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Mechanical Behaviour of Shallow Tunnel in Unsymmetrical Strata
Triaxial compression tests have been performed to determine the properties of the surrounding rock. The displacement and stress of surrounding rock have been analyzed according to Silin 2 at Yungui railway under three kinds of conditions: the initial state, excavation without supporting, and supporting after excavation. Plane strain FEM is established to analyze the stability of the surrounding rock. Contrasted the monitor measuring data, the results show that: the most unfavorable position in the tunnel is found at the ridge side of the arch; and the implementation of support to ensure the stability of surrounding rock, and the design of the early support approach to meet the safety requirements. The results have a certain significance for understanding the mechanical behavior of shallow tunnel in unsymmetrical strata.
Mechanical Behaviour of Shallow Tunnel in Unsymmetrical Strata
Triaxial compression tests have been performed to determine the properties of the surrounding rock. The displacement and stress of surrounding rock have been analyzed according to Silin 2 at Yungui railway under three kinds of conditions: the initial state, excavation without supporting, and supporting after excavation. Plane strain FEM is established to analyze the stability of the surrounding rock. Contrasted the monitor measuring data, the results show that: the most unfavorable position in the tunnel is found at the ridge side of the arch; and the implementation of support to ensure the stability of surrounding rock, and the design of the early support approach to meet the safety requirements. The results have a certain significance for understanding the mechanical behavior of shallow tunnel in unsymmetrical strata.
Mechanical Behaviour of Shallow Tunnel in Unsymmetrical Strata
Yang, Shang-Yang (author)
2012
4 Seiten
Conference paper
English
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