考虑层次结构的岩体结构面三维粗糙度表征方法  

Characterizing 3D Roughness of Rock Mass Structural Surface in Consideration of Hierarchical Structure

作　　者：齐豫 邓华锋[1] 李冠野 熊雨 李涛 QI Yu;DENG Hua-feng;LI Guang-ye;XIONG Yu;LI Tao(Key Laboratory of Geological Hazards in Three Gorges Reservoir Area under Ministry of Education,China Three Gorges University, Yichang 443002, China)

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002

出　　处：《长江科学院院报》2022年第1期134-138,154,共6页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金项目(51679127);国家自然科学基金重点项目(51439003)。

摘　　要：岩体结构面粗糙度的量化表征一直是岩土工程领域关注的焦点问题。在以往表征方法基础上,结合结构面三维形貌特征扫描分析,综合考虑结构面的层次结构特征,提出采用平均起伏角和平均相对起伏幅度表征一级波状起伏结构,采用面积扩展率表征结构面次级细微粗糙结构,并分析建立了结构面三维粗糙度系数与形貌参数的相关关系。验证分析表明,论文提出的结构面三维粗糙度表征方法可以较好地兼顾结构面一级波状起伏结构特征和次级细微粗糙结构的影响,计算得到的结构面抗剪强度与试验值吻合较好。相关研究结果可为结构面粗糙度量化分析及抗剪性能估算提供较好的借鉴。Quantitative characterization of the roughness of rock mass structural surface has always been a focus in geotechnical engineering.In the light of previous characterization methods combined with scanning results of the three-dimensional topographic features of structural surface,we propose to characterize the first-order undulating structure by average undulation angle and average relative undulation amplitude,and the secondary fine rough structure by area expansion rate.We further established the correlation between the three-dimensional roughness coefficient of structural surface and the topographic parameters.Verification analysis demonstrate that the proposed method takes into account the influence of both the first-order undulating structure and the secondary fine rough structure.The calculated shear strength of structural surface is in good agreement with test value.The research finding is expected to provide reference for quantifying the roughness and estimating the shear strength of structural surface.

关 键 词：结构面 层次结构 形貌参数 粗糙度系数 抗剪强度 

分 类 号：TU45[建筑科学—岩土工程]