Since its very construction, the 500-m Open Cut of the Corinthos-Patra Highway (in Southern Greece) at the Derveni area was experiencing periodic slope instabilities. The later were attributed to the presence of two non-detected (by the time of the original construction) sliding surfaces: a shallow sliding plane (depth about 5m) and a deep seated surface (at a depth of 13-15m below ground). In this project we acted as exterior consultants to:
Assess the adequacy of the constructed remediation measures (i.e. two rows of piles connected with a rigid pile cap and a single, and two single-pile rows uphill and downhill); Estimate the safety margins accounting for infrequent flood events; Assess the performance of the remediated cut under different earthquake scenarios (probable and less frequent seismic actions).