ABSTRACT
Underground structures are vulnerable under blast loads, and it is difficult to protect them from being destroyed. This paper proposes a design method of buffer barrier based on the principle of wave interface transmission. A series of explosion tests of eight different material combinations were carried out to study the attenuation effect of buffer barrier on blast loads and explore the blast resistance against the close-in detonation effect in soil. The results show that the proposed design method can effectively reduce the peak value of blast loads, and the explosion wave passing through the buffer barrier attenuates into a compression wave with a lower peak value and longer duration. Different barrier materials can improve the peak load attenuation efficiency to varying degrees, in which barriers incorporating plastic pipes and steel pipes show a superior attenuation effect in the selected design scheme. The peak load attenuation efficiency decreases approximately linearly with the increase of the average density of the soft interlayer.
