CAJ | 학술논문

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.
공정암체질량평개시지하동실공정선지、설계필수회답적주요공정지질문제,재허다상용적암체질량평개방법중,암체적완정성지수시일개중요평개지표,이유우암심사하효응화실내、원위파속측시적빈솔차이방면적원인도치암체완정성지수불능구준학적표시암체적완정정도,유시심지회산생암체완정성지수대우1적불합리적현상.논문침대이상문제개전암괴파속-응력관계상관적시험,연구암괴적파속-응력관계,제출암괴사하지표화빈솔수정계수2개인자대암체완정성지수계산공식진행수정,진이대국표BQ암체질량분급법진행개진.최후장개진적BQ암체질량분급법재황도지하수봉석유동고공정중진행응용,평개결과표명장구절대부분암체질량도위Ⅰ급혹Ⅱ급.
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.