工程科学学报2015，Vol.37Issue(12)：1542-1549,8.DOI:10.13374/j.issn2095-9389.2015.12.002
节理岩体数值模拟及力学参数确定
Numerical modeling and mechanical parameters determination of jointed rock mass
摘要
Abstract
A ubiquitous jointed rock mass (UJRM) model constructed by combining the FLAC3D software and discrete fracture network ( DFN) technique, which takes the features of rock and joints into account, has a clear concept, high efficiency of modeling and calculation, and so on. Firstly, the in-situ survey results of joints were statistically analyzed to obtain their probability distribution parameters, on the basis of which the joints were considered in two scales and their DFN models were determined. Secondly, based on the determined DFN models, the jointed rock mass was modeled and the strength characteristics were researched to get the uniaxial compressive strength ( UCS) of engineering rock mass, then the mechanical parameters of jointed rock mass were fitted and determined by the Hoek-Brown and Mohr-Coulomb criteria while considering the max confining stress. Finally, the determined parameters were applied to slope stability analysis, the safety factors of the two kinds of criterions solved by the limit equilibrium method ( LEM) and the strength reduction method ( SRM) are basically the same, indicating that using the proposed approach to determine the mechanical parameters of jointed rock mass is practicable.关键词
节理岩体/数值模拟/力学性能/参数确定/边坡稳定性分析Key words
jointed rock mass/numerical modeling/mechanical properties/parameter determination/slope stability analysis分类
建筑与水利引用本文复制引用
赵伟,吴顺川,高永涛,周喻,肖术..节理岩体数值模拟及力学参数确定[J].工程科学学报,2015,37(12):1542-1549,8.基金项目
国家自然科学基金资助项目(51074014,51174014) （51074014,51174014）
国家青年科学基金资助项目(51504016) （51504016）
科技北京百名领军人才培养工程资助项目(Z151100000315014) （Z151100000315014）
