Ground vibration measurements with special reference to pile driving

摘要: There has been increased concern in recent years over the level and nature of ground vibrations. The importance such vibration rapidly due to developments construction urban areas, where effects borne on both humans structures are considerable. Research undertaken improve techniques used measurements, analyses evaluation vibrations caused by rail road traffic, blasting particular those generated from pile driving activities. amplitude operation is a function type, hammer type conditions. In order investigate these three variables, large number visits were made different sites which provided range main requirements analysis measured include their relevant frequency. usually expressed term peak particle acceleration, velocity or displacement. this work, terms using transducers (geophone). evaluate true resultant velocity, components simultaneously orthogonally positioned sets geophone. Recording data achieved employing portable digital recorder digitizes analogue signals recieved stores captured standard floppy disks for further analysis. results presented tables diagrams detailed comments given discussion recorded data. Some methods reviewed two new proposed. These proposed application hemispherical projection technique interpreting displaying dimesional information into dimensional plane. other method analysed attenuation according arrival time waves toe along surface. It suggested that when times wave fronts coincide at one point, highest may be expected poinL effect building investigated scale test Aitwick dynamic strain purpose built L-shape walls during steel sheet H-pile stand-off winch-drop-hammer vibrodriver.