Hydraulic and earth engineering – Underground passageway – e.g. – tunnel – Boring
Patent
1992-10-08
1994-03-01
Taylor, Dennis L.
Hydraulic and earth engineering
Underground passageway, e.g., tunnel
Boring
405146, 4051501, E21D 1110
Patent
active
052901254
ABSTRACT:
In a tunnel lining method an apparatus, comprising at least one excavation tool of the chain, belt or band type or the like, is positioned to coincide with the longitudinal axis of the tunnel at a point on its extrados; the tool is made to advance to a predetermined depth in a direction diverging from the tunnel axis so as to create a substantially rectangular cavity from which the tool is withdrawn; said cavity is then filled with concrete to form a cast segment; the aforesaid stages are repeated until a frusto-conical section formed from adjacent cast segments is completed, after which the material within the formed section is excavated to a depth less than the axial length of the section, and the apparatus is advanced through a distance substantially equal to the axial length of the cast segments, the stages being repeated to form each successive section in order to form a lining in which the wider final portion of one section is superposed on the narrower initial portion of the next section; during the execution of one section of cast segments a second tool associated with said first tool executes consolidation/tamping injections with concrete or the like into the region which is to constitute said next section.
REFERENCES:
patent: 3407609 (1968-10-01), Kosogorin
patent: 3413811 (1968-12-01), Giacobino
patent: 5129764 (1992-07-01), Casagrande
patent: 5152638 (1992-10-01), Trevisani
English language abstract of Italian Patent Application No. 3446A/89.
Taylor Dennis L.
Trevi S.P.A.
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