ANALYSIS OF MEASUREMENTS RESULTS OF THE GROUND VIBRATION INDUCED BY BLASTING DURING THE TUNNELING FOR ISTANBUL SUBWAY IN TURKEY

摘要

Although many research studies had been carried out in the past in order to eliminate environmental issues produced from blasting unfortunately a general approach or formula has not been established yet because of the complexity of the matter. In addition to the wave and ground motion characteristics, the complexity of blasting parameters and site factors restrict the developing of a general criterion. So experimental site-specific studies should be still done in order to predict and control blasting effects. This paper presents the result of ground vibration measurements induced by blasting, which were performed during the tunneling for the Istanbul Subway. The scope of the study includes the prediction of the peak particle velocity and determines the slope of the attenuation curve together with the maximum charge per delay for the test site. Ground vibration components were measured for all blast events using 4 different types vibration monitors during the advancement of about 300 m length of the tunnels which required blasting over a long period. At the end of the analysis of the data pairs some relationships are established between particle velocity and scaled distance.