The International Society for Trenchless Technology

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Total: 26 results found.

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Method of lining with a continuous pipe for which the cross section is reduced to facilitate installation, and reverted after installation to provide a close fit to the existing pipe. ...
2. Locator
(Glossary)
An electronic instrument used to determine the position and strength of electro-magnetic signals emitted from a transmitter sonde in the pilot head of a boring system, or an impact mole tool or from existing ...
3. New Installation
(Glossary)
Construction of a new pipe or underground utility to replace or upgrade an existing system or to provide new service. ...
4. Pipe Bursting
(Glossary)
Replacement method in which an existing pipe is broken by brittle fracture, using mechanically applied force from within. The pipe fragments are forced into the surrounding ground. At the same time a new ...
5. Pipe Pulling
(Glossary)
Method of replacing small diameter pipes where a new product pipe is attached to the existing pipe which is then pulled out of the ground. ...
6. Pipe Splitting
(Glossary)
Replacement method for breaking an existing pipe by longitudinal splitting. At the same time a new pipe of the same or larger diameter is pulled in behind the splitting tool. ...
7. Rehabilitation
(Glossary)
All measures for restoring or upgrading the performance of existing utility systems including renovation, replacement or repair to overcome problems related to any aspect of performance. ...
8. Replacement
(Glossary)
Construction of a new pipe or underground utility located on or off the line of the existing systems, which serves the same function as the old system. ...
9. Spray Lining
(Glossary)
Method for applying a lining, usually of cement mortar or resin, by a rotating spray head which is winched through an existing pipeline. ...
10. Upsizing
(Glossary)
Any method that increases the cross-sectional area of an existing pipeline by replacing it with a larger diameter pipe. ...
11. CIPP Lining
(News/Guidelines)
... repairs may be required where the existing pipe is substantially deformed or damaged. After lining, the service connections or laterals are reinstated and the pipe is returned to service, usually within ...
12. Slip Lining
(News/Guidelines)
Slip lining is perhaps the oldest of all trenchless techniques. It involves the insertion of a new pipe into an existing pipe. Under the right conditions, slip lining is also the simplest trenchless technique. ...
13. Pipe Reaming
(News/Guidelines)
Pipe reaming is a trenchless method that removes the host pipe while at the same time installing a new replacement pipe. Pipe reaming can be used to replace a number of types of existing pipes and is particularly ...
14. Pipe Bursting
(News/Guidelines)
Pipe bursting and pipe splitting are trenchless methods used to replace existing pipelines in the same alignment without physically removing the existing pipeline.  Bursting and splitting by using ...
15. Spiral Wound Lining PE or PVC
(News/Guidelines)
... reinstated after lining. Grouting of the annular space is generally preferred to lock the liner in place, effectively transferig external loads from the existing pipe onto the liner and to mobilize the ...
16. Auger Boring
(News/Guidelines)
... existing casing pipe, and a new auger chain connected to the machine and to the existing chain/cutter head. The excavation and thrust process is repeated until the project is completed.  The auger ...
17. Pipe Splitting
(News/Guidelines)
Pipe bursting and pipe splitting are trenchless methods used to replace existing pipelines in the same alignment without physically removing the existing pipeline.  Bursting and splitting by using ...
18. Vacuum Excavation Potholing
(News/Guidelines)
... vacuum excavation systems may pothole to expose existing utilities where use of mechanical excavators, backhoes or boring equipment could risk damage to utilities. During construction and post construction, ...
19. Pipe Extraction
(News/Guidelines)
... than leave them in the ground. Pipe extraction is a trenchless method, which can remove existing pipes for disposal and replace them with new high density polyurethane (HDPE) or polyurethane (PE) pipes. ...
20. Potholing
(News/Guidelines)
... vacuum excavation systems may pothole to expose existing utilities where use of mechanical excavators, backhoes or boring equipment could risk damage to utilities. During construction and post construction, ...
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