报告详情
Evaluation of morphological characteristics of natural rock mass structural planes and their repeatable preparation
编号：24
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更新：2025-07-21 15:46:19 浏览：11次
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摘要
The morphological characteristics of rock discontinuities directly influence the stability of rock slopes, making accurate evaluation of their morphology and reproducible preparation critically important. In this study, common protoliths were selected to prepare natural rock discontinuities through splitting tests. Three-dimensional scanning technology was employed to acquire point cloud data of the discontinuity surfaces. A novel method for calculating the root mean square of slope (Z2) considering shear direction was proposed and applied to evaluate three-dimensional morphological parameters using processed point cloud data. To validate the stability of reproducible preparation, discontinuities with varying 3D morphological parameters were fabricated based on standard JRC profiles using machining techniques, followed by quantitative evaluation via 3D scanning. Direct shear tests were conducted on the reproduced discontinuities to further verify the reliability of the preparation methods. The results demonstrate that:
(i) The proposed Z2 parameter considering shear direction is effective for processing 3D point cloud data of discontinuity surfaces.
(ii) Both 3D engraving and wire-cutting techniques are feasible for reproducible preparation of rock discontinuities.
(iii) Discontinuities with identical morphology prepared by these two methods exhibit consistent shear behavior, confirming the reliability of the preparation process.
This study provides a reference for addressing the challenge of insufficient sample size in rock discontinuity testing.
(i) The proposed Z2 parameter considering shear direction is effective for processing 3D point cloud data of discontinuity surfaces.
(ii) Both 3D engraving and wire-cutting techniques are feasible for reproducible preparation of rock discontinuities.
(iii) Discontinuities with identical morphology prepared by these two methods exhibit consistent shear behavior, confirming the reliability of the preparation process.
This study provides a reference for addressing the challenge of insufficient sample size in rock discontinuity testing.
关键词
rock discontinuities, discontinuity preparation, 3D scanning, roughness evaluation, 3D engraving, wire-cutting, direct shear test
报告人
gao wenkai
postgraduate Tongji university稿件作者
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重要日期
-
会议日期
08月23日
2025
至08月26日
2025
-
07月21日 2025
初稿截稿日期
-
08月26日 2025
注册截止日期
主办单位
Southwest Jiaotong University, China (SWJTU)
International Consortium on Geo-disaster Reduction (ICGdR)
UNESCO Chair on Geoenvironmental Disaster Reduction
International Consortium on Geo-disaster Reduction (ICGdR)
UNESCO Chair on Geoenvironmental Disaster Reduction
承办单位
Southwest Jiaotong University, China (SWJTU)
International Consortium on Geo-disaster Reduction (ICGdR)
UNESCO Chair on Geoenvironmental Disaster Reduction
International Consortium on Geo-disaster Reduction (ICGdR)
UNESCO Chair on Geoenvironmental Disaster Reduction
联系方式
- Yufeng Wang
- wa******@swjtu.edu.cn
- +86********
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