Development of an Automatic Shield Excavation System

The posture of the shield machine must be accurately controlled for constructing a tunnel on the planned line in shield constructions. This posture control consists of the “Linear Excavation Alignment Control” that decides the progress of excavation and the “Directional Correction” that decides the mode of operation. We have developed a new “Automatic Shield Excavation System” for automatic posture control of the shield machine during shield excavating operations. This system is reported here.