Method and apparatus for constructing underground structure

摘要

A method and an apparatus for constructing an underground structure by having a plurality of serially adjoining cylindrical bodies propelled underground one after another either in one direction or from opposite directions. A thrusting/pulling jack advancing arrangement, thrusting jack and pulling jack advancing arrangements, connecting and traction members, fixing pieces and fasteners are used in combination to propel each cylindrical body one by one by virtue of a sum total of reaction forces developed at other cylindrical bodies and some additional reaction facility, if necessary.