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Keywords: convergence curve
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Proceedings Papers

Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-167
... occurrence of plastic flow through convergence measurement. The authors analyzed in detail approximately 500 convergence curves observed in six motorway tunnel projects, which were driven through shale and sandstone layers, granitic rock and slate. As a result, the extent of loosening zone and allowable...
Proceedings Papers

Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-179
... advances. If a lining is placed, Pi is the confining action. Figure 2 shows the convergence curve CV and the confinement curve CF in the diagram Pi - Ui, that can be considered as a summary of what information we have about both structures. The equilibrium of the tunnel is given by the intersection of the...
Proceedings Papers

Paper presented at the 6th ISRM Congress, August 30–September 3, 1987
Paper Number: ISRM-6CONGRESS-1987-145
... convergence equation. The convergence curve that is represented by this extended approach is shown in Fig. 1, plotted with respect to the distance from the face. In this figure, the lined tunnel case is compared with the unlined case (given by Guenot et al., op cit). Upstream Oil & Gas tunnel...
Proceedings Papers

Paper presented at the 6th ISRM Congress, August 30–September 3, 1987
Paper Number: ISRM-6CONGRESS-1987-227
... of face advance and excavation can be represented by a gradual continuous increase of the tunnel convergence and the ground characteristic is then obtained by calculating the support pressure that would be required to maintain equilibrium at each point of this convergence curve. The support...

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