BOSTON CENTRAL ARTERY/TUNNEL PROJECT: INNOVATIVE USE OF PRECAST SEGMENTAL TECHNOLOGY

摘要

Boston's Central Artery/Tunnel Project is the largest infrastructure undertaking ever attempted at a single US location. It involves reconstructing Interstate Highway 93 (I-93) by depressing it into a tunnel and subsequently removing the original elevated highway (known as the Central Artery). The new I-93 will emerge from the tunnel near the south bank of the Charles River and rise to cross the river on a cable-stayed bridge. This structure, unique in the world, will be both longitudinally and transversely asymmetrical. The second phase of the project extends the Massachusetts Turnpike (I-90) through South Boston and under Boston Harbour to Logan International Airport. This paper reports on the innovative aspects of the project's segmental concrete interchanges, which resulted in superior quality and constructibility.