Dynamic Responses of Immersing Tunnel Element during Freeboard Elimination

摘要

To ensure that the tunnel elements can be immersed and landed safelyand accurately, an experimental study with scale model tests wasperformed to investigate the dynamic responses of the immersingtunnel element under random waves. The experimental measurementsrevealed quantitatively the dynamic behavior of tunnel element underdifferent wave climates and negative buoyancy. From the results, thedynamic response of the tunnel element was most severe during thestage of freeboard elimination. Thus, an important conclusion is that thefreeboard elimination scenario should be checked against cablebreakages and the stability of the tunnel element in the design stage,which has not been highlighted in the past literatures.