2005 – Eliminating Inherent Instability

Park Row, Clifton, Bristol


Two neighbouring redevelopment sites straddle a steep hillside slope, with documented historic instability.

The Panoramic reused the rectangular 1960’s ‘Barrette’ piled foundations, which take large axial loads and high moments. Intégrale’s stability assessment demanded additional, small diameter-high capacity drilled piles to increase the factor of safety, for 7 storey apartments.

The 5-storey Level Club next door, was extended out over the slope, being converted to student accommodation. This also required drilled piles to support the new vertical loads, plus rock anchors and upgraded retaining wall, to provide adequate horizontal restoring force.