16 Dec 05
Bridge lift saves US$3.5 million on motorway widening
Engineers have saved three motorway bridges from demolition by using computer-controlled jacking to raise them, providing increased clearance for traffic below. The three bridges carry the M60 motorway over other roads, one of which is to be designated as a 'high load' route. The bridges therefore have to provide 1.2m greater clearance than the norm and one had to be raised 1.62m. Traffic was diverted to alternative, newly-built bridges allowing the three existing bridges to be raised, rotated and stitched together with reinforced concrete. Realigning the bridges saved US$3.5 million and reduced congestion during the US$180 million project to widen the M60 motorway around Manchester.