Barton标准剖面JRC与独立于离散间距的统计参数关系研究  

RESEARCH ON RELATIONSHIP BETWEEN JRC OF BARTON’S STANDARD PROFILES AND STATISTIC PARAMETERS INDEPENDENT OF SAMPLING INTERVAL

作　　者：孙辅庭[1] 佘成学[1] 万利台 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《岩石力学与工程学报》2014年第A02期3539-3544,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金资助项目(51079108);中央高校基本科研业务费专项资金资助项目(2012206020208)

摘　　要：以Barton提出的10条标准节理剖面线为研究对象,首先,分析4个统计粗糙度参数与剖面线离散间距的关系,并用幂函数对统计参数与离散间距的关系进行拟合,得到独立于离散间距的粗糙度幂参数;其次,利用粗糙度幂参数建立新的JRC计算公式,从而使得JRC的估算公式不再依赖于离散间距;最后,提出一种更为近似的JRC估算方法,应用该方法可以在一定范围内选取任意间距离散节理剖面线。新的JRC计算方法具有一定的理论创新及较好的应用前景。Ten standard joint profiles proposed by Barton is taken as the research object. Firstly,relationship between four statistical roughness parameters and sampling interval of the ten profiles is analyzed,and roughness power parameters are calculated by using power function to describe the relationship. Secondly,new computational formulas of JRC are established based on the power roughness parameters,it makes the JRC computational formulas no longer depends on sampling interval of joint profiles. Finally,an approximate method to estimate JRC is proposed and any sampling interval in a certain scope can be selected to measure the joint profiles. The new method to calculate JRC value has a certain theoretical innovation and good application prospect.

关 键 词：岩石力学 岩石节理 粗糙度 统计参数 幂参数 离散间距 

分 类 号：TU45[建筑科学—岩土工程]