【摘要】 通过对荥经大桥现状的实地调查,分析了桥梁的承载能力,提出了采用预应力箱型梁进行拓宽加固的改造方案,简要分析了该方案受力特点和技术经济优势。实践证明该方案在不中断交通的情况下,减少了与旧桥的冲突,有效地提高了桥梁的承载能力,具有明显的社会经济效益。更多还原

【Abstract】 On the basis of on-the-spot survey, the load bearing capacity of the Yingjing Bridge was analyzed.Then,a proposal of widening and reinforcing the bridge by installing a box-girder was put forward and finally, the load bearing features and technical and economical advantages of the proposed project was presented. The empirical statistics show that the implementation of the project will effectively improve the load bearing performance of the bridge. Furthermore, the proposal can guarantee the normal traffic flow while the existing bridge is under construction and thus is social-economically effective.更多还原