Abstract:

 During the construction of the entrance section of Yangziling tunnel on the second XiangfanChongqing railway line, Dtype temporary beam is used to consolidate the existing railway line when the tunnel crosses underneath. Taking the project as an example, the author presents the type selection and arrangement calculation of Dtype temporary beam and provides the technical details of the existing railway consolidation construction, including construction method, key construction points, monitoring and safety guarantee measures.