Putney Bridge, London, UK
Stirling Lloyd solutions used on £1.5m Putney Bridge repair & refurbishment Project.
A £1.5m project to refurbish and repair Putney Bridge in south west London, commenced in July 2014 and was originally scheduled for completion during October of the same year, included our unique waterproofing solution Eliminator® and our concrete repair material.
The Grade II listed arch bridge which crosses the Thames had a Ground Penetrating Radar (GPR) report undertaken in 2010 which identified areas of the deck as having areas with significant moisture and even saturation within its roadway and supporting structure. The bridge was in need of protection from water penetration to prevent structural damage and the poor surface it causes.
Wandsworth Borough Council
Metrail Construction Ltd
- Putney Bridge
Until the excavation and removal works had taken place, there was no way to ascertain the full extent of the repair works required and the additional time and cost implications these would have on the project.
With Putney Bridge being a major route across the Thames, minimising inconvenience and disruption to commuters and tourists was imperative and, as a consequence, the repair and waterproofing systems needed to match this requirement.
Stirling Lloyd offered an immediate, cost-effective solution for the waterproofing, surface and kerb areas. Metaset Resifilla was proposed for the deck repair as it is a multi purpose repair material, which achieves very high early compressive strengths, excellent thermal and mechanical shock resistance and also cures rapidly, within two hours across a wide range of temperatures, including sub zero.
Our Eliminator system was recommended as it would provide an effective bridge deck waterproofing solution with a fast cure, reducing any bridge closure times. It is an advanced bridge deck waterproofing system, which incorporate cold liquid spray-applied membrane that provides durable and long lasting waterproofing protection. These products were subsequently specified by Wandsworth Council.
On site, the existing surfacing and waterproofing, along with the kerb detail, were removed by main contractor, FM Conway.
Once all the original asphalt surfacing had been removed, assessment of the bridge structure was made by Wandsworth Council’s in-house Engineering Consultancy, revealed the existing polyurethane waterproofing system had completely de-bonded and delaminated from the concrete substrate. In addition, after the in-situ granite kerbs were removed, areas with loose, friable material were exposed that needed to be replaced with a robust, concrete detail.
The extensive bridge repair work and spraying of the waterproofing required was carried out by Metrail Construction Ltd, one of Stirling Lloyd’s Eliminator Authorised Contractors. A total of 4,000m2 of Eliminator was spray applied to the deck and Metaset Resifilla covered around 1,000m2.
As well as new waterproofing and a brand new road surface, new paving stones have been laid on the footpaths and the drainage system has been upgraded. Vegetation growing on the sides and underneath the bridge structure was also removed and the Victorian lamp columns refurbished, with LED lights installed to increase brightness.
Maryrose Page the project manager for the works at Wandsworth Council said:
“The service and range of products provided by Stirling Lloyd has enabled us to specify solutions to protect the concrete deck structure and complete the refurbishment of Putney Bridge in a fast-tracked programme.“
In the end, effective planning and management at Wandsworth Council, together with the exceptional turnaround of its contractors and the Stirling Lloyd systems, enabled the overall project to be completed in September 2014 and the bridge was able to reopen to traffic two weeks ahead of schedule and within budget.