Abbey Pynford were approached by Mulaley on behalf of the London Borough of Hillingdon to develop an underpinning scheme for a rear section in 2 Y shaped blocks of flats where the section to be underpinned is supported on 6 reinforced concrete columns.
The difficulty in this project was to maintain the stability of the building while underpinning only 6 no 300mm square columns. Traditional methods of propping walls and removing the temporary supports after would not work on this project.
Abbey Pynford devised a method where by each column would need to have the load removed and be supported by a temporary mabey propping system. The column could then have the underpinning raft installed in a specific sequence, with only 2 columns being underpinned at any one time. This meant each block has a 3 phase underpinning sequence.
This complicated job involving piling, jacking and RC works to rear elevations of two 3 story block of flats was successfully completed on time, with very little or no disturbance to the residents who remained in the flats during the duration of the works.
Nick Tidman, Contracts Manager