The International Society for Trenchless Technology

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Total: 18 results found.

1. Auger Boring
(Glossary)
A technique for forming a bore from a start or drive shaft to a reception shaft by means of a rotating cutterhead. Spoil is removed back to the drive shaft by helically wound auger flights rotating in ...
2. 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. ...
3. Close-Fit Slip Lining
(News/Guidelines)
... i.e., concentric reduction/expansion liners and folded liners. Concentric Reduction / Expansion Liner Techniques can be subdivided into two categories tension deformed liners, i.e., the roller die and ...
4. Cement mortar Liner
(News/Guidelines)
... of the coating to ensure good adhesion between the liner and the pipe wall. Cleaning techniques include high-pressure water jetting, scraping, pigging, rack-feed boring, and mechanically-driven devices ...
5. Pipe Extraction
(News/Guidelines)
... A pushing device also may be attached to the back of the service line to assist in the extraction of the service. Another technique involves feeding a string of rods through the existing service line. ...
6. Mole Ploughing
(News/Guidelines)
... traditional underground construction methods requiring wide trenches. These two techniques use plows, cutter chains, or disc to open a furrow or narrow trench in which a flexible pipe or cable is inserted.  ...
7. Narrow Trench
(News/Guidelines)
... traditional underground construction methods requiring wide trenches. These two techniques use plows, cutter chains, or disc to open a furrow or narrow trench in which a flexible pipe or cable in inserted.  ...
8. Ground Pentrating Radar
(News/Guidelines)
There are a wide range of techniques available to locate buried pipes. Most of these systems use electromagnetic waves or signals transmitted into the ground or from underground utilities. These technologies ...
9. ISTT
(News/News head home)
...  What is Trenchless Technology? Trenchless technology covers any techniques, processes or procedures, including the equipment, machines and materials involved, which minimises or eliminates the need ...
10. 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. ...
...  New machine, tool, material, system or technique introduced. Student or young professional paper - Members regularly enrolled in college or university, or spending at least half their time on academic ...
12. ISTT International NO-DIGS
(Uncategorised Content)
... have promoted trenchless applications and techniques for the public benefit by offering high-quality peer-reviewed technical papers presented by trenchless experts from the world over. An associated exhibition ...
13. Awards and Recognition
(Uncategorised Content)
... project completed; (3) New machine, tool, material, system or technique introduced; and (4) Student or young professional paper. The Awards are presented yearly at the ISTT’s annual International No-Dig ...
14. 2012 ISTT No-Dig Award Winners
(Uncategorised Content)
... the rehabilitation of two parallel sewers located in the heart of the Port Elizabeth's Business District in South Africa. Originally designed to use the spiral wound technique throughout the project, the ...
15. 2014 ISTT No-Dig Award Winners
(Uncategorised Content)
... and underground infrastructures   Dr. Fuming Wang, Professor, Collage of Water Conservancy and Environmental Engineering, Zhenghou University, has developed a trenchless technique to restore the ...
16. 2015 ISTT No-Dig Award Winners
(Uncategorised Content)
... of the turbines. The pipes are more than 60 years old and lie partially under plant surface structures. The owner could not replace the leaky pipe using conventional dig-out and replace techniques ...
17. Past Winners
(Uncategorised Content)
... full compliance with all environmental and sustainability requirements. Product Herrenknecht Germany A totally new technique combining features from pipe jacking and HDD to give a one step ...
18. Affiliated Societies no
(Uncategorised Content)
... was formed in 1991 and affiliated in 1992. There are 56 members, including 14 Corporate Members. The Association has published a Handbook on trenchless techniques available in Austria and national events ...

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