Viaduct Engineering of The National Freeway No. 1 Widening Works in Taiwan

摘要

The Widening Project of Wugu to Yangmei section of Taiwan’s National Freeway No.1, with total length of 40 km, was completed within four years. This Widening Project was aimingto improve the traffic quality and to regain the smoothness of traffic circulation on the northernend of Freeway No. 1 of Taiwan. The widening works travels along both sides of the existingfreeway and 85% of the construction are viaducts. The project was commenced in October 2009and was completed and opened to traffic in April 2013.To consider the limitation of environmental influence and construction, steel structure wasadopted for some long span bridge and double deck bridge. Three distinctive bridges werepresented in this article too. Two of them stand across the Freeway No.1 and also be known asthe longest span of the steel girder bridge in Taiwan. The other is a double deck viaduct betweenTaishan and Linkou section with eccentric single pier.