Full Civil Engineering Design Package
Civilistix Consulting Engineers were appointed to undertake detailed design (RIBA stages 4/5) for a residential development of 23 units and associated external hardstanding area at Hackney London.
Our drainage design utilised permeable paving to the central courtyard area which further to providing treatment to runoff, we designed to become fully surcharged during the 100 year plus 40% climate change event reducing overall the extent of underlying geo-cellular storage required to accommodate the full attenuation storage provision.
Due to the site being unsuitable for infiltration drainage and no watercourses nearby in which to make a connection, we agreed discharge consent with Thames Water via an S106 for a controlled connection at 2l/s to their combined sewer.
Made ground was ~2m thick and opposed to removing this to find a stable pavement formation level, we introduced a sub-base on top of capping layer design which overall, optimised the construction operation leading to cost and time savings