JET EXCAVATING DEVICE

摘要

In an excavation direction, an excavating device forms a channel of predetermined cross section in the ground. The excavating device comprises an assembly of jet excavating units which together define the cross section of the channel and are each provided with at least one jet device. The excavating device also comprises at least one sensor which is connected to at least one of the jet excavating units for measuring a force which is exerted on the jet excavating units by the ground substantially parallel to the excavation direction. Control means are provided for controlling the excavation by the excavating device on the basis of the force measured by the at least one sensor. The control means are adapted to set a flow rate of jet liquid which is used in at least one jet device.