Calamvale is a relatively new growth area that has doubled in size over the last 10 years, therefore requiring the pump station and pipeline to be up sized.
The location of the bore was in the middle lane of Gowan Road, with residential housing on both sides. The high density of existing services, major traffic management requirements and the close proximity to local schools and shops meant thatHorizontal Directional Drilling (HDD) was the obvious option. The required depth and alignment of this pipeline reinforced the requirement for HDD to be the chosen method during the design stage and as the preferred method for construction.
UEA mobilised its D100 x 120 (45 tonne) HDD drill rig and DFE 300gal/min cleaning system to undertake the pilot bore. Completion of the pilot bore confirmed that ground conditions were different to that stated in the geotechnical report which required all of the down hole equipment to be changed to suit rock conditions. Scheduling of the reaming works was extended due to the difficult ground conditions encountered, the final hole size was 600mm and the pipe was successfully installed.
For more information about this project or UEA Trenchless, please send enquiries to Steven Hopkins.