A real-life stability model for a large shield-driven tunnel in heterogeneous soft soils

被引：0
|
作者：
Xinyu Hu
Zixin Zhang
Scott Kieffer
机构：
[1] Shanghai Institute of Technology,Department of Civil Engineering
[2] Tongji University,Department of Geotechnical Engineering, College of Civil Engineering
[3] Graz University of Technology,Institute of Applied Geosciences
来源：
Frontiers of Structural and Civil Engineering | 2012年 / 6卷 / 2期
关键词：
analytical solution; shield-driven tunnel; multilayered soil; face stability;
D O I：
10.1007/s11709-012-0149-7
中图分类号：
学科分类号：
摘要：
The current models that have been published to date only allow for homogeneous soil at the tunnel face. This paper presents a real-life face stability model to determine the minimal pressure needed at the tunnel face for a large shield-driven tunnel in heterogeneous soft soils. It is found that the influence of multilayered soil boundaries is significant, especially for the mixed-layer (e.g., sand and clay) soils. The suggested M-M model is developed by considering the influence of the heterogeneity of the soil on the angle of slip and the minimal support pressure. Comparisons of the solutions in mixed-layer soils are conducted, and the effects of the involved parameters for a large, multilayered, shield-driven tunnel are also investigated.
引用
收藏
页码：176 / 187
页数：11
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