Abstract:In the process of reconstruction and reinforcement,part part structural form was changed, this would affect sluice stress. The influence on the sluices stress becase of the chang of traffic bridges is studied in this paper.Based on a sluice in Jiangsu as an example, the software was used to establish a three-dimensional finite element model under two kinds of situations of arch bridge and slab bridge,and to calculate the stress of the floor and the data was analyzed and compared the influence in different forms of traffic bridges on the invert arch floor. The results show that the slab bridge will make the floor's stress become larger in the arch foot, and the stress concentration is formed near the arch foot, thereby causing cracks in the floor.