Mabey Hire provides ground support for Scottish Water project

Leading bridge and engineering services specialist Mabey Hire has provided groundworks support to help the installation of two new Pressure Reducing Valves (PRVs) and connecting pipework for Alnwickhill PRV site, constructed by George Leslie Ltd.

Contracted by Scottish Water, the project – taking place in Alnwickhill PRV site off Liberton Gardens, Edinburgh – was to replace problematic PRVs which had led to bursts in the local water network. These valves had been the cause of major flooding in the area.

The excavation measured 18.3m by 13.5m by 4.5m deep, with a clear opening needed for the new valve chamber and connecting pipework to be installed. George Leslie Ltd, in collaboration with Scottish Water, decided early during project development to install a large open excavation in a bid to reduce the construction programme due to the potential impact of further bursts.

To accommodate this and offer the maximum bending moment of 1950kNm, Mabey Hire implemented its Supershaft Plus solution, one of the industry's leading bracing systems. Mabey Hire also provided ladder access platforms to meet the specific client requirements, helping the project move along as quickly, safely and efficiently as possible.

Gordon MacDonald, Mabey Hire UK, comments: "The new valves are hugely important for Alnwickhill's residents who had suffered from the flooding. Located next to one of the main thoroughfares into Edinburgh, and close to a new housing estate, the site faced several constraints. We were pleased to work closely with Scottish Water and George Leslie Ltd. to carry out the work quickly, safely and efficiently."

The project will be completed during the latter part of 2017.

Ian Morton, Project Manager for Scottish Water comments: “The work will replace the existing PRVs at the site and provide an additional 2no. valves within a new partially buried chamber. The project is wholly contained within the existing Scottish Water site which benefits from existing access off Liberton Gardens.”

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