A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Analysis of Ground-Liner Interaction for Tunnels
Reported herein are the results of a study of ground-liner interaction for tunnels. The main factors considered in this study were the material properties of the ground and liner, tunnel depth, interaction between two parallel tunnels, position of liner installation relative to the tunnel face, and the type of loading to which the liner is subjected. Both analytical and numerical solution techniques are used to investigate ground-liner interaction for various loading conditions and construction sequences. The relationship between ground and liner material properties and the distributions of liner forces, stresses, and displacement resulting from interaction is illustrated for a circular liner inserted in an in situ stressed ground mass. This is accomplished through the use of an analytical solution derived for tunnels located at great depth. To illustrate the influence of the ground surface boundary on liner behavior, the finite element method is used to analyze tunnels located at shallow depths. The finite method is used to simulate the actual advancement of a tunnel through the ground mass. The axisymmetric finite element analyses performed for this part of the investigation yielded information as to the longitudinal distribution of ground stresses and displacements and liner forces and displacements for tunnels in which the liner was installed right at the advancing face, a short distance behind the face, and far behind the face. The finite element method is also used to examine the ground-liner interaction resulting from what is called the localized gravity loading condition. The problem of two adjacent and parallel tunnels is also considered in the study and the influence of pillar width and construction sequence is examined. It is concluded that it is important that the method of analysis selected be applicable to the problem being considered and that the results obtained be properly interpreted.
Analysis of Ground-Liner Interaction for Tunnels
Reported herein are the results of a study of ground-liner interaction for tunnels. The main factors considered in this study were the material properties of the ground and liner, tunnel depth, interaction between two parallel tunnels, position of liner installation relative to the tunnel face, and the type of loading to which the liner is subjected. Both analytical and numerical solution techniques are used to investigate ground-liner interaction for various loading conditions and construction sequences. The relationship between ground and liner material properties and the distributions of liner forces, stresses, and displacement resulting from interaction is illustrated for a circular liner inserted in an in situ stressed ground mass. This is accomplished through the use of an analytical solution derived for tunnels located at great depth. To illustrate the influence of the ground surface boundary on liner behavior, the finite element method is used to analyze tunnels located at shallow depths. The finite method is used to simulate the actual advancement of a tunnel through the ground mass. The axisymmetric finite element analyses performed for this part of the investigation yielded information as to the longitudinal distribution of ground stresses and displacements and liner forces and displacements for tunnels in which the liner was installed right at the advancing face, a short distance behind the face, and far behind the face. The finite element method is also used to examine the ground-liner interaction resulting from what is called the localized gravity loading condition. The problem of two adjacent and parallel tunnels is also considered in the study and the influence of pillar width and construction sequence is examined. It is concluded that it is important that the method of analysis selected be applicable to the problem being considered and that the results obtained be properly interpreted.
Analysis of Ground-Liner Interaction for Tunnels
R. E. Ranken (author) / J. Ghaboussi (author) / A. J. Hendron (author)
1978
446 pages
Report
No indication
English
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