Design method for reticulated micropile structures in sliding slopes : Cantoni, R; Collotta, T; Ghionna, V N; Moretti, P V Ground EngngV22, N4, May 1989, P41–47

Abstract

This article describes a design method for reticulated micropile structures adopted to stabilise sliding slopes. The method is described with reference to stabilising a slope along the Milan-Rome motorway in the Apennines near Florence. The method is based on the assumption that the structure behaves as a composite block. This assumption can be considered valid for structures built with closely spaced micropiles having appropriate arrays and well differentiated vertical inclinations. The method analyses the stability of the structure with respect to three possible failure mechanisms, evaluating the relevant partial safety factors which have to be added to the main safety factor considered in the determination of the landslide thrust. The results obtained show that, in spite of the closely spaced array and the large number of micropiles used, the stresses in the components of the structures are close to the allowable values. (TRRL)