利用钻孔岩芯RQD估算岩体变形模量  

The Estimation of the Deformation Modulus of Rock Masses Using the RQD of Drilling Core

作　　者：梁冠军[1] 倪恒[1] 王先斌[1] 叶长锋[1] 刘翔宇[1] 

机构地区：[1]国核电力规划设计研究院,北京100095

出　　处：《长春师范大学学报》2015年第2期27-32,共6页Journal of Changchun Normal University

摘　　要：岩体变形模量是岩体工程设计最重要的参数之一。相比原位测试法,运用建立在原位测试、相关岩体地质特征和室内岩石力学试验基础上的经验关系方法来确定岩体变形模量则显得更为方便快捷,更适合于中小型工程实际应用。本文探讨了采用极易获取的钻孔岩芯RQD来估算岩体变形模量的可行性,以山东某核电基地为实例,在Zhang和Einsten估算公式的基础上,对RQD在0-60%区间内,提出了预测变形模量的估算公式,改善了Zhang和Einsten估算公式在此RQD区间样本数据较少的缺陷,结果表明两种公式具有较好的一致性;最后利用实测的岩体不同方向变形模量,探讨了不同方向变形模量比值与RQD的关系。The deformation modulus of rock masses is one of the most important parameters applying to the design of rock engineering.Compared with the in- situ testing method,the empirical relationship method which bases on the in- situ testing result,the related rock masses＇ geological characteristics and the interior rock mechanics laboratory test is much more convenient in the process of estimating the deformation modulus of rock masses and more suitable for small and medium sized engineering projects. In this paper,the feasibility of using the RQD of drill core to estimate the deformation modulus of rock masses was discussed. Taking a nuclear power plant base in Shandong province as an example,a new estimation formula to predict the deformation modulus for RQD in the range from 0 to 60% was proposed on the basis of Zhang and Einsten＇s estimation formula,and the new estimation revised the shortcoming of Zhang and Einsten for the less sample data of RQD in this range. The results showed a good agreement with the two formulas. At last,the relationship between the ratios of the deformation modulus in different directions and RQD was discussed using the in- situ measured rock deformation modulus in different directions.

关 键 词：RQD 变形模量 岩体 

分 类 号：TV223[水利工程—水工结构工程]