A11 Spooner Row to Tuttles Interchange Reconstruction Scheme

Large-scale sustainable delivery with excellent production rates, collaboration, customer satisfaction and exemplary stakeholder engagement and comprehensive social impact. 

Project overview

The project involved breaking out a 16km stretch of concrete dual carriageway (a key strategic route, forming the main link road from London to Norwich and parts of Suffolk and Cambridgeshire) and replacing sublayers and surfacing with more durable materials.

The original concrete road was laid in the 1990s and had a design life of 50 years. However, the carriageway had been suffering significant warping and cracking for a number of years, due to the lack of lateral reinforcement within the slab. The carriageway was covered in repair patches and new cracks were still appearing. The repair patches were ultimately ineffective, as the embedded steel rebar within the concrete was way below the surface (where the patches were applied).

Any movement within the concrete, and associated twisting or bending of the buried rebar, was therefore not addressed with the surface patches, resulting in permanent misshaping and cracking of the entire section of the A11. 

As well as reconstructing the carriageway, the work included refurbishing the drainage system, replacing safety barriers, repainting road markings, and inserting new reflective road studs (cat’s eyes). 

We processed and reused all excavated material and undertook comprehensive social value initiatives, achieving Perfect Delivery and excellent feedback.