+高级检索
基于无人机贴近摄影的高陡边坡结构面识别
DOI:
作者:
作者单位:

作者简介:

通讯作者:

基金项目:


Identification of Discontinuities of High Steep Slope Based on UAV Nap-of-the-object Photography
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
    摘要:

    岩体结构面的产状和位置信息是分析高陡边坡稳定性及确定支护形式的重要依 据. 为解决传统接触式勘测手段存在的风险高、效率低等问题,提出了基于无人机贴近摄影和 聚类算法的高陡边坡结构面自动识别方法. 首先采用M210-RTK无人机获取高分辨率数字图 像,并利用运动恢复结构算法(Structure From Motion,SFM)生成细节丰富的高陡边坡三维模型 和三维点云;再通过K近邻算法(K-Nearest Neighbor,Knn)及PCA主成分分析法,筛选出共面 点云集合并确定了结构面的边界范围;最后采用最小二乘法拟合出共面点云的最佳平面方 程,以平面方程的法向量方向确定结构面的产状参数. 验证实验表明:基于无人机贴近摄影所 建立的三维模型精度优于 2 cm,倾向和倾角的误差分别小于 3°和 2°. 本方法应用于长沙丁字 镇某高陡边坡的结构面识别,成功识别出其优势结构面,并就其对边坡稳定性的影响进行了 分析,可为边坡评价和治理提供重要依据.

    Abstract:

    To analyze the stability and determine the support form of high steep slopes, it is important to con? firm the occurrence and location information of rock discontinuities. In order to solve high risk and low efficiency ex? isting in the traditional survey method, this paper proposed the new survey method to semi-automatically identify the discontinuities in slopes based on nap-of-the-object photogrammetry and a clustering algorithm. Firstly, M210-RTK was used to obtain high resolution digital images; the structure from motion algorithm was used to generate the de? tailed 3D models and 3D point clouds. Then, through the K-Nearest neighbor and principal component analysis algo? rithm, the set of coplanar point clouds was selected to determine the boundary range of discontinuities. Finally, the best planar equation of coplanar point cloud is fitted based on the least-squares method, and the normal vector direction of the planar equation is the basis for calculating the occurrence parameters. Validation experiments show that the accuracy of the digital surface model is better than 2cm in any direction, and the error in dip and dip direction are better than 3° and 2°, respectively. This method identified rock preferred discontinuities in the abandoned mining area of Changsha, and the influence of preferred discontinuities on slope stability was analyzed, providing the vital foundation for the slope evaluation and treatment.

    参考文献
    相似文献
    引证文献
文章指标
  • PDF下载次数:
  • HTML阅读次数:
  • 摘要点击次数:
  • 引用次数:
引用本文

陈昌富 ,何旷宇 ,余加勇 ,毛凤山 ,薛现凯 ,李锋 .基于无人机贴近摄影的高陡边坡结构面识别[J].湖南大学学报:自然科学版,2022,49(1):145~154

复制
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2022-03-04
  • 出版日期:
作者稿件一经被我刊录用,如无特别声明,即视作同意授予我刊论文整体的全部复制传播的权利,包括但不限于复制权、发行权、信息网络传播权、广播权、表演权、翻译权、汇编权、改编权等著作使用权转让给我刊,我刊有权根据工作需要,允许合作的数据库、新媒体平台及其他数字平台进行数字传播和国际传播等。特此声明。
关闭