郭家湾大桥的加固改造研究

A Study on Reinforcing and Reconstruction of Guojiawan Bridge

郭家湾大桥建成5a后发现腹拱、桥台、侧墙多处开裂,经过对产生裂缝的原因进行分析后,针对病因提出了注浆、增加桥台基础刚度等加固改造措施。对桥台及挡土墙的施工程序和施工要点作了详细介绍。加固后效果良好,可供其他类似的桥梁加固借鉴。

Five years after the completion of Guojiawan Bridge, many cracks are found in spandrel arch, abutment and side wall. Based on the analysis on cracking causes, reinforcing and reconstruction measures are proposed on grouting, increasing rigidity of abutment base etc, and detail introduction is presented on construction process and key points of abutment and retaining wall. The reinforcing results are good for reference of similar reinforcing cases of bridges.