Abstract
The sand compaction pile method is the most frequently used methods as a countermeasure against liquefaction of sandy deposits. The authors have already proposed a method to predict the SPT N-value after compaction. It is, however, found that the method does not appropriately consider the effect of fines content of soil deposits on the compaction efficiency. This paper describes the correction of the proposed method for the fines content effect. The correction is done on the basis of the relationship between the fines content and the drainage characteristics of soils, and the drainage effect on the dilatancy behaviour of soils during cyclic loading. And it also describes the effect of the driving rate of the sand pile on the compaction efficiency by considering the effect of the driving rate on the drainage of the soil deposits.
