The International Society for Trenchless Technology

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Total: 33 results found.

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1. Hose Lining
(Glossary)
... to the service pressure expanding the liner until it contacts the wall of the host pipe.  ...
2. Inflow
(Glossary)
Flow which enters the sewer generated by rainfall or an industrial discharge or other particular connection. Water discharged into a sewerage system and service connections from sources on the surface ...
3. Live Insertion
(Glossary)
Method of installation of a liner while the product pipe remains in service. ...
4. Locator
(Glossary)
... underground services which have been energised. Sometimes referred to as a Walkover System. ...
5. Narrow Trenching
(Glossary)
Method of excavation of a trench up to 100 mm wider than the outside diameter of the service to be installed, usually employing either a rockwheel or chain type trencher. ...
6. New Installation
(Glossary)
Construction of a new pipe or underground utility to replace or upgrade an existing system or to provide new service. ...
7. Product Pipe
(Glossary)
Pipe used for the conveyance of water, gas, sewage, and other products and services. ...
8. Utility Corridor
(Glossary)
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. ...
HDD is an extremely versatile trenchless technology that is used for the installation of everything from service connections to residences and buildings, to pipes and cables under roadways and rivers. ...
10. CIPP Lining
(News/Guidelines)
... pipe such as egg shapes, ovoids, and box culverts can be lined. Lining with CIPP removes the pipe from service for the duration of the installation and reinstatement process so overpumping or provision ...
11. Slip Lining
(News/Guidelines)
... to the host pipe have higher compressive strengths than grout used only to restrain the liner. Forces on the liner during grouting may be greater than what the liner will encounter during normal service. ...
12. Joint Grouting
(News/Guidelines)
... packers, sized to the section of the pipe or service connection, to isolate the joint to be grouted from the rest of the sewer system allowing the controlled application of grout only to the part of the ...
13. Pilot Tube
(News/Guidelines)
... such as service laterals. The pilot tube is launched from a manhole or pit. Once the pilot tube string has reached the recovery pit, a service lateral is pulled in as the pilot rods are extracted. The ...
14. Vacuum Excavation Potholing
(News/Guidelines)
... of cables and utility services.   ...
15. Pipe Extraction
(News/Guidelines)
...  There are several systems that have been developed to remove existing service lines while at the same time replacing them with a new pipe. Most all involve pulling out the existing pipe while simultaneously ...
16. Mole Ploughing
(News/Guidelines)
Mole ploughing and narrow trenching are not trenchless technologies but they both create narrow temporary trenches for installing small diameter services that minimize the adverse impact associated with ...
17. Flood Grouting
(News/Guidelines)
... seals removed, and sewer section returned to service.  ...
18. Narrow Trench
(News/Guidelines)
Mole ploughing and narrow trenching are not trenchless technologies but they both create narrow temporary trenches for installing small diameter services that minimize the adverse impact associated with ...
19. Woven Hose Lining Epoxy Bonded
(News/Guidelines)
... liner to the host pipe. Once inserted, the woven hose liner is inflated to the service pressure expanding the liner until it contacts the wall of the host pipe. Woven hose liners are fully structural up ...
20. Leak Detection
(News/Guidelines)
... The system most suited for the job will depend on the type of utility service to be investigated, the area of investigation, and the nature of the problem. All leak detectors use the acoustic profile ...
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