中文摘要：

岩质滑坡除与地质条件、降雨等因素有关外，泄洪雾雨也成为其不可忽视的催化剂。通过裂隙岩体渗透性与应力关系，裂隙岩体的弹塑性本构关系以及渗流场的控制方程，建立起饱和非饱和渗流场与应力场耦合的等效连续介质模型。编制了有泄洪雾雨影响的饱和一非饱和渗流与应力耦合三维有限元程序，通过迭代求解达到两场耦合目的。以实际工程为例，根据边坡的地表信息、开挖信息、岩层分界信息以及排水洞和帷幕信息等，建立起边坡地质模型。通过耦合计算，详细分析了耦合后边坡岩体的变形、应力以及塑性区等。计算结果表明，雾雨区的边坡稳定与渗流场变化有着重要关系，在评价边坡稳定与否时，要考虑渗流场对其影响。计算成果为实际工程的安全评价提供了一定的科学依据。

英文摘要：

Flood discharge atomized rain is the non-neglectable activator for rock mass landslide, which besides the rainfall. At first, through the relation between seepage characters of fracture rock mass and stress, elastic-plastic constitutive equation of fracture rock mass and control equation of seepage field, the equation continue media model of seepage and stress field coupling is established. Secondly, a 3-D finite element program of saturated-unsaturated seepage and stress coupling under atomized rain programmed, the two-field coupling is solved by iteration method. Finally, taking a typical project for example, the geological model is established according to the earth＇s surface information, excavation information, terrane borderline information, drainage hole and purdah information; the rock mass deformation, stress and plastic area are analyzed in detail by coupling computation, the analysis shows that the slope stability has closely related with the change of saturated-unsaturated seepage field of rock mass system; the seepage field of rock mass system must be considered when estimating slope stability. The result can provide some scientific foundation for project slope stability estimation.