Abstract:

 The authors study the surrounding rock classification of Huocheling Tunnel on basis of Road Tunnel Design Specification, Q classification method and RMR method and comparatively analyze the classification results. The authors also analyze the adaptability of these classification results in this tunnel in terms of the connotations and application conditions of the classification methods, in order to reduce subjective factors in practice and make the selection of the classification indexes more reasonable and to modify design documents from classification verification. The classification results can help to guide the implement of following works of this tunnel.

Key words:  , weak groundsurrounding rock classificationBQ classification method