藏木水电站炸药库边坡稳定性监测分析

Monitoring Analysis of Stability of Zangmu Dam Explosive Magazine Slope

边坡的失稳破坏,都有一个从渐变到突变的发展过程,在破坏前会显示出一些即将破坏的征兆。坡体的位移是观测的最主要、最直观的物理量。通过藏木水电站炸药库后边坡安装精密的仪器对坡体的变形进行监测,捕捉坡体变形稳定性的异常信息。根据监测资料综合分析结果,该边坡的稳定性与坡体的岩土结构类型密切相关,具有分区的特点。边坡上部整体不稳定;边坡中部整体欠稳定,高速振荡时,变形速率尚未超限,但由于坡体岩土结构类型不佳,仍存在超限加速的可能;边坡下部整体基本稳定,但变形速率有所增加。

The instability damage of slope is a development process from the gradual change to mutation. It shows some signs of the damage before destruction. Displacement of the slope is the most important and intuitive physical quantity. By installing precision instrument to monitor slope deformation, we may capture the exception information of stability before slope body destroying, and can timely find problems and take measures for processing. According to the comprehensive analysis of monitoring data of Zangmu dam explosive magazine slope, the slope stability is closely related to the slope geotechnical structure types, and the slope stability has the characteristics of the partition. The upper overall slope is unstable; and the middle overall slope is under- stable, under high speed oscillation, and the deformation is not overrun, but due to the poor slope geotechnical structure type, it still may overrun and accelerate; lower overall slope is basically stable, but the deformation rate increases.