Abstract
Gravel collapse caused by instability of dangerous rock mass is one of the common geological disasters in mountain highway. Identifying the safety and stability of dangerous rock and adopting corresponding treatment measures have great significance for ensuring the safety of mountain roads. Based on the field investigation of dangerous rock mass on the secondary road, the author found that the in stability and failure modes of dangerous rock in a mountainous were mainly slipping and dumping. This paper uses the limit equilibrium method to analyze the stability of the dangerous rock and verifies the safety factor of dangerous rock mass under different working conditions. According to the analysis results, the treatment measures of removing, anchoring and laying active protective net are put forward by the author, which provides a reference for the design, construction and research of similar projects.
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