Development of Automatic System for Diaphragm-Wall Excavator

A diaphragm wall method needs high accuracy of excavation, and the necessity is larger with depth.The authors have developed an excavation control system, as a supporting system for large-depth excavation, in which the excavator is positioned exactly and its displacement from a designed line is controlled under 30 - 50 rom. At present, the excavation control system is a quasi-automatic system, because the manual operation is required partially. Therefore, it seems that ensuring the accuracy of excavation makes them hold in heavy tension. Hence, for the adjustment of excavator, the automatic system for a diaphragm-wall excavator, by using a fuzzy controller, is developed to save labors of construction work and advance the accuracy. The automatic system have been verified the performance same as a skilled operator through the field work. This system presents constantly the homogeneous and accurate wall without hard work and the dependence of the skills of operators.