Based on the monitored displacement and scanned outline of island rock slope by displacement meter and 3dscanner

typical sections are selected and their stability is analyzed by the finite element strength reduction.A practical calculation method considering the effect of rainfall on the island slope stability is proposed.The effect of rainfall and toe cutting on slope stability is analyzed

and the maximum of rainfall and toe cutting for typical sections are determined.In this case

three support schemes are chosen for the typical sections

i.e.bolting support

anti-slide pile support

bolting and anti-slide pile combined support.Calculating analyses are carried out for different support schemes by using the finite element strength reduction.By comparing the safety factor of stability

plastic zone

and stress and displacement information under different support schemes

the support scheme is determined for typical sections.Finally

the economical and reasonable support scheme is obtained through the optimized calculation of some support parameters such as the dip angle

distance of bolt and anchor cable.