东门大桥主桥加固改造

经过多座桥梁的加固工程实践,提出了拱桥加固的新方法。该方法是从拱背以上加固改造拱桥,主要加强拱顶和拱脚两控制截面,同时加强桥面铺装。实践证明,该方法具有如下明显优点:加固效果好、费用省、施工方便。结合福建沙县东门大桥主桥的加固改造,阐述了该方法的具体加固思路和加固措施;强调了运用该方法在加固跨径较大的拱桥时,应注意的一些特殊的计算方法及施工工序。

Strengthening Reconstruction of Dongmen Bridge(the Main Bridge)

A new method of strengthening arch bridge is applied through many strengthening bridge cases. The method will strengthen and reconstruct an arch bridge above the back of arch, and 2 control sections of the top and spring of arch are mainly strengthened. Meanwhile, the bridge deck paving is also strengthened. The case has proved the method has obvious advantages such as excellent streng-thening effect, low construction fee and convenience. Then combined with strengthening reconstruction of Dongmen Bridge(the main bridge) in Sha County,Fujian, its detailed strengthening idea and methods have been expounded. Several special calculation methods and construction process should be emphasized when running the method to strengthen large span arch bridges.