London Gateway - Cooling Marshes
This 55Ha intertidal mudflat is located on the south bank of the Thames Estuary in an area close to Cooling Marshes. This project comprised the design and construction of a new 2.4km tidal flood defence embankment. The embankment, which is 6m in height and tied into the existing Thames Estuary flood defences, is located on very challenging ground with very soft silts and clays extending to 22m depth. The embankment was constructed from site-won material excavated from within the existing mudflats.
ByrneLooby prepared the design for this project including earthworks, soft ground engineering, slope stability and the erosion protection measures to ensure the long-term durability and longevity of the asset. Cognisant of the challenging ground conditions but also the program constraints, the embankment was constructed in a single stage, necessitating real time monitoring of settlement, pore pressures and deformation of the new structure.