裂隙隙宽随剪切位移发展的演化规律研究  

Study on Evolution Law of Development of Fractured Aperture with Shear Displacement

作　　者：陈斌[1] 赵坚[1] 李英玉[1] 朱蓓[1] 

机构地区：[1]河海大学水利水电学院,江苏南京210098

出　　处：《水利与建筑工程学报》2013年第5期92-96,共5页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金资助重点项目(40930635);国家自然科学基金资助(51279045)

摘　　要：对单裂隙水流传输特性的研究是裂隙网络相关研究的基础,其水力传导系数取决于裂隙面粗糙度、接触率及隙宽开度分布情况。模拟了裂隙隙宽随剪切位移变化的空间分布规律,通过计算机程序生成不同粗糙度的裂隙面,并探讨了裂隙开度、接触率与剪切位移、裂隙面分形维数的关系,得出结论:法向应力不变情况下,裂隙的隙宽均值和接触率随着剪切位移的增大而增大;相同剪切位移下,分形维D值越大,隙宽均值与接触率也越大;且接触部分均由剪切初期的分散状态逐渐发展到片状分布状态。The studies for the transmission characteristics of single fracture flow are the foundation of fractured network research, the hydraulic conductivity of which depends on the distribution of fractured surface roughness, contact rate and fractured aperture. Here, the spatial distribution pattern of the fractured aperture with the change of tangential displacement is simulated. The fissured surface in various roughness can be produced by computer programs, and the relationships between the fractured aperture, contact rate and tangential displacement, fractal dimension are discussed. The conclusions are drawn as follows ： the uniform values of fissured aperture and contact rate would increase with the increasing of tangential displacement when normal stress keeps in constant; and under the same tangential displacement, the uniform values of fissured aperture and contact rate would increase with the increasing of fractal dimension D ; simultaneously, the contiguous part would develop from the initial dispersed state to sheet distribution state.

关 键 词：裂隙岩体 分形维 剪切位移 隙宽演化 

分 类 号：TU45[建筑科学—岩土工程]