固化改良を併用した軟弱地盤上の既存橋梁基礎の補強に関する研究

概要

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The foundations of many old bridges are without any doubt insufficiently resistant to level-2 earthquake motion. Therefore,we propose the anti-seismic reinforcement of existing foundations resting on soft ground. This construction method yields increased horizontal and vertical resistance by driving underground walls around the existing foundation and solidifying the ground inside. We performed static loading experiments in clay layers to examine the reinforcement effect qualitatively. We also executed static loading experiments in sandy ground with centrifugal modeling equipment at a scale of 1/50 under 50 G to examine the reinforcement effect quantitatively. Furthermore,a design model that tests a frame with the finite element method (FEM) was examined and the simulations of the above experimental results were performed. The design model enabled us to simulate the load-displacement relationship with adequate accuracy.
八戸工業大学の論文
2006-02-28