A-BQ，一种基于BQ的各向异性岩体质量分级系统（英文）

发布时间：2023-03-22 19:48

　　自然界中岩体的力学行为多数表现为各向异性,现有的岩体质量分级方法大多是基于各向同性假设,因此远远难以满足工程要求。本研究在中国岩体质量分级标准BQ的基础上,提出了一种各向异性岩体质量分级系统A-BQ。该系统可用来评估岩体的各向异性程度,同时还可以对各向异性岩体的质量进行评估分级。系统中考虑了岩石的固有各向异性和岩体结构的各向异性,分别采用岩石强度的各向异性和岩体完整性系数的各向异性表征。岩体的各向异性程度通过不同作用方向下岩体的最好与最差质量得分之比确定,并由围岩应力进行调整。基于岩体各向异性结构的产状,结合岩体最好和最差质量得分,可计算各向异性岩体的基本得分,再通过应力状态和地下水因子的校正,获得各向异性岩体的ABQ值,在此基础上将岩体质量分为5级。针对不同岩体质量级别给出了隧道和边坡工程可能的稳定性状态和破坏模式。最后以实际的各向异性岩体隧道和边坡工程为例,对该分级方法进行了应用。

【文章页数】：13 页

【文章目录】：
1 Introduction
2 Approach to propose classification system
3 A-BQ classification system
    3.1 Rating for anisotropy degree
        3.1.1 Inherent strength anisotropy of rock matrix
        3.1.2 Structure anisotropy of rock mass
        3.1.3 Classification of anisotropy degree
    3.2 Quality classification for anisotropic rock mass in engineering
        3.2.1 Tunnel engineering anisotropic rock mass
        3.2.2 Slope engineering anisotropic rock mass
        3.2.3 Quality classification
    3.3 Stability assessment of anisotropic rock mass in engineering
        3.3.1 Stability assessment of tunnel engineering
        3.3.2 Stability assessment of slope engineering
4 Application to case studies
    4.1 Phyllite rock mass tunnel engineering
        4.1.1 Anisotropy degree classification of phyllite rock mass
        4.1.2 Quality classification for Liangshui tunnel engineering
    4.2 Slate rock mass slope engineering
        4.2.1 Anisotropy degree classification of slate rock mass
        4.2.2 Quality classification for Jiujiang quarry slope engineering
5 Concluding remarks
Contributors
Conflict of interest



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