爆炸荷载作用下地铁隧道的冲击反应研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (12) : 68-72.

论文

爆炸荷载作用下地铁隧道的冲击反应研究

孔德森1, 2, 孟庆辉1, 张伟伟1, 张秋华1

作者信息 +

shock responses of metro subjected to explosive loads

Kong De-sen1, 2, Meng Qing-hui1, Zhang Wei-wei1, Zhang Qiu-hua1

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文章历史 +

摘要

随着地铁的大规模兴建，地铁隧道的抗爆防护研究成为一个迫切需要解决的问题。针对南京地铁区间隧道的实际工程地质条件，建立了地铁隧道的冲击反应计算模型和各种材料的模型，采用流固耦合算法，对10kgTNT炸药作用下地铁隧道的冲击反应进行了全面研究。研究结果表明，隧道衬砌的速度和加速度变化与超压有关，随着距爆心距离的增大，爆炸冲击波对衬砌结构的影响逐渐减弱，而且在爆炸的初始时刻，隧道衬砌处于受拉状态，随着时间的推移，超压峰值逐渐衰减，隧道衬砌则由受拉状态变为受压状态，并逐渐趋于稳定，从而为地铁隧道的抗爆防护和应急预案的制定提供了依据。

Abstract

With the large-scale construction of metro, the research on the anti-explosion protection of metro tunnel becomes an urgent problem. Aimed at the practical engineering geological conditions of the running tunnel in Nanjing metro, a calculation model for the shock responses of the metro tunnel was established, and comprehensive study on the shock response of the metro tunnel under the action of 10kg TNT was conducted with fluid-structure coupling computation. The research results indicate that velocity and acceleration variations of the liner are related with overpressure and with the increase of the distance from blasting center, the influence of the explosive shock waves on the liner structure decreases. Moreover, at the initial time of the explosion, the liner of the metro is in tensile state, and with time lapses, the peak value of the overpressure decreases gradually, then the tunnel liner changes to be compressed and tends to be stable finally. This provides references for the anti-explosion protection of metro tunnel and the formulation of the emergency plan.

导出引用

孔德森;;孟庆辉;张伟伟;张秋华. 爆炸荷载作用下地铁隧道的冲击反应研究[J]. 振动与冲击, 2012, 31(12): 68-72

Kong De-sen;;Meng Qing-hui;Zhang Wei-wei;Zhang Qiu-hua . shock responses of metro subjected to explosive loads[J]. Journal of Vibration and Shock, 2012, 31(12): 68-72