Study on the distribution characteristics and the regional classification of blast waves on shield tunnel under internal blast

IF 3.9 2区工程技术 Q1 ENGINEERING, CIVIL

Structures Pub Date : 2025-07-24 DOI:10.1016/j.istruc.2025.109784

Liufeng Su , Yajun Xu , Qixiang Yan , Haojia Zhong , Ping Geng , Yongjun Deng

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引用次数: 0

Abstract

The increasing adoption of the shield method in transportation and municipal engineering has heightened concerns regarding the blast resistance performance of shield tunnels. To investigate the propagation characteristics and attenuation behaviors of blast waves induced by internal explosions within shield tunnels, scaled model experiment was designed and conducted in this study. The blast pressure time-history curves on the tunnel walls were recorded for different explosive charges detonated at both center and eccentric positions. Subsequently, numerical simulation was utilized to examine the effects of explosive equivalent, tunnel diameter, detonation positions, and charge geometry on blast wave distribution. Furthermore, wavelet packet energy analysis was applied to the pressure curves to refine the regional classification of blast loading. The finding of this study can provide valuable insights for blast-resistant design and explosion mitigation strategies in shield tunnel engineering.

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内爆作用下盾构隧道爆破波分布特征及区域分类研究

盾构法在交通和市政工程中的应用日益广泛，引起了人们对盾构隧道抗爆性能的关注。为研究盾构隧道内爆引起的冲击波传播特性及衰减特性，设计并进行了比例模型试验。记录了不同装药在中心位置和偏心位置引爆时巷道壁面上的爆炸压力时程曲线。随后，利用数值模拟方法研究了炸药当量、隧道直径、爆轰位置和装药几何形状对冲击波分布的影响。在此基础上，对压力曲线进行小波包能量分析，细化爆炸载荷的区域划分。研究结果可为盾构隧道工程的抗爆设计和缓爆策略提供有价值的见解。

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来源期刊

Structures Engineering-Architecture

CiteScore

5.70

自引率

17.10%

发文量

1187

期刊介绍： Structures aims to publish internationally-leading research across the full breadth of structural engineering. Papers for Structures are particularly welcome in which high-quality research will benefit from wide readership of academics and practitioners such that not only high citation rates but also tangible industrial-related pathways to impact are achieved.