邻近施工影响下既有高速铁路自动化监测技术

Automatic Monitoring Technology of Existing High-Speed Railway Considering the Influence of Close Construction

为掌握临近施工对既有高铁运营风险的影响,依托新建江苏南沿江城际铁路临近既有宁杭高铁工程,针对桥穿桥、桥并桥、路并桥和路并路四种典型并行区段,通过有限元分析指导测点选择,构建了集评估、监测、预警等为一体的风险管控技术体系。应用结果表明,该技术可定量掌握临近施工对既有高铁线路结构沉降变形的影响规律,保障了既有高铁的安全运营和临近施工的有序进行。

In order to obtain the impact of close construction on operation risk of the existing high-speed railway(HSR),a risk management and control technology system including evaluation,monitoring and early warning is constructed.The technology system was used on bridge-crossing-bridge,bridge-paralleling-bridge,subgrade-paralleling-bridge and subgrade-paralleling-subgrade typical segments between newly-built Jiangsu South Riverside Intercity Railway and existing Nanjing-Hangzhou HSR.And the test point selection of the system was guided with finite element analysis.The result of application shows that the technology can used to get the influence law of close construction on the structural settlement of existing HSR,thus ensuring the safe operation of existing HSR and orderly conduct of close construction.