实腹式圆弧拱桥病害机理分析与综合加固技术的研究

在分析蔡各庄拱桥病害机理的基础上,提出桥面补强层和拱圈增大截面加固、拱圈侧墙钢杆件拉结和下部增补桩基综合加固的方案。该方案不仅提高结构的承载力和整体刚度,而且有效地控制裂缝发展,在旧桥加固改造中有一定借鉴意义。

Analysis of Deterioration Mechanism and Research of Comprehensive Strengthening Techniques for Solid Spandrel Circular Arch Bridges

On the basis of analysis of the deterioration mechanism of Caigezhuang Arch Bridge,this paper proposes a scheme of comprehensive strengthening of the type of the bridges,including reinforcing of deck layers,enlarging of cross sections of arch rings,rigidly fixing of side walls of arch rings by steel members and adding of piles to substructure.The scheme in question can not only increase the carrying capacity and global rigidity of the bridges,but also can contribute to the effective control of propagation of cracks in concrete,and is of a certain reference to the strengthening and retrofitting of aged concrete arch bridges.