Construction Related Vibrations: Field Verification of Vibration InducedSettlement Model

摘要

The objective of this research is to provide field verification of an analyticalmodel for predicting ground surface settlement due to construction induced vibration. This model was proposed by Borden, Shao, and Gupta in the report 'Construction Induced Vibrations' (1994) to NCDOT and FHWA. Three test sites with residual soil profile were investigated. At one of the sites, in Selma, North Carolina, both settlement of the residual soil profile and the characteristics of the vibration source, and the wave propagation behavior were monitored during pile driving. Laboratory resonant column and torsional shear tests were performed on samples obtaind from the field test site. Based on a comparison between the measured field settlement at this site and that predicted based on laboratory test results, the proposed analytical model is shown to be somewhat conservative. Vibration attenuation with depth in the residual soil profile was investigated for the first time. The vibration time histories of the field test were analyzed and the peak velocities at various depths and surface distances were obtained. In addition, the ground vibration frequency and Rayleigh wave velocity were calculated. The Rayleigh wave attenuation function in the soil profile agreed well with the field tests records. The approach to evaluate the wave attenuation on the ground surface was confirmed to be conservative.