ANALYTICAL STUDY ON COUNTERMEASURE OF UNDERGROUND LINEAR STRUCTURE SUBJECTED TO FAULT DISPLACEMENT

Abstract

 Countermeasure of underground structures such as tunnels against fault displacement is not established in design, but several one are presented in some studies. In this paper, to verify the effect of those countermeasure constructions against fault displacement under various conditions of the displacement direction, parametric studies using 3D FEM are conducted, and the critical displacement direction and the most effective countermeasure for circumferential bending moment, shear force and axial force of structure are estimated. As a result, it is verified that the most critical direction of fault displacement and the most effective countermeasure depends on the evaluation force.