Pipework at Liverpool WwTW
Project Overview
WATER
Client
United Utilities
Contractor
Galliford-Costain-Atkins Joint Venture
Start Date
01/11/2013
Project Value
£1.5M
Description
An 18 month contract to install a variety of pipelines at Liverpool wastewater treatment plant (Sandon and Wellington Dock) as part of a programme to increase capacity at the docks, removing more sewerage and treating it to the highest standards before returning to the River Mersey.
SGC Civil Engineering were brought in early on the project to work with the client in developing outline planning and methodology studies for the installation of some large diameter pipework.
This was part of the extensive £200m United Utilities project to provide a cleaner River Mersey (‘The Liverpool Programme’).
The 18 month contract included the installation of 2200mm, 2000mm, 1600mm diameter ductile iron and steel pipelines within the new and existing facilities; laid at depths of up to 6m.
SGC also completed a series of reinforced concrete structures and segmental shafts to connect the newly installed pipework across the plant.
The challenging nature of installing 10m long (2200mm diameter steel pipes) at these depths dictated a carefully sequenced temporary works installation utilising both traditional sheet piles and frames, and also high clearance trench boxes. Equally challenging was the testing and commissioning phase of the project which involved the installation of bespoke testing requirements to achieve the required thresholds and client compliance.
