关键词: 基坑开挖, 铁路隧道, 有限元分析, 变形分析, 风险识别, 风险控制措施

Abstract: To study the deformation characteristics of adjacent railway tunnels induced by the foundation excavation of new projects nearby, and to identify these risks to existing railway tunnels during the deep excavation, effective control measures are proposed. This paper presents a deep excavation of the real estate project in Longyan area. The effect of the excavation on the adjacent railway tunnel was numerically simulated by using the MIDAS-GTS three-dimensional finite element calculation software. Risks associated with operating adjacent railway tunnels and corresponding control measures are evaluated with the foundation excavation process. The analysis results show that with the increase of the excavation depth, the deformation of the railway tunnel is also larger. The deformation of the railway tunnel and railway facility should be monitored during the deep excavation. The risk factors should consider the site-specific conditions, such as, survey data, design parameters, construction methods, construction equipment and machinery, construction personnel, etc.

Key words: Deep Excavation, Railway Tunnel, Finite Element Analysis, Deformation Analysis, Risk Identification, Risk Control Measures