以辽宁省新民市西大林桥为依托 ,对其进行了横向、纵向挠度以及静态应变实验 ,所得数据利用旧桥检算系数法对其进行了承载能力评定 ,其结果为该桥的加固提供了依据 ,同时按照大边梁理论提出了加固改建要点 ,并对加固后的方案合理性进行了承载能力鉴定 ,其结果满足要求 ,进一步表明了加固改建效果合理可靠 ,旨在为类似旧桥承载能力评定与加固提供参考 . Based on Xidalin Bridge in Xinmin City, Liaoning Province, horizontal and vertical deflection tests and static strain tests were carried out. The obtained data were evaluated by using the old bridge coefficient of determination method, and the results provided the reinforcement for the bridge According to the theory, the main points of reinforcement and reconstruction were put forward according to the theory of large side beams, and the bearing capacity of the reinforced plan was evaluated. The results met the requirements and further proved that the reinforcement and reconstruction works are reasonable and reliable, Evaluation and reinforcement provide a reference.