Complex variable solutions for forces and displacements of circular lined tunnels. (English) Zbl 1426.74323
Summary: A complex variable method for solving the forces and displacements of circular lined tunnels is presented. Complex potentials for the stresses and displacements are expressed in the term of series expression. The undetermined coefficients of the complex potentials are obtained according to the stress boundary conditions along the lining inner surface and the displacement and surface traction boundary condition along the lining and rock-mass interface. Solutions for the stresses and displacements of the tunnel lining and rock-mass are then established by applying Muskhekishvili’s complex variable method. In addition, forces solutions for linings are presented based on the tangential stress at the two boundaries. Examples are finally established to reveal the applicability and accuracy of the proposed method. The effects of the degrees from the tunnel crown to the invert, coefficient of the lateral earth pressure, and distance from the rock-mass to the interface on the regulations of the lining
forces and rock-mass stresses are also thoroughly investigated.
MSC:
| 74S70 | Complex-variable methods applied to problems in solid mechanics |
| 74L10 | Soil and rock mechanics |
| 74K10 | Rods (beams, columns, shafts, arches, rings, etc.) |
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