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Keywords: portal
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-122
... ABSTRACT: The existing Salang tunnel connects Kabul to Northern Provinces of Afghanistan. The tunnel was built by Soviets engineers in 1964s and it is about 2600 m long. The tunnel is located at an altitude of 3400 m so that the portals and mountains are subjected to severe environmental...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-169
... meters. While the cover layer thickness over the entry and exit portals of the tunnel is approximately 5 10 meters, it is approximately 65 meters in the deepest part of the tunnel. Different formations are available on the route of the tunnel. The formations are formed serpentine-limestone-conglomerate...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2012, May 28–30, 2012
Paper Number: ISRM-EUROCK-2012-053
..., marls, or tectonically altered gneiss. Upstream Oil & Gas Tunnel Stability sandstone Reservoir Characterization strength portal eurock 2012 structural geology sidewall shale interbedded sandstone shallow overburden shear strength rock formation overburden weak rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2010, June 15–18, 2010
Paper Number: ISRM-EUROCK-2010-115
..., as an existing old tunnel is to be incorporated into one of the two tubes while staying in use. This creates a delicate situation at the north portal in terms of construction sequence and slope stability. These factors are discussed in this paper. 1 PROJECT OVERVIEW 1.1 Traffic situation in the upper Rhone...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-003
... and linking the system to the European high-speed network. ground transportation borehole Switzerland rail transportation traffic portal sedimentary slice Lötschberg Base Tunnel Jungfrau Wedge intrusion zone ferden Reservoir Characterization mitholz water influx excavation Drilling...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2002, November 25–27, 2002
Paper Number: ISRM-EUROCK-2002-066
..., and have no covering. They only have a primary support in a few highly localised zones. Madeira Island sprayed concrete portal widening Encumeada tunnel levada Island canal execution intake structure Thickness localised zone marine transportation characteristic hydraulic exploitation...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-128
... main tunnel excavation portal instrument diameter excavation face extensometer main tube pilot tunnel excavation construction deformation rock mass tunnel main tunnel convergence Pinglin tunnel tunnel excavation twin tube roadway tunnel Eurock '96, Barta (ed 1996 Balkema...

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