Abstract:

Due to the specific geological conditions of different projects, modifications shall be made on the control systems of the shields to be used so as to fit for the geological conditions. Analysis is made on the PLC control system and PcVue manmachine interface and the functions are expounded, with the modification of the tail sealing control system of the NFM shields used for Qiantang River Crossing Tunnel on Qingchun Road as an example. In the end, the tunneling requirements are met due to the improving of the efficiency of the control system of the shields.

Key words: NFM slurry shield, tail sealing, PLC, PcVue, modification