CONSOLIDATION AND REFURBISHMENT OF THE ROAD SECTION OF VIA COLOMBO THROUGH THE REALISATION OF: DRAINING TRENCH NEAR THE GBBIONATE SIDE OF THE VIA COLOMBO; RECLAMATION OF THE LANDSLIDE SECTION BY REPLACING THE EXISTING EMBANKMENT OF THE OLD GABION WITH SUITABLE ARID MATERIAL CONSTIPATED AND COMPACTED AND CHARACTERISED BY GOOD PERMEABILITY; GABIONS OF CONTAINMENT OF THE MONTE SIDE OF THE VIA COLOMBO, ARRANGED ON SEVERAL ROWS SUITABLY SEPARATED; SUPPORT WALL ON POLES OF VARIABLE DIAMETER FROM 600 MM TO 1000 MM FIXED IN THE GROUND FOR M. 16,00