前言本桥在群马县境内的上越新干线上,位于长大的榛名隧道(15.35公里)与中山隧道(14.83公里)之间,是跨越吾妻川的长大预应力混凝土桥梁。桥式为两跨连续的T型刚构,是复线单室箱梁桥。下部工程采用气压沉箱法施工;上部工程采用后张悬臂法施工。以下介绍本桥的设计与施工。 Preface This bridge is located on the Joetsu Shinkansen in Gunma Prefecture, between the Hazelnorm Tunnel (15.35 km) and the Zhongshan Tunnel (14.83 km). It is a long-spanned prestressed concrete bridge that stretches across the Azuma River. The bridge is a two-span continuous T-shaped rigid frame, which is a double-line single-chamber box girder bridge. The lower part of the project adopts the method of pressure caisson construction; the upper part of the project adopts the post-tensioned cantilever construction method. The following describes the design and construction of the bridge.