The engineering rock mass is a multi-fracture body crisscrossed by geologic structure planes, and its safety is affected by the rock joints’ mechanical properties and morphological features. The joint roughness coefficient (JRC) is a vital characterization method to describe joint surface roughness. Its precise quantization is a crucial factor in predicting shear strength. However, JRC in recent research did not reflect the directional effect of the joint morphology. A new 3D roughness parameter WAD (weighted apparent dip) was proposed to estimate JRC based on the apparent dip angle of the contact unit. The proposed parameter comprehensively reflects the contribution of shear direction and asperity features to the roughness. Based on the ten standard roughness profiles, we investigated the directionality of the WAD and studied the influence of the sampling interval (Sai) on WAD and their correlation with JRC. And the practicability of WAD in evaluating JRC was well verified by the comparison between the indoor test and calculated results with different roughness and shear directions, and the results showed that WAD could accurately estimate the shear strength of the joint rock.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    A New 3D Statistical Parameter for Determining Roughness of Joint Surfaces Considering Shear Direction and Asperity Features


    Additional title:

    KSCE J Civ Eng


    Contributors:
    Liu, Juan (author) / Gao, Feng (author) / Xing, Yan (author) / Zheng, Wenqi (author) / Bai, Yun (author)

    Published in:

    Publication date :

    2023-11-01


    Size :

    15 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Influence of asperity characteristics on plane interface shear behavior

    Lee, Sang-Woo / Jeong, Da-Woon / Lee, Seong-Won et al. | Online Contents | 2014


    Influence of asperity characteristics on plane interface shear behavior

    Lee, Sang-Woo / Jeong, Da-Woon / Lee, Seong-Won et al. | Springer Verlag | 2014


    Modelling the asperity contact area in actual 3D surfaces

    Tomanik,E. / Mahle Brazil Tech.Center,BR | Automotive engineering | 2005


    Modelling of the Asperity Contact Area on Actual 3D Surfaces

    Tomanik, Eduardo | SAE Technical Papers | 2005


    Fractal model of thermal contact conductance of rough surfaces based on cone asperity

    Sun, Xianguang / Xing, Wuce | Emerald Group Publishing | 2023