project rochdale
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mejora de suelosTRANSCRIPT
www.pennine.co.uk
Rochdale, Lancashire Rochdale, Lancashire Rochdale, Lancashire Rochdale, Lancashire –––– Vibro Stone Columns Vibro Stone Columns Vibro Stone Columns Vibro Stone Columns
Vibro Stone Columns being installed at Sun Chemicals Plant, Rochdale, Lancashire
Project DescriptionProject DescriptionProject DescriptionProject Description
Lemmeleg commenced building a new ink manufacturing plant for owner Sun Chemicals Ltd. in February 2005 and Pennine was chosen to install vibro stone columns using the top feed method to support the floor slab and stanchion bases. This phase of new build went very well and by March 2005 Lemmeleg had substantially completed the construction of the steel frame and cladding structure. At this time Sun Chemicals secured an important order that required the provision of additional holding tanks within the new building. This effectively increased the floor loadings to 75kN/m2. The options available seemed to be to remove the cladding and part of the structural frame to accommodate a full size vibro rig or to excavate up to 3.5m of made ground and replace it with hundreds of tonnes of compacted granular material. Although the latter option could be
carried out from within the building there was a risk of undermining the existing foundations. Design SolutionDesign SolutionDesign SolutionDesign Solution
Pennine’s advice was sought and within 10 days a Tardis rig was on site installing vibro stone columns to the new tank bases. The Tardis – the UK’s smallest vibro rig – has a telescopic mast that provides a maximum working height of 7m, it can install vibro stone columns up to 5m depth. Once lighting and ventilation had been provided Tardis installed an additional 146 columns to depths between 3.0 and 3.5m thereby providing ground improvement to ensure that the new foundations will have comparable characteristics to those supported on the initial 264 vibro stone columns. Lemmeleg estimate that using Pennine’s innovative low headroom Tardis rig has saved up to 20 weeks delay and over £150,000 additional cost to their client.