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

Manxmen go for the burn

MAY GURNEY Technical Services last month finished piling for a new waste incinerator on the Isle of Man, south of the capital Douglas.

The facility, designed and built by Kværner Engineering for the Manx Government, will alleviate the island's waste disposal problems. It is positioned in a hillside trough to reduce its impact on the surrounding countryside.

The £750,000 piling contract was to install 488, 400mm diameter and 28, 450mm diameter bearing piles to support the structure and a further 143, 750mm diameter contiguous bored piles to form a perimeter wall for a waste pit and ash bunker.

Site geology comprises a stiff boulder clay overlying Manx Slate. While the slate is an ideal material for the load bearing piles, it can be very hard, making it difficult to penetrate and build the bored pile wall.

The waste bunker excavation was 9m deep, so the contiguous bored pile wall had to be propped or anchored. May Gurney worked closely with Kværner to develop a solution using the waste bunker walls to provide a top prop to the piles, removing the need for any intermediate support.

The original plan was to have a 2m thick floor slab for the waste bunker to resist hydrostatic upthrust, as it is several metres below the water table. Instead, May Gurney proposed using permanent tension anchors to hold the base slab down, which meant the thickness of the slab could be reduced to 1m.

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.