Zoning for liquefaction risk in an Italian coastal area using CPT

With a view to drawing up digitised maps of liquefaction risk along the Romagna coast, for which about eight hundred cone penetration tests (CPT) are available, four different methods based on CPT to evaluate safety factor profiles are analysed and compared. The methods considered are those proposed by (1) Robertson and Wride (1997), (2) Suzuki et a!. (1997), (3) Shibata and Teparaska (1988), and (4) Olsen (1997). The synthetic index introduced by Iwasaki et al. (1978), representative of the liquefaction potential in corre¬spondence with every profile explored by means of CPT, was employed for drawing up the digitised liquefac¬tion risk maps. Up until now, one hundred mechanical cone penetration tests have been digitised. The afore¬said four methods have been applied to these tests. A comparison of these methods points out a substantial agreement between the results.