Abstract:

When segments are erected, the thrust cylinders can be extended and/or retracted under segment erection mode. Remote controllers are always used to control the thrust cylinders. There are two kinds of remote controllers: one has thrust cylinder selecting switches on the control panel, which, due to the congested space on the control panel, is inconvenient in operation; another has segment selecting switches on the control panel, but for the sake of safety, the thrust cylinders can only be extended and retracted once, which causes inconvenience to the position adjusting of the segments. A new thrust cylinder remote controller, to which no more selection switches have been added, is proposed in the paper. By means of the proposed remote controller, the thrust cylinders can be controlled automatically, e.g., the position of the segment can be adjusted freely by means of the thrust cylinders when the erection of the segment is not completed; the thrust cylinders can neither be extended nor retracted any more when the erection of the segment is completed. Due to the application of the proposed remote controller, the segment erection time is reduced, the segment erection operation is simplified and the construction safety is guaranteed. 

Key words: erection mode, thrust cylinder, automatic control, shield machine, segment