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首页> 外文期刊>Arabian Journal for Science and Engineering >Stability Analyses of Jointed Rock Slopes with Counter-tilted Failure Surface Subjected to Block Toppling Failure Mechanisms
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Stability Analyses of Jointed Rock Slopes with Counter-tilted Failure Surface Subjected to Block Toppling Failure Mechanisms

机译：块体倾覆破坏机制下具有反倾斜破坏面的节理岩质边坡稳定性分析

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摘要

In rock slopes where sedimentary rock masses dip into the face of the slope, failure may occur by block toppling. In traditional analytical models, the failure surface is assumed to be single plane running from the upper columns to the toe of the slope which may be inconsistent with the physical situation where the weak plane has undergone counter-tilting within the rock slope due to variation of lithology and weak plane characteristics. To better reflect the physical situations, the failure surfaces ought to be determined instead of basing it on assumptions and incorporated in the existing analytical methods for stability analyses. Therefore, an analytical technique for determining counter-tilted failure surface angle has been proposed and traditional analytical model for evaluating the stability of rock slopes subjected to block toppling failure mechanisms has been modified by incorporating the counter-tilted weak plane angle. The physical slope with counter-tilted failure surface was comprehensively analysed using the modified analytical model, and results were validated using the numerical simulations models. The simulated failure mode zones are consistent with the failure mode zones obtained by the modified analytical method. The influence of relative angles of counter-tilted failure surface on the slopes' stability has been studied, and the results show that progressive increase in the counter-tilted failure surface angles leads to gradual increase in slope instability. The proposed analytical method could provide precise applications to evaluate the slope instability in rock slopes with counter-tilted failure surface.
机译：在沉积岩体浸入斜坡表面的岩石斜坡中，块体倾倒可能会导致破坏。在传统的分析模型中，假定破坏面是从上柱到坡脚趾的单一平面，这可能与由于坡度变化而使弱平面在岩石坡度内发生反倾斜的物理情况不一致。岩性和弱平面特征。为了更好地反映物理情况，应该确定破坏面，而不是基于假设，并将破坏面纳入现有的稳定性分析方法中。因此，提出了一种确定反倾斜破坏面角度的分析技术，并通过结合反向倾斜的弱平面角来修改了传统的分析模型，以评估受块体倾覆破坏机制影响的岩石边坡的稳定性。使用改进的解析模型对具有反倾斜破坏面的物理坡度进行了综合分析，并使用数值模拟模型对结果进行了验证。模拟的失效模式区域与通过改进的分析方法获得的失效模式区域一致。研究了反向倾斜破坏面的相对角度对边坡稳定性的影响，结果表明，反向倾斜破坏面角的逐渐增大会导致边坡失稳的逐渐增大。所提出的分析方法可以为评估具有反向倾斜破坏面的岩石边坡的边坡失稳提供精确的应用。

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