Tunnel-lagging element and system

Details Tunnel-lagging element and system Tunnel-lagging element and system

1977-05-05

1978-09-12

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Lining

52640, 52653, E21D 1114, E21D 1118

Patent

active

041126947

ABSTRACT:
A tunnel-lagging element, adapted to be embedded in spray or injection concrete for the lining of the wall of a tunnel, comprising a pair of reinforcing bars which are held substantially against the tunnel wall, and a further pair of such bars spaced from the bars of the first pair. The bars at the central third of their lengths are fixed to one another against relative movement by straps while, toward the ends of the element, the bars of the two pairs are held together with limited freedom of longitudinal movement. The entire assembly of bars and straps can be embedded in the concrete lining.

REFERENCES:
patent: 1105776 (1914-08-01), Haskell
patent: 1485811 (1924-03-01), Pederson
patent: 1659035 (1928-02-01), Lovell
patent: 2179554 (1939-11-01), Hadley
patent: 3126708 (1964-03-01), Jasper
patent: 3381479 (1968-05-01), Curzio
patent: 3462959 (1969-08-01), Mallander

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