In this paper, the displacement that takes place during the construction of Dazhailing tunnel, a deep seated loess tunnel with large deformation along the Baoji Zhongwei railway, is studied. The measured convergence...In this paper, the displacement that takes place during the construction of Dazhailing tunnel, a deep seated loess tunnel with large deformation along the Baoji Zhongwei railway, is studied. The measured convergence data is optimized by use of accelerating step size method. And then finite element method (FEM), boundary element method (BEM), and complex variable method (CVM) are employed for elastic and visco elastic displacement back analyses. Elasto plactic FEM computation is completed and the varying regularity of the deformation in the tunnel is discussed.展开更多
文摘In this paper, the displacement that takes place during the construction of Dazhailing tunnel, a deep seated loess tunnel with large deformation along the Baoji Zhongwei railway, is studied. The measured convergence data is optimized by use of accelerating step size method. And then finite element method (FEM), boundary element method (BEM), and complex variable method (CVM) are employed for elastic and visco elastic displacement back analyses. Elasto plactic FEM computation is completed and the varying regularity of the deformation in the tunnel is discussed.
