Field Experiment on Static Densification Pile Method

摘要

A new type of measures against liquefaction isdeveloped, which densifies ground by installing soil piles withstatic compaction. The by-product from construction, which isadded with a small amount of cement for stabilization, is usedfor the soil piles. This paper describes field experiment resultsof, 1) the effectiveness of thenew method on the densification ofground, 2) moduli of deformation of the improvedground, and 3)the lateral displacements of the surrounding soil. Ths main findings are1) Ths effectiveness of the new method on the densification wasvalidated with the Standard Penetration Test (SVD. Theincrements of the SPT-N value between piles were the almostsame with those of SCP method which dynamically compactedground. The increments were, however, larger inside of piles then those of SPT.2) The moduli of deformation of the ground were increased andthe densification by the static compaction was confirmed.3) The maximum lateral displacement of 55mm of thesurrounding soil was measured at 6m depth near the pile.