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先简支后连续梁施工特点是先按简支梁规模化预制安装施工,后通过浇筑连续段、张拉负弯矩预应力筋以及拆除临时支座,实现由简支梁到连续梁的转换,从而得到连续梁优越的使用效果。本文对先简支后连续桥梁的施工关键问题进行了探讨,特别是运梁施工活载对先简支后连续结构的影响,并提出了最优的施工工艺,达到更好地控制质量的目的。
After the first simply supported by the construction of the continuous beam is characterized by the first simple-supported beams prefabricated installation of construction, after the pouring of the continuous section, the tension of prestressed tendons and the negative moment to remove the temporary support, to achieve from simple to continuous beam beam conversion , Resulting in continuous use of superior beam effect. In this paper, the key issues of the construction of the first simple supported continuous bridge are discussed, especially the influence of live load on the first simple supported continuous structure and the optimal construction technology to achieve the purpose of better quality control .