K&B Crushers were instructed on site to crush site won arisings to 6F2 grade following the demolition works at Graven Hill Bicester. The site consisted of four large vacant warehouses and a sub-station, totaling approx. 41,831 sq.m.
With the site buildings classified as bat roosts, working with ecologists was critical to allow for the smooth completion of the works. H&SL worked efficiently in conjunction with a bat license and watching brief of the ecologists to complete the works with zero issues. A reservoir containing PFOS was also identified on site, with the team required to monitor and manage this throughout the works to ensure no wider exposure to the environment.
Throughout the duration of the works, service diversions were required to ensure the safety of the site team, as well as allowing the adjacent solar farm to remain operational. Our teams work with SSE stakeholders ensured there were zero incidents or triggers throughout the project. Completion of external audits and internal SHEQ reviews meant the team was always ahead of the required standards for safety on site
Crushing
Site-won hard inert arisings were crushed on site to produce aggregate for re-use.
Works commenced by loading the crusher using a 360° excavator. Concrete/hardcore was loaded into the hopper, which was hydraulically fed into the crusher. The crushed material fell onto the conveyor where any reinforcement bar or other ferrous metal was removed by a hydraulic belt magnet fitted above the main conveyor. The crusher then discharged crushed aggregate and metal into two separate stockpiles. Metal was periodically loaded away into metal bins, and aggregate was regularly cleared and stockpiled in the client’s desired location. Aggregate stockpiles were formed with a suitable angle of repose to ensure they remained stable and to mitigate any land-sliding of aggregate.
The crusher is fitted with a dust suppression system, whereby water is sprayed onto the discharge conveyor to minimise dust. All areas were left clean and tidy on completion.
