Balsall Common Viaduct

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Balsall Common Viaduct
Coordinates 52°23′49″N1°38′28″W / 52.3970°N 1.6412°W / 52.3970; -1.6412
Carries High Speed 2
Crosses Heart of England Way
Locale Balsall Common
Characteristics
Total length425 metres (1,394 ft)
No. of spans17
Rail characteristics
No. of tracks 2
Track gauge 1,435 mm (4 ft 8+1⁄2 in)
Electrified 25 kV 50 Hz AC
History
Architect Weston Williamson
Designer Mott MacDonald and Systra
Constructed by Balfour Beatty VINCI
Construction end2026
Statistics
Daily traffic High-speed passenger trains
Location
Balsall Common Viaduct

Balsall Common Viaduct is a railway viaduct under construction in Balsall Common that will carry the High Speed 2 railway line. [1]

Contents

The finalised design of the viaduct was issued in February 2023; it will be a mostly concrete structure, comprising 16 piers and a bridge deck approximately 10 metres (33 feet) above ground. Various measures to mitigate acoustic, environmental, and community impact will be incorporated into the construction process and the finished viaduct.

Design

The Balsall Common Viaduct will carry the railway line over Station Road, Bayleys Brook, the Heart of England Way, and the local floodplain. [2] It will have a length of 425 metres (1,394 feet), be supported by 16 piers, and have a deck approximately 10 metres (33 feet) above ground. [3] The piers have been designed to minimise their visual impact as much as possible while still fulfilling all relevant technical requirements as structural members. [3] The viaduct will be constructed primarily of concrete and has been designed to require low levels of maintenance and to last for 120 years. [4] [5]

The viaduct features barrier parapets that incorporate an integrated acoustic surface to absorb the noise generated by passing trains. [4] These parapets will be polished as to intentionally reflect the sky in order to reduce the viaduct's visual impact. [3] Environmental impact mitigation measures include a native woodland planting scheme that will also provide screening of the viaduct; neighbouring land will also see hedgerow planting to improve wildlife connections. Bayleys Brook will be realigned to increase habitat for fish and aquatic invertebrates. [4] Existing public rights of way will also be maintained and a new public space of roughly one hectare will likely be provisioned, the specifics of which are to be based on community input. [4] [6]

The main contractor for the viaduct's construction is Balfour Beatty VINCI. [4] The method of construction would reportedly include the use of precast concrete beams along with other precast elements, such as the bridge parapets. Haulage routes between the site and the Lavender Hall Lane and Park Lane compound will be provisioned to separate the majority of construction traffic from the local road network. [4] Various temporary measures to minimise the impacts of HS2 on the landscape and environment will be implemented. [4]

Construction

Following a twelve month community consultation process, the finalised design for the viaduct was released during February 2023. [3] [7] The consultation process was criticised for a lack of alternative options for the viaduct being presented to the community. [8] [9] In May 2023, the British government overruled two rejections by Solihull Council for construction lorries bringing materials for the Balsall Common Viaduct works from driving on village roads; the rejections had been made on safety grounds, alleging that the roads lacked sufficient width and mitigating measures had not been satisfactory. [10] The project has been criticised for presenting a lack of alternative options during the community feedback stage, as well as for the additional road traffic that construction activity has generated.

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References

  1. ↑ Cramp, Tom; DeSouza, Naomi (5 August 2022). "HS2 viaducts: Residents react to Solihull plans". Business Live. Retrieved 10 February 2023.
  2. ↑ Williams, Oliver (9 February 2023). "HS2 viaduct plans in Balsall Common 'have taken local feedback into account'". WarwickshireWorld. Retrieved 10 February 2023.
  3. 1 2 3 4 White, Chloe (9 February 2023). "HS2's Balsall Common Viaduct plans reflect feedback from the local community". RailAdvent. Retrieved 10 February 2023.
  4. 1 2 3 4 5 6 7 "Balsall Common Viaduct". HS2. Retrieved 10 February 2023.
  5. ↑ Theron, Damien (16 November 2021). "Balsall Common Viaduct - Design and Access Statement" (PDF). Solihull Council - Planning. Retrieved 3 January 2024.
  6. ↑ "Balsall Common Viaduct Design" (PDF). hs2.org.uk. May 2022.
  7. ↑ Horgan, Rob (10 February 2023). "Final design revealed for HS2's Warwickshire viaduct". New Civil Engineer.
  8. ↑ Smith, Nick (22 July 2022). "Locals 'being treated like second class citizens' over HS2 viaduct plan". CoventryLive. Retrieved 10 February 2023.
  9. ↑ "Saqib Bhatti MP calls out HS2 over Balsall Common viaduct designs". saqibbhatti.org.uk. 20 July 2022.
  10. ↑ Johnson, Thomas (25 May 2023). "Ministers overrule council's decision to restrict HS2 Balsall Common Viaduct construction lorries". New Civil Engineer.
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