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针对成层式防护结构中砂土分散层抗爆性能低、易吸水板结的局限性,自主研制了一种可用于分散层的泡沫陶瓷球壳与高黏弹沥青热压复合板材,通过集团装药化爆试验对复合板材进行了抗爆性能研究。研究结果表明,所研制的复合板材具有优异的抗爆性能,其地冲击衰减系数为4.15~4.2,远高于砂土的1.5~3.5。复合板材具有多重应力波衰减机制,包括黏弹性本征衰减、材料破坏引起的衰减、空穴绕射效应引起的衰减和界面相阻尼衰减。同时,复合板材在防水防潮和地下工程环境适应性方面也具有明显的优势。
Aiming at the limitation of low antiknock layer and easy water absorption in the layered protective structure, a kind of foam ceramic spherical shell and high viscoelastic asphalt hot-pressed composite board which can be used for the dispersed layer was independently developed. Chemical explosion test on the anti-explosion performance of the composite plate. The results show that the composite plate developed has excellent antiknock performance, the impact attenuation coefficient of 4.15 ~ 4.2, much higher than the sand 1.5 ~ 3.5. The composite plate has multiple mechanisms of stress wave attenuation, including the viscoelastic intrinsic attenuation, the attenuation caused by the material failure, the attenuation caused by the hole diffraction effect and the damping of the interface phase damping. At the same time, the composite board also has obvious advantages in waterproofing and environmental adaptability of underground engineering.