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Geomechanics and Engineering
  Volume 14, Number 5, April10 2018, pages 453-458

Estimation of geomechanical parameters of tunnel route using geostatistical methods
Ali Aalianvari, Saeed Soltani-Mohammadi and Zeynab Rahemi

    Geomechanical parameters are important factors for engineering projects during design, construction and support stages of tunnel and dam projects. Geostatistical estimation methods are known as one of the most significant approach at estimation of Geomechanical parameters. In this study, Azad dam headrace tunnel is chosen to estimate Geomechanical parameters such as Rock Quality Designation (RQD) and uniaxial compressive strength (UCS) by ordinary kriging as a geostatistical method. Also Rock Mass Rating (RMR) distribution is presented along the tunnel. Main aim in employment of geostatistical methods is estimation of points that unsampled by sampled points.To estimation of parameters, initially data are transformed to Gaussian distribution, next structural data analysis is completed, and then ordinary kriging is applied. At end, specified distribution maps for each parameter are presented. Results from the geostatistical estimation method and actual data have been compared. Results show that, the estimated parameters with this method are very close to the actual parameters. Regarding to the reduction of costs and time consuming, this method can use to geomechanical estimation.
Key Words
    geostatistics; geomechanical parameters; tunnelling; ordinary kriging
Ali Aalianvari, Saeed Soltani-Mohammadi and Zeynab Rahemi: Department of Mining Engineering, Faculty of Engineering, University of Kashan, Kashan, Iran

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