ABSTRACT
In this paper, we present a study of a large slope failure, which endangered the construction of a bridge, occurred in 24 m deep cutting with a main scarp upper edge extending over 70 m in length. The stability analysis is discussed, with a critical analysis of safety factors, according to the Eurocode. The important place takes the analysis of slope stability during construction, but also the analysis of long-term conditions, back-analysis, in anthropogenic site, conditions that are not completely covered by geotechnical codes. Lessons learned showed, that a design basis in such an anthropogenic environment should ensure an advanced geotechnical characterizations and parametric engineering assessments. Even in such a case, it will be necessary to acknowledge the risk of slope instability by all stakeholders, mainly due to uncertainties associated with a construction of clayey mine spoil heaps and a subsequent mechanical properties heterogeneity of stockpiled soils. The role of geotechnics is inevitable in such “natural” conditions of mine spoil dumps to provide necessary support throughout entire project life cycle.
