Your browser is no longer supported

For the best possible experience using our website we recommend you upgrade to a newer version or another browser.

Your browser appears to have cookies disabled. For the best experience of this website, please enable cookies in your browser

We'll assume we have your consent to use cookies, for example so you won't need to log in each time you visit our site.
Learn more

The works

Far from simply attacking the old Perry Oaks sludge works with a team of diggers, the E&E team is responsible for providing the rest of the site a platform from which to launch.

'Setting up the site may sound straightforward but we have effectively had to build a small town before we could even think about constructing the new terminal, ' says Burford.

Over 3.5km of roads, with four temporary Jansen bridges have been laid. There are 14 canteens and eight main office buildings to supply the army of workers that will pass through the site.

The site welfare and canteens are supplied with water from local boreholes capable of meeting an estimated peak demand of 250,000 litres per day.

To cope with the now mountainous topography of the site, a string of seven major sheet piled retaining walls have been constructed. Supporting site works next to an access road that delves down into the main terminal's basement is what is thought to be the highest reinforced earth structure in the country, standing at 18m.

First job on site was the establishment of a 3km long slurry cut off wall round the perimeter of the entire site, by second tier contractor Bachy Soletanche. This meant all contamination could be removed where necessary and dewatering for the bulk of works was possible without impacting the surrounding water table. Any works outside of the main site footprint must use local cofferdams to achieve dry conditions.

In preparation for the M25 spur road, which must be ready to roll by the end of 2005, a 1.2Mm 3clay embankment has been formed.

This had to be built ready for Balfour Beatty to come and construct the Highways Agency section of the spur.

Balfour Beatty's contract must be built in time to allow access to the site for fit-out contractors.

Have your say

You must sign in to make a comment

Please remember that the submission of any material is governed by our Terms and Conditions and by submitting material you confirm your agreement to these Terms and Conditions. Please note comments made online may also be published in the print edition of New Civil Engineer. Links may be included in your comments but HTML is not permitted.