关键词: 沉管隧道, 实时控制, 可编程逻辑控制器, 比例-积分-微分

Abstract: The current study focuses on the project of a leveling dredger for gravel foundation laying of the submerged immersed tunnel. The real-time monitoring of the gravel foundation laying process for the submerged immersed tunnel has been performed by using technologies such as programmable logic controller (PLC), QT and database. The closed-loop control of the process of floating and sinking of the immersed tunnel is carried out by the PLC control using the proportion, integral and differential (PID) algorithm. The real-time monitor of the process of floating and sinking of the immersed tunnel is then implemented by the design of the computer interface of the real-time monitoring system, in order to achieve the technical requirements of the high precision and the high efficiency for the gravel foundation laying of the immersed tunnel. This mode of operation is original in China.

Key words: submerged tube tunnel, real-time control, programmable logic controller(PLC), proportion integral differential(PID)