Articles & Case Studies

United Utilities Gets the Geobear Treatment on its Cofferdam in Blackpool

Posted: Tuesday 13th February 2018

Normal 0 false false false EN-GB X-NONE X-NONE Geobear, the world’s leading contractor in geopolymer technology for ground engineering, has successfully completed works to stabilise running sand in a cofferdam installation in Blackpool, North West England on a United Utilities / MMB project being undertaken by Ward and Burke Construction.

Ward & Burke had to construct a 9.5m deep cofferdam to receive a TBM (tunnel boring machine) with running sand and silt in the formation level. The cofferdam is within close proximity to private property / underground utilities and the running sand and silt caused major concerns to the contractor. Initially Ward & Burke mobilised a CFA auger rig to inject concrete below the formation but the conditions did not prove favorable for this technique “Geobear to the Rescue”

Geobear’s solution was to pump its specialist geopolymer solution into the running sand, which expands at such a rate it becomes an almost integral part of the running sand and when it solidifies, stabilises the sand to provide a solid footing on which Ward & Burke could continue to work and actually dig it out.

Speaking for Ward & Burke, Niall Flood - Site agent said: Geobear used their specialist injection technique to make a very difficult geotechnical task manageable. Their involvement was invaluable to us and was a perfect example of two specialist companies coming together, working in harmony to achieve a fantastic result. Ward & Burke will be working with Geobear again on deep excavations and we would recommend others to look at the Geobear solution.

Speaking about the project Richard Holmes, Managing Director, Geobear, said: “This is one of those projects where Geobear’s solution was really the only economic and time-available option available left to Ward & Burke on this United Utilities / MMB project, having exhausted the original option of CFA piling. Geobear’s geopolymer solution worked perfectly, stabilising the sand fast, efficiently and also economically. Geobear was able to demonstrate that for projects such as this, its solution should be the first option considered.”

Geobear’s work on the project commenced the 8th January 2018 – and took just over a week to complete.

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