When approached by a Canadian contractor in late 2014, Tunnel Service Group GmbH developed and designed a hydraulic power pack for a Herrenknecht AVN800B microtunneling machine. Development and design, part order and building was completed by the beginning of February 2015 so that the machine was on site in Canada and set up for drilling by Mid-March 2015.
Main specifications:
The performance of the hydraulic unit built by Tunnel Service Group GmbH exceeded all expectations in combination with a Herrenknecht AVN800A slurry machine (fully rebuilt by Tunnel Service Group GmbH) and a Herreknecht pipe thruster PT750. The crew of IPC, supported by Tunnel Service Group GmbH jobsite expertise, successfully completed a 429 mtrs drive; outreaching the former length record for DN800 direct pipe drives in Canada. Maximum hydraulic oil temperature stayed below 48°C with push speeds of up to 100 mm/min.