Tunneling With Segments

Published: June 10, 2017 | Last updated: July 5, 2023

What Does Tunneling With Segments Mean?

Tunneling with segments refers to trenchless techniques by where pipes or casings are installed in the bore one segment at a time. In pipe jacking operations, after each jacking cycle, the jacks are retracted and a new pipe segment is inserted. The size of the entry pit is determined by the length of pipe segments to be installed and the size of the associated jacking equipment.


Trenchlesspedia Explains Tunneling With Segments

Trenchless construction using pipe or casing segments enable contractors to work with manageable lengths of pipe that can be easily transported and placed into position. Jacking rigs are designed such that when the jack is retracted, there is sufficient space to lower the next segment into position before re-engaging the jack and resuming the cycle. After the installation of each segment, checks on the direction of the bore can be carried out and adjustments made as necessary.


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