Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The UK's use of thick steel plates in medium span railway bridges
The first stage of the EUR 11.4 billion West Coast Mainline modernisation project to upgrade the UK's principal rail route from London to Glasgow and key cities in the North West of England was completed in December 2005. On a line originally built in the 1840s and last modernised in the 1960s, the upgrade increased the line speed to 220 kph. Over 1000 bridges have been assessed for the effects of high speed traffic and the bridges likely to be prone to ballast instability under the new loading regime identified. Where practicable the bridges have been modified, however some short span bridges had to be replaced. For this, Mott MacDonald developed a new, standard bridge deck for high speed railway lines that utilises thick steel plates. The new structural form developed is very simple. It is a half through deck fabricated from steel plates up to 200mm thick, thicknesses not normally associated with UK bridge construction. The result is a robust and dynamically stable structure with a very shallow construction depth, typically no greater than 900 mm while providing 300 mm of ballast below the sleepers. Although initially developed for high speed operation, bridges with these properties are frequently sought when replacing existing, UK medium span bridge decks on lines where the speed is less than 160 kph. In 2006 Mott MacDonald modified the original thick steel plate deck details to be suitable for such applications. This presentation describes the evolution of what has become known as the Mott MacDonald U deck, the analyses undertaken and the details that resulted in the successful fabrication and installation of seven spans on high speed lines between 2002 and 2004, and two spans on non high speed lines in 2007.
The UK's use of thick steel plates in medium span railway bridges
The first stage of the EUR 11.4 billion West Coast Mainline modernisation project to upgrade the UK's principal rail route from London to Glasgow and key cities in the North West of England was completed in December 2005. On a line originally built in the 1840s and last modernised in the 1960s, the upgrade increased the line speed to 220 kph. Over 1000 bridges have been assessed for the effects of high speed traffic and the bridges likely to be prone to ballast instability under the new loading regime identified. Where practicable the bridges have been modified, however some short span bridges had to be replaced. For this, Mott MacDonald developed a new, standard bridge deck for high speed railway lines that utilises thick steel plates. The new structural form developed is very simple. It is a half through deck fabricated from steel plates up to 200mm thick, thicknesses not normally associated with UK bridge construction. The result is a robust and dynamically stable structure with a very shallow construction depth, typically no greater than 900 mm while providing 300 mm of ballast below the sleepers. Although initially developed for high speed operation, bridges with these properties are frequently sought when replacing existing, UK medium span bridge decks on lines where the speed is less than 160 kph. In 2006 Mott MacDonald modified the original thick steel plate deck details to be suitable for such applications. This presentation describes the evolution of what has become known as the Mott MacDonald U deck, the analyses undertaken and the details that resulted in the successful fabrication and installation of seven spans on high speed lines between 2002 and 2004, and two spans on non high speed lines in 2007.
The UK's use of thick steel plates in medium span railway bridges
Der Einsatz von dicken Stahlblechen für Eisenbahnbrücken mit mittlerer Spannweite in Großbritannien
Palmer, Ian (Autor:in) / MacDonald, Mott (Autor:in)
2007
46 Seiten
(plus 45 Folien)
Aufsatz (Konferenz)
Datenträger
Englisch
Steel railway bridges of large span
| Engineering Index Backfile | 1927
| Engineering Index Backfile | 1896
Some short span railway bridges
Engineering Index Backfile | 1899
| Engineering Index Backfile | 1896
Construction of short span railway bridges
| Engineering Index Backfile | 1898