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An assessment of total RMR classification system using unified simulation model based on artificial neural networks

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Abstract

Engineering design has great importance in the cost and safety of engineering structures. Rock mass rating (RMR) system has become a reliable and widespread pre-design system for its ease of use and variety in engineering applications such as tunnels, foundations, and slopes. In RMR system, six parameters are employed in classifying a rock mass: uniaxial compressive strength of intact rock material (UCS), rock quality designation (RQD), spacing of discontinuities (SD), condition of discontinuities (CD), condition of groundwater (CG), and orientation of discontinuities (OD). The ratings of the first three parameters UCS, RQD, and SD are determined via graphic readings where the last three parameters CD, CG, and OD are estimated by the tables that are composed of interval valued linguistic expressions. Because of these linguistic expresions, the estimated rating values of the last three become fuzzy especially when the related conditions are close to border of any two classes. In such cases, these fuzzy situations could lead up incorrect rock class estimations. In this study, an empirical database based on the linguistic expressions for CD, CG, and OD is developed for training Artificial Neural Network (ANN) classifiers. The results obtained from graphical readings and ANN classifiers are unified in a simulation model (USM). The data obtained from five different tunnels, which were excavated for derivation purpose, are used to evaluate classification results of conventional method and proposed model. Finally, it is noted that more accurate and realistic ratings are reached by means of proposed model.

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Authors and Affiliations

  1. Hereke Ömer İsmet Uzunyol Vocational School, Kocaeli University, Hereke Campus, 41800, Kocaeli, Turkey

    Ertan Mert

  2. Electronics and Communication Department, Engineering Faculty, Kocaeli University, Umuttepe Campus, 41380, Kocaeli, Turkey

    Serhat Yilmaz

  3. Electronics and Computer Education Department, Technical Education Faculty, Kocaeli University, Umuttepe Campus, 41380, Kocaeli, Turkey

    Melih İnal

Authors
  1. Ertan Mert
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  2. Serhat Yilmaz
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  3. Melih İnal
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Correspondence to Ertan Mert.

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Mert, E., Yilmaz, S. & İnal, M. An assessment of total RMR classification system using unified simulation model based on artificial neural networks. Neural Comput & Applic 20, 603–610 (2011). https://doi.org/10.1007/s00521-011-0578-6

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  • DOI: https://doi.org/10.1007/s00521-011-0578-6

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