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Huge basement wall completed

Simplex Foundations completed piling on the £210M Trinity Walk shopping centre in Wakefield for main contractor Shepherd Construction before Christmas.

It was working on a three month, £1.5M contract, which involved installing approximately 300 linear metres of rotary bored contiguous piles for a retaining wall, and 500 tubular steel driven foundation piles.

The presence of an ancient quarry, a buried gas storage holder and severe drops in rock profile meant continuous design changes had to be made to the contiguous wall.

The wall comprises about 700, 600mm diameter bored piles to depths of between 6m and 9m, reinforced with 450mm diameter steel cages.

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