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预应力混凝土连续梁桥具有经济适用、外型美观等优点,目前已在国内外广泛采用。本文根据我国几座公路大桥的设计与施工经验,提出以下要点,供修建这种桥梁时参考: 1.综合国内外资料,提出主要工程材料指标,供估计工程数量用。 2.根据经验数据和公式,拟定截面尺寸,以编制经济合理的初步设计方案。 3.设计理论方面应考虑的问题,用“公路桥梁综合计算程序”解算由于荷载和各种影响产生的各应力,给出控制截面的最不利应力组合和节点变位。 4.采用悬臂施工法,拟定合理的施工步骤和各阶段转换的体系。
Prestressed concrete continuous beam bridge has the advantages of economical, beautiful appearance, it has been widely used at home and abroad. Based on the experience of design and construction of several road bridges in our country, this paper puts forward the following points for reference when building such a bridge: 1. Based on domestic and foreign data, the main engineering material indicators are proposed for estimating the amount of construction projects. 2. According to the empirical data and formulas, the preparation of cross-sectional dimensions, in order to prepare a reasonable initial design. 3. Design theory should consider the issue of “highway bridge comprehensive calculation program” to solve the load and various effects arising from the stress, the control section of the most unfavorable stress combinations and node displacement. 4. The use of cantilever construction method, to develop a reasonable construction steps and stages of conversion system.