天然岩体结构面粗糙度各向异性、尺寸效应、间距效应研究

葛云峰; 唐辉明; 王亮清; 赵斌滨; 吴益平; 熊承仁

doi:10.11779/CJGE201601019

天然岩体结构面粗糙度各向异性、尺寸效应、间距效应研究 English Version

1. 中国地质大学（武汉）工程学院,湖北武汉 430074;
2. 中国电力科学研究院,北京 100055;
3. 中国地质大学（武汉）教育部长江三峡库区地质灾害研究中心,湖北武汉 430074

基金项目: 国家自然科学基金项目（41230637,41272309）; 中央高校基本科研业务费专项资金项目（CUGL150822）; 中国博士后基金项目（2015M570672）; 岩土钻掘与防护教育部工程研究中心开放研究基金项目（201502）

详细信息

作者简介:
葛云峰(1985- ),男,讲师,主要从事地质灾害预测与防治、工程岩土体稳定性方面的教学和科研。

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出版历程
- 收稿日期: 2015-03-12
- 发布日期: 2016-01-19

Anisotropy, scale and interval effects of natural rock discontinuity surface roughness

1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China;
2. China Electric Power Research Institute, Beijing 100055, China;
3. Three Gorges Research Center for Geo-hazard, Ministry of Education, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 为了研究天然岩体结构面粗糙度评价结果影响因素,以重庆武隆地区大尺寸岩体结构面为例,运用三维激光扫描技术,基于Grasselli改进法描述粗糙度在不同采样方向、尺度与精度下的变化规律。结果显示：所选用的天然岩体结构面具有明显的各向异性、正尺寸效应和间距效应,因此在进行粗糙度评价时,采样方向务必与剪切方向保持一致,采样尺寸与采样间距应大于等于和小于等于有效采样尺寸与间距;为便于不同评价方法间结果对比,应保证在相同的采样参数下开展研究。
- 岩石力学 /
- 岩体结构面粗糙度 /
- 各向异性 /
- 尺寸效应 /
- 间距效应 /
- 激光扫描
Abstract: To estimate the influence factors on the natural rock discontinuity roughness, taking an in-situ large scale rock collected in Wulong County, Chongqing City as an example, the variation rules of roughness under different sampling directions, sizes and precisions are analyzed by using the 3D laser scanning technology, and Grasselli’s method is improved through discretization of rock discontinuity into a large amount of quadrangular tiny planes rather than triangular planes. The results show that the natural rock discontinuities considered herein are characterized by obvious anisotropies, positive scale effects and interval effects. Therefore, the sampling direction with respect to roughness data acquisition should be kept the same with the shearing direction (direction of rock mass movement) in the procedure of roughness evaluation. In addition, the sampling size is specified to be equal to or larger than the effective sampling size, while the sampling interval should be equal to or less than the effective sampling interval. For the convenient comparison among the assessed results by different methods, this kind of study should be performed under the same sampling parameters including sampling directions, sizes and intervals.
- rock mechanics /
- rock discontinuity surface roughness /
- anisotropy /
- scale effect /
- interval effect /
- laser scanning

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参考文献(30)

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文章访问数: 568
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天然岩体结构面粗糙度各向异性、尺寸效应、间距效应研究 English Version

作者简介: 葛云峰(1985- ),男,讲师,主要从事地质灾害预测与防治、工程岩土体稳定性方面的教学和科研。

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出版历程

Anisotropy, scale and interval effects of natural rock discontinuity surface roughness

期刊类型引用(15)

其他类型引用(14)

计量

出版历程

目录

作者简介:
葛云峰(1985- ),男,讲师,主要从事地质灾害预测与防治、工程岩土体稳定性方面的教学和科研。