等效连续岩体的渗流应力耦合模型研究及应用

Hybrid Analysis Model for Coupled Seepage and Stress Fields in Rock Mass of Equivalent Continuum

以渗透系数、孔隙率和应力的关系作为桥梁,当渗流场为非稳定渗流时,建立等效连续岩体渗流的耦合模型.采用有限单元法,进行了数值模拟,并结合算例进行两场耦合计算分析.从算例的计算结果来看,计入耦合作用后,岩体各应力分量都有不同程度的增加,特别是个别方向的应力分量增加幅度较大.因此,在工程设计中应该考虑耦合作用,这对于工程安全有着十分重要的指导意义.

By the linkage between the seepage coefficient, porosity and stress, the hybrid analysis model for coupled seepage and stress field in rock mass of equivalent continuum is established. The FEM numerical method is used to analyze the example when the seepage field is unsteady. The computation results show that the coupled action makes the stress components in rock mass increase by different degree. It is very significant for the design of engineering.