Ground Deformations Ahead Of And Adjacent To A TBM In Sheared Shales At Stillwater Tunnel, Utah
- Organization:
- Society for Mining, Metallurgy & Exploration
- Pages:
- 20
- File Size:
- 1010 KB
- Publication Date:
- Jan 1, 1985
Abstract
Horizontal inclinometer and deflectometer casings were used to measure deformations up to 15.2 m (50 ft) ahead of and adjacent to the heading in highly fractured and sheared shales at the Stillwater Tunnel. The measurements were compared with borehole extensometer and tape extensometer deformations to evaluate ground movements in advance of, adjacent to, and behind an advancing tunnel heading. Ground deformations of up to 127 mm (5 in.) occurred during passage of the innovative "walking blade-gripper" TBM. Deformations were compared with curvometer/distometer and vibrating wire strain gage data from steel ribs to assess rock-support interaction.
Citation
APA: (1985) Ground Deformations Ahead Of And Adjacent To A TBM In Sheared Shales At Stillwater Tunnel, Utah
MLA: Ground Deformations Ahead Of And Adjacent To A TBM In Sheared Shales At Stillwater Tunnel, Utah. Society for Mining, Metallurgy & Exploration, 1985.