中文摘要：

当节理处于不同的接触状态时,其组合形貌也是不同的。为有效地计算节理的三维组合形貌,在获得节理上下面形貌数据的基础上,提出节理上、下表面稳定接触的判断条件和以此为依据的节理面移动接触算法,然后用VC＋＋语言编制节理三维组合形貌计算程序,利用该程序可以方便地计算节理在不同接触状态下的三维组合形貌参数。最后,以大理岩人工张节理为研究对象,采用自行研制的TJXW–3D型便携式岩石表面形貌测量仪对节理表面进行扫描,得到节理面的形貌数据,然后对大理岩人工张节理人为地分别设定1,2,3,4,5 mm的错开位移形成节理上、下表面不同的接触状态,利用组合形貌计算程序计算不同接触状态下的节理三维组合形貌参数,分析不同接触状态对节理三维组合形貌参数的影响,为研究不同接触状态下单节理的力学和渗流特性与其组合形貌特征的关系奠定基础。

英文摘要：

The mechanical and flow characteristics of rock joint are closely associated with its three-dimensional topography.For a single rock joint,the roughness and waviness of its surface is of paramount importance to flow;and the flow characteristics are related not only to the topography of a single joint surface,but also to the composite topography of the upper and lower joint surfaces.Different contact condition results in different composite topography.The analysis of joint composite topography is the basis of research on flow in a single rock joint.In order to compute the three-dimensional composite topography effectively,the conditions for determining stable contact of two joint surfaces are presented;and the contact algorithm based on determinant conditions is introduced.The Visual C＋＋ programming language is adopted to provide a procedure for three-dimensional composite topography calculation.By using the procedure,the composite topography of joint under different contact conditions can be calculated conveniently with the surface topography data derived from TJXW–3D portable rock surface topography laser scanner developed by Tongji University.Then the fresh marble tension joint is taken as an object;and different contact conditions are formed by dislocating the upper joint surface from the lower joint surface for 1,2,3,4,5 mm respectively after scanning the joint surfaces by TJXW–3D topography scanner.Based on topography data,the composite topography parameters under different contact conditions are calculated by the procedure proposed above;and the influence of different contact conditions on joint composite topography is discussed,which provides a foundation for researches on the relations between three-dimensional composite topography and the mechanical and flow properties of joint under different contact conditions.