The multi-hammer synchronized vibro-driving technique for large-diameter steel cylinders has been widely employed at home and abroad due to its high speed,short construction period,and cost-effectiveness.Currently,most domestic projects utilize the American eight-hammer synchronized system,without recorded engineering cases of domestically produced twelve-hammer synchronized hydraulic vibro-hammer groups being applied to steel cylinders exceeding 20 m in diameter and 50 m in height.This paper focuses on a project at Ningbo-Zhoushan Port,conducting key technical research on vibro-driving for large-diameter steel cylinders,addressing critical challenges such as clamping,unwrapping,hoisting,positioning,sinking,and rectification.Through vibro-driving analysis and equipment comparison,this paper proposes an innovative vibro-driving large-diameter steel cylinder solution based on a domestic twelve-hammer synchronized system,resulting in a comprehensive construction methodology.Additionally,this paper builds a positioning and rectification technical workflow,along with parameter control measures.The results show that all the indicators of the steel cylinder vibration sinking meet the design requirements.This project serves as a high-quality demonstration for the application of domestically manufactured vibro-hammer equipment.