【摘要】 工程岩体质量评价是地下洞室工程选址、设计必须回答的主要工程地质问题,在许多常用的岩体质量评价方法中,岩体的完整性指数是一个重要评价指标,而由于岩芯卸荷效应和室内、原位波速测试的频率差异方面的原因导致岩体完整性指数不能够准确的表示岩体的完整程度,有时甚至会产生岩体完整性指数大于1的不合理的现象。论文针对以上问题开展岩块波速应力关系相关的试验,研究岩块的波速应力关系,提出岩块卸荷指标和频率修正系数2个因子对岩体完整性指数计算公式进行修正,进而对国标BQ岩体质量分级法进行改进。最后将改进的BQ岩体质量分级法在黄岛地下水封石油洞库工程中进行应用,评价结果表明场区绝大部分岩体质量都为I级或II级。更多还原

【Abstract】 For most evaluating methods of engineering rock mass,the integrality index is an important assessment factor.However,sometimes the value of integrality index would be more than 1.0 because of unloading effect of rock samples and differentia of frequency between the measurements of rock samples and rock mass.In order to solve this problem,unloading index and frequency correcting coefficient were put forward to revise the integrality index.Moreover,the BQ evaluating method proposed in the national standard(GB 50218-94) was improved with the revised method.With the case study of the project of water sealed underground oil tank in Huangdao,it was found that the quality of rock mass in the site was grade I or II.更多还原