Pipe Jacking is an underground construction technique used for the excavation of small tunnels, generally with diameters less than 2 meters. This technique is used for the installation of pipes, cables and other underground services.

With this technique, a tunnel boring machine or shield is used to excavate the soil and simultaneously install a lining in the tunnel. The shield is designed to withstand the excavation forces and provide a safe working surface for personnel working inside the tunnel.

11 1


 3 Full HERRENKNECHT AVN 1200 T machines, plus 1400 y 1500 extension kits (covering a diameter range of 1200-1400-1500)

 1 HERRENKNECHT AVN 1800 T machine, plus a 2000 extension kit (covering a diameter range between 1800 and 2000)

 1 HERRENKNECHT AVN600 microtunneling machine (shares some resources with the AVN1200)

csm product avn 01 5a9b2c9d44 1


Construction of service infrastructure

Public service tunnels

Construction of roads and bridges

 Oil and gas industry

 Sustainable construction projects

 Submarine outfalls


The excavation process begins from a launch shaft, where the shield is placed and drilling is initiated. The shield advances through the soil, pushing excavated soil towards the back of the tunnel. The lining is installed behind the shield as excavation proceeds.

Once the shield reaches the reception shaft at the opposite end of the tunnel, excavation and lining installation are completed. Excavated material is removed from the reception shaft and taken to the surface.

The use of a closed-face microtunneling system allows for the construction of tunnels quickly and efficiently with minimal impact on the environment and nearby activities.