Finite-element and limit equilibrium analyses of a stabilised natural high slope

In this paper, the stabilisation of a 60 m-high natural slope located in Fujian Province in southeast China is analysed using finite-element and limit equilibrium methods. The strength reduction finite-element analysis was able to capture the behaviour of the slope before stabilisation and its performance after stabilisation. The factors of safety obtained with the two different approaches are compared and discussed in this paper. Deformation analysis was also conducted to investigate the serviceability of the slope during the stabilisation construction activities. The results show that the combination of slope flattening and ground anchors was able to provide the required stabilisation while satisfying serviceability requirements, as the deformations at the crest and toe of the slope were within tolerable limits.