Development of an Excavation Accuracy Control System for Diaphragm Walls

Recently, construction has been automated and labor- saving, and diaphragm walls have be come much deeper. In view of this, we have developed an accuracy control system for installing diaphragm walls, using a horizontal multi- axial rotating cutter for excavating. Using this system enables high- accuracy excavation easily. The system comprises two control functions, one for primary excavation, the other for excavation accuracy. Characteristic of the excavation accuracy control unit is that the wires for detecting cutter position are always kept vertical and automatically follow the cutter. In this study, we confirmed, through static ability and field testing, that these devices are extremely useful for excavation control.