GREEN & BLUE INFRASTRUCTURE
SUDSGRID 40 POROUS PAVING AT ASCOT HEATHERWOOD HOSPITAL CAR PARK
Due to open to patients in Spring 2022 and replacing the current building which has stood in Ascot for over a century , the redeveloped Heatherwood Hospital is designed to treat 168,000 patients a year , double the number of the old facility . Once open the new four storey building offers 48 inpatient beds ( half of which are ensuite ), six operating theatres and an imaging and endoscopy unit ; all centred around a double height space and a courtyard .
In order to meet SuDS planning conditions , consultants BDP specified permeable paving throughout the associated new parking areas in order to limit surface water run-off and minimise the risk of localised flooding . In total 4,200m2 of Sudsgrid 40 cellular pavers were supplied to Toureen Contractors and installed and filled with freedraining angular aggregate to provide 450 new parking spaces for the hospital . Yellow markers were also supplied to delineate the car parking bays .
ABG ’ s in-house Design Team proposed a sub-base design which utilises their unique Abgrid geogrid to reduce the thickness of DoT Type 3 stone required to achieve structural stability . An ABG Terrex NW nonwoven geotextile layer was also proposed to provide an additional stage of treatment for the infiltrating water . Overall , the incorporation of ABG ’ s design and products provided a shallower construction profile which also resulted in reductions in site excavation , off-site tipping , DoT 3 stone deliveries and associated costs .
The car park construction required extensive cut and fill to level the steep site in the protected Berkshire woodland location , and the car park surface water flow is controlled via hydrobrakes to stop downstream flooding as it drains off site through the woodland via a large detention pond , before entering local drainage systems and water courses .
Sustainable Drainage Systems
ABG specialises in the design & manufacture of innovative geosynthetic solutions that help to manage rainwater at source , improve water quality & enhance biodiversity .
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