PipeJacking.org
Title
The Pipe Jacking Association
Description
Pipe jacking, generally referred to in the smaller diameters as microtunnelling, is a technique for installing underground pipelines, ducts and culverts. Powerful hydraulic jacks are used to push specially designed pipes through the ground behind a shield at the same time as excavation is taking place within the shield. The method provides a flexible, structural, watertight, finished pipeline as the tunnel is excavated.
There is no theoretical limit to the length of individual pipejacks although practical engineering considerations and economics may impose restrictions. Drives of several hundred metres either in a straight line or to a radius are routine. A number of excavation systems are available including manual, mechanical and remote control. Pipes in the range 150mm to 3000mm, can be installed by employing the appropriate system. Construction tolerances are compatible with other tunnelling methods, and the pipe jacking method generally requires less overbreak than segmental tunnels, providing better ground support.
Excavation methods are similar to those employed in other forms of tunnelling using either manual or machine excavation. Shields, excavation and face support can be provided for a wide variety of ground conditions.
Contact
- Pipe Jacking Association
-
- 1 Temple Avenue London
- GB EC4Y 0HA
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- +44.1582572148
