国标《工程岩体分级标准》的应用与进展

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Abstract Based on detailed analysis of all available literature and technical reports in China，a comprehensive review for advancement and application of the Standard of Engineering Classification of Rock Masses(GB50218—94)，“national standard” for short herein，is conducted. Moreover，practical effects for engineering applications of the national standard are evaluated. The relations between the national standard and other rock mass classification methods，including RMR(rock mass rating) system，Q system and HC method used in surrounding rock classification of hydroelectric projects in China，are described. In addition，promotion，advancement and suggestions，for some currently-employed professional standards and rock classification method in the framework of the national standard，are also proposed. Based on the statistic analysis of more than 200 sets of measurement data，a regression formula for rock mass basic quality(BQ) associated with RMR in the national standard is given；and the reasonability of the above-mentioned classification methods for rock mass is further validated. It is shown that rock evaluation system in the national standard is reasonable with strong scientific significance and flexible operability. By using the index of rock mass BQ in the national standard，artificial disturbance during site investigation can be significantly decreased，which can improve the accuracy and effectiveness of rock mass classification，and reduce the laborious work in field. The BQ method is also proven to be convenient for engineering applications at different design stages of projects，but with various experiences accumulated in actual engineering applications，modification of the rock classification method is needed.

Key words： rock mechanics engineering rock mass rock mass classification national standard actual application effect relevance of BQ method to RMR method review of advancement

Received: 24 April 2012

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https://rockmech.whrsm.ac.cn/EN/Y2012/V31/I8/1513

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