基于旋转采样法的结构面粗糙度各向异性评价

吴禄祥 吕庆 蔡学桁 郑俊 李博 刘健

吴禄祥, 吕庆, 蔡学桁, 等. 2021. 基于旋转采样法的结构面粗糙度各向异性评价[J]. 工程地质学报, 29(1): 52-58. doi: 10.13544/j.cnki.jeg.2020-091
引用本文: 吴禄祥, 吕庆, 蔡学桁, 等. 2021. 基于旋转采样法的结构面粗糙度各向异性评价[J]. 工程地质学报, 29(1): 52-58. doi: 10.13544/j.cnki.jeg.2020-091
Wu Luxing, Lü Qing, Cai Xueheng, et al. 2021. Anisotropy evaluation of rock joint roughnes using rotation sampling method[J]. Journal of Engineering Geology, 29(1): 52-58. doi: 10.13544/ j.cnki.jeg.2020-091
Citation: Wu Luxing, Lü Qing, Cai Xueheng, et al. 2021. Anisotropy evaluation of rock joint roughnes using rotation sampling method[J]. Journal of Engineering Geology, 29(1): 52-58. doi: 10.13544/ j.cnki.jeg.2020-091

基于旋转采样法的结构面粗糙度各向异性评价

doi: 10.13544/j.cnki.jeg.2020-091
基金项目: 

国家自然科学基金 41772287

国家自然科学基金 41972264

浙江省交通运输厅科技计划项目 2020060

详细信息
    作者简介:

    吴禄祥(1994-),男,硕士生,主要从事岩石结构面粗糙度系数方面的研究. E-mail: wuluxiang@zju.edu.cn

    通讯作者:

    吕庆(1978-),男,博士,教授,博士生导师,主要从事地质灾害、岩石力学方面的教学与科研工作. E-mail: lvqing@zju.edu.cn

  • 中图分类号: TU45

ANISOTROPY EVALUATION OF ROCK JOINT ROUGHNESS USING ROTATION SAMPLING METHOD

Funds: 

the National Natural Science Foundation of China 41772287

the National Natural Science Foundation of China 41972264

the Research Program of Zhejiang Provincial Communication Department 2020060

  • 摘要: 岩石结构面粗糙度各向异性评价存在不确定性。本文基于高精度激光扫描技术获得的结构面三维点云数据,提出了一种评价岩石结构面粗糙度系数(JRC)各向异性的旋转采样法。通过典型结构面试样的对比分析,探讨了采样方法和尺寸对JRC各向异性的影响。结果表明:(1)已有的单一轮廓线采样法获得的JRC各向异性数据离散,各向异性评价结果偏大,增加结构面尺寸,能提高数据的准确性。(2)采用旋转采样法获得的JRC各向异性数据,在不同尺寸下JRC最值分布更集中,各向异性系数计算结果更稳定,克服了JRC数据离散的问题,可获得准确、可靠的JRC各向异性规律。本文方法和结果可为研究岩石结构面粗糙度各向异性规律提供参考。
  • 图  1  岩样结构面点云数据

    Figure  1.  Point cloud data of the rock joint sample

    图  2  单一廓线采样法示意

    Figure  2.  Sampling method using a single joint profile

    图  3  本文提出的旋转采样法

    Figure  3.  The proposed rotation sampling method

    图  4  不同尺寸的采样窗口(10~70 cm)

    Figure  4.  Sampling windows of different sizes

    图  5  单一轮廓线采样法的结果

    Figure  5.  Results using the single profile sampling method

    图  6  旋转采样法的结果

    Figure  6.  Results using the rotation sampling method

    图  7  两种方法获得的JRC最值方向对比

    a. 单一轮廓线采样法;b. 旋转采样法

    Figure  7.  Comparison of JRC extremal directions between two sampling methods

    图  8  不同结构面尺寸对各向异性系数γ的影响

    Figure  8.  The influence of different sampling sizes on the anisotropy coefficient

    图  9  不同结构面尺寸对各向异性系数DAC的影响

    Figure  9.  The influence of different sampling sizes on the anisotropy coefficient

    表  1  单一轮廓线采样法获得的JRC最值及方向

    Table  1.   JRC extremum and directions from single profile sampling method

    尺寸/cm 最大值 方向/(°) 最小值 方向/(°) 极差
    10 11.4 40 6.1 140 5.3
    20 11.4 50 7.3 200 4.1
    30 11.4 60 7.2 190 4.2
    40 11.0 100 7.6 190 3.4
    50 10.9 60 7.9 170 3.0
    60 10.9 100 7.5 170 3.4
    70 11.2 100 7.7 170 3.5
    下载: 导出CSV

    表  2  旋转采样法获得的JRC最值及方向

    Table  2.   JRC extremum and directions from rotation sampling method

    尺寸/cm 最大值 方向/(°) 最小值 方向/(°) 极差
    10 10.1 100 8.3 180 1.8
    20 10.5 90 8.2 190 2.3
    30 11.4 90 8.6 180 2.8
    40 11.4 90 8.7 180 2.7
    50 11.2 90 8.9 180 2.3
    60 10.9 100 8.8 180 2.1
    70 10.8 100 8.8 180 2.0
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-03-28
  • 修回日期:  2020-04-20
  • 刊出日期:  2021-02-01

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