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Abstract
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Recently, blasting loads have come into consideration because of the large number of intentional or unintentional
events that affected important structures around the world, obviously indicating that the topic
is relevant for purposes of structural design and reliability analysis. This paper has evaluated the dynamic
responses of buried tunnel in depths of 3.5, 7, 10.5 and 14 m for surface detonation of 1000 kg TNT charge
in a surrounding sandy soil. The Kobe box shape subway tunnel was used as an example to evaluate and
compare with semi ellipse, circular and horseshoe shape tunnel. The finite element software LS-DYNA has
been used to model and to analyze the outcome of this project, specifically to be modeled in the area of
the second interaction due to explosion. The results indicate that the circular and horseshoe tunnels are
less resistant to demolition than the box shape tunnel however the semi ellipse tunnel is more resistant
than the box shape tunnel.
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