Discussion about How to Determine the Value of Rock Core During Calculating the RQD Value of Rock Mass
- 厦门大学－已发表论文 
RQD（Rock Quality Designation）值是国内外各种主要岩体工程分类方法中必不可少的主要参数，但是目前国内外各种专著、教材和相关规范中对RQD值计算中是否包括长度为10cm的岩芯的表述不一。是否计入10cm长的岩芯导致计算所得的RQD值不同，影响着岩石质量评价和评级，从而影响工程造价。通过查阅大量资料，分析、对比了各种表述方式，并在文中给出了部分权威专家在专著、教材和规范中的具体表达方式。根据RQD值的提出人Deere．D．U的相关文献及相关国家标准规范，倾向于在RQD值计算中应计入大于等于10cm长岩芯的结论。Rock Quality Designation Value （RQD） is a necessary parameter for the classification of rock mass and engineering all over the world, but in relative references, textbooks and regulations around the world, there are different statements on whether rock core with the length of 10 cm was included during calculating the RQD value of rock mass. Thus, whether adding rock core with the length of 10 cm could lead to different RQD values affecting the quality assessment and rate of rock mass, thereby affecting engineering costs. Through consulting abundant references to compare and analyze various statements, there were parts of the specific expressions in the references, textbooks and regulations written by some authority in the paper. According to Deere.D.U＇s relative references and national standards, it tended to this conclusion that rock core with the length of 10 cm or longer than it would be added during calculating the RQD value of rock mass.