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tunnel liner

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tunnel liner [′tən·əl ‚līn·ər]
(civil engineering)
Any of various materials, especially timber, concrete, and cast iron, applied to the inner surface of a vehicular or railroad tunnel.
(mining engineering)
The timber, brick, concrete, or steel supports erected in a mine tunnel to maintain dimensions and safe working conditions.
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75 per cent owned by ABDLP) has already tapped into that job potential with a recently signed contract to supply the Cigar Lake mine with high-strength concrete tunnel liners.
Athabasca communities seize investment opportunity: strategically ... by Karpan, Robin / SaskBusiness
The report points to several problems that may combine to dramatically weaken the strength and durability of the walls in some areas: A plastic polyethylene tunnel liner, supposed to be impermeable, has torn in many places, leading to numerous leaks.
SUBWAY TUNNEL WALLS AT RISK, REPORT WARNS : MTA OFFICIALS SAY ... by Daily News (Los Angeles, CA)
Schuff International also manufactures short- and long-span joists, trusses, and girders as well as specializes in the fabrication and erection of large-diameter water pipe, water storage tanks, pollution control scrubbers, tunnel liners, pressure vessels, strainers, filters, separators, and a variety of customized projects.
Schuff International Announces That Witherspoon Acquisition Corp. ... by Business Wire
 
 
 
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