节理岩体二维和三维连通特性的对比分析  

CONTRAST ANALYSIS ON 2D AND 3D PERSISTENCE PROPERTY OF JOINTED ROCK MASS

作　　者：杜景灿[1] 陈祖煜[2] 周家骢[1] 

机构地区：[1]中国国际工程咨询公司能源项目部水电处,北京100044 [2]中国水利水电科学研究院岩土院所,北京100044

出　　处：《岩石力学与工程学报》2004年第11期1824-1831,共8页Chinese Journal of Rock Mechanics and Engineering

摘　　要：从理论上证明了节理岩体内有限大小的结构面实质上是呈三维分布的,岩体出露面上结构面出露迹线的分布一般不能代表三维岩体中结构面的分面特征。因此,实际应用中将涉及三维岩体有限大小结构面的问题简化为二维问题时会引起较大的误差。通过两个算例对比分析了应用Monte Carlo法和遗传算法计算得出的二维和三维连通率,算例分析的计算结果与理论分析相符。It is confirmed in theory that two dimensional distribution of joint trace revealed in an outcrop plane (2D) or in a hole (ID) does not represent three dimensional (3D) distribution of discontinuity with limited size in real rock masses. So a real three dimensional problem of rock masses containing discontinuities with limited size should not be simplified to a two dimensional problem. The contrasts between 2D persistence ratio and 3D persistence ratio of calculation results of two examples are in good accordance with the results of theoretical analysis.

关 键 词：岩石力学 三维连通率 节理岩体 模拟 遗传算法 MONTE Carlo法 

分 类 号：TU45[建筑科学—岩土工程]