三维条件下应用遗传算法与Monte-Carlo法确定节理岩体的综合抗剪强度  

DETERMINATION OF COMPREHENSIVE SHEAR STRENGTH FOR JOINTED ROCK MASSES IN 3D CONDITION USING GENETIC ALGORITHM AND MONTE-CARLO METHOD

作　　者：杜景灿[1] 陈祖煜[2] 弥宏亮[3] 汪小刚[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,北京100044 [2]中国水利水电科学研究院岩土研究所,北京100044 [3]清华大学水利水电工程系,北京100084

出　　处：《岩石力学与工程学报》2004年第13期2157-2163,共7页Chinese Journal of Rock Mechanics and Engineering

摘　　要：使用遗传算法并充分利用二维研究成果,提出了在结构面三维模拟网络中搜寻结构面与岩桥的最小抗剪力组合的断层扫描方法,从而可以应用Monte-Carlo法的原理,在计算机上多次模拟岩体的剪切试验,最终确定节理岩体的综合抗剪强度。该方法反映了结构面在三维岩体空间的几何分布特征,抓住了控制岩体力学性质的主要因素,并通过使用二维的结构面扩展模型反映了结构面与岩桥的破坏机理及结构面与岩桥的相互作用机理。实例分析的计算结果与反演结果相符,说明了该方法的合理性。Making full use of the results of two-dimensional research and the excellent properties of Genetic Algorithm and Monte-Carlo Method, a method was presented to find the combinations of joint and rock bridge associated with the least comprehensive shear force in simulated 3D joint maps and determine the shear strength and persistence property of jointed rock masses. This method is able to reflect the main factor which controls mechanical properties of a rock mass, for it takes into account the distribution characteristics of 3D joints. The calculation results of two examples are in accordance with the results of back analysis, and the method is proved to be reasonable.

关 键 词：遗传算法 MONTE-CARLO法 结构面 三维模拟网络 岩石力学 节理岩体 

分 类 号：TU452[建筑科学—岩土工程]