Battersea Power Station (BPS) redevelopment involved construction of several blocks multi-storied buildings with basements (and temporary excavations) of various configurations over large areas, see enclosed plan. Basements are up to 13m deep and intended to be formed within piled wall enclosures.
A number of Thames Water Utilities Limited (TWUL)’s assets, including various tunnels with different types of lining/construction methods and associated shafts, exist in the vicinity of the redevelopment.
Transport for London (TfL) substructures comprising tunnels (6.5m diameter) and station boxes (up to 23m deep) part of the northern line extension (NLE) project also exist around the site.
GCG was commissioned to undertake an impact assessment of the combined effect of the BPS basements and NLE works on the TWUL assets. The purpose of the assessment was to inform the feasibility of the proposed BPS basements.
A combination of a few industry-standard analytical and empirical approaches were used for estimating the ground movements due to various construction activities. The cumulative impact of the ground movements on the TWUL assets was assessed, and verified against TWUL’s allowable criteria depending on the asset type and their condition.
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