RESUMO
Large ground displacements due to liquefaction are classified into two groups: (1) permanent ground displacement along a gentle slope, and (2) lateral flow near banks or seashore. Against the first group, following three categories of countermeasures are seemed to be effective: (1-A) improving the ground in all area by densification to prevent liquefaction, (1-B) strengthening structures to prevent damage, and (1-C) strengthening the ground with walls or steel piles, densification at narrow bands. And, two categories of countermeasures: (2-A) improving the ground and (2-B) strengthening quay walls or retaining walls, are seemed to be effective against the second group. Shaking table tests and some analyses were conducted to study the effectiveness of (1-C) ans (2-B) methods. Based on these tests and analyses, several appropriate methods are proposed.(AU)
