To address the common problem of the poor apparent quality of exposed concrete in the second-phase permanent projects of ship locks，this study takes the floating bollard groove as the research object to investigate the feasibility of changing the concrete pouring process from two-time pouring to one-time pouring. Specifically，it simulates and analyzes the mechanical properties of the one-time pouring formwork structure with finite-element software and compares the results with those of engineering examples. This research shows that mechanical properties calculated through finite-element software simulation meet the specification requirements and are consistent with the actual results，which verifies the feasibility of one-time pouring. The proposed method has been successfully applied to the Xiangqi second-line ship lock，and it can provide a reference for the construction of similar floating bollard grooves of ship locks.