THE CHALLENGE
A fast-track site preparation, remediation & enabling works solution was required to enable timely commencement of piling and subsequent construction of 441 high-rise apartments— Hill Partnerships first Joint-venture with London & Quadrant (L&Q). The site contained significant reinforced concrete slabs and deep foundation pads impeding construction, variable Made Ground as well as localised hotspots of Asbestos Containing Materials (ACMs) and Petroleum Hydrocarbons.
OUR SOLUTION
Soilfix implemented an accelerated works programme in order to prepare the site, fully in accordance with a Materials Management Plan developed under CL:AIRE Code of Practice (DoWCoP). This included the following work elements:
- Site clearance, including vegetation removal and limited demolition works;
- Controlled breakout of building slabs and uplift of surface paving under watching brief;
- Probing and removal of obstructions to 2mbegl including historical, large padstones;
- Crushing of site-won aggregates to a 6F2 grading for on-site re-use within piling platforms and ongoing construction works;
- Targeted excavation and handpicking of ACM / Hydrocarbon hotspots with resultant soils stabilised and re-used in accordance with the site Materials Management Plan (MMP);
- Stabilisation of soft spots at the excavation formation;
- Construction of a sustainable ‘hybrid’ piling platform incorporating stabilised site-won soils capped with a running layer of site-won 6F2 crushed concrete;
- Attendance of piling works using 2nr rigs, including fast turnaround waste classification testing and management to provide more cost-effective off-site disposal of arisings;
- Re-establishment / re-instatement of perimeter site hoarding; and,
- Comprehensive environmental monitoring and controls.
Soilfix successfully completed all works on programme with zero lost time accidents, enabling timely commencement of piling and subsequent civil engineering works. Using DoWCoP, the remediation & enabling stage of the project achieved >99% re-use of materials.
