The International Society for Trenchless Technology

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1. Conductor Casing
Steel casing hammered or pushed into place where soil strata are high in gravel and cobble content or where formation strength is low and the bore would be unstable. ...
Method of lining with a flexible tube impregnated with a thermosetting resin which produces a pipe after resin cure.
3. Eye (Pipe Jack Eye)
A sealing device placed in the shaft walls of the thrust and reception pits to allow the shield and pipes to enter and exit without soil, water and slurry flowing into the shaft. ...
4. Ferro-Cement
Material comprising cementitious and steel elements to form a structural lining, which is either placed in situ in a man-entry size pipeline or tunnel, or is preformed into segments for later installa ...
5. Impact Moling
... resistance of the ground for forward movement. During the operation the soil is displaced, not removed. An unsupported bore may be formed in suitable ground, or a pipe drawn in or pushed in behind the ...
6. New Installation
Construction of a new pipe or underground utility to replace or upgrade an existing system or to provide new service. ...
7. Packing
Material placed between pipe joints to distribute the jacking loads. ...
8. Pipe Bursting
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 ...
9. Pipe Eating
Replacement method, usually based on microtunnelling, in which a defective pipe is excavated together with the surrounding ground and a new pipe installed. The microtunnelling shield machine will usually ...
10. Pipe Splitting
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. ...
11. Rehabilitation
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. ...
12. Replacement
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.
13. Soft Lining
See Cured-In-Place Pipe (CIPP) ...
14. Swivels
Devices placed between the reamer and the duct puller or pulling head to eliminate rotation of the product during pullback. ...
15. Thrust Ring
A steel ring that is placed against the cross sectional area of the pipe to ensure that the jacking forces are spread around the circumference of the pipe. ...
16. Cured in Place Pipe
(Attached to Article: CIPP Lining)
Cured in Place Pipe (Filename: cured-in-place-pipe.pdf) | Description:Cured in Place Pipe ...
17. CIPP Lining
Cured in Place pipe (CIPP) can be used to rehabilitate sanitary sewers, storm drains and pressure pipelines for water, gas and process effluents. Circular pipe from 100-2,700mm and a variety of noncircular ...
18. Slip Lining
... size of the host pipe can range from small non-man entry to larger man entry pipes. Segmental liners may be pushed into the host pipe by hydraulic power or winched in place. Concrete and steel pipe with ...
19. Pipe Reaming
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 ...
20. Pipe Bursting
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 ...
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