The Greenwich Peninsula defines one of the most recognisable aerial landmarks of the capital. Holding a history of nationally significant industry, the redevelopment of this area boasts a great success story for the regeneration of former brownfield land within London and serves as an archetypal example of the dynamic and changing nature of city use.
RPS was commissioned by Knight Dragon (the developer) to carry out geo-environmental investigation and assessment for the redevelopment of the Riverside and Central East areas of the Peninsula. These areas had a long and complex history of contaminative land use, with perhaps the most significant of these being the South Metropolitan Gas Works and the Blackwall Point Power Station. The Peninsula is also known for the complexity of its ground conditions, which host both known and likely unrecorded geotechnical hazards. Due consideration also had to be given to the presence of the Jubilee Underground Line running beneath the site and potential for the presence of unexploded ordnance from bombing during World War II.
The investigation was tailored to assess potential risks to future occupiers and the environment, including the Chalk aquifer at depth, from any existing soil and groundwater contamination beneath the site. RPS provided interpretative assessment of the soil and groundwater data obtained as part of the investigation with recommendations provided for remedial works, where necessary. Soil gas concentrations were also assessed to determine whether any protective measures would need to be engineered into the proposed development.
With structures up to 33 storeys in height proposed, RPS was also responsible for carrying out geotechnical assessment, with data obtained using both in situ testing (including pressuremeter testing) and ex situ laboratory methods. RPS provided detailed geotechnical evaluation of this data to inform the detailed design.
The majority of the development incorporated basement car parking and RPS provided detailed characterisation of material to be excavated as part of basement construction for potential re-use or, where necessary, disposal. The investigation also included facilitating the monitoring of vibrations from the underlying Jubilee Underground Line to determine potential influence on foundations at depth.
To date, RPS has designed and managed ground investigations across the Peninsula incorporating the drilling of over 70 boreholes to depths of up to 60m below ground level, the installation of over 60 monitoring wells and the excavation of more than 40 trial pits and trial trenches.