Excavation with stepped-twin retaining wall: Model tests and numericalsimulations

摘要

Braced excavation using stepped-twin retaining wall is becoming popular in Japan.As it is a newtechnique used to prevent movements of double-elevated ground, mechanism of deformation due to excavationand change of stresses have not been fully understood. The design methodology of this technique is also notproperly established. In this research, two-dimensional model tests are conducted to investigate the deformationmechanism of the ground and the earth pressure of the stepped-twin retaining wall. Numerical simulations withfinite element method are also carried out for the same scale of the model tests. The aim of the research is to makeclear the mechanism of the braced excavation using stepped-twin retaining wall and to establish an effective wayto evaluating the mechanical behaviors of the retaining wall and the surrounding ground.