UEA Trenchless used a Guided Boring Machine (GBM) to accurately place pilot tubes along the centre of the alignment. The pilot tubes were followed by a traditional 450mm diameter auger bore which placed a steel case ready to envelop the DN350 polycrete product pipe. The accuracy of the pilot bore allowed the insertion of a comparatively small diameter enveloper which allowed a 30mm annulus to the product pipe. A traditional steering method would have required a 600mm diameter enveloper at minimum to allow for vertical inaccuracies.
The product pipe was inserted and grouted into position marking the completion of a highly cost effective, low risk carrier pipe installation.
For more information about pilot tube microtunneling please email firstname.lastname@example.org.
Image Caption: UEA microtunneling crew set up a guided boring machine (GBM) to install a 450mm steel case enveloper under the Bruce Highway at Dakabin, QLD.