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BLAST AND VIBRATION
MONITORING
Blasting, heavy equipment operating, and pile
driving with impulsive and vibratory devices
constitute seismic sources. Blasts that vent a
shock wave to the atmosphere are a source of an
air pressure wave. These man-generated events
attenuate with distance, but under certain
circumstances, have the potential for causing
damage to structures, sediment fills, groundwater
supplies, etc. |
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| A type of
seismic monitoring that quantitatively measures
ground motion, velocity and acceleration, and air
pressure waves, can be undertaken to assess the
potential for damage in the near vicinity of
blasts and vibration sources. Many years of ground
motion studies have produced the data basis for a
statistical evaluation of potential damage to
different types, shapes, and orientations of
structures. Limits based on these statistical
thresholds appear in various construction codes
and regulations around the country, and
quantitative measurements are required to satisfy
these rules. A real world application is
litigation avoidance. |
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