Jones Bros Utilise Trimble GCS900 for Challenging Highway Project
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In North Wales a 1km long by-pass around part of the historic town of Ruthin is a perfect example of the challenging conditions that the terrain can throw up. The road, 15km outside of Denbigh, links up with the important A55 trunk road connecting Denbigh and Rhyl. Here the earthworks contractor, Jones Bros, of Ruthin, has been faced with a demanding mix of soil conditions with the soft clay and peat and sand and gravel beneath requiring extensive excavation. The site, although generally flat, sits on a river flood plain with a 2m high embankment made up of granular fill. The road, which includes a new bridge over the River Clywd, is of flexible construction with 150mm of sub-base, a 300mm top surfacing and an SMA (stone mastic asphalt) wearing course.
Work started in October 2005 with the first phase needing completion by the end of March 2006 to release some land for housing and all work having to be finished by July 2006. Time was therefore at a premium and Jones Bros, keen to investigate ways to increase their productivity whilst delivering a high standard of work, looked into the possibility of adopting machine control technology. The company was already familiar with Trimble's systems over a number of years and following a trial on a nearby landfill site opted for a GPS-based Trimble GCS900 Machine Control system for use on its Komatsu D61 dozer.
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