{"id":96393,"date":"2021-07-19T10:00:05","date_gmt":"2021-07-19T09:00:05","guid":{"rendered":"https:\/\/www.pbctoday.co.uk\/news\/?p=96393"},"modified":"2021-07-19T10:00:05","modified_gmt":"2021-07-19T09:00:05","slug":"hs2-viaduct-design","status":"publish","type":"post","link":"https:\/\/www.pbctoday.co.uk\/news\/planning-construction-news\/hs2-viaduct-design\/96393\/","title":{"rendered":"HS2 designers cut carbon with new viaduct design"},"content":{"rendered":"

\"HS2<\/h2>\n

HS2<\/a> designers are on track to more than half the amount of embedded carbon in one of the high speed rail project\u2019s viaducts<\/h2>\n

The innovative \u2018double composite\u2019 approach \u2013 which involves two steel girders sandwiched between two layers of reinforced concrete to create a lightweight span \u2013 will be used on the Wendover Dean Viaduct in Buckinghamshire.<\/p>\n

The 450m viaduct was recently given approval by Buckinghamshire Council<\/a> under Schedule 17 of the HS2 Act and it will be the first major railway viaduct<\/a> in the UK to use the \u2018double composite\u2019 approach.<\/p>\n

Working in collaboration<\/h3>\n

Designed by HS2 Ltd\u2019s main works contractor, EKFB \u2013 a team made up of Eiffage, Kier, Ferrovial and BAM Nuttall \u2013 working with their design partner, ASC and Moxon, the viaduct is one of 50 being built<\/a> on the first phase of HS2 between London and the West Midlands.<\/p>\n

As well as cutting the amount of concrete and steel<\/a> \u2013 one of the major sources of CO2 \u2013 the slender design also reduces the silhouette of the structure viewed from across the valley. Nine evenly spaced piers will support the deck of the viaduct and will be placed to carefully reflect the near symmetry of the ground beneath.<\/p>\n

The beams themselves will be made from weathering steel, which will age to a characteristically dark russet finish and echo the natural tones of the surrounding landscape.<\/p>\n

When viewed from a distance, against the weathered steel, the pale concrete parapet will appear as a thin horizontal band hovering over the slender piers as it glides over the valley and make the whole structure look thinner.<\/p>\n

This effect will be further emphasised by the viaduct piers, which have been extended to almost connect with the parapet, helping to give the appearance of a light and narrow structure.<\/p>\n

The historic field boundaries and hedgerows will be recreated after the viaduct is built to provide uninterrupted access for farmers and local residents.<\/p>\n

A mix of trees and shrubs commonly found across the Chiltern chalk hills<\/a> will be used for new woodland planting around the viaduct, including Oak, Beech, Hazel and Wild Cherry.<\/p>\n

EKFB\u2019s technical director Janice McKenna, said: \u201cThis viaduct was inspired by the innovative design in France, but has been enhanced and developed in the context of the Chilterns.<\/p>\n

\u201cOur design solutions are always created with people and legacy in mind and I am really proud of the carbon savings that the Wendover Dean Viaduct represents.\u201d<\/p>\n

\n<\/div>","protected":false},"excerpt":{"rendered":"

HS2 designers are on track to more than half the amount of embedded carbon in one of the high speed rail project\u2019s viaducts.<\/p>\n","protected":false},"author":20,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[304],"tags":[473,579,928,32292],"stakeholder_rel_tag":[],"contributor_rel_tag":[],"class_list":{"0":"post-96393","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-planning-construction-news","7":"tag-hs2","8":"tag-infrastructure","9":"tag-rail-network","10":"tag-steel"},"acf":[],"yoast_head":"\nHS2 designers cut carbon with new viaduct design<\/title>\n<meta name=\"description\" content=\"HS2 designers are on track to more than half the amount of embedded carbon in 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