Measurement of Joint Roughness Coefficient by Using Profilograph and Roughness Ruler

Joint roughness coefficient（JRC） is the key parameter for the empirical estimation of joint shear strength by using the JRC-JCS（joint wall compressive strength） model.Because JRC has such characteristics as nonuniformity,anisotropy,and unhomogeneity,directional statistical measurement of JRC is the...

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Bibliographic Details
Published in:Journal of earth science (Wuhan, China) China), 2009-10, Vol.20 (5), p.890-896
Main Author: 杜时贵 胡云进 胡晓飞
Format: Article
Language:English
Subjects:
Anisotropy
Biogeosciences
Deformation
Earth and Environmental Science
Earth science
Earth Sciences
Geochemistry
Geological engineering
Geology
Geophysics
Geotechnical Engineering & Applied Earth Sciences
Rock properties
Roughness coefficient
Shear strength
关键参数
定向测量
抗剪强度
测量方法
粗糙度系数
糙率
系数法
经验估计
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Summary:Joint roughness coefficient（JRC） is the key parameter for the empirical estimation of joint shear strength by using the JRC-JCS（joint wall compressive strength） model.Because JRC has such characteristics as nonuniformity,anisotropy,and unhomogeneity,directional statistical measurement of JRC is the precondition for ensuring the reliability of the empirical estimation method.However,the directional statistical measurement of JRC is time-consuming.In order to present an ideal measurement method of JRC,new profilographs and roughness rulers were developed according to the properties of rock joint undulating shape based on the review of measurement methods of JRC.Operation methods of the profilographs and roughness rulers were also introduced.A case study shows that the instruments and operation methods produce an effective means for the statistical measurement of JRC.
ISSN:1674-487X
1867-111X
DOI:10.1007/s12583-009-0075-3