Analysis of Partial Coefficients of Single-Track Railway Tunnel Portal Structures

According to the calculation characteristics of railway tunnel portal structure, the limit states design equations of tunnel portal structure reliability are established. Based on the given object reliability indexβnom, the partial coefficients of tunnel portal structure are calculated, and the basic principle and specifics process of the calculation are presented. In addition to that, the influencing factors and probabilistic meanings of the partial coefficients are discussed through a practical example.