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News

Geotechnical Survey Precedes Canary Wharf Development

01 Jul 2003

A detailed marine site investigation has been completed in London which will be used in the design and construction of the proposed BP4 tower development at the Canary Wharf complex on the Isle of Dogs. The major geotechnical survey was conducted by Cornwall UK based Seacore for client Canary Wharf Contractors Ltd .

Seacore deployed its own jack-ups for major marine geotechnical investigations in Londons Docklands.

Working from their own Skate 1 and Skate 2c jack-ups, Seacore used cable tool percussive boring to sink nine marine boreholes of 150mm and 200mm diameter through the superficial soils and into underlying chalk to depths of between 32m and 40m below dock bed level. In addition, Seacore used its own Italian Comacchio MC1000 rotary coring drilling rig working on the quay wall to sink two further boreholes up to a maximum depth of 48m below ground level.

The ground conditions were assessed using a combination of boreholes, cone penetration tests, pressure meter tests and down hole geophysical logging.

Magnetometer tests were conducted parallel to the Jubilee Line exclusion zone to check for the presence of unexploded ordinance. On completion of the fieldwork, a detailed report was presented to the client's supervising engineer, Arup Geotechnics.

MJ Information No: 18411

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