Influence of Geological Conditions on Measured TBM Vibration Frequency

摘要

This paper examines TBM vibration as a source of information about geological conditions.rnAn EPB TBM was outfitted with accelerometers to monitor vibration during excavation of the UniversityrnLink light rail tunnel project (U230) in Seattle Washington. Impact-response testing of the TBM indicatedrnthat significant signal over a wide range of frequencies transfers from the cutterhead where vibration due tornground interactions emanate, to the bulkhead where sensors can be installed. Analysis of the vibration datarncollected during excavation indicates that both amplitude and frequency content appear to be influenced byrnTBM operating parameters and by geological conditions.