Self-contained instrument for measuring subterranean tunnel wall deflection

Patent · Sun Jan 01 00:00:00 EST 1978

OSTI ID:863098

Rasmussen, Donald Edgar ^[1]

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1. Kennewick, WA

The deflection of a subterranean tunnel is measured with a rod-like, self-contained instrument that is adapted to be inserted into a radially extending bore of the tunnel adjacent an end of the tunnel where the tunnel is being dug. One end of the instrument is anchored at the end of the bore remote from the tunnel wall, while the other end of the intrument is anchored adjacent the end of the wall in proximity to the tunnel wall. The two ends of the instrument are linearly displaceable relative to each other; the displacement is measured by a transducer means mounted on the instrument. Included in the instrument is a data storage means including a paper tape recorder periodically responsive to a parallel binary signal indicative of the measured displacement.

• Research Organization: Battelle Memorial Institute, Columbus, OH (United States)
• DOE Contract Number: AC06-76RL01830
• Assignee: United States of America as represented by Secretary of (Washington, DC)
• Patent Number(s): US 4091990
• OSTI ID: 863098
• Country of Publication: United States
• Language: English

Related Subjects

self-contained
instrument
measuring
subterranean
tunnel
wall
deflection
measured
rod-like
adapted
inserted
radially
extending
bore
adjacent
dug
anchored
remote
intrument
proximity
linearly
displaceable
relative
displacement
transducer
means
mounted
included
data
storage
including
paper
tape
recorder
periodically
responsive
parallel
binary
signal
indicative
means including
data storage
radially extending
signal indicative
storage means
means mounted
self-contained instrument
subterranean tunnel
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