强震区公路沿线崩塌危岩体特征提取及失稳分析

doi:10.13722/j.cnki.jrme.2021.0795

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摘要强震区岩体的稳定性问题尤为突出，岩体稳定性受控于岩体结构。本文以云南鲁甸国道公路沿线崩塌危岩体为例，提出直接利用点云数据进行结构面可视化识别和特征信息快速提取的方法。首先，采用随机Hough算法和Fuzzy C-means(FCM)算法对点云数据进行聚类分析，再利用Fast-Marching算法对优势结构面进行三维重建，从而实现对岩体结构面几何信息和空间分布状态的特征提取。在结构面特征提取的基础上，结合HSV技术对研究区原位危岩块体进行识别和统计，并采用Monte Carlo模拟获取研究区原位块体体积分布。最后，对研究区进行运动学分析以判断危岩块体的失稳破坏模式。研究成果对强震区公路危岩体的调查与评价以及防护结构能级设计具有一定参考价值。

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	马显东1
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	周剑3
	张路青1
	孙娟娟1
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	黄福有1
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关键词 ：岩石力学, 强震区, 岩体结构, 无人机点云, 结构面识别, 特征提取, 破坏模式

Abstract：Controlling by rock mass structure，the stability of rock mass in meizoseismal areas is particularly prominent. In this paper，the dangerous rock mass along the Ludian National Highway in Yunnan was taken as a typical example. A method to visually identify structural planes and quickly extract characteristic information by using point cloud directly was proposed. Firstly，based on the point cloud，the random Hough algorithm and the Fuzzy C-means algorithm were used for clustering analysis. Then the Fast-Marching algorithm was applied to reconstruct the dominant structural planes in three dimensions，to realize the characteristic information extraction of geometric information and spatial distribution state of structural planes. Meanwhile，based on the extracted characteristic information of structural planes，combined with HSV technology，the in-situ dangerous rock mass was identified and counted. The Monte Carlo simulation was also used to compute the in-situ rock volume distribution. Finally，the kinematic analysis of the dangerous rock area was carried out to judge the instability failure mode of the dangerous rock mass. The research results have a certain reference value for the investigation and evaluation of road dangerous rock mass in meizoseismal areas and the energy level design of protective structures.

Key words： rock mechanics meizoseismal areas rock mass structure UAV point cloud structural plane identify feature extraction failure mode

引用本文:

马显东1，2，周剑3，张路青1，孙娟娟1，2，黄福有1，2. 强震区公路沿线崩塌危岩体特征提取及失稳分析[J]. 岩石力学与工程学报, 2022, 41(S1): 2901-2914.
MA Xiandong1，2，ZHOU Jian3，ZHANG Luqing1，SUN Juanjuan1，2，HUANG Fuyou1，2. Feature extraction and instability analysis of dangerous rock mass along highway in meizoseismal areas. , 2022, 41(S1): 2901-2914.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0795 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/IS1/2901

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