The International Society for Trenchless Technology

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Glossary

There are 211 entries in this glossary.
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Term Definition
Uncased bore

Any bore without a lining or pipe inserted, i.e., self-supporting, whether temporary or permanent.

Upsizing

Any method that increases the cross-sectional area of an existing pipeline by replacing it with a larger diameter pipe.

Utility Corridor

Duct in which two or more different utility services are installed with access for maintenance. Also referred to as a Common Utility Tunnel, Common Duct or Utilidor.

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