（1 昆明市公路局， 昆明 650032； 2 北京中交桥宇科技有限公司， 北京 100102）

［摘要］某桥梁结构临近软土地基路段，受到道路沉降影响而出现严重病害。对该桥梁裂缝和临近道路的沉降进行了调查，总结了该桥梁结构的主要病害特征。采用多种有限元软件（PLAXIS，MIDAS FEA，MIDAS Civil）对病害原因进行有限元模拟分析，结合有限元分析结果和现场测量结果着重分析了临近道路沉降对该桥梁结构的影响，总结了该桥梁结构病害产生的原因。最后根据病害的产生原因，针对该桥梁结构不同部位分别提出了相应的处治措施，并通过加固前后PLAXIS数值模拟结果的对比分析，说明了该处治措施的可行性和预期效果。

［关键词］桥梁； 临近道路； 沉降； 数值模拟； 处治措施

中图分类号：TU279-7+2,TU375文献标识码：A文章编号：1002-848X(2018)04-0103-06

Analysis and treatment measures of influence on bridge structure by adjacent road settlement

Li Minghong1， Zhang Rui2

(1 Kunming Highway Bureau, Kunming 650032, China； 2 Beijing CCCC Qiaoyu Science and Technology Co., Ltd., Beijing 100102, China)

Abstract:A bridge structure is adjacent to the section of soft soil foundation, and serious damages are caused by the road settlement. The settlements of bridge crack and adjacent road were investigated and the damage characteristics of bridge structure were summarized. A variety of finite element software (PLAXIS, MIDAS FEA and MIDAS Civil) were used to conduct finite element simulation analyses of the causes of damages. Combined with the results of finite element analyses and field measurement results, the influence of adjacent road settlement on the bridge structure was analyzed, and the reasons for the occurrence of damages of bridge structure were summed up. Finally, according to the causes of the damages, corresponding treatment measures were put forward for different parts of the bridge structure. The feasibility and expected effect of the treatment measures were illustrated through comparative analyses of PLAXIS numerical simulation results before and after reinforcement.

Keywords:bridge; adjacent road; settlement; numerical simulation; treatment measure

作者简介：李洪明，高级工程师，Email:826238043@qq.com。