連壁築造からシールド発進までの計測・解析結果を考慮した円形立坑の挙動に関する考察

抄録

In this research, at first, the behavior of a diaphragm wall and reinforcement wall of shield tunnel entrance of a deep circular shaft was examined using a field measurement data about past underground river project in Tokyo. The data involved at the stages from diaphragm wall construction to shield tunnel construction. Next, three-dimensional total stress elasto FEM analysis was conducted to examine bending moment and axis force of the diaphragm wall. As a result, understanding a detailed movement of the shaft required the effective stress analysis that could consider the behavior of controlled underground water while the process of soil excavation within the diaphragm wall.