Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Dimensionless Parameter Diagrams for the Active and Passive Stability of a Shallow 3D Tunnel Face
Abstract The methods for calculating the elliptical cone’s geometric parameters of multiple elliptical cone sliders were improved by introducing expression of elliptical path in 3D space. This elliptical path is the intersecting line of a cone and inclined cutting plane. Based on upper-bound limit analysis method and an improved method, Sequential Quadratic Programming (SQP) method was employed to obtain optimal upper bound solutions of failure pressure. The effectiveness of this method was verified by a comparative analysis, and a detailed parametric study on the failure pressure and failure modes was presented. In this study, the stability and failure modes of tunnel face are significantly affected by internal friction angle φ and dimensionless parameter C/D for both active and passive failure; by contrast, dimensionless parameters γD/c and σ s /c have small effects. It is also found that dimensionless parameters C/D and σ s /c have no effect on the results if the failure region does not reach the ground surface.
Dimensionless Parameter Diagrams for the Active and Passive Stability of a Shallow 3D Tunnel Face
Abstract The methods for calculating the elliptical cone’s geometric parameters of multiple elliptical cone sliders were improved by introducing expression of elliptical path in 3D space. This elliptical path is the intersecting line of a cone and inclined cutting plane. Based on upper-bound limit analysis method and an improved method, Sequential Quadratic Programming (SQP) method was employed to obtain optimal upper bound solutions of failure pressure. The effectiveness of this method was verified by a comparative analysis, and a detailed parametric study on the failure pressure and failure modes was presented. In this study, the stability and failure modes of tunnel face are significantly affected by internal friction angle φ and dimensionless parameter C/D for both active and passive failure; by contrast, dimensionless parameters γD/c and σ s /c have small effects. It is also found that dimensionless parameters C/D and σ s /c have no effect on the results if the failure region does not reach the ground surface.
Dimensionless Parameter Diagrams for the Active and Passive Stability of a Shallow 3D Tunnel Face
Zhao, LianHeng (Autor:in) / Li, DeJian (Autor:in) / Yang, Feng (Autor:in) / Li, Liang (Autor:in) / Cheng, Xiao (Autor:in)
KSCE Journal of Civil Engineering ; 23 ; 866-878
17.12.2018
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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