Contractors World

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Contractors World  - UK & Ireland
2012 Vol 2 No 7
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Massive support props for massive basement excavation - continued

The strut was first developed in 2008 for use on the Tyne Tunnel project for French contractor BouyguesThe strut was first developed in 2008 for use on the Tyne Tunnel project for French contractor Bouygues. Essentially a bespoke product designed for a specific purpose, it has now been updated, refined and launched as part of company’s major projects range.

“The MP500 is the flagship of our fleet,” says Mr Whitmore. “We are seeing a growing demand for these large struts as a cost-effective solution for all types of major excavation.”

The hydraulically extendible strut uses modular tube sections to obtain the required length and has a hydraulic adjustment of +/- 0.5m. The strut is assembled in-situ, fixed to the corbels and extended and pressurised between supports before being mechanically locked off with twin load-bearing screws.

Besides providing a clear working space within the excavation, the struts save time thanks to the speed with which they are installed. Even the massive struts took less than half a day to fix in place.

During the excavation phase, loads on the support structure will be constantly monitored in real time using Groundforce’s own remote load monitoring system. This uses load pins in the strut connectors to measure loads and send readings via secure SMS or wireless internet links to authorised recipients.

Each 47 m long prop was installed in less than half a day, which is far quicker than a traditional fabricated solution. The system does not require any mid-span support and has the added benefit of incorporating a load monitoring system.

Merchant Square, a development by European Land and Property, is due for completion in summer 2014.

Click here for more information >>> Groundforce

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Construction begins at Plymouth EfW plant

Main construction has begun at the energy from waste incinerator plant in Devonport Dockyard, Plymouth. GHA Livigunn were appointed by Kier Construction Ltd as Lead Construction Designers for the Plymouth EfW facility for client South West Devon Waste Partnership / MVV Environment Devonport Ltd.

The start up of construction follows the completion of pre-construction works for German energy specialist, MVV Umwelt, and the securing of planning permission and the Environment Permit for the plant.

The plant is designed to handle 250,000 tonnes of waste a year, and will divert 97% of the South West Devon Waste Partnerships residual waste from landfill, saving around 70,000 tonnes of CO₂annually.

The main building is approximately 187 m long with a height up to 45 m. The main building and plant foundations are piled through made ground of 25 m depth with pile loads to 4,000 kN.

The construction programme is expected to achieve a plant operational date of late 2014.



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