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Reduction of blast-induced vibration in tunnelling using barrier holes and air-deck

机译：使用屏障孔和空气甲板减少隧道爆炸振动

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摘要

This paper presents two different kinds of blasting techniques for reducing blast-induced vibration in tunnelling, which are applicable according to the location of nearby structures: line-drilling; and bottom-air-deck. Numerical investigations through a non-linear hydrocode, which can numerically model chemical explosives, were carried out in order to obtain quantitative information on the effectiveness of both methods, and then the numerical results were verified through field experiments. The numerical and experimental results agreed well with each other, and indicated that both methods effectively reduced blast-induced vibration according to the location of structures. From the present numerical and experimental study, it was revealed that when both methods are applied to tunnelling sites, the vibration-reduction effects, that were predicted through the numerical study, can be expected, and thus based on the numerical results, design conditions of both methods for the reduction of blast-induced vibration in tunnelling were proposed by introducing the concept of factor of safety.
机译：本文介绍了两种不同种类的爆破技术，用于减少隧道中的爆破诱导的振动，这适用于附近结构的位置：线钻孔;和底部空气甲板。通过非线性耦合的数值研究进行，可以进行数值模拟化学炸药，以获得有关两种方法的有效性的定量信息，然后通过现场实验验证数值结果。数值和实验结果彼此吻合得很好，并表明两种方法根据结构的位置有效地降低了冲泡振动。从本数值和实验研究中，据揭示，当两种方法应用于隧穿位点时，可以预期通过数值研究预测的减振效应，因此基于数值结果，设计条件通过引入安全因子的概念来提出了两种用于减少隧道爆震的振动的方法。

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