THE ANALYSIS OF GROUND VIBRATION BLAST INDUCED ON ISTANBUL KAVACIK-BEYKOZ WASTE WATER TUNNEL

Abstract

This paper presents the results of ground vibration measurements and environmental issues occurred on tunnel blasting activities during Kavacik-Beykoz waste water tunnel construction under a residential area in Istanbul, Turkey. Within the scope of the study, the blasting pattern of tunnel was engineered by using Tunnel 2000 design software. 5 events in 5 shots at S2 shaft tunnels, , 6 events in 6 shots at S4 shaft tunnels,, 32 events in 32 shots at S6-shaft tunnels and, 7 events in 7 shots at S7 shaft tunnels were recorded.. The particle velocities and frequencies associated with 50 shots during the advancement of the tunnels were monitored and analyzed by vibration monitors at the test site. Scaled distance and peak particle velocity data pairs were analyzed statistically. During the statistical analysis, three different predictor equations widely used in the literature were used to predict peak particle velocity (PPV) and the results and comparison of the predictor equations are presented in this paper. As a result of this analysis, empirical relationships between Scaled distance and peak particle velocity for these regions were established with higher correlation coefficients. Finally, the particle velocities and frequency values of all blast events were evaluated according to T.C. Ministry of Environment and Forest's Regulation of Management and Evaluation of Noise, The United Sates Bureau of Mines (USBM) and German DIN 4150 Norms in order to predict, and compare the influence grades to the neighboring buildings, and structures.