In view of the current situation where the vibration sinking construction equipment for ultra large diameter steel cylinders is constrained by foreign enterprises,the key problems in major engineering construction should be solved.Based on the construction project of a key hydraulic engineering project in Zhoushan,Ningbo,we have collaborated with a leading domestic hydraulic vibration hammer enterprise to develop a domestically produced 12 hammer linkage large-scale hydraulic vibration hammer.Through the synchronization of hydraulic,mechanical,and electrical systems,it has successfully achieved multi hammer linkage.During the development process of the system,single hammer,double hammer,and 12 hammer group linkage tests are conducted at the manufacturing base to preliminarily verify its linkage performance.After passing the linkage test,the entire process of vibration settlement is monitored by relying on the T2 test tube of the project.By installing dynamic strain gauges,acceleration sensors and other monitoring equipment on the large cylinder,the dynamic behavior of the large cylinder during vibration settlement is monitored throughout the process.The vibration amplitude and strain characteristics of the large cylinder during vibration settlement are analyzed,and a new dynamic calculation method for working amplitude is proposed,which can achieve full process prediction of working amplitude.The research results have certain guiding significance for the localization and replacement of multi hammer linkage,as well as the analysis of the vibration sinking and hitability of ultra large diameter steel cylinders.