Calculation of micropiles and anchors to reinforce a slope in emergency situations: application in Málaga, Spain

Abstract

The importance of preserving affected buildings and infrastructures to landslides is a critical problem in some areas. A system that is less invasive than traditional concrete diaphragm walls or piles is proposed in this work. The proposed system consists of the execution of a row of micropiles and anchors with a methodology of calculation based on the Spencer's limit equilibrium method. Micropiles, as a possible measure for rapid reinforcement of a slope, are always designed in groups. Slope stability analysis automatically employs the pore pressures calculated in groundwater analysis. After a landslide is reinforced, the stability coefficient of the landslide can be increased from 0.907 to 1.504 with the application of our developed model in the application example in Málaga, southern Spain. The results of the proposed model show that a row of micropiles and anchors can effectively enhance the landslide stability in emergency cases. The results and conclusions are helpful in providing a theoretical foundation to clarify the failure mechanism and provide a reference for the design of micropiles and anchors for landslide events.