The 3-storey building at the intersection of Kyotts Lake Road and Stratford Road in Birmingham had become derelict and structurally unsafe over a number of years, and it was demolished in mid-2017; leaving the site vacant and open to new developments.
Even before demolition was complete however, planning permission was already being sought for a new 3-storey development containing a ground floor retail unit and 6 flats occupying the next 2. After a few revisions, the plans were approved in August 2017.
Per the structural engineer’s drawings, the project originally required x36 200mmø piles with a load capacity of 300kN, 127 linear metres of steel ring beam and 51 cubic metres of concrete.
However, during excavation it was discovered the neighbouring building’s existing foundation would prevent our new one going ahead as planned, and a cantilever beam solution had to be engineered.
The proximity of the outer footing to an adjacent road also presented an issue. The width of the footing itself couldn’t be made narrower due to the steel ring beam, so the overall perimeter had to be moved inward, with the piles moving to the outer edge.
Ultimately, we installed x49 273mmø piles with a 400kN load capacity, which required the use of our Premodrill 33 D1200 drop hammer rig (the red piece of machinery in the photos). Most of the piles drove to 8 metres, with some going to 6 or 10.
The 127 linear metres of ring beam increased to approximately 174 linear metres, and the amount of concrete increased from 51 cubic metres to approximately 100, which we pumped in using a 65m boom pump.
Do you value professionalism and require a guaranteed piling solution? If so, get in touch for a free site visit and estimate.
Tel: 0161 706 0365