Seismic performance of multi-anchor wall with double-wall facing

Abstract

Damage to the embankments of abutment backfills often affects emergency routes by introducing sharp drops in the road level between the bridge and backfill. Therefore, it is important to clarify the seismic performance of abutment backfills with reinforced double-wall facing to maintain the road level. The length of the necessary tie-bars is determined by the internal stability of the reinforced area. It follows that anchor plates may be installed in intersecting or binding configurations, which are not ordinary conditions, depending on the width of the road. In this study, a series of centrifugal shaking table tests was performed to investigate the seismic behavior of a multi-anchor wall with double-wall facing. The test results showed various deformations with different reinforcement positions; perpendicularity was best maintained when using a binding tie-bar configuration. Smaller deformation was observed for a wall using intersecting anchor plates compared to that using an ordinary configuration. This implies that crossing the reinforcement areas can improve, rather than adversely affect, the stability of the full structure.