岩质高边坡稳定性分析及加固措施研究

Stability Analysis and Reinforcement Measures of a High Rock Slope

在对某岩质高边坡进行工程地质条件分析的基础上,确定了该岩质高边坡潜在的破坏模式,即为沿着顺坡向结构面的滑动,由此建立了对应的稳定性分析模型,采用严格极限平衡M-P法进行了整体稳定性分析,依据计算结果对不稳定滑体进行了锚索加固,并对加固后的坡体进行了稳定性分析。计算结果表明:边坡开挖后,在坡体自重、暴雨和地震3种状态下,边坡均处于欠稳定状态,分析了边坡失稳机理,评价了不同潜在滑体的稳定性并最终确定了最危险的滑体位置;采用锚索加固后,3种工况下,边坡均满足相关规范的稳定性要求,并提出了锚索加固前后应注意的施工事项,可为类似工程施工安全提供参考。

Based on geological conditions of a high rock slope,the potential failure mode of the slope is evaluated,which belongs to the sliding failure along the structural plane.Then,the stability analysis model is established,and the rigid M-P method is utilized to analyze the stability of the high rock slope.Furthermore,the high rock slope was reinforced by using ground anchors.The stability was also assessed after the reinforcement.The analytical results show that,after the excavation,the high rock slope was unstable under the three working conditions,namely,natural state,heavy rain,and earthquake conditions.Moreover,the potential failure characteristics was analyzed,the stability of different potential sliding body was evaluated,and the most dangerous sliding body was determined.After the reinforcement,the high rock slope met the safety requirements of the relevant specifications.The construction recommendations are proposed when the slope was excavated and reinforced,which can provide the construction reference for similar the high rock slope.