The successful cases about soil liquefaction mitigation are reviewed

in the sites of the 1989 Loma Prieta

USA earthquake

the 1993 Kushiro-Oki

Japan earthquake

the 1994 Hokkaido Toho-Oki

Japan earthquake

the 1995 Hanshin

Japan earthquake

the 1999 Chi-Chi

Taiwan earthquake

the 1999 Kocaeli

Turkey earthquake

the 2001 Nisqually

USA earthquake and the 2011 great east Japan earthquake

and the applicability and performance of various mitigation measures are analyzed. The lessons we have learned from these successful cases of soil treatment include: (1) for bay areas or reclaimed lands

the ground treatments against soil liquefaction are indispensable; (2) the choice of soil liquefaction countermeasures should be based on the consideration of site conditions

economic conditions and the environmental conditions; (3) compacted sand piles and stone columns are widely used

which have become mature and economical technics

and they are suitable for improving liquefaction-prone soils in the seismic intensity VIII zone and below; (4) the dynamic compaction method is simple and less expansive

and this method is especially suitable for large fields in the seismic intensity VIII zone and below; (5) grouting

deep soil mixing and jet grouting methods are effective in mitigating the earthquake-induced liquefaction damages in the seismic intensity IX zone and below; 6) the combination of various liquefaction countermeasures is more effective than an individual measure. If possible

multiple methods should be used in combination to achieve better effects.