The International Society for Trenchless Technology

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Total: 6 results found.

1. 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. ...
2. Joint Grouting
(News/Guidelines)
... localized defects. A chemical mix is used for flood grouting of a large section of sewer mains and laterals. In both cases the host pipe should be cleaned. Localized grouting involves the use of inflatable ...
3. Pilot Tube
(News/Guidelines)
The pilot tube process, as its name suggests, involves the controlled installation of hollow tubes on a precise line and grade through displaceable ground. The guidance system consists of a digital theodolite, ...
4. Pipe Extraction
(News/Guidelines)
... pulling in the new pipe. An example of a typical pipe extraction system involves a steel cable fitted with cones that can be expanded to grip the internal wall of the existing service line. The cable is ...
5. Why Trenchless? ('No-Dig')
(Uncategorised Content)
Trenchless Technology involves the installation, replacement or renewal of underground utilities with minimum excavation and surface disruption. Several construction techniques and methods qualify as trenchless. ...
6. Past Winners
(Uncategorised Content)
...   USA The City of Portland East Side Combined Sewer Outflow Project* is the ISTT 2009 Project Award winner. This project involves the installation of approximately 3,000 ft (910 m) of 84-inch ...

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