八十年代以来竣工的且跨度较大的铁路桥梁约有20座左右(表1),其中多数桥梁都不同程度地采用了国内外在桥梁科学技术领域内的新技术,有的并发展了这些新技术。下面简单地列述部份桥梁的特点,以说明八十年代中国铁路桥梁在桥式、跨度、材料、施工方法等方面都有较大的发展,并具有较高的水平。 (一)永定新河桥 为我国跨度最大的栓焊梁桥。截面高800mm的主桁杆件及部份节 Some 20 railway bridges are completed since the 1980s and have a long span (Table 1). Most of the bridges adopted new technologies at home and abroad in the field of bridge science and technology, and some developed these new technology. The following briefly describes some of the characteristics of the bridge to illustrate the eighties China’s railway bridges in the bridge, span, materials, construction methods have greater development, and have a higher level. (A) Yongding New River Bridge is the largest span welded bridge in China. 800mm high section of the main truss rod and some sections