Monitoring construction vibrations at sensitive facilities

摘要

Construction-related vibrations, while temporary, still have the potential to disruptrnvibration- or noise-sensitive operations in adjacent facilities (such as hospitals, laboratoriesrnand low-vibration fabrication facilities). Traditional construction vibration monitors arernconfigured to measure levels corresponding to building damage thresholds. Unfortunately,rnvibration-sensitive equipment can be adversely affected at levels that are orders ofrnmagnitude lower than this. Furthermore, while most construction vibration monitorsrnprovide level information at a single dominant frequency, most criteria for sensitivernequipment are specified over a range of frequencies. Generally, occupants of buildingsrnnear construction sites prefer to continue operations during the construction process. Torndo this, however, they need to know how the construction-related vibrations compare torntheir instrument criteria. To provide this information, we developed a remote monitoringrnsystem that provides real-time vibration and/or noise spectra in the sensitive facility. Thesernspectra can be directly compared to instrument criteria with appropriate alarmrnnotifications as needed. In this paper, we present three case studies that show the evolutionrnof this remote monitoring capability and discuss how the information has been used by therninstitutions where it has been installed.