Dimensionless Parameter Diagrams for the Active and Passive Stability of a Shallow 3D Tunnel Face
Dimensionless Parameter Diagrams for the Active and Passive Stability of a Shallow 3D Tunnel Face
复制标题
浅层 3D 隧道掌子面主动和被动稳定性的无量纲参数图
DOI：
10.1007/s12205-018-5835-0
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发表时间：
2019-02-01
影响因子：
2.2
通讯作者：
Cheng, Xiao
中科院分区：
文献类型：
--
作者：
Zhao, LianHeng;Li, DeJian;Cheng, Xiao
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 phi and dimensionless parameter C/D for both active and passive failure; by contrast, dimensionless parameters D/c and sigma(s)/c have small effects. It is also found that dimensionless parameters C/D and sigma(s)/c have no effect on the results if the failure region does not reach the ground surface.
