Journal
INTERNATIONAL JOURNAL OF GEOMECHANICS
Volume 20, Issue 5, Pages -Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)GM.1943-5622.0001666
Keywords
Tunnel face; Anisotropy; Friction angle; Limit analysis; Support pressures; Failure pattern
Categories
Funding
- Beijing Municipal Natural Science Foundation of China [8172037]
- National Natural Science Foundation of China [51378002]
Ask authors/readers for more resources
Shield tunnels are widely used in urban underground construction. The stability of the tunnel face has become a crucial issue in shield tunneling. In this paper, the anisotropy of friction angles is taken into account in the upper theorem of limit analysis of the tunnel face. A formula of the anisotropic friction angles is established and applied in the limit analysis of the tunnel face, and the anisotropic parameters can be determined by the simple triaxial compression tests. The results are compared with existing works to validate the reasonability of the proposed method. Two types of constant friction angles are adopted to compare the anisotropic effects on the support pressures distributed uniformly on the tunnel face and the failure mechanism. The results show that the anisotropy of friction angles will lead to an increase in the support pressures and obviously influence the shape and range of the failure pattern. The anisotropy of friction angles should be considered in the stability analysis of the tunnel face.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available