The reliable assessment of the stability of saturated slopes becomes a challenging task when slopes are consisting of discontinuous materials and containing pre-existing joints. The discontinuous nature of the slopes’ material could increase the overall permeability of the slope, while existing joints facilitate groundwater leakage through the joint surfaces into the slope which subsequently exerts a major impact on deformation and the effective stress distribution. This paper aims to study the Pore Water Pressure (PWP) distribution changes in a saturated fractured slope by conducting advanced coupled pore fluid diffusion and stress-strain analyses, while investigating the sensitivity of results to the variation of permeability and leakage properties of fracture surfaces. Modelling of jointed slopes is carried out using the e-Xtended Finite Element Method (XFEM) in conjunction with the Finite Element Method (FEM). In this study, the fluid flow inside the joint is the major focus at which the constitutive response of the fluid inside the joint considers both tangential and normal flows. To demonstrate the state-of-the-art simulation technique presented in this paper, simulation of a fractured slope at the second largest open-pit mine in Australia is performed as a case study. This study shows the effect of a variable leak-off coefficient of the joint surfaces and the permeability magnitude on the pore water pressure distribution.

当斜坡由不连续的材料组成并包含预先存在的节理时，对饱和斜坡稳定性的可靠评估就成为一项艰巨的任务。斜坡材料的不连续性可以增加斜坡的整体渗透性，而现有的节理则有助于地下水通过节理面渗入斜坡，从而对变形和有效应力分布产生重大影响。本文旨在通过进行高级耦合孔隙流体扩散和应力应变分析，研究饱和裂缝边坡的孔隙水压力（PWP）分布变化，同时研究结果对裂缝表面渗透率和渗漏特性变化的敏感性。结合坡度的建模是使用电子扩展有限元方法（XFEM）结合有限元方法（FEM）进行的。在这项研究中，关节内部的流体流动是关节内部流体的本构响应同时考虑切向和法向流动的主要焦点。为了演示本文介绍的最新模拟技术，以澳大利亚第二大露天矿的裂隙边坡为例进行了模拟。这项研究表明了可变的结合面渗漏系数和渗透率大小对孔隙水压力分布的影响。关节内部的流体流动是关节内部流体的本构响应同时考虑切向和法向流动的主要焦点。为了证明本文介绍的最新模拟技术，以澳大利亚第二大露天矿的裂隙边坡为例进行了模拟。这项研究表明了可变的结合面渗漏系数和渗透率大小对孔隙水压力分布的影响。关节内部的流体流动是关节内部流体的本构响应同时考虑切向和法向流动的主要焦点。为了证明本文介绍的最新模拟技术，以澳大利亚第二大露天矿的裂隙边坡为例进行了模拟。这项研究表明了可变的结合面渗漏系数和渗透率大小对孔隙水压力分布的影响。