“Victoria Bridge, Worcestershire”的意思、由来-开放百科全书

The Victoria Bridge crosses the River Severn between Arley and Bewdley in Worcestershire, England. At the time of its construction, the 200-foot railway bridge was the longest single span cast iron bridge in Britain.^[1]

The cast-iron arch bridge has four arch ribs each of nine parts bolted together. The arch elements were cast by the Coalbrookdale Company and the bridge was built by Thomas Brassey, Samuel Morton Peto and Edward Betts. Its design is almost identical to the Albert Edward Bridge which spans the Severn at Coalbrookdale in Shropshire, both designed by John Fowler.^[2]

Opened for traffic on 31 January 1861, the railway line was closed to traffic in 1963. The bridge survived the threat of demolition and was then used by the Severn Valley Railway. In May 1974, heritage passenger services were re-introduced between Alveley Colliery and Bewdley over the Victoria Bridge. It was restored in 2004. The bridge has appeared in several films, including the 1978 film The Thirty-Nine Steps.^[1]

Construction

The Victoria Bridge was constructed to carry the Severn Valley Railway over the River Severn just south of Upper Arley.^[4] The line was a 64 km long running from Hartlebury in Worcestershire to Shrewsbury in Shropshire, passing through several towns including Stourport-on-Severn, Bridgnorth, and Ironbridge. The line was built between 1858 and 1862 and it was opened on 31 January 1862 and regular services commenced the following day.^[3]

The bridge was designed by John Fowler, the chief engineer of the Severn Valley Railway.^[3] It is a single cast-iron segmental arch, considered to be quite large for the era, with a span of 61 meters and a 6.1-meter rise.^[3] The bridge arch has four ribs made up of nine H-section pieces bolted together; the ribs are cross-braced by tie bars with tensioning nuts and the spandrels are perforated by vertical slots.^[3] The weight of the ironwork has been estimated at about 500 tonnes. The ironwork was cast by the Coalbrookdale Company.^[3]

The bridge abutments are made of rusticated sandstone ashlar, topped by plain parapets.^[3] Each abutment has a single 12-ring blue brick arch to provide river-side access. Along the west bank, the towpath is carried around the abutment on a walkway plinth that juts out into the river.^[3] On the east side the abutment wall drops straight to the river. The single track is carried on a ballasted timber deck even though the bridge is wide enough to accommodate double tracks.^[3]

On 24 November 1859, the bridge's foundation stone was laid by Henry Orlando Bridgeman using a ceremonial silver trowel presented to him by the contractors.^[4] The contractors involved in the bridge's construction included Thomas Brassey, Samuel Morton Peto and Edward Betts. A time capsule was placed under the foundation stone. The glass jar contained silver and copper coins and a signed paper with details of the occasion. By early February 1861, the foundations were completed.^[3]

The four cast iron ribs were put in place and on 10 May 1861, bridge was completed.^[3] Commemorative inscriptions were cast into the midspan of the arch ring on each face of the bridge. They read, "Victoria Bridge, 1861. John Fowler, Engineer" (central position) "Messrs. Brassey & Co., Contractors" (left position) and "Cast and erected by the Coalbrookdale Company" (right position).^[3]

The Victoria Bridge was the longest single-span bridge made of cast iron in Britain when built. Its design was replicated by Fowler when he built the similar Albert Edward Bridge over the River Severn outside Coalbrookdale.^[3]

Operational use

In the early 1950s, the bridge deck was relaid.^[3] Rail traffic on the line diminished during this period and the line was a victim of the Beeching cuts. On 9 September 1963, the Severn Valley line was closed to regular passenger services and most freight traffic but the southern portion was used by coal trains up to 1969 and limited passenger services; all such use ended during 1970.^[3]

On 6 July 1965, the Severn Valley Railway Society was formed to preserve and restore as much as possible of the line.^[3] The new Severn Valley Railway Company was incorporated in May 1967 and set about acquiring as much of the line as its finances would allow. In May 1974, it succeeded in re-introducing passenger services between Alveley Colliery and Bewdley which involved crossing the Victoria Bridge.^[3]

Between November 1979 and April 1980, a refurbishment programme was undertaken to safeguard the bridge and its capacity to support 21-tonne axle loading for running train services.^[3] Refurbishment cost of £94,346 including the replacement of the transverse timber deck support beams with 54 steel beams. More than half of the iron platework was replaced with steel, 3,500 rivets were replaced with high tensile friction grip bolts and it was painted with 1,200 litres of paint.^[3]

Because of its age, the bridge has required considerable investment to allow for train operations.^[3] In early 1994, about £200,000 of repairs addressed cracks in the bridge's abutments and corrosion in the cast iron girders and cross bracing. To preserve the bridge a 15 mph speed limit is imposed upon all traffic and double-headed trains are no longer permitted.^[3]

In early 2004, the bridge was closed for six weeks to install steel mesh material to form a new deck and a repaint. In April 2004, at the reopening ceremony the ribbon was cut by a local woman named Victoria Bridge.^[5] Before restoration, the bridge deck made of secondhand timber sleepers was rotting away. Refurbishment cost £320,000, a large proportion of which paid for scaffolding.^[3] The project was commended at the 2005 Historic Bridge and Infrastructure Awards by the Institution of Civil Engineers.{{CN|date=June 2018}}

Construction

Operational use

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