经过有关方面的积极和艰苦努力,近年来在我国铁路上有两个采用部分预应力混凝土桥梁的突出实例。1987年1月13日铁道部科技局在北京召开了“部分预应力混凝土梁技术审查会”,对16m跨度的部分预应力混凝土铁路梁的研制工作进行了审查。代表们通过讨论一致认为部分预应力梁使用性能良好并且具有一定的经济效益,是预应力混凝土结构的发展方 After active and painstaking efforts by relevant parties, there have been two outstanding examples of using partially prestressed concrete bridges in our country’s railway in recent years. On January 13, 1987, the Bureau of Science and Technology of the Ministry of Railways convened the “Technical Review Conference of Partial Prestressed Concrete Beams” in Beijing to examine the development of 16 m-span partially prestressed concrete railway beams. Through discussion, all the delegates agreed that the use of some prestressed beams is good and has certain economic benefits. It is the development of prestressed concrete structures