Writers : Ghafouri,Mohammad;Lashkaripour,Gholamreza;Rostamibarani,Hamidreza;Saba,Abbas Ali
Refference : 11th Symposium Of Geological Society Of Iran - Mashhad, Ferdowsi University
Publishing Year : 1386

Abstract :

Rock mass classification consists of collection and analysis of qualitative and quantitative data for estimation of support requirements, strength parameters and deformability of rock masses. A rock mass classification program not only provides a quantitative data and strength parameters for tunnel support, but also plays an important role in rock mass projects and provides a link between designer and constructor.
Hariroud water transportation tunnel with a length of 942 m excavated in rocks with different properties. In this paper, this tunnel divided into 7 parts with different properties. For each part a comparison was made between Rock Mass Rating parameters according to surface and subsurface data which was available in different phases of study. A few suggestions on the tunnel support presented according to the Rock Mass Rating (RMR) method.