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Keywords: tunnel support pressure
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Proceedings Papers
Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-581
... is tunnel support pressure, and z0 is depth to the tunnel axis (in Figure 2 z0 = C + D/2). Using data from field observations and laboratory extrusion tests they concluded that for undrained conditions in clay the critical stability ratio (at collapse), Nc, was around 6. This was supported by Peck (1969...
