The semi-circular structures were used as part of the dam body of Baimaosha waterway regulation engineering of the Yangtze River deepwater channel phase I project.According to the actual working conditions,this paper analyzed and compared different options of dike structure types,and recommended the semi-circular structures as a selection scheme.Based on this,the force and construction of semi-circular structures were further analyzed and the results were shown and verified by practice.The practical application showed that the structures owned the feature of excellent stability,and well achieved the functional requirements of the engineering.