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本文从分析地形、地貌和工程地质条件入手,运用弹塑性平面有限元计算结果,剖析了猴子岭斜坡的变形机理和可能破坏形态,进而建立了斜坡两底板的滑动极限平衡方程式。在考虑了地震力的最不利方向和T_(0-6)84万m~3危岩崩塌情况下,对斜坡稳定作出了定量评价。其中包括:自重单独作用下的安全系数M>1.4;自重和地震力共同作用下M>1.1;84万m~3危岩崩塌荷载作用下M>1.1。最后,对定量分析结论的可靠性作了讨论,指出对T_(0-6)危岩进行分阶段整治仍然是十分必要的。
This paper starts with the analysis of topography, geomorphology and engineering geology conditions. Using the elasto-plastic plane finite element calculation results, the deformation mechanism and possible failure modes of the Monkey Ridge slope are analyzed, and then the sliding limit equilibrium equations of the slopes are established. Taking into account the most unfavorable direction of seismic forces and the collapse of T_(0-6) 840,000 m3 of dangerous rock, a quantitative evaluation of slope stability was made. Including: the safety factor under the action of self-weight alone M> 1.4; under the combined effect of self-weight and seismic forces M> 1.1; 840,000 m3 under the action of the dangerous rock collapse load M> 1.1. Finally, the reliability of quantitative analysis conclusions is discussed, and it is pointed out that it is still necessary to carry out phased remediation of T_(0-6) dangerous rock.