RMR法评价体系的修正及工程应用

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Abstract The three indices of uniaxial compressive strength，RQD value and structural face interval in the existing RMR method evaluation system aim at the grading value of a interval，and are all applied to engineering with the conservative values. By selecting a large number of rock quality evaluation data related to the present engineering projects，the grading standard of the three indices is studied and their grading intervals are corrected. The characteristic of nonlinear step changes of the grading values is corrected，which makes the grading values become linear and continuous. The linear relationship expression between the indices value and grading value is built. The corrected results are applied to the actual projects and get good effect，which can provide a certain reference for the rock mass quality evaluation and the engineers.

Key words： rock mechanics RMR system regression analysis index correction linear relationship

Received: 13 August 2012

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https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3309

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