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Barton High Level Bridge (BHLB) is an eighteen-span steel-concrete composite
structure carrying the M60 over the Manchester Ship Canal. The original bridge,
constructed in 1960, comprised two independent deck halves formed from four
longitudinal composite girders each, separated by a central reserve joint and supported
by reinforced concrete bank seat abutments and hollow-column piers. The bridge was
later widened between 1986 and 1989 as part of the M63 improvement works, with new
edge girders and an extended deck slab added on both sides. Pre-widening
investigations identified slight alkali-aggregate reactivity (AAR) in the original concrete,
prompting a change in design approach. Instead of creating monolithic widened piers,
the new outer supports were redesigned as independent, free-standing hollow
reinforced-concrete columns founded on separate piles and connected to the original
piers via link-and-pin "Pin Bearings". This configuration allowed independent vertical
behaviour while constraining lateral and longitudinal movement, with the understanding
that long-term monitoring and periodic bearing adjustments would be required to
manage differential movements.
| Title | Supplier | Value | Awarded |
|---|---|---|---|
| Award ocds-b5fd17-991251a4-d597-4d92-b151-70771e9861fa-1 | AtkinsRéalis Jacobs Joint Venture | £272,959 | 1 Jul 2026 |