明挖市政隧道上跨既有轨道交通结构安全保护实践

Practice on Protection of Existing Rail Transit Structure under Open Cut Utility Tunnel

轨道交通在不断加快城市发展的同时,与城市市政工程的联系也日趋紧密,轨道交通结构安全保护也越来越重要。结合合肥某明挖市政隧道上跨既有轨道交通项目,给出了外部作业对轨道交通结构的影响等级和安全保护控制指标,介绍了轨道交通结构安全保护方案,通过数值模拟结果与实测结果进行对比分析,提出了类似工况下的解决方案。

As urban rail transit project is promoting the city development,it has a closer connection with urban municipal engineering and the protection of rail transit structure is becoming more and more important.Combined with the construction of an open cut utility tunnel over the existing rail transit project in Hefei,the influence level of construction on rail transit structure are studied and protection and control index are proposed.And the protection scheme for the rail transit structure is introduced.The solutions for the similar working condition are proposed based upon the analysis and comparison of the numerical simulation results and the site measured data.