连续刚构桥顶推关键技术研究

Continous Rigid Frame Bridge Cantilever Casting Construction of Rhombic Hanging Basket Under Excessive Deflection Analysis

随着连续刚构桥桥型在我国桥梁建设中的广泛采用,顶推成为连续刚构桥施工过程中的关键工序。文章以怒江大桥(88+160+88 m的连续刚构桥)为依托,对顶推工序进行了详细介绍,提出了顶推力值的计算方法。计算过程中考虑了升温效应对结构产生的有利变形,及底板预应力束张拉造成的不利变形。研究结果为其他同类桥梁顶推力值的计算提供参考。

Along with the continuous rigid-frame bridge type widely used in bridge construction in our country, pushing has been proved to be the key working procedure in the process of continuous rigid-frame bridge construction. Takes the Nu River bridge （ continuous rigid-frame bridge with 88 ＋ 160 ＋ 88m） as the backing, the pushing processes is introduced in detail, and the calculation method of jacking force value is put forward. Both the favorable deformation of structure caused by temperature effect and the bad deformation caused by bottom plate prestress tension are considered in the calculation process. The research results can provide reference for the calculation of the pushing force value of other similar Bridges.