Excavating apparatus, in particular for driving tunnels with large, non-circular cross-sections

摘要

The invention relates to an excavating apparatus for excavating the heading face during the driving of tunnels with large, non-circular cross-sections by the shield driving method. According to the invention, the heading face of large area is attacked by a multiplicity of excavating tools (26, 27, 65, 71) which consist of plough bodies, cutting teeth and/or driven shearing heads and the like and of which at least one excavating tool in front of the shield cutting edge produces a free cut of accurate profile. The excavating tools can be arranged on one-piece or multi-piece swivel arms (14, 50) or are guided on working platforms (62, 63, 64) which are arranged at a distance one above the other. <IMAGE>