SEPARATE TYPE SHIELD EXCAVATOR

摘要

PURPOSE:To prevent a large load from operating by a natural ground to an oscillating arm cutter when the oscillating arm cutter is stopped at the oscillation end to turn back. CONSTITUTION:Plural shield machines 13 and 14 furnishing rotary cutters 17 and 18 for excavating a natural ground at the front side are lined up in parallel under placing a specific interval. And oscillating arm cutters 20 which turn back at the rear side of the rotary cutters 17 and 18 and excavate the remaining part of the natural ground other than the part excavated by the rotary cutters 17 and 18, of the natural ground of the form to compose the section outline of the shield machines 13 and 14, are provided at the rear side of the rotary cutters 17 and 18.