Study on the Stability of Tunnel with Large Cross Section Based on the Ultimate Strength Reduction Method

Abstract:

The stability and the instability form of tunnel surrounding rock have always been hotspot and difficulty problems in underground engineering. We combined the finite element method with the strength reduction method to study the stability of the surrounding rock in tunnel with large cross section. To study the vault settlement, ground settlement and some feature points’ displacement, we used ADINA software to establish a simulation model, from which we can get the relationship between the strength reduction factor and data such as the maximum principal stress and the maximum plastic strain. Also, with analyzing the stability of tunnel surrounding rock, we defined the safety coefficient as 2.5 at last. Then, the tunnel’s weak position during the excavation projects and corresponding strengthening measures can be found through analyzing tunnel stress condition.

• Periodical: Applied Mechanics and Materials (Volumes 602-605)
• Pages: 590-593
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.602-605.590
• Online since: August 2014
• Authors: Hui Chao Zhou*, Rui Jun Liu
• Keywords: Finite Element Method (FEM), Tunnel with Large Cross Section, Ultimate Strength Reduction Method

References

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