enveloper pipe / jacked pipe Installed using trenchless methods to provide initial support to the excavated bore, prior to installation of the carrier pipe, or in some situations to provide the permanent ground support and be the permanent carrier pipe.

What is the difference between microtunneling and pipe jacking?

Microtunnelling is well-suited to situations where a pipeline has to conform to rigid line and level criteria. A pipe jack is defined as a system of directly installing pipe behind an open-face tunnel boring machine (TBM).

What is pipe jacking in construction?

Pipe jacking is a trenchless construction method to install product pipe through the ground on line and grade for new service lines, sewer tunnels and utilities. ... Pipe jacking is done from a launch shaft to a reception shaft with advancement provided by a hydraulic jacking frame located in the launch shaft.