SIMPLEX FOUNDATIONS is installing 550 CFA piles on a sixweek contract for a new business park in Leeds, West Yorkshire.
Leeds Valley Park, on the outskirts of the city, is close to the M1, M62 and M62 motorways.
The developer is Akeler Leeds Valley Park and the main contractor Bowmer & Kirkland.
Simplex's contract is for the second phase which involves two office complexes, Ellington and Darwin, on the hilltop site. Both have large car parks.
Foundations are being installed on two levels - for concrete retaining walls on the lower level and for the buildings on the upper.
Ground conditions are fill over stiff boulder clay, weak mudstone and sandstone which becomes stronger with depth.
Simplex is using a Casagrande B150 and a Soilmec R312 to install the CFA piles, which found in the sandstone at an average of 12m deep for the Ellington building and 16.5m deep for Darwin.
The Ellington building will sit on 156, 400mm diameter piles, with its retaining wall founded on a combination of 75, 500mm diameter and 63, 400mm diameter piles.
Darwin is founded on 136, 400mm diameter piles and its retaining wall sits on 67, 500mm diameter and 52, 400mm diameter piles.
Both buildings are due for completion early next summer.