The International Society for Trenchless Technology

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Total: 20 results found.

1. Breakout Wrench
(Glossary)
Manual or hydraulic tool used to connect or break tool joints at access points forward of the drill rig.  ...
Renovation method which seals a length of pipeline between two access points by employing a chemical solution pumped into the pipe and surrounding ground. Such systems perform a variety of functions including ...
3. Closed Shield
(Glossary)
A shield with a closed pressure chamber or cutting head which does not allow direct access to the face. ...
4. Localised Repair
(Glossary)
Repair work on a pipe, particularly sewerage, for lengths less than the run between two adjacent access points. ...
5. Open Shield
(Glossary)
A shield that allows direct access to the soil face. ...
6. Tunneling
(Glossary)
A construction method of excavating an opening beneath the ground without continuous disturbance of the ground surface and of large enough diameter to allow individuals access and erection of a ground ...
7. 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. ...
8. CIPP Lining
(News/Guidelines)
... by winching into place through a manhole or specially prepared access point and inflated to come into close contact with the circumference of the existing pipe. The liner is restrained in any intermediate ...
9. Flood Grouting
(News/Guidelines)
... plugs. The sewer is filled with the first of two chemical solutions from a manhole or access point. Hydrostatic pressure forces the solution into the soil surrounding the sewer at defect points. The first ...
10. Leak Detection
(News/Guidelines)
... small and large diameter pipes but are best suited for surveying large-diameter transmission mains, which transmit sounds poorly and have limited access points. The acoustic sensor of the tethered system ...
11. Join ISTT
(Uncategorised Content)
... membership annual dues are £70 ($115). ISTT members are entitled to access the services provided members on the ISTT website to include free downloads of technical papers and reports from the Technical ...
12. Why Trenchless? ('No-Dig')
(Uncategorised Content)
... sensitive areas and locations where surface access may be restricted due to the existence of structures or vegetation.   Often, trenchless techniques are the only viable construction option. ...
13. Programs and Activities
(Uncategorised Content)
... on the Colloquium is provided on the dropdown – Research Support. Trenchless Information. A strategic component of the education and training mission of ISTT is information. Not everyone has access ...
14. 2011 ISTT No-Dig Award Winners
(Uncategorised Content)
... in a densely populated residential district with narrow rights-of-way. The project had to be completed within 40 days, without unduly restricting access to residential property, and in temperatures that ...
15. 2013 ISTT No-Dig Award Winners
(Uncategorised Content)
... capacity, Deal with a significant bend, Handle high water table, pipe flows, and Long distances between access‐points (200 metres). Interflows solution: Employ a bigger, ...
16. 2014 ISTT No-Dig Award Winners
(Uncategorised Content)
... the installation of two shafts. One shaft was used to over-pump wastewater flow from the Ham to the Wick sewer, and the other served as an access shaft for installation of the liner.   The liner was ...
17. 2015 ISTT No-Dig Award Winners
(Uncategorised Content)
...    IMS Robotics IMS Sewer to Lateral (STL) system rehabilitates household sewer connections without entering the property. The IMS STL system accesses the lateral or service connection from the ...
18. ISTT Photo Competition
(Uncategorised Content)
... technologies and geographical locations. The closing date is 31st May 2013.   Click here to access the ISTT Trenchless Technology Photo Competition application form. ISTT seeks contributions from ...
19. ISTT Membership Benefits
(Uncategorised Content)
... member to their Corporate membership. The second or Secondary member will be entitled to all benefits of ISTT membership including membership access to the ISTT website services including: • free downloads ...
20. Current year
(Uncategorised Content)
... had to be completed within 40 days, without unduly restricting access to residential property, and in temperatures that were routinely well below freezing. A semi-structural liner using Cured-in-Place ...

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