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预应力混凝土槽形梁能较好地适应现代化铁路建设要求修建大量立交桥的需要,有较高的经济效益。本文概述了我国设计的跨度24m单线槽形梁与其它桥跨结构的比较,对槽形梁结构的分析、计算方法、设计规定及施工方案、工艺等作了重点的介绍。槽形梁新技术研究协作组研究试制了单线跨度24m及双线跨度20m两种槽形梁,本文对该两桥设计、施工中的特殊问题作了扼要的介绍。
Prestressed concrete trough beam can better meet the requirements of the construction of a large number of modern railway construction overpass needs a higher economic efficiency. This paper summarizes the comparison between 24m single-track trough girders designed in our country and other bridge structures, and introduces the analysis, calculation method, design rules, construction scheme and technology of trough girders. Trough beam new technology research collaboration group pilot trial of the single-span 24m and two-span 20m two trough beams, this paper on the design and construction of the two bridges are briefly introduced the special problems.