Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ground Characterization for Tunnels in High Mountain Ranges — Risk and Mitigation
Many tunnels are constructed in areas where access to the surface above the tunnel for purposes of direct exploration (boreholes) is physically very difficult and costly. Characterization of the rock mass to be traversed by the tunnel is still necessary to design the tunnel and mitigate construction risk, so alternate methods of exploration and characterization become imperative. These methods are described using case histories from the Andes and the Himalayas. Procedures used are usually more indirect, relying in remote sensing and surface geologic mapping and interpretation, but they usually lead to a deeper understanding of the rock mass and its behavior. The methodology consists on starting with a regional geologic model, understanding the geologic architecture, including lithology and discontinuities, and progressively moving into a detailed local ground model that fits well with the regional scale model, and into a rock mass classification that allows estimation of support types, rock mass strength, groundwater inflows, and excavation advance rates. This is not a new approach, but it is usually overlooked in projects where drilling can easily be performed.
Ground Characterization for Tunnels in High Mountain Ranges — Risk and Mitigation
Many tunnels are constructed in areas where access to the surface above the tunnel for purposes of direct exploration (boreholes) is physically very difficult and costly. Characterization of the rock mass to be traversed by the tunnel is still necessary to design the tunnel and mitigate construction risk, so alternate methods of exploration and characterization become imperative. These methods are described using case histories from the Andes and the Himalayas. Procedures used are usually more indirect, relying in remote sensing and surface geologic mapping and interpretation, but they usually lead to a deeper understanding of the rock mass and its behavior. The methodology consists on starting with a regional geologic model, understanding the geologic architecture, including lithology and discontinuities, and progressively moving into a detailed local ground model that fits well with the regional scale model, and into a rock mass classification that allows estimation of support types, rock mass strength, groundwater inflows, and excavation advance rates. This is not a new approach, but it is usually overlooked in projects where drilling can easily be performed.
Ground Characterization for Tunnels in High Mountain Ranges — Risk and Mitigation
Jaramillo, Carlos A. (Autor:in)
GeoCongress 2008 ; 2008 ; New Orleans, Louisiana, United States
GeoCongress 2008 ; 468-475
07.03.2008
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Ground Characterization for Tunnels in High Mountain Ranges-Risk and Mitigation
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