掲載雑誌（和）： 岩盤力学に関するシンポジウム講演論文集 Vol： 21巻 年： 1989年 頁： 487-488頁 著者（和）： 谷本　親伯 タイトル（和）： トンネルにおける岩盤分類と問題点 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF THE SYMPOSIUM ON ROCK MECHANICS 著者（英）： Chikaosa TANIMOTO タイトル（英）： ROCK CLASSIFICATION IN TUNNELLING 抄録（英）：
Rock classification in tunnelling aims at providing practical approach. for rational deign and construction management. Ranking in respective rock classifications is based on major parameters related with certain characteristics of jointed rock masses as shown in the attached table, in which 33 representative classifications for domestic and foreign tunnels were summarized by our committee in 1979. Analyzing the principal parameters and concepts employed in those classifications, it is found that following parameters have been picked up as common ones: (1) joint spacing or frequency, (2) filling materials in joints. (3) state of Joint ( degree of weathering, alteration, etc. ) , (4) core recovery and RQD, (5) underground water, water inflow, (6) primary ,stress state, rock mass strength, and (7) wave velocity in situ and in a specimen. The last item on the seismic method ( mainly, based on refraction ) has been extensively developed in Japan and has become conventional in both investigations at the planning stage and field measurement/monitoring at the construction stage. On the other hand, though the propagation velocity of a seismic wave is an overall index of the dynamic behaviour of a rock mass, its relationship to the mechanical properties of rock including discontinuities has not yet been clarified In order to utilize it more efficiently it is necessary to discuss concrete relationship between wave propagation and mechanical properties of a rock mass, It would be recommended to compare it with quantitative classifications such as Barton' s Q or Bieniawski's RMR. Comparing the rock classifications employed in tunnelling with the ones in dam construction, tunnelling is carried out on a long line, and it must be subject to wide variation of rock condition. consequently, a detail and expensive observation or investigation does not make a great sense and daily monitoring at mining face is essential. In tunnelling it is required the rock classification which provides a practical guide in respect of rock deformation, and selection and size of support/lining elements. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集