Pipe Jacking & Utility Tunneling
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. Differing from the microtunneling method, pipe jacking requires personnel entry in the tunnel to operate equipment which limits typical installation diameters to 48-inch and above.
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. Excavation is controlled at the face by the operator as the forward shield or TBM is advanced via thrust forces transmitted by the jacking frame through the product pipe. Excavated material is transferred into specially designed haul units that carry the soil back to the launch shaft for removal at the surface. At the end of each prefabricated pipe segment, a new section of pipe is lowered into the launch containing necessary tunnel connections and connected for continued advancement.
- Guidance: A pipe laser set to the desire line and grade is used from the launch shaft to a target inside the TBM or shield. Steering corrections are made by the TBM operator inside the TBM.
- Ground Conditions: Pipe jacking is most suited for non-pressurized ground to weathered rock. Various cutterhead designs are available such as closed-face attachments.
- Drive Length: Drive lengths are dependent on product pipe and ground conditions. Contact representative for typical installation lengths.
- Shaft Size: Shaft size is dependent on product pipe length. Typical installations require a 40ft long pits.
Akkerman has produced industry-leading pipe jacking equipment since 1973. We offer customized excavation modes, cutter head types, and diameters to meet project demands. Contact us today.