Three-dimensional analysis of stability is carried out for slopes with the failure mechanism confined to a narrow space. A curvilinear cone failure surface is modified by removing a slice from its central portion, to make the failure mechanism fit in the narrow space. The resulting surface is no longer smooth, and it is referred to as the ridge mechanism for a distinct ridge in the failure surface. The analysis of narrow slopes based on the ridge mechanism appears to yield lower stability factors than the mechanisms used in geotechnical engineering thus far. Kinematic limit analysis utilized in calculations provides an upper bound to the true stability factor solution, hence the newly proposed mechanism delivers a more accurate solution.

中文翻译：

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窄土坡三维脊塌陷机理

对破坏机制局限在狭窄空间内的边坡进行三维稳定性分析。通过从其中心部分去除切片来修改曲线锥体破坏面，使破坏机制适合于狭窄的空间。由此产生的表面不再光滑，它被称为破坏表面中明显脊的脊机制。迄今为止，与岩土工程中使用的机制相比，基于山脊机制的窄边坡分析似乎产生更低的稳定性因子。计算中使用的运动学极限分析提供了真实稳定性因子解的上限，因此新提出的机制提供了更准确的解。