ABSTRACT
Mechanically stability earth (MSE) walls have been widely used as bridge abutments due to the advantages of reducing both the construction space saving and the bridge span. This paper presents a case study of an MSE wall with embedded bridge-supporting piles in Anhui, China. Instead of using traditional isolation casing, innovative geogrid treatments were taken to bypass the piles embedded in the MSE wall. The facing deformations, including both lateral displacements and settlement, were monitored for eight months after the completion of construction using a machine vision monitoring system. Monitoring data indicated that both the lateral displacements and settlements of the wall facing increased with time until six months after construction. The rainfall resulted in a small increase of the lateral deformations. In the horizontal direction of facing, both the lateral displacements and settlements at different elevations had an obvious increase from the wing wall to the road centerline. Overall, the deformation of the wall facing was stable and far less than the design limit value, indicating that the MSE wall with embedded bridge-supporting piles showed good service performances after construction.
