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一、引言 新中国建立三十五年来,铁路桥梁建设有了飞速的发展。在幅员辽阔的国土上,修建了各式各样的铁路桥梁一万五千多座,共长九百八十余公里,其中在黄河上修建了大桥十七座;在长江上修建了大桥七座。随着国民经济的日益发展,铁路客货运量迅猛增长,这些桥梁都质量良好地发挥了作用,满足了运营的需要。著名的武汉长江大桥和南京长江大桥,是京广铁路和京沪铁路两条主要干线的要冲,建成使用以来,一直畅通无阻,根据测试资料,均不低于设计的安全度,建设质量是优良的。
I. Introduction Since the founding of New China for 35 years, the construction of railway bridges has seen rapid development. In a vast territory, built a variety of railway bridges more than 15,000, a total of more than 980 kilometers, of which the Yellow River built on the bridge 17; built in the Yangtze River Bridge VII seat. With the continuous development of the national economy, the volume of passenger and freight railways has grown rapidly. All these bridges have played a role of good quality and have met the needs of operation. The famous Wuhan Yangtze River Bridge and Nanjing Yangtze River Bridge, the Beijing-Guangzhou Railway and the Beijing-Shanghai Railway two main lines of impulse, built since its use, has been smooth, according to test data, are not less than the design of security, construction quality is excellent of.