Numerical Simulation Study of Midas-Based Tunnel Section Structural Forces and Deformations

Junwei Xu

doi:10.54097/ynyz9y06

Authors

Junwei Xu

DOI:

https://doi.org/10.54097/ynyz9y06

Keywords:

Tunnel Engineering, Railway Tunnel, Tunnel Bottom Uplift, Midas Modeling Techniques, Virtual Simulation Model Testing.

Abstract

The burial depth significantly influences the structural forces and deformations of tunnel sections, playing a crucial role in the safe operation of tunnels. This study focuses on the structural design and deformation analysis in underground tunnel engineering. Utilizing Midas modeling techniques, tunnel models were designed for experimentation to comprehensively explore the impact of tunnel burial depth and key design parameters on structural deformations and safety.(1) The research reveals that design parameters such as tunnel diameter are the dominant factors affecting deformation, lining pressure, and structural displacement.(2) With an increase in tunnel diameter, substantial deformation occurs, and the lining pressure distribution evolves from a "fan-shaped" pattern to a "peach-shaped" pattern. The bottom structure transitions from uplift to slight settlement. (3) The study results provide a rational range of parameter values for tunnel design. Simulation outcomes highlight areas with higher deformation, offering insights for proposing corresponding remedial measures.

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