SCOPE OF WORKS
Works included the design of underbore after extensive service location, the installation of 312 metres of 125mm PN16 SDR 11 HDPE in rock ground conditions, the supply and weld carrier pipe, and pressure testing of installed mains.
CHALLENGES
UEA mobilised a Vermeer D100 HDD rig to deliver the works. With depths ranging up to twelve metres in rock ground conditions and beneath reinforced concrete slabs, UEA successfully utilised a Digitrack tracking system with varying high signal strength to track the underbore by walkover techniques. In order to undertake the works while maintaining the copper facilities operations, UEA constructed the underbore whilst set up on the concrete ramp therefore minimising the construction footprint.
COMPLETION
Once HDD works finished, UEA continued to work with the client to ensure that the connection of the new gas main was successfully completed. UEA also undertook pressure testing on the installed gas main and completed the works as executed drawings and Inspection Test Plans (ITPs) as part of UEA’s Quality Assurance Accreditation ISO 9001.
