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- Title
Analytical Solution for a Loess Tunnel Based on a Bilinear Strength Criterion.
- Authors
Wang, Mingnian; Dong, Yucang; Yu, Li
- Abstract
The design load of a loessal tunnel is usually calculated using the conventional Mohr-Coulomb strength criterion, which ignores the structural strength of loess and provides inaccurate calculation results. The present paper therefore proposes a bilinear strength criterion considering the structural strength characteristics of loess determined in a triaxial shear experiment. Then, using the new strength criterion, a new theoretical solution is derived for the stress and displacement of loess in each region separately; the solution is validated by numerical simulation. Lastly, the ground reaction curve and the design load of a tunnel are obtained using the proposed method considering the structural strength of loess. The results obtained using the new method are more reasonable and accurate than the results calculated using the conventional method. The proposed strength criterion and theoretical solution expand the knowledge base of loess engineering and provide guidelines for the design and construction of underground structures in loess ground.
- Subjects
LOESS; ANALYTICAL solutions; UNDERGROUND construction; TUNNELS; TUNNEL design &; construction; BILINEAR forms
- Publication
Soil Mechanics & Foundation Engineering, 2020, Vol 57, Issue 4, p296
- ISSN
0038-0741
- Publication type
Article
- DOI
10.1007/s11204-020-09669-w