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

Johnston Pipes wins contract to supply glass reinforced plastic jacking pipes for renovation of the Dundee sewer system.


Johnston Pipes has won a £0. 5M contract to supply glass reinforced plastic jacking pipes for the North of Scotland Water Authority's renovation of the Dundee sewer system.

The Telford-based company is supplying 2100mm diameter 500T capacity pipes for a 938m long tunnel. The pipes will be installed through difficult geology, under buildings and the East Coast Main Line railway.

The main contractor for the work is Johnston Construction, which will fit the pipe with its Herrenkenecht AVN tunnelling machine, slightly modified to jack the 2100mm pipe.

'Because the outside diameter of the pipes is smaller, less excavation work is required so significant savings are to be made in time and disposal costs, ' said Ian Stanley of Johnston Construction's microtunnelling division.

'This is especially important here as there is some contamination from an old gasworks. '

Stanley said longer drives were possible because the pipe is supplied in longer lengths than standard concrete pipe, has better friction resistance and has a degree of flexibility.

A particularly challenging section of the work in Dundee is on a curve, below buildings and through a mixture of very difficult ground types.

'Using these pipes means it is much less of a headache, ' said Stanley.

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.

Related Jobs