Scholarly record
THE ANALAYSIS OF GROUND VIBRATION INDUCED BY BLASTING AT DIFFERENT ROCK UNITS ON ISTANBUL KADIK\"OY-KARTAL SUBWAY TUNNEL ROUTE
Abstract
This paper presents the results of ground vibration analysis induced by blasting during the construction of the Istanbul Kadık\"oy-Kartal metro tunnel. Different rock formations in this tunnel route which is 21,6 km in length were encountered during the excavation with blasting. As a first stage, Test site is divided into 3 main regions with respect to lithology changes in the rock units and Hoek’s Geological Strength Index value of these rock units. In the first region representing S8 shaft tunnels, 59 events in 44 shots were recorded. In the second region representing S9 shaft tunnels, 51 events in 40 shots were recorded. Finally, in the third region representing S12 shaft tunnels 114 events in 59 shots were recorded. Scaled distance and peak particle velocity data pairs were analyzed statistically. 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 Turkish Environmental Regulation, The United States Bureau of Mines (USBM) and German DIN 4150 Norms in order to predict, and compare the influence grades to the neighboring buildings, and structures.
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References12
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