DISCUSSION ON ROCK CLASSIFICATION IN TBM CONSTRUCTION TUNNEL

Useful explore researches had been done by experts on rock-classification for construction TBM tunnel,which were good idea for our later research.The current problem was no obvious consensus classification system or method for TBM tunnel,the classification parameters were more discrete and difficult to obtain,some quantitative indicators directly related to construction were not resolved.So,it was necessary to discuss detailly on rock-classification for construction hydraulic TBM tunnel.Based on the current tunnel rock classification of hydraulic methods from Geological Survey Water Resources and Hydropower Engineering Specification,refered to the Qinling Tunnel Rock Classification TBM construction method,an amended rock classification model was given to fit for hydraulic TBM tunnel,according to these amended parameters,such as,the efficiency,muck characteristics and water inflow of the TBM construction.Then the TBM tunnel construction Hydraulic Rock Classification was Achieved, 2 Examples were provided to validate the above method.