水-岩耦合作用下边坡岩体渗流二维数值模拟  

Two Dimensional Numerical Simulation of Slope Seepage with Flow-rock Coupling Effect

作　　者：许文耀[1] 李德宏 王湘桂[3] 

机构地区：[1]北京科技大学土木与环境工程学院 [2]中国石油集团工程设计有限责任公司 [3]中钢集团马鞍山矿山研究院有限公司

出　　处：《金属矿山》2011年第12期30-34,共5页Metal Mine

摘　　要：为了研究岩体渗流及水-岩耦合作用对边坡稳定性的影响,首先基于岩体特征建立等效连续介质模型,然后采用有限元法求解该模型,并利用SEEP/W软件模拟正常水位、暴雨入渗和排水疏干时采区地下水渗流。结果表明:等效连续介质模型可靠性高,地下水二维渗流存在各向异性,且裂隙轴向的水力坡降明显大于裂隙径向;3种工况水力坡降明显区域均为边坡表层、不同岩层交界处及混合Ⅰ岩内;暴雨入渗时水-岩耦合作用导致岩层拉应力增大、孔裂隙扩展,剪切滑移为边坡失稳主要诱发机制,而排水疏干有利于提高边坡稳定性。To investigate the influence of seepage and flow-rock mass coupling effect on slope stability, the equivalent continuum model was firstly introduced based on geological conditions, then the infinite element method was used to solve the model. Finally, the software SEEP/W was adopted to simulate the underground seepage under the conditions of normal water level, rainfall infiltration and drainage. The results show that the equivalent continuum model is reliability, and the two dimensional seepage is inhomogeneous with axial hydraulic gradient greater than radial gradient. Three modes indicate that hydraulic gradient is evident within the slope surface, intersections of different stratums and mixed rock mass I . In addition, the rainfall infiltration results in tensile stress increase and fracture enlargement, shearing and slippage is the main inducement mechanism for slope instability, whereas drainage is efficient to improve the slope safety.

关 键 词：等效连续介质模型 数值模拟 剪切滑移 排水疏干 

分 类 号：TU457[建筑科学—岩土工程]