang-gang. Displacement back analysis of rock parameters of Hoek-Brown criterion using nonlinear regression method[J]. 2017, 38(S1): 343-350.
DOI：

TIAN Mao-lin, XIAO Hong-tian, YAN Qiang-gang. Displacement back analysis of rock parameters of Hoek-Brown criterion using nonlinear regression method[J]. 2017, 38(S1): 343-350. DOI： 10.16285/j.rsm.2017.S1.042.

摘要

Hoek-Brown准则综合考虑岩体结构、岩块强度等因素，能很好地反映岩体的非线性破坏，更符合工程实际，但其参数选取的主观性及不确定性严重影响其应用效果。通过分析敏感性分析结果及Hoek-Brown准则的圆形硐室围岩位移表达式，借助FLAC3D数值模拟和回归性分析建立了基于Hoek-Brown准则的非线性回归模型，结合差分进化算法提出了合理的位移反分析方法及步骤，并成功应用于青岛地铁工程。结果表明，所建立的非线性回归模型能较好地反映隧道位移与地质强度指标GSI、扰动系数D及泊松比的关系，所提出的位移反分析方法能较准确地反演获得GSI、D、值，由所得反演参数值计算的位移与现场监测位移的相对误差较小，具有良好的一致性，验证了该方法的合理性、准确性，为准确获取Hoek-Brown准则参数提供了新方法。

Abstract

In the Hoek-Brown criterion

many factors affecting rock failures are considered and the nonlinear failure characteristics can be described more accurately. It is known that the uncertainty of rock parameters seriously affects the application of the criterion. Using the sensitivity analysis and the displacement equation of surrounding rocks

the nonlinear regression method(NLRM) has been proposed for the analysis of the rock parameters of the Hoek-Brown criterion. In developing the above mentioned method

the uniform design and FLAC3D software are used. And we develop a reasonable back analysis method and procedures by leading into the differential evolution. The method is successfully used to analyze the stability of the tunnels in Qingdao metro. Results show that the NLRM can better reflect the relationship between the parameters geological strength index(GSI)

agitating coefficient D

Poisson’s ratio and the displacements of tunnels. It can be concluded that the analytical results are very good agreement with the monitoring ones. The proposed method can be used for obtaining the parameters of the Hoek-Brown criterion accurately.

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