CONSTRUCTION CONTROL INSTRUMENTATION USED DURING TUNNEL ENLARGEMENT
A geotechnical instrumentation program consisting of borehole extensometers and portable tape extensometer stations was effectively used to monitor concrete liner deformations and guide construction procedures during enlargement of a 75-year old Union Pacific Railroad tunnel in Wyoming. Enlargement involved excavation of the old concrete invert and placement of 5,941 ft of new concrete invert 6 ft lower in squeezing shales, fault zones and water-bearing sandstones. Instrumentation data were used to guide procedures for excavating the old invert, installation of temporary interior struts, underpinning existing liner walls, and placing the new concrete invert.
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Supplemental Notes:
- Presented at the 3rd Rapid Excavation & Tunneling Conference, Las Vegas, Nevada, 14-17 June 1976.
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Corporate Authors:
American Institute of Mining, Mettalurgy & Petroleum Engineers
345 East 47th Street
New York, NY United States 10017 -
Authors:
- Robinson, R A
- Miller, R P
- Monson, D L
- Conference:
- Publication Date: 1976
Media Info
- Pagination: p. 742-758
Subject/Index Terms
- TRT Terms: Car clearances (Railroads); Construction; Construction management; Construction projects; Extensometers; Instrumentation; Measuring instruments; Railroad facilities; Tunnel lining; Tunneling
- Identifier Terms: Union Pacific Railroad
- Old TRIS Terms: Clearances; Construction control; Tunnel excavation; Tunnels and tunneling
- Subject Areas: Bridges and other structures; Construction; Railroads;
Filing Info
- Accession Number: 00152811
- Record Type: Publication
- Source Agency: Engineering Index
- Report/Paper Numbers: Conf Paper
- Files: TRIS
- Created Date: May 31 1977 12:00AM