杨  跃
(哈尔滨工业大学土木工程学院，哈尔滨150090)

[摘要] 简要介绍了齐齐哈尔鹤城公路大桥的现状及拓宽改造要求，论述了对大桥主孔区段和边孔区段的拓宽改造方法，给出了拓宽改造对桩身、承台、墩柱、混凝土箱梁的受力影响及相关验算结果，提供了对大桥拓宽改造的投资分析。
[关键词] 桥梁工程；结构改造；预应力

    Research on widening scheme of Qiqihar Hecheng highway bridge
    Yang Yue
    (School of Civil Engineering, Harbin Institute of Technology, Harbin  150090, China)

Abstrat: The current status of Qiqihar Hecheng Highway Bridge and the widening requirements are briefly introduced. The widening methods for the main part and side part of the bridge are discussed. Then the influence of widening the bridge on mechanical property of pile, platform, pier column and concrete box beam are given as well as relevant check results. At last, investment analysis for the bridge is offered.
Keywords: bridge engineering;  structure reconstruction;  prestress