《工程岩体分级标准》中基本质量指标BQ的简化图解法

针对目前国内外岩体分级体系的多样性,依据评价岩体稳定性的基本方法归纳总结了工程应用中典型的岩体分级方法。根据我国岩体分级的最新规范《工程岩体分级标准》(GB/T 50218—2014),整理了规范中岩体分级的逻辑结构图,提出了岩体基本质量指标BQ的简化计算方法。利用数形结合的思想,将定量指标BQ用简化图解法来表示,通过不同行业内岩土工程的具体实例进一步验证该方法的可行性,所得成果可为岩土工程的稳定性研究提供参考。

Simplified graphical method of basic quality index BQ in “Standard for Engineering Classification of Rock Mass”

Aiming at the diversity of the current rock mass classification systems at home and abroad，the typical rock mass classification methods in engineering application are summerized herein according to the basic method of evaluating the stability of rock mass. On the basis of the latest norm for the rock classification in China—“Standard for Engineering Classification of Rock Mass（GB/T 50218—2014）”，the logic structure graphs for the rock classification listed in the standard are are sorted，and then a simplified calculation method for the rock mass basic quality index BQ is proposed. Based on the methodology of number-shape combination，the quantitive index BQ is represented by a simplified graphical method，moreover，the feasibility of the method is verified through the specific cases of the rock-soil engineering projects carried out in various relevant sectors. The result obtained herein can provide a reference for the stability study of rock-soil engineering.