Soil-buried structures are the most usual means of protection of strategic facilities against explosions. Surface explosions and underground detonations effects on buried structures have been analyzed in this study to evaluate the performance of several approaches which have been suggested to secure underground structures from blast induced damages. Blast induced pressures amplitudes have been evaluated through nonlinear dynamic analyses considering different soil types and results have been compared with conventional formulations. Granular soils have provided more protective efficiency in comparison with cohesive soils. Although concrete blanket does not produce considerable shield effect against blasts waves resulted from surface explosions but a void space or compressible materials under the concrete cover may increase its protectivity. Adjacent trenches or holes in vicinity of the buried structure have provided an effective protection against blast wave's propagation and their efficiency has been evaluated in this study considering different distances from the structure and from each other.
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