Project Brief

Marshalls Civils and Drainage supplied the UK’s largest circular precast weir wall chamber to the prestigious Erith Park development as part of the £60m phase 2 programme of drainage and enabling works.

Solution

Groundworker and civil contractor, O’Keefe Construction, took delivery of the precast Weir Wall chamber after the off-site solution was made at Marshalls Civils and Drainage Pollington works in Yorkshire.

The precast concrete weir wall chamber was delivered with a hydro-brake® fitted, complete with a preformed base and inlet holes formed prior to delivery to suit the site’s exact requirements. Once the weir wall was lifted into place, the connecting pipework was installed, saving Keefe installation time and allowing the open excavation to be closed quicker.

The weir wall was needed in such a large chamber (3660mm) due to the head and flow rate requirements, which were 4.81m head and a flow rate of 174 litres per second. A precast option was necessary due to the pressure on the stainless steel hydro-brake® inside the chamber.

Client Comments

Ross Halliday, Project Manager for O’Keefe Construction, said: “The build of the chamber was complex for all to carry out. Not only was the chamber the largest of its size in the UK, but there were also added elements of delivery access and depth of excavation in close proximity to public interface."

"Marshalls Civils and Drainage were on board with all the design elements from the start, taking into account all the relative requirements that made this build such a unique item. Special thanks to Steve Callow, Marshalls Civils and Drainage's Proposal Manager, who was on hand to deal with all the design changes and queries raised through the design, manufacture, and install process."

"The install process was as smooth as could be from a project manager’s point of view. The delivery arrived on time and as planned. Myself and the team programmed day one to consist of the installation of the base unit, secondary ring, and weir wall containing the hydro-brake unit."

"Steve was on site to assist with the first and most technical element of the build, along with Adrian Steele from Marshalls Civils and Drainage, to monitor and give guidance on quality with regard to sealants and site specifics."

"Together, the O’Keefe Site team, along with guidance from Marshalls Civils and Drainage, achieved the programmed works for day one, setting up the completion of the build to continue in a safe and productive manner."

"Big thanks to the guys at Marshalls Civils and Drainage for assisting us in carrying out this challenging operation with such precision and efficiency.”