Identification and characterization of rock discontinuities under complex terrain conditions based on UAV photogrammetry and ANN algorithm

IF 3.7 2区 工程技术 Q3 ENGINEERING, ENVIRONMENTAL
Xiandong Ma, Shengwen Qi, Weiwei Zhu, Yongchao Li, Zan Wang
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引用次数: 0

Abstract

Rock discontinuities are crucial to the stability of rock mass. Under complex high-steep slope conditions, such as the interference of vegetation, a large number of discontinuity sets, and a high degree of weathering, the characterization of rock discontinuities is usually challenging. To this end, this paper proposed an approach for rock discontinuity identification and characterization based on UAV photogrammetry and artificial neural network (ANN) algorithm. UAV photogrammetry was used to obtain 3D point clouds of the study area. The vectors of multi-dimensional features including point cloud orientation features (Normal vectors), geometric features (Anisotropy, Planarity, Roughness, etc.), and optical features (RGBVI), were obtained by calculation. Then, by constructing an ANN model and using the multi-dimensional feature vectors as the network input, the multivariate classification task of rock discontinuities was realized. The ANN algorithm can simultaneously identify and classify all discontinuities of the rock mass and non-discontinuities, as well as each rock discontinuity set. On this basis, the extraction of the individual discontinuities was achieved by the Fast-marching approach. Two case studies were utilized to illustrate the methodology. The results show that this approach has high accuracy and high computational efficiency. The main advantage of the proposed approach is that the ANN can handle complex discontinuity extraction tasks without a complicated pre-processing process, making it highly applicable.

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来源期刊
Bulletin of Engineering Geology and the Environment
Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合
CiteScore
7.10
自引率
11.90%
发文量
445
审稿时长
4.1 months
期刊介绍: Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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