节理岩体数值计算方法及其应用(一):方法与讨论  

NUMERICAL METHODS AND APPLICATION FOR JOINTED ROCK MASS,PART 1:APPROACHES AND DISCUSSIONS

作　　者：朱焕春[1] Brummer Richard Andrieux Patrick 

机构地区：[1]武汉大学水利水电学院,武汉430072 [2]Itasca(加拿大)咨询公司

出　　处：《岩石力学与工程学报》2004年第20期3444-3449,共6页Chinese Journal of Rock Mechanics and Engineering

摘　　要：叙述了工程岩体的典型破坏类型、发生条件和判断方法,简单介绍了针对节理岩体的数值计算方法发展过程、现状和特点,重点叙述了利用3DEC基本功能生成三维随机节理网络和节理力学参数的随机赋值方法。其中三维节理网络技术可以非常逼真地模拟现实条件下各种复杂形式的节理分布,甚至可以直接利用节理的地质编录资料在数值模型中生成确定位置上的确定性节理,在某种程度上一体化地实现了节理岩体的计算机模拟和数值计算,促进了不连续岩体、岩石计算方法在应用技术方面的发展。最后讨论了不连续力学数值计算技术的工程应用,指出了合理运用数值计算方法解决工程问题的一般原则。This paper narrates the typical modes of rock mass failures in engineering activities, the conditions under which such failures occur, and the approaches to predict these failures. A brief description is presented of the evolution, the current state, and the feature of numerical modelling methods for jointed rock mass. Attention is paid to the technique of generating 3-dimensional joint net in rock mass and randomly simulating the properties of each individual joint on the basis of accessible functions in a 3DEC numerical model. Such technique enables 3DEC to build up a model that contains various joints corresponding to the realistic distributions of joints in rock mass and, furthermore, achieve a determinative description of joint distributions by transplanting joint mapping data into a 3DEC model. This, in some degree, fulfills the numerical modelling of geomechanical behaviours of jointed rock mass combined with the computerized simulations of its geometry. The essential principles are discussed of applying numerical modelling techniques for discontinuum into engineering projects.

关 键 词：岩石力学 数值模拟 不连续体 离散元 随机 节理岩体 

分 类 号：TU12[建筑科学—建筑理论]