The Characteristics and Influencing Factors of Pressure Arch Structure in Soft Tunnel Surrounding Rock
The excavation of a tunnel disturbs and balances the stress field of surrounding rock,resulting in the formation of a pressure arch with similar structural characteristics within the stratum.The study of the characteristics of pressure arch in weak tunnel surrounding rock can offer a more solid foundation for tunnel support design.The numerical analysis model of a circular tunnel was established based on the concept of tunnel pressure arch in weak tunnels,taking into account the influence of surrounding rock quality,tunnel depth and tunnel span.
weak surrounding rocktunnel engineeringpressure archnumerical model
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