| 摘要 |
PCT No. PCT/EP88/00721 Sec. 371 Date Apr. 27, 1989 Sec. 102(e) Date Apr. 27, 1989 PCT Filed Aug. 12, 1988 PCT Pub. No. WO89/02009 PCT Pub. Date Mar. 9, 1989.A method and apparatus for installing an underground seal beneath a garbage dump in a strip-like manner. The earth is worked in strips under the garbage dump by the front end of a driving shield. The earth is transported to the rear end of the driving shield, and is compressed at the rear end. A strip-like layer of a waterproof material is inserted, under the protection of a cover of the driving shield. A supply tunnel pipe is constructed and subsequently dismantled, comprised of individual tunnel pipe sections, under the protection of the cover while the driving shield is moved forward. The dismantled tunnel pipe sections of the tunnel pipe are used to erect an additional tunnel pipe which is laterally displaced in a direction toward the next strip-like layer opposite the first one tunnel pipe behind the driving shield. By stabilizing the dismantled pipe sections they need not be dragged along or transported out of the remaining tunnel pipe. |
