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预应力施工是桥梁上部结构是桥梁上部结构施工的控制性关键工序,其施工质量直接影响到结构的使用性和安全性。文章从陕西省渭南市湭河入渭口堤防交通桥工程实际出发,探讨非对称预应力筋在两端张拉时伸长量的计算方法,并总结了影响该工程预应力筋理论伸长值的若干因素及其合理取值,通过改进计算方法提高计算的准确性,达到有效控制预应力施工的效果。
Prestressed construction is the bridge superstructure is the control of the bridge superstructure construction of the key processes, the construction quality of a direct impact on the structure of the use and safety. Based on the actual project of embankment traffic bridge at Weihekou in Weinan City, Shaanxi Province, this paper discusses the calculation method of the elongation of asymmetrical prestressing tendons at both ends of the embankment and summarizes the influence of the theoretical elongation value Of some factors and their reasonable value, by improving the calculation method to improve the accuracy of the calculation, to effectively control the effect of prestressed construction.