CARDIFF PROPERTY developer JR Smart has begun phase four of a major development of industrial units at the 30ha Capital Business Park at Wentloog, 13km east of Cardiff.
The steel portal-framed buildings are supported on a concrete perimeter ring beam, which is tied into precast concrete piled foundations.
Similarly, the concrete oors are cast into and supported on smaller section precast concrete piles.
JR Smart sub-lets all the specialist contracts on negotiated fixed-priced terms to contractors that have, in many instances, been working with the company since it was founded about 30 years ago.
Aarsleff has so far installed about 4,000 pre-cast concrete piles for the development, including nearly 600 on the current phase, to layout and design by RVW Consulting. The subcontractor is installing 250mm and 200mm square section Centrum continuously reinforced piles, with a driven length of 8m to 14m. Rig crews are installing them through a mixture of sands, clay and peat to found in the underlying Marl.
The 250mm square section piles, with a working load of 550kN, are installed around the perimeter of the buildings to support the ring beam and take the stanchion loads. The smaller section piles, again driven singularly and on a fixed-grid pattern inside the perimeter piles, each accommodate a working load of 300kN to support the cast in situ steel mesh reinforced concrete oor slab.
On completion of the piling, Cardiff-based contractor Andrew Cunningham will follow on with the ground works, cutting the piles down to ground level and tying them into and casting the perimeter ring beam.
Westpile has won a £330,000 piling contract for a west London private development from developer Raven Cotswold. The scheme will see the building of two mansions with a combined value of more than £20M. Westpile is building secant retaining walls for the basements with 600mm diameter piles installed to an average depth of 10m, and 127 bearing piles. The project, near the New King's Road in Fulham, comprises two private residences. The two-storey properties will feature a swimming pool, basement ofce, four-car garaging with staff accommodation above, as well as ofce units fronting onto the Peterborough Road. The work is expected to take six weeks.