Tunnels in Copenhagen are drilled through highly anisotropic limestone comprising alternating strongly lithified and less lithified parts. The mass quality of the limestone is usually defined from fracture spacing registered in core samples. The deposit is, however, affected destructively by drilling activity yielding a low Rock Quality Designation RQD. In-situ observations of the limestone in excavations or televiewer logs reveal only few natural discontinuities compared to core logging, indicating a very good suitability for tunneling.
|Title of host publication||11th Congress of the International Society for Rock Mechanics|
|Publisher||Taylor & Francis Group|
|Publication status||Published - 2007|
|Event||11th Congress of the International Society for Rock Mechanics - Lisbon, Portugal|
Duration: 9 Jul 2007 → 13 Jul 2007
|Conference||11th Congress of the International Society for Rock Mechanics|
|Period||09/07/2007 → 13/07/2007|