publication . Other literature type . Article . 1974

Engineering classification of rock masses for the design of tunnel support

N. Barton; R. Lien; J. Lunde;
  • Published: 01 Dec 1974
  • Publisher: Springer Science and Business Media LLC
Abstract
Engineering Classification of Rock Masses for the Design of Tunnel Support An analysis of some 200 tunnel case records has revealed a useful correlation between the amount and type of permanent support and the rock mass qualityQ, with respect to tunnel stability. The numerical value ofQ ranges from 0.001 (for exceptionally poor quality squeezing-ground) up to 1000 (for exceptionally good quality rock which is practically unjointed). The rock mass qualityQ is a function of six parameters, each of which has a rating of importance, which can be estimated from surface mapping and can be updated during subsequent excavation. The six parameters are as follows; theRQD ...
Subjects
free text keywords: Geotechnical Engineering and Engineering Geology, General Engineering, Earth and Planetary Sciences (miscellaneous), General Earth and Planetary Sciences, General Environmental Science, Strength of materials, Shotcrete, Rock mechanics, Structural engineering, business.industry, business, Geotechnical engineering, Core recovery parameters, Rock mass rating, Excavatability, Engineering, Geological Strength Index, Rock mass classification
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publication . Other literature type . Article . 1974

Engineering classification of rock masses for the design of tunnel support

N. Barton; R. Lien; J. Lunde;