文献类型：期刊文献

中文题名：岩石结构面形貌分级方法及两级粗糙特性研究

英文题名：Study on morphological classification method and two-order roughness of rock joints

作者：黄曼[1];洪陈杰[1];杜时贵[1];罗战友[2];张国柱[3]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴312000;[2]浙江科技学院岩土工程研究所,浙江杭州310023;[3]东南大学岩土工程研究所,江苏南京210096

年份：2020

卷号：39

期号：6

起止页码：1153

中文期刊名：岩石力学与工程学报

外文期刊名：Chinese Journal of Rock Mechanics and Engineering

收录：CSTPCD、、EI(收录号：20203008979040)、北大核心2017、Scopus、CSCD2019_2020、北大核心、CSCD

基金：国家自然科学基金资助项目(41572299,41427802);浙江省自然科学基金资助项目(LY18D020003)。

语种：中文

中文关键词：岩石力学;岩石结构面;两级粗糙参数;界限采样间距;尺寸效应;间距效应

外文关键词：rock mechanics;rock joints;two-order roughness;limit sampling interval;size effect;interval effect

中文摘要：岩石结构面三维形貌是影响剪切力学特性的主要因素,针对不同采样间距下结构面形貌的变化特征,提出基于界限采样间距的形貌分级方法,获取表面宏观起伏分量和微凸体的两级粗糙参数,进一步研究4种天然岩石结构面两级粗糙参数的尺寸效应和间距效应特性。结果表明:小采样间距下结构面总粗糙参数与二级粗糙参数相近,大采样间距下结构面总粗糙参数与一级粗糙参数相近,验证了利用采样间距进行结构面形貌分级的可行性;一级粗糙参数存在较明显的负尺寸效应,二级粗糙参数尺寸效应不明显,体现了结构面粗糙度尺寸效应主要由一级粗糙参数反映。通过两级粗糙参数的几何机制分析表明,宏观起伏分量较微凸体具有的大起伏波长是造成两级粗糙参数存在尺寸效应与间距效应的关键因素;通过模型剪切试验的力学分析发现,两级形貌在剪切过程中的不同阶段粗糙值贡献不同,结构面抗剪强度研究应综合考虑不同尺度下的两级粗糙特征。

外文摘要：Three-dimensional morphology of rock joints is the main factor affecting the shear mechanical properties.Aiming at the change of the morphological characteristics of rock joints with different sampling intervals,a morphological classification method based on the limit sampling interval is proposed,the two-order roughness of the macroscopic undulation component and asperities of joint surfaces is obtained,and further the size and interval effects of the two-order roughness of four types of natural joints are studied.The results show that the total roughness of joints is close to the second-order roughness at a small sampling interval while close to the first-order roughness at a large sampling interval,which verifies the feasibility of morphology classification using the sampling interval.The first-order roughness has obvious negative size effect while the size effect of the second-order roughness is not obvious,indicating the size effect of the joint roughness is mainly reflected by the first-order roughness.The analysis of the geometric mechanism of two-order roughness shows that the larger undulation wavelength of the macroscopic undulation component compared to asperities is the key factor that causes the size and interval effects of the two-order roughness.Through the mechanical analysis of the shear model test,it is found that the two-order roughness contributes differently at different shearing stages.The study of the joint shear strength should comprehensively consider the two-order roughness characteristics at different scales.