桩基托换时津滨轻轨列车通过安全性能的测试研究

Experimental Study on Safety Performance of Jinbin Light Railway with Train Passing While Pile Underpinning

桩基托换时会给轨道结构引入新的不平顺,给列车运行的安全性带来隐患。津滨轻轨桩基托换施工时不中断行车,为保证列车行驶的安全性,需对桥上轨道结构进行动载试验,以获得托换施工时的安全限速,并在限速施工时进行实时监测。结合测试结果,对桥梁的动力响应和车辆运行安全性能进行了分析,提出了进一步观测研究和加强维修的建议。

New track irregularity will be produced in pile underpinning, which may bring hidden trouble to the safety of the train running. The train operation wont be stopped when the foundation of Jinbin light railway bridge is being underpinned. In order to ensure the safety of the train operation, the dynamic load test is necessary to the railway structure on the bridge. The safe limit speed will be chosen from the test result, and the realtime monitoring will be continued during construction with the train passing at the limit speed. Based on the test result, this paper analyzes the response of the bridge and the safety performance of the train, and puts forward the suggestion for further observing, measurement and reinforcement.