Vibration monitoring is one part of a complete construction monitoring program often required for many construction projects, particularly in New York City or other urban areas. For example, New York City building codes require a monitoring program in many instances, such as when underpinning work is being completed, or within a 90’ radius of a NYC landmarked building/historic district(as per NYC Building Code TPPN 10/88).
Vibration monitoring is specifically used to monitor potentially damaging ground vibration that can occur with many common construction activities. Excavation, pile driving, blasting, demolition and movement of construction vehicles are among the typical construction activities that can cause ground vibration. High tech seismographic equipment, instruments, and systems are used to measure and record ground vibrations throughout a construction project for maximum accuracy and efficiency. Equipment is either monitored remotely or is manned by trained field technicians.
Since the needs of each construction project may vary depending on the specifics of the project, site, locations and a variety of other factors, each construction project benefits from a custom monitoring program. A monitoring program may involve a combination of services, including pre-construction survey, vibration monitoring, crack gauge monitoring, optical structural surveying, and tilt meter monitoring.
Vibration monitoring is often performed on a continuous basis for a variety of reasons. Prior to construction, continuous vibration monitoring is used to establish a baseline of ground vibrations prior to beginning any construction activities. During the construction activities, continuous remote monitoring can be used to measure peak particle velocity and provide real time constant reporting and results to the site engineer or other construction site managers. Continuous monitoring allows for reporting all readings, including any vibration spikes in real time.