基于离散裂隙网络模型的边坡渗流研究

Seepage Analysis of Slope Based on Discrete Fracture Network Model

以渗流立方定理、质量守恒定理和水流不可压缩假设为基础,对岩体裂隙网络及裂隙岩体的渗流机理进行合理简化和假设,利用Monte-Carlo方法随机生成具有一定分布规律的裂隙几何信息,通过净化处理最终建立裂隙渗流网络模型,并用PCG算法和Fortran语言开发相应的计算程序,对具有复杂裂隙网络的边坡进行渗流计算分析,获得有排水和无排水2种条件下裂隙边坡的渗流规律,为研究岩石裂隙边坡的渗流-应力耦合效应和边坡稳定性分析提供参考。

Based on cubic law, law of conservation of mass and assumption that water being incompressible, a model for seepage in the rock fracture network is established. The seepage process in rock fracture network is theoretically simplified according to the flow mechanism of fractured rock mass. The Monte-Carlo method is used to obtain the geometrical data essential for seepage calculation and then a program is developed with PCG method by Fortran language. Through the comparison with the analytical solutions to the seepage of a homogeneous dam, the validity of the program is checked. Then a primary seepage calculation with a fracture mass slop is performed under the nature and drainage conditions. The results can lay an important foundation for the further analysis of the steady and the coupled mechanical and seepage mechanism of fractured rock slop.