The elements or materials that constitute the exposed surfaces of a tunnel interior can be described as the finish of a tunnel. In tunnel work, the same term refers to elements installed after completion of the structural lining that constitute an integral part of the complete tunnel interior, often in a separate “finish” contract. Tunnel finish work can include wall and ceiling finish materials and support systems; tunnel roadway pavement, barrier curbs, sidewalks/safety walks, and railings; utility niche frames and doors, doors and frames for cross-passageway utility closets, used increasingly in lieu of sidewall niches; and police booths or sidewalk patrol cars. All can be considered finish work, and are discussed in this chapter.
KeywordsDust Welding Steam Epoxy Shrinkage
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