Seismic Study at Rock Crusher Facility

Navcon engineers were contracted to conduct a seismic study at a Rock Crusher / Recycling Facility and to assess the ground vibration impact into an adjacent residential community.  Narrowband and 1/3 octave band spectra were recorded at the industrial facility as well as in the community.  Ground vibration levels were compared with groundborne criteria established by ANSI, Caltrans, VDI and a number of other engineering organizations.

Project Objective:

• Characterize groundborne vibration levels in and around the industrial facility.
• Determine if groundborne vibration levels exceeded the threshold of human perceptibility.
• Determine if the groundborne vibration levels could result in structural damage in nearby residences.
• Design vibration control measures to reduce groundborne excitation.

	Portable Rock Crusher located next to a residential community.
	The graphic shows narrowband groundborne vibration spectra (in units of peak particle velocity) recorded at specified distances from the Rock Crusher.
	The graphic shows a 1/3 octave band groundborne vibration spectrum (in units of RMS particle velocity) along with a limit spectrum as recommended by ANSI.

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Last modified: November 09, 2010