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通县西立交单线2×24m、怀柔京丰立交双线20m两座预应力混凝土铁路槽型梁桥是我国铁路上第一次采用的新结构。这一科研成果,为我国在低高度预应力混凝土梁的体系中增加了新的结构品种。 由于槽型梁受力复杂,在建造实桥之前进行了一系列的理沦研究工作:推导了按立体计
Tongxian West Interchange single line 2 × 24m, Huairou Jingfeng Interchange double line 20m two prestressed concrete railway trough girder bridge is the first time the new structure of the railway. This scientific research results for our country in the system of low prestressed concrete beams added new structural varieties. Due to the complicated mechanical behavior of the trough beam, a series of theoretical studies were conducted prior to the construction of the actual bridge: a three-dimensional