Application of Rock Mass Characterization for Determining the Mechanical Properties of Rock Mass: a Comparative Study |
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| Authors: | Mahmoud Hashemi Sh Moghaddas R Ajalloeian |
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| Institution: | (1) Department of Civil Engineering, Faculty of Engineering, The University of Isfahan, 81744-73441 Isfahan, Iran;(2) Engineering Geology, Sabir Engineering Co., Tehran, Iran;(3) Department of Geology, Faculty of Science, The University of Isfahan, Isfahan, Iran |
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| Abstract: | The results of geotechnical explorations, engineering geological investigation (including laboratory and in situ tests) and
field observations have been used, along with borehole logging charts, to obtain the rock mass geotechnical data. Based on
the data, the rock mass along the Sabzkuh water conveyance tunnel route was classified by rock mass rating (RMR), Q-system
(Q), rock mass index (RMi) and geological strength index (GSI) (3 methods). A new series of correlations were established between
the systems based on the data collected from the study area. These relationships were then compared with those reported in
the literature, and two new relations were recommended. The classifications were utilized to calculate mechanical properties
(rock mass strength and deformation modulus) of the rock mass along the tunnel according to available empirical relations,
and to distinguish the upper-bound and lower-bound relations. |
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