OBSERVATIONS DURING CONSTRUCTION OF ROCK TUNNELS FOR THE WASHINGTON, D.C. SUBWAY
The Washington, D.C. rapid transit system (METRO) when completed will consist of 98 miles of double track rail. Fifteen miles will be tunneled in rock and 12 large underground rock chambers will be constructed at station locations. The University of Illinois is under contract to Metro to provide observations and instrumentation services in the initial phase of construction. The program is designed to monitor construction conditions as well as to provide information useful for the design of future rock tunnels and rock chambers in the Metro system. This paper presents the results of observations in the rock tunnels constructed to date. One of the major objectives of the observational program was to determine the orientation and character of joints and shear zones and to evaluate their effect on support requirements for various tunnel orientations and configurations.
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Supplemental Notes:
- North American Rapid Excavation and Tunneling Conference Proceedings, Chicago, Illinois, 5-7 June 1972.
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Corporate Authors:
American Institute of Mining, Mettalurgy & Petroleum Engineers
345 East 47th Street
New York, NY United States 10017 -
Authors:
- Mahar, J W
- Gau, F L
- Cording, E J
- Conference:
- Publication Date: 1972
Media Info
- Features: Figures;
- Pagination: p. 659-681
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Serial:
- Volume: 2
Subject/Index Terms
- TRT Terms: Extensometers; Geological events; Railroad stations; Rapid transit; Rock mechanics; Shotcrete; Tunnel lining; Tunneling; Tunnels
- Identifier Terms: Washington Metropolitan Area Transit Authority
- Old TRIS Terms: Geological conditions
- Subject Areas: Bridges and other structures; Geotechnology; Railroads; Terminals and Facilities;
Filing Info
- Accession Number: 00051291
- Record Type: Publication
- Report/Paper Numbers: Proceeding
- Files: TRIS
- Created Date: Mar 18 1974 12:00AM