抄録
In the renewal works of construction for the earthquake resistance and repair work, the conventional power machines such as the pitching and cutter machine generating very high noise and vibration, has been applied at the construction sites and then the environmental improvement to the worker and the resident in the surrounding was requested. On the other hand, though the water jet method has the feature in which the noise and the vibration are lowered, it has been not easy to use it for such renewal construction because the entire size and weight was very large. In our development of small-size water jet system, the entire size and the weight of system have been minimized not to generate the high noise and vibration in the design. The water jet nozzle covered with the drain collection cover not to scatter outside has been introduced. In the water jet flexible nozzle setting and moving to the object, the 7-axes manipulation robot has been applied to use it even by a narrow work space. By introducing the water jet system at the site, the lower noise and vibration work and high efficacy process of renewal construction was accomplished.
