Slipform Paver Masters A Very Special Job
A challenging job for the contract consortium lead by Carillion on the M6 motorway was paving a concrete slab under very difficult conditions.
With an overall length of 373 km, the M6 is the longest and one of the most busiest motorways in the United Kingdom. The M6 connects the M1 motorway near Rugby with Carlisle near the Scottish border.
Due to the steadily growing volume of traffic, the Highways Agency decided that the emergency service lane was to be upgraded for use as an additional traffic lane between junctions 10a and 13 near Cannock, 25 km north of Birmingham.
The primary task of the consortium comprising, Carillion, as contractor and the construction company, Extrudakerb Ltd ,was to completely replace the existing reinforced concrete slab with asphalt surfacing on the service lane.
This had to bring the new traffic lane onto a level with the adjacent pavement and create a homogeneous concrete pavement.
Special Conditions Call For Special Machines
As it was impossible to close the motorway and to minimise inconvenience, the work had to accomplished at night. This meant an exceedingly short time frame during which the concrete slab could be paved. At maximum it was 6 hours.
This was the first project of its kind in the United Kingdom. Work can only be carried out on this highly sensitive traffic artery during selected time frames and in exceedingly confined conditions.
Following an intensive planning phase, project manager, Mark Gladwell, decided on a sophisticated timetable and logistics schedule covering every last detail.
During the day, temporary steel barriers separate the service lane to be converted from the main traffic stream on the adjacent traffic lane.
At night, when traffic is lighter, lane 1 and part of lane 2 are closed to traffic to provide an access route for the construction vehicles.