Three-Dimensional Limit Analysis of Slopes with Pore Pressure
Three-Dimensional Limit Analysis of Slopes with Pore Pressure
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DOI：
10.1061/(asce)gt.1943-5606.0000867
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发表时间：
2013-09
影响因子：
3.9
通讯作者：
R. Michalowski;Srinivasa S. Nadukuru
中科院分区：
文献类型：
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作者：
R. Michalowski;Srinivasa S. Nadukuru
三维（3D）边坡稳定性分析不进行常规，因为他们涉及到增加的努力相比，二维分析，因为后者产生更保守的结果。然而，在故障区域的宽度有明显限制的情况下（例如，在开挖的情况下），使用三维稳定性分析进行安全评估可能更合适。极限分析的运动学方法评估的斜坡的稳定性，最近设想的刚性旋转的3D机制的基础上修改，包括脚趾以下的故障，这是常见的缓坡。边坡中孔隙水压力的存在近似包括使用标量参数ru。结果以临界高度（或无量纲系数γH/c）的形式给出，也以图表和封闭形式的近似公式的形式给出，该公式允许直接评估具有约束宽度的边坡的安全系数。不出意外的是，T…
AbstractThree-dimensional (3D) slope stability analyses are not performed routinely because they involve increased effort compared with two-dimensional analyses, and because the latter yield more conservative results. However, in cases of distinct limitations of the width of the failure region (e.g., in the case of excavations), an assessment of safety using 3D stability analyses may be more appropriate. The kinematic approach of limit analysis for the assessment of stability of slopes is presented, based on a recently conceived rigid-rotation 3D mechanism modified to include below-toe failures, which are common for gentle slopes. The presence of pore-water pressure in the slope is included approximately using the scalar parameter ru. The results are presented in terms of the critical height (or dimensionless coefficient γH/c), and also in the form of charts and a closed-form approximation formula that allow for direct assessment of the safety factor for slopes with constrained width. Not surprisingly, th...