A series of tests were conducted on the effects of explosion inside the tunnel entrance to explore the shock wave propagation inside the multilevel gallery structures in the different cases of the ends open or close. And the loads acting on the protective door and the secondary shock wave evolve-ment behind the door were investigated. The magnitude relations were obtained for the attenuation and variation of shock wave overpressure between each two sections of the gallery. The test results demonstrate that the multilevel gallery structure can not only attenuate the peak pressure of the shock wave significantly, but it is more economical than a single straight tunnel with the same attenuation degree of shock wave pressure.%对坑道口部的内爆炸效应进行了系统的实验研究,探讨了端部不同开闭工况下多级穿廊结构内的冲击波传播规律、作用在防护门上的荷载规律及门后次生冲击波的发展与变化规律,给出了多级穿廊结构坑道内各分段之间冲击波超压衰减变化的量值关系.实验结果表明,多级穿廊结构不仅能显著衰减冲击波峰值压力,而且与单一的直坑道相比,在同样的冲击波衰减幅值条件下具有更经济的工程量.
展开▼
