岩体隧道施工诱发的关键块体三维模型及其验证

3-D Model for Key Block Due to Rock Tunnel Construction and Its Computerized Verification

在岩体隧道工程岩体结构面的观测基础上,研究了结构面三维模型及网络模拟技术,通过不连续面网络图模拟真实岩体的几何特征,讨论了两种块体搜索方法,即根据确定结构面参数搜索确定块体和根据节理面网络图搜索随机块体的方法.引入概率理论对被节理切割的岩体中关键块进行了分析,采用蒙特卡罗法和面向对象的编程技术,给出了基于统计原理的岩体不连续面三维计算机模拟方法.建立了岩体工程适用的块体搜索和计算模型,实现岩体隧道工程的关键块体计算机搜索、三维显示和旋转等.

With the field survey done for structural planes in rock mass as the geological conditions for tunnel engineering, the 3-D model of structural planes and relevant network simulation were investigated. The two searching techniques for key blocks were discussed via simulating the geometric features of real rock mass in according to the network graph of discontinuous structural planes, i.e. the methods to search randomly the blocks in accordance to either the structural plane parameters determined or the network graph of jointer planes. Then, introducing the probability theory to analyze the key blocks in rock mass dissected by joints and the Monte Carlo method with object-oriented programming, a 3-D simulation modeling technique was given by computer on the basis of statistical for discontinuous planes in rock mass theory. Thus, a block searching computing model adaptable to engineering was set up to implement the computer searching for key blocks with 3-D display and image rotation.