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由于地质和结构特征的不同造成的边坡变形破坏机制存在差异以及同一边坡在不同施工开挖阶段的变形规律和量值也存在差别,采用工程类比方法获得的单一的静态的边坡监测预警指标无法表达某一边坡在施工开挖过程中动态的变形规律和特征,针对该问题提出了基于设计安全系数和破坏模式的边坡开挖过程中动态变形监测预警指标的研究思路和方法,并将其应用于糯扎渡水电站溢洪道消力塘边坡755～740m开挖过程变形监测预警指标的确定,通过与现场监测结果的对比分析表明,该边坡开挖过程中是稳定的,分析与工程实际是相符的。研究表明,基于设计安全系数和破坏模式的边坡开挖过程动态监测预警指标的研究思路和方法用于边坡在开挖过程中动态变形监测预警是可行和有效的。
Due to the differences in the deformation and failure mechanisms of the slope caused by the different geological and structural features and the different deformation laws and values of the same slope during different excavation stages, a single static slope monitoring and warning The index can not express the dynamic deformation rules and characteristics of a slope during construction excavation. Based on the design safety factor and failure mode, this paper puts forward the research ideas and methods of dynamic deformation monitoring and warning indicators in the process of slope excavation The application of this method in the deformation monitoring and early warning index of 755 ~ 740m excavation of Spillway Squatting Spillway of Nuozhadu Hydropower Station shows that the slope stability during the excavation process is stable, The actual project is consistent. The research shows that the research ideas and methods of dynamic monitoring and early warning index for slope excavation process based on design safety factor and failure mode are feasible and effective for monitoring and predicting dynamic deformation of slope during excavation.