徐红波
(中铁七局集团第二工程有限公司，西安710032)

[摘要] 随着混凝土梁桥的不断推广和应用，在公路、铁路项目建设中出现了预应力简支梁、连续梁以及连续刚构等桥梁结构形式。该类梁桥在施工和使用过程中或因质量问题或因处置不当致使出现了许多裂缝，影响梁桥美观，更有甚者影响到使用功能。作为工程技术人员，如何做好裂缝成因分析和预防对策尤为重要。
[关键词] 预应力；混凝土梁桥；裂缝

    Causes of prestressed concrete girder bridge cracks and countermeasures
    Xu Hongbo
    (China Railway Seventh Group Second Engineering Co., Ltd., Xi'an 710032, China)

Abstract: With the continuous promotion and application of concrete girder bridge, prestressed simply supported beams, continuous beams and continuous rigid frame bridge structure and so on have emerged in road and railway projects. Because of quality problems or improper disposal, there were many cracks, and some cracks even affected the use function. As engineers, it is especially important to analyze the causes of cracks and preventive measures.
Keywords: prestress; concrete girder bridge; crack