The Specificities of Foundation Ground Vibrations Induced by Pile Driving Under Conditions of Infill Construction in an Existing City Block

摘要

Under condition of infill construction pile driving causes an appreciable impact on adjacent buildings, which should be accounted during the works. The work is the first to present the materials obtained in 1990s. The ground was represented by soft and plastic clay with the thickness from 4.5 to 13.0 meters. We considered the specificities of vibrations induced by pile driving into pre-drilled well with smaller diameter, an axially symmetric source. The frequency of vertical vibrations amounted to 18-20 Hz, while horizontal ones amounted to 13-15 Hz. The amplitude of vertical vibrations in the near zone amounted to 0.11-0.413 mm, while in the immediate vicinity, it amounted to 0.0024-0.0061 mm. Besides the solution of the direct problem of effect estimation on existing facilities, the vibration shielding also was considered. The impact with and without the shield was calculated.