The International Society for Trenchless Technology
Glossary
There are 211 entries in this glossary.| Term | Definition |
|---|---|
| Obstruction |
Any object or feature that lies completely or partially within the cross-section of a microtunnel or drill that prevents continued forward progress. |
| Open Cut |
Underground construction method involving excavation from ground level to the level required for the installation, maintenance or inspection of a pipe, conduit or cable. Upon completion of the work, the trench is backfilled and the surface restored. |
| Open Shield |
A shield that allows direct access to the soil face. |
| Overcut |
The annular space between the excavated hole and the outside diameter of the jacking pipe. |
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Thematic words
trenchless technology involves installation replacement renewal underground utilities minimum excavation surface disruption several construction techniques methods details technologies successfully water sewer industrial pipelines electrical conduit fiber optics particularly attractive option urbanized heavy pedestrian traffic numerous existing crossing roadways other transportation corridors rivers waterways install rehab replace located environmentally sensitive areas