Deepwater steel cofferdam and segment construction hydrodynamic vibration splitter plate restraining method

According to the deepwater steel cofferdam and the splitter plate restraining method for segment construction hydrodynamic vibration, the deepwater steel cofferdam comprises a steel cofferdam body and the splitter plate fixed to the outer wall of the back flow end of the steel cofferdam body, and the splitter plate is perpendicular to the surface of the outer wall, fixed to the splitter plate, of the steel cofferdam body; the two sides of the splitter plate and the steel cofferdam body are supported and reinforced through a fixing support. The steel cofferdam body is of a rectangular tetrahedral structure, the length of the longitudinal long edge in the downstream direction of the steel cofferdam body is B, and the length of the splitter plate is 1/10 B. The splitter plate is arranged on the outer wall of the back flow end of the steel cofferdam body, water flow vortexes at the rear end of the steel cofferdam body can be restrained, hydrodynamic vibration and resistance are reduced, the two sides of the split