縦打ち補強土工法を適用した実大試験盛土の力学挙動と補強効果

摘要

The reinforced soil method by vertical micro-piles which constructed from the top of slope enables the space-saving construction. The method can be utilized in the neighboring work and the maintenance work of infrastructure. While there are some precedents of micro-piles of such applications, the reinforcement mechanism has yet to be clarified. Therefore, to clarify the mechanical behaviour of the reinforced soil method by vertical micro-piles, the full-scale test embankment was conducted with the different pile angles and the pile spacing under the condition corresponding to the assumed slip line. The measured behaviour showed that the effect of suppressing the displacement was high in the case with raking pile on the front side. For the sectional force of micro-pile, the axial compressive force and the bending moment according to the deformation were measured. Regarding the overall behavior, the three dimensional FE analysis was carried out to evaluate the validity of measurement and the reinforcement effect.