Dynamic Response Characteristics of Double-Row Suspended Steel Sheet Piles on Nearshore Slope under the Impact of Pile Hammer

During the construction process of pile driving on nearshore slope, it is crucial to accurately assess the impact of dynamic loading from the pile hammer on the stability and safety of the slope’s supporting steel sheet pile structure. In the case of the first phase of the dock project at Huarong, a dynamic finite element numerical simulation method was employed to establish a computational model for the double-row suspended steel sheet pile structure. Through field vibration testing verification, the dynamic response characteristics of the double-row steel sheet piles under the influence of pile hammer impact were analyzed, enabling the evaluation of the safety of the double-row steel sheet piles. The research findings revealed that the displacement deformation of the steel sheet piles had little correlation with the impact location of the hammer. The maximum displacement of the lower row of steel sheet piles was 3.14 cm, while the maximum displacement of the upper row was 2.51 cm. The maximum principal stress had no significant relationship with the impact location, and the maximum principal stress of both the upper and lower rows of steel sheet piles was less than 20 MPa. The maximum von Mises stress occurred at the intersection between the steel sheet pile and the vertical line passing through the impact point of the hammer. The maximum von Mises stress for the upper row of steel sheet piles was 20.85 MPa, while for the lower row it was 25.40 MPa. The displacement deformation and stress of the double-row steel sheet piles remained within the safe control range.