Abstract: With the continuous advancement of urban underground space development, the number of foundation deep excavation projects adjacent to railway subgrades is increasing. The soil deformation caused by foundation excavation may pose a significant threat to the stability and operational safety of railway embankments. This paper presents a deep foundation excavation project adjacent to a railway embankment as the case history. By using numerical simulation methods, the distribution characteristics of the soil displacement field during the foundation excavation process are analyzed and the influence pattern of deep excavation construction on the settlement and horizontal displacement of the adjacent embankment are investigated. The research results show that the embankment settlement caused by the excavation increases nonlinearly with the increase of excavation depth, and the maximum deformation of the embankment adjacent to the railway is 5.3mm. During the excavation, the settlement changes within the roadbed range are relatively small, the gauge deviation is small, and the deformation of the roadbed meets the requirements of the deformation control standards for regular maintenance. The deep excavation construction has a relatively small impact on the settlement and deformation of the Jiaobranch line. It can provide theoretical basis and technical reference for the design and impact analysis of similar projects.

Key words: Deep Excavation, Excavation, Embankment, Impact Analysis