Maintaining the UK's road network ...
Highway structures (bridges, culverts & tunnels) have been designed and built since people started moving goods around on some sort of mechanical device. Over the years, the shape, size and complexity of these structures have changed, and with these changes and the increased traffic flow over them, comes the increased need to maintain them. This is borne out by the recent bridge collapses, and the large repair and bridge strengthening schemes that are taking place around the world on our highway structures today.
All concrete highway structures suffer from deterioration to some degree primarily due to corrosion of the steel reinforcement and water ingress. This mechanism of deterioration is further compounded in Northern Europe where salt (sodium chloride) is used on road surfaces in winter to stop the ice forming. The problems found on these structures need to be identified early and dealt with to ensure that the structure is not only structurally sound, but will last at least for the intended design life.
CRL, with over 65 years’ experience and a long record of successful innovation in the repair and rehabilitation of highway structures, can provide a comprehensive service for the inspection, repair and strengthening of these assets using the latest materials and techniques. We ensure that we provide successful cost-effective engineering solutions to repair and enhance the durability of bridges, bridge bearings, culverts and tunnels by taking part in ‘Early Contractor Involvement’(ECI) and by ensuring that there is a collaborative approach to the works at all times.
For concrete structures the works are undertaken in accordance with the European Standard BS EN1504. Defective areas of concrete are repaired either hand applied mortars or for large volumes it may be sprayed gunite or flowable self-compacting concrete, the durability enhanced using corrosion control techniques such as cathodic protection and the structure strengthened where needed using carbon fibre reinforced polymer (CFRP) composites.
Masonry bridges and tunnels can be strengthened using embedded stainless steel anchors and waterproofed by resin grouting and the installation of liners.
As a testament to CRL’s experience and skill in bridge repair, bridge strengthening and the repair and rehabilitation of highway structures, we currently hold CWF frameworks in 5 of Highways England’s areas; Areas 1, 2, 10, 13 & 14 and have just been awarded a £5 million contract to carry out various works to the structures on the A19. We are one of the leading bridge repair & maintenance contractors in the UK with a 20% market share of the industry.