Method and apparatus for building pipeline.

摘要

An apparatus for building a new pipeline while breaking a plurality of existing pipelines (12) extending parallel to each other, comprises: a shield tunnelling machine (20) for performing the excavating operation while breaking opposed portions of a plurality of existing pipelines (12); and a basic thrust mechanism (22) for thrusting a new pipe (14) into a space obtained through excavation by the machine while advancing the machine; wherein the shield tunnelling machine (20) includes a shield body (24), a cutter assembly (52) disposed in front of the shield body to be rotatable about the axis parallel to the axis of the body and adapted for breaking opposed portions of the existing pipelines while the body is advanced and a pair of stabilizers (60) provided on the outer periphery of the body in such a fashion to project respectively from a pair of opposite outer peripheral portions of the body and adapted to be slidably engaged with the remaining existing pipelines opposed to each other when the body is advanced.