Given the conditions found along the entire expressway that connects the city of Machico and the village of Caniçal, on the Madeira Island, specifically the topography, the urban occupation and the highly unfavorable geological-geotechnical conditions, characterized by the existence of slope deposits of significant depth with very poor resistance characteristics, different solutions had to be used for the retaining structures, specifically gravity walls, reinforced earth retaining walls with jet-grouting foundation, anchored pile walls and soil nailed walls and slopes.

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