A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Rational Design of Tunnel Supports: Tunnel Support Loading Caused by Rock Failure
Two methods are presented for the analysis of tunnel support loading caused by rock failure. In the first part of this thesis closed-form solutions are used, in the second part numerical techniques. Emphasis is put upon the statical indeterminacy of the problem and upon the necessity for considering the relative displacements between ground and support. From this follows the need for a realistic calculation of the stiffness of ground and support, as well as the need to consider the sequential development of the interaction between these two elements. It is assumed that the rock mass behavior during failure is softening and dilatant. Interface problems between ground and support that can strongly influence the effective support stiffness are discussed. In the second part of this thesis the ground behavior is modeled by the finite element method. The elastic parameters that determine the rock behavior are changed progressively in order to simulate softening and volume increase of the failing rock mass. This method is used in an axisymmetric analysis of failure patterns near the face and to study the influence of face behavior on support loading.
Rational Design of Tunnel Supports: Tunnel Support Loading Caused by Rock Failure
Two methods are presented for the analysis of tunnel support loading caused by rock failure. In the first part of this thesis closed-form solutions are used, in the second part numerical techniques. Emphasis is put upon the statical indeterminacy of the problem and upon the necessity for considering the relative displacements between ground and support. From this follows the need for a realistic calculation of the stiffness of ground and support, as well as the need to consider the sequential development of the interaction between these two elements. It is assumed that the rock mass behavior during failure is softening and dilatant. Interface problems between ground and support that can strongly influence the effective support stiffness are discussed. In the second part of this thesis the ground behavior is modeled by the finite element method. The elastic parameters that determine the rock behavior are changed progressively in order to simulate softening and volume increase of the failing rock mass. This method is used in an axisymmetric analysis of failure patterns near the face and to study the influence of face behavior on support loading.
Rational Design of Tunnel Supports: Tunnel Support Loading Caused by Rock Failure
J. J. K. Daemen (author)
1975
440 pages
Report
No indication
English
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