The lengths of intact rock core pieces (LIRCP) and the corresponding rock quality designation (RQD) are two essential indexes for grasping rock structure. However, joints are usually simplified to be perfect planes. Thus, the influence of joint roughness on the LIRCP and RQD is not fully considered. The joint roughness was described by the Hurst exponent (H) and the root-mean-square of the point heights on a joint (Rq) in the study. Theoretical formulas were derived and a new practical method of building non-planar joint disc models was proposed to reveal the influence of joint roughness and to estimate the LIRCP and RQD in the field. A 3D point cloud with the texture of a rock slope was acquired by photogrammetry to verify the practicability of the new method. Results showed that: a) the LIRCP obeyed a normal distribution, and the distribution form was mainly controlled by Rq rather than H when there was one equal spacing parallel joint set; b) Rq and H significantly affected the mean length and the number of intact rock core pieces and the value of RQD when joints were non-parallel; c) following the rise of Rq, the number of intact rock core pieces and the value of RQD trended to increase but the mean length of intact rock core pieces displayed a downtrend; however, the effect degree of Rq on the trend decreased as the rise of H; d) the new method of building non-planar joint disc models was applicable to estimate the LIRCP and RQD in engineering practices.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Estimation of the Lengths of Intact Rock Core Pieces and the Corresponding RQD considering the Influence of Joint Roughness


    Weitere Titelangaben:

    KSCE J Civ Eng


    Beteiligte:
    Liu, Tiexin (Autor:in) / Jiang, Annan (Autor:in) / Zhang, Zhenghu (Autor:in) / Liu, Huaizhong (Autor:in) / Zheng, Jun (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2023-06-01


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    New approach to quantifying rock joint roughness based on roughness mobilization characteristics

    Hong, Eun-Soo / Lee, In-Mo / Cho, Gye-Chun et al. | Online Contents | 2014


    New approach to quantifying rock joint roughness based on roughness mobilization characteristics

    Hong, Eun-Soo / Lee, In-Mo / Cho, Gye-Chun et al. | Springer Verlag | 2014


    Polynomial-Based Filters with Polynomial Pieces of Different Lengths for Interpolation

    Babic, D. / Renfors, M. / IEEE | British Library Conference Proceedings | 2003