Field experiment on static densification pile method

A new type of measures against liquefaction is developed, which densities ground by installing soil piles with static compaction. The by-product from construction, which is added with a small amount of cement for stabilization, is used for the soil piles. This paper describes field experiment results of, 1) the effectiveness of the new method on the densification of ground, 2) moduli of deformation of the improved ground, and 3) the lateral displacements of the surrounding soil. This main findings are: 1) This effectiveness of the new method on the densification was validated with the Standard Penetration Test (SPT). The increments of the SPT-N value between piles were the almost same with those of SCP method which dynamically compacted ground. The increments were, however, larger inside of piles then those of SPT. 2) The moduli of deformation of the ground were increased and the densification by the static compaction was confirmed. 3) The maximum lateral displacement of 55 mm of the surrounding soil was measured at 6 m depth near the pile.