ABSTRACT
The overbearing reinforced concrete arch bridge has a large span capacity, beautiful appearance, and classical atmosphere, but it is not widely used in soft soil foundations because of its heavy weight, high horizontal thrust at the arch foot, and high requirement for the foundation. The horizontal thrust of arch feet was reduced by adjusting the span ratio and reducing the superstructure's dead weight, taking an overbearing reinforced concrete arch bridge as the research object. At the same time, the pile group foundation was optimized to provide suitable pusher stiffness to ensure the strength and stiffness of the arch bridge on a soft soil foundation. It is proved that reinforced concrete arch bridges can also be built on soft soil foundations with a reasonable sagittal span ratio of the superstructure, pile foundation arrangement, and deck design. It provides a reference for applying similar bridges on soft soil foundation.
