临近道路沉降对桥梁结构影响分析及处治措施

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

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。

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.