Review Article

Stability Monitoring and Analysis of High and Steep Slope of a Hydropower Station

Table 4

Warning level and warning criteria.

Warning levelDanger forecastLevel 1 criteria:
cumulative increment
Secondary criterion: daily slip of sliding force

BlueStability0~5010~20 up to yellow20~35 up to orange>35 up to red
YellowSubstable50~120
OrangeNear slip120~160
RedImpending slide>160

Anchor force ; sliding force increment ; initial prestress .