A27 Chichester Drainage Scheme

Architecture 1837176 1920 | BRE Group

CEEQUAL Excellent (80.5%) – Whole Project Award
Version 4, Apr 2015 | Chichester, London UK

ClientHighways Agency
DesignerBalfour Beatty Mott MacDonald JV
ContractorBalfour Beatty Mott MacDonald JV
Assessor: Helen Denham

Project Summary

The works are located on the A27 Chichester Bypass between the A259 Fishbourne Road roundabout and the A285 Portisfield Way roundabout. The A27 in this location consists of a Dual All Purpose 2 lane Carriageway with roundabout junctions except for the B2144 Oving Road which is a signal junction.

The works involve the renewal of the existing drainage linear soakaways to relieve the re-occurant flooding along the bypass. The existing drainage is by drainage channels to short lengths of carrier drains to linear soakaways. Primarily the drainage renewal is of the soakaways to bring them back to full operation. The works will also include the construction of a pumping station and the repair of category 3-5 defects following surveys in 2010.

Waste was designed out of this scheme by incorporation of geocelluar units for soakaways reducing the need for trench excavation and therefore waste from cut and fill.

Trenchless technology also reduced the need for excavation and therefore waste during the installation of the link to the pumping station at Whyke Roundabout, successfully achieved in 2014 following a delay due to problems in the initial exercise.

It was assumed that 100% recycling rates could be achieved for all waste streams listed.

Achievements

Energy Assessment Results: LifeCYCLE assessment identified the following savings.

The majority of the additional carbon in the traditional soakaway is within the concrete drainage pipes that are required, which accounts for the large difference. Over 1,840m of concrete piping was needed, which accounted for 83% of its total capital carbon for the soakaway.

The difference between the Standard total carbon in 2012 to the Geocellular total carbon in 2013 and 2015 is the result of the change to the design and as it evolved the associated carbon was reduced still further.

When comparing the Geocellular total carbon at inception with the geocellular at construction we see that there was an overall percentage drop of 4%. This equates to 17.6 tonnes CO2e. This shows that efforts were made to reduce the total carbon by reducing the construction materials required.

The basic lifecycle analysis for the Geocellular block design indicated that 53% of the carbon emitted was during the initial works over a 50 year life span and it was found that 22% carbon saving could be achieved with the geocellular blocks design.

CEEQUAL insights and case studies

Browse the latest insights, thinking and case studies from CEEQUAL

 

light rail sustainable and safer city Bybanen Bergen | BRE Group

Bybanen D11 Sentrum

To achieve a more sustainable and safer city, Bybanen Bergen, are building a light rail. The first phase of the ...
Read More
Lillestrøm pumping station | BRE Group

Pumpestasjon PA240 – Lillestrøm Kommune

Construction of a new pumping station infrastructure in the municipality of Lillestrøm. The project has great social significance in terms ...
Read More
Westside Metro Extension Phase One | BRE Group

Birmingham Westside Metro – Centenary Square Extension

The Midland Metro Alliance (MMA) is working on behalf of Transport for West Midlands (TfWM), which is part of the ...
Read More
Musaimeer Pump Station and Outfall Qatar | BRE Group

Musaimeer Pumping Station and Outfall Tunnel

Musaimeer Pump Station and Outfall (MPSO) is one of the unique infrastructure projects of Ashghal which aims to provide a ...
Read More
Bybanen D12 Store Lungegårdsvann | BRE Group

Bybanen D12 Fløen – Kronstad

The Bybanen tram-project is part of the Miljøløftet, a common term for the urban growth agreement and the city infrastructure ...
Read More
DCIM100MEDIADJI 0115JPG | BRE Group

A6 Randalstown to Castledawson Dualling

Delivered by the Department for Infrastructure the A6 Dualling Scheme upgrades 14.7 kilometres of Transport Corridor between Randalstown and Castledawson, ...
Read More

Get in touch

Contact us now or call us on +443330147880 if you would like to talk to our team about how CEEQUAL can support you.

Tags