one with only a value, which is always larger than the individual PPV vector values. Values in all three vector directions measured by the seismograph. The peak vector sum (PVS) is usually also quoted it is simply the square root of the sum of the squares of the it has both a value and an associated direction). Within the silver-gray, cylindrical seismograph transducer head are called. This quantity is measured in all three perpendicular directions (" axes") of the seismograph's " geophones", as the magnet-in-coil detecting devices In most of the rest of the world in millimeters per second (mm/sec). As the name implies, PPV is a measurement of maximum ground particle movement speed, specified in the U.S. The one most accepted in the field as an indicator of damage potential is the peak particle The monitor translates its raw observations into a number of different measures of ground vibration. It is used in both blasting and construction settings, in spite of some serious limitations Tool for measuring vibration and determining compliance with ground vibration standards. The blasting seismograph vibration monitor (example photo at left) is the most commonly used Of vibration monitoring, a discipline critical to the meaningful use of vibration standards. Other pages of the Construction Vibration Damage Guide for Homeowners expand on the subject Has, as part of its content, much more extensive information on the meaning, interpretation and applicability of vibration standards.
You can find online an overview of its content, an Executive Summary,Ī broader view in its CVDG Introduction section, an introduction to the field and terminology in the CVDG's Vibration 101 for those new to vibration scienceĪnd effects, and a hyperlinked list of all the pages available online in its CVDG Pro and Homeowners Contents page. Or viewable, in part, online as web pages.
(CVDG) (see example pages at right), downloadable free in PDF format (), ad and navigation-free with extra content, from Vibration Standards is one chapter of the over 100 page Construction Vibration Damage Guide for Homeowners The vibration velocity limits they set, how they may be properly applied and what their use might mean for someone whose home or property may have been damaged by construction vibration. Following is a relatively non-technical description of vibration standards generally, their important limitations, the standards most commonly used for construction and blasting vibration, The reliability of statements based on standards. Some understanding of ground vibration standards and velocity limits, how they were developed, what they say, how they are properly used and what their shortcomings and limitations might be, especially in construction contexts, is vital to evaluating