浅谈斜交框架桥下穿既有铁路施工中的线路加固及防护

Discussion on Line Reinforcement and Protection in the Construction of Skew Frame Bridge Underpassing Existing Railway

随着“交通强国”战略不断深入,国家路网建设日趋完善,高速公路、城市道路下穿既有铁路的情况经常出现。做好铁路线路加固,确保列车不间断、安全运行,是框构桥下穿既有铁路施工中的关键环节。本文结合华丽高速公路下穿大丽铁路框架桥施工的成功案例,介绍了在困难条件下斜交框架桥下穿既有铁路顶进施工采取的线路加固和防护措施。

With the deepening of the"transportation power"strategy,the construction of national road network is becoming more and more perfect,and the situation of highways and urban roads underpassing existing railways often occurs.Doing a good job of railway line reinforcement to ensure uninterrupted and safe operation of trains is a key link in the construction of frame bridges undercrossing existing railways.Based on the successful construction case of Huaping-Lijiang Expressway undercrossing Dali-Lijiang Railway Frame Bridge,this paper introduces the line reinforcement and protection measures adopted in the jacking construction of skew frame bridge undercrossing existing railway under difficult conditions.