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用预应力混凝土桥取代钢桥,能节省大量钢材和养护费用,减少噪音。而我国预应力混凝土铁路桥的标准设计,最大跨度仅达31.7米。因此,发展大跨度预应力混凝土桥是我国铁路建设中一项十分必要而又迫切的任务。
Replacing steel bridges with prestressed concrete bridges saves a lot of steel and maintenance costs and reduces noise. The standard design of China’s prestressed concrete railway bridge, the maximum span of only 31.7 meters. Therefore, the development of long-span prestressed concrete bridges is a very necessary and urgent task in railway construction in our country.