基于桥面增设车道的特大桥改造研究

Research on reconstruction of super-large Bridge based on adding lanes on bridge deck

桥梁建设阶段不可能完全考虑到将来的交通发展和通行变化,公路路网的完善和社会经济的发展,都可能对既有桥梁提出新的交通通行要求。对既有桥梁特别是特大桥梁进行改造以满足新的交通通行要求,具有节约工程造价、节约工期、延续桥梁使用寿命以及消除拆除重建产生的社会负面影响等现实意义。本文对某主跨198m的连续刚构特大桥桥面增设车道进行改造研究,从针对性桥梁检测、原设计核算、桥梁改造影响分析、改造实施方案等关键环节进行了分析和研究,得出了可靠的结论。本文的研究思路和结论,可为类似工程提供一定的参考。

In the stage of bridge construction,it is impossible to fully take into account the future traffic development and changes,the improvement of highway network and the development of social economy.Reconstruction of existing bridges,especially super-large ones,to meet the new traffic demand,the utility model has practical significance of saving project cost,saving construction period,extending bridge service life and eliminating the negative social influence caused by demolition and reconstruction.In this paper,a continuous rigid frame bridge with a main span of 198m has been reconstructed by adding a lane on the bridge deck,and the key links,such as the detection of the bridge,the original design calculation,the influence analysis of the bridge reconstruction,and the reconstruction implementation scheme,have been analyzed and studied,and came to a solid conclusion.The research ideas and conclusions of this paper can provide some references for similar projects.