既有铁路病害路基改桥梁施工方法研究

摘要

既有铁路一段半填半挖路基受外部因素影响出现裂缝、下沉外鼓，威胁铁路行车安全。为保障铁路运营安全，采用路改桥措施，以桥梁形式通过病害路基地段。且要满足在不中断铁路运营的情况下施工，采用 D 型施工便梁将线路架空后，施工墩台及基础，人工架梁。该施工方法可为类似工程提供参考。%Influenced by external factors,the part-cut and part-fill subgrade of the existing railway appears cracks,sinking and bulging,which will endanger the safety of railway transport.To ensure the safety of railway transport,a bridge instead of the subgrade is built to pass through the diseased subgrade,while the construction of the bridge should under the condi-tion of uninterrupted railway operation.The abutments and their foundations will be erected manually after adopting the D-shaped temporary beam overheading the lines.The construction method can provide a reference for similar projects.