Open AccessStudy on vibration law of complex foundation of terminal yard under dynamic consolidation
Author(s) -
Fanglong Yuan,
LinHeng Wei
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/768/1/012052
Subject(s) - hammer , vibration , dynamic compaction , shell (structure) , foundation (evidence) , structural engineering , geotechnical engineering , consolidation (business) , materials science , compaction , engineering , composite material , physics , acoustics , law , accounting , political science , business
Hard shell layers with different thicknesses are usually distributed on the surface of terminal yard foundation, in order to ensure the safety of surrounding buildings and provide reasonable suggestions for dynamic compaction construction, it is urgent to study the vibration regularity of dynamic compaction. Based on the actual engineering project, this paper systematically studies the vibration law of hard shell foundation under different dynamic compaction construction parameters, it is concluded that: in the stage of hard shell breaking by column hammer, the peak value of vibration velocity is proportional to the thickness of hard shell layer, the peak vibration velocity decreases exponentially with the increase of distance, the minimum safe distance between the site and surrounding buildings is 37m to 58m; when the tamping energy is constant, the peak value of vibration velocity is inversely proportional to the diameter of hammer, on the premise of satisfying the reinforcement effect, large diameter hammer should be preferred; in the stage of flat hammer tamping foundation, the more tamping times, the greater the peak value of vibration velocity, and the amplitude of vibration velocity peak finally tends to be stable; in the stage of column hammer breaking hard shell layer, the peak value of vibration velocity decreases with the increase of tamping number, until the hard shell layer is damaged, the tamping energy is absorbed by the underlying soft clay layer, the peak value drops sharply.