孙琦, 张文, 赵云鹏, 等. 2021.高陡岩质斜坡结构面的无人机贴近采集与粗糙度分析[J].工程地质学报, 29(5): 1460- 1468. doi: 10.13544/j.cnki.jeg.2021-0406.
    引用本文: 孙琦, 张文, 赵云鹏, 等. 2021.高陡岩质斜坡结构面的无人机贴近采集与粗糙度分析[J].工程地质学报, 29(5): 1460- 1468. doi: 10.13544/j.cnki.jeg.2021-0406.
    Sun Qi, Zhang Wen, Zhao Yunpeng, et al. 2021. Nap-of-the-object for collecting structure surface and roughness analysis of high-steep rock slopes[J]. Journal of Engineering Geology, 29(5): 1460- 1468. doi: 10. 13544/j.cnki.jeg.2021-0406.
    Citation: Sun Qi, Zhang Wen, Zhao Yunpeng, et al. 2021. Nap-of-the-object for collecting structure surface and roughness analysis of high-steep rock slopes[J]. Journal of Engineering Geology, 29(5): 1460- 1468. doi: 10. 13544/j.cnki.jeg.2021-0406.

    高陡岩质斜坡结构面的无人机贴近采集与粗糙度分析

    NAP-OF-THE-OBJECT FOR COLLECTING STRUCTURE SURFACE AND ROUGHNESS ANALYSIS OF HIGH-STEEP ROCK SLOPES

    • 摘要: 为了研究采样尺寸、采样间距对结构面粗糙度评价结果的影响,本文以川藏线昌都至林芝段的色曲特大桥左岸高陡斜坡结构面为研究对象。使用无人机贴近摄影测量技术获取斜坡的三维空间坐标和表面纹理数据;室内实现斜坡的三维重建以及点云化处理;从点云模型上人为提取出37个结构面信息,使用MATLAB进行结构面规则网格化重建;基于Z2S法描述结构面粗糙度表征值在不同尺寸、不同间距下的变化规律。结果表明:结构面粗糙度的尺寸效应、间距效应明显,采样间距的增大使有效采样尺寸值减小。因此,在进行粗糙度研究时应选取较小的采样间距,采样尺寸应大于等于“真”有效采样尺寸值。此外,本文是无人机贴近摄影测量技术应用在结构面数据采集领域的一个案例,是进行结构面粗糙度特征研究的有益补充。

       

      Abstract: To analyze the influence of sampling size and sampling spacing on the evaluation results of structural surface roughness,this paper takes the structural surface on the left bank of the high steep slope of the Sequ Special Bridge in the section from Chengdu to Linzi on the Sichuan-Tibet line as the research object. The 3D coordinates and surface texture data of the slope are obtained with the nap-of-the-object. The 3D reconstruction of the slope and the point cloud processing are realized indoors. 37 structural surface information are artificially extracted from the point cloud model and the structural surface mesh reconstruction is performed with MATLAB. The variations of roughness in different sizes and intervals are described based on the Z2S method. The analysis results show that the scale effect and interval effect of structural surface roughness are obvious; the increase in the sampling interval can reduce the effective sampling size value. Thus,a smaller sampling interval should be selected when conducting roughness research,and the sampling size should be greater than or equal to the true effective sampling size value. In addition,this paper is a case of the application of the nap-of-the-object in the field of structural surface data collection and is a useful supplement to the research on structural surface roughness characteristics.

       

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